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201 records found.
Stream chemistry concentrations and fluxes using proportional sampling in the Andrews Experimental Forest, 1968 to present
Stream chemistry sampling and analysis was initiated at the H.J. Andrews Experimental Forest in 1968 in two small watersheds (Watersheds 9,10). Sampling has expanded as additional paired watershed studies (Watersheds 1, 2, 6, 7, 8) and monitoring (Mack, Lookout Cr) were initiated over time. Water samples are collected ...
Precipitation measurements from historic and current standard, storage and recording rain gauges at the Andrews Experimental Forest, 1951 to present
Andrews Forest precipitation has been measured continuously using various rain gage types since 1951. Most of these rain gages are standard (non-recording) gages with 7.5 or 8 inch orifices or large capacity storage gages intended for sites with limited access collected irregularly over longer intervals. Recording rain...
Stream discharge in gaged watersheds at the HJ Andrews Experimental Forest, 1949 to present
Streamflow from selected small watersheds has been continuously monitored at the HJ Andrews Experimental Forest since November 1952. The objectives of this research and monitoring include: (1) evaluate long-term changes in hydrology associated with various forest management treatments, notably clearcut logging, selecti...
Water stable isotopes for streams and precipitation samples in the HJ Andrews Experimental Forest, 2014-2023
Water samples have been collected for analysis of water stable isotopes (O18/16 and H2/H1) at different locations in the HJ Andrews Experimental Forest and over different periods since 2014 in the HJ Andrews Experimental Forest. The database includes: 1) grab samples collected over the stream network of the Andrews For...
Raw microclimate data from plots at burned areas from the 2020 Holiday Farm fire in the Andrews Experimental Forest and Hagan Block, 2022-2024
This dataset includes a suite of microclimate sensor data from areas burned by the 2020 Holiday Farm fire within the McKenzie River basin. A total of 42 microclimate sensor suites were installed in July and August of 2022 distributed across RS01, RS08, RS15, WS02, WS09, WS01, HGBK. All sensor locations are within the H...
Soil moisture and soil temperature from Benchmark Stations at the HJ Andrews Experimental Forest, 1987 to present
A three-level hydro-climatological network for data monitoring was established in 1994. The networks at each level are nested to form a coordinated program of data acquisition and measurement. A future vision of linking the benchmark meteorological stations with regional weather stations to expand the future scope of s...
Air and soil temperature data from the Reference Stand network at the Andrews Experimental Forest, 1971 to present
The current network of temperature measurement sites are designed to represent spatial variability of air and soil temperature in rugged mountain topography, and serve as second-level stations to capture specific microclimate temperatures in conjunction with a network of Benchmark Meteorological Stations (MS001). The a...
Meteorological data from benchmark stations at the HJ Andrews Experimental Forest, 1957 to present
A three-level hydro-climatological network for data monitoring was established in 1994. The networks at each level are nested to form a coordinated program of data acquisition and measurement. A future vision of linking the benchmark meteorological stations with regional weather stations to expand the future scope of s...
Long-term growth, mortality and regeneration of trees in permanent vegetation plots in the Pacific Northwest, 1910 to present
A network of more than 130 permanent vegetation plots provides long-term information on patterns and rates of forest succession in most of the major forest zones of the Pacific Northwest. The plot network extends from the coast to the Cascades in western Oregon and Washington and east to ponderosa pine forests in the O...
Solute dynamics in the hyporheic mesocosm in Watershed 1 at the H.J. Andrews Experimental Forest, 2019-2020
We investigated biogeochemistry along a 12-m hyporheic mesocosm that allowed for controlled testing of seasonal and spatial water quality changes along a flowpath with fixed geometry and constant flow rate. Water quality profiles of oxygen, carbon, and nitrogen were measured at 1-m intervals along the mesocosm over mul...
Fish and Amphibians species list of the Andrews Experimental Forest, 1987 to present
This is a compilation of fish species currently known to be present within the H.J. Andrews Experimental Forest. Species were extracted from several different aquatic vertebrate studies over time. Taxonomy is updated as needed.
Wind speed and direction data from benchmark stations at the HJ Andrews Experimental Forest, 1973 to present
A three-level hydro-climatological network for data monitoring was established in 1994. The networks at each level are nested to form a coordinated program of data acquisition and measurement. A future vision of linking the benchmark meteorological stations with regional weather stations to expand the future scope of s...
Water chemistry in streams and precipitation samples in the HJ Andrews Experimental Forest, 2022-2023
Water samples have been collected for chemical analysis at various locations in the HJ Andrews Experimental Forest, starting in 2022. The database includes grab samples gathered approximately weekly in selected streams and bulk precipitation collected at the PRIMET meteorological station. Samples were analyzed for cati...
Solute dynamics in the hyporheic zone of a headwater stream in Watershed 1 at the Andrews Experimental Forest, 2016-2018
This project examined the interactions between stream water and subsurface sediment to quantify how these interactions influenced organic C respiration and dissolved inorganic C (DIC) production in the hyporheic zone of a high-gradient headwater mountain stream draining a forested catchment at the H. J. Andrews Experim...
Interviews with members of the HJA Community during the Lookout Fire, HJ Andrews Experimental Forest, 2023
This dataset records the interview instrument, analytical codebook, and summary of results for the 2023 Lookout Fire Qualitative Interviews. Data was collected in 2023 in Corvallis, Oregon, and over Zoom. Members of the H. J. Andrews Experimental Forest (HJA) community (e.g., university faculty and administrative profe...
Drought experiment on aquatic vertebrate populations in McRae Creek, HJ Andrews Experimental Forest, 2022
Three distinct reaches in McRae Creek west tributary (MCTW) within the HJ Andrews Experimental Forest in western Oregon were designated for manipulation and data collection. Manipulations included increasing the temperature (T), reducing streamflow (Q), and a reference (R reach). Population estimates of vertebrates, sp...
Water stable isotopes for streams samples in Mary's River Watershed, 2014-2015
Water samples were collected for analysis of water stable isotopes (O18/16 and H2/H1) in the Marys River basin of Benton County, Oregon. Water samples collected approximately monthly between 2014 and 2015 at 24 streams.
Species interactions during succession in the western Cascade Range of Oregon, 1990 to present
The factors that contribute to plant species establishment and decline following disturbance determine the rates and patterns of successional change of a system. In this long-term field experiment, we test the commonly held assumption that competition for space or resources by dominant species determines the outcome of...
Survey of Pacific Northwest public land managers science and values project, 2023
This dataset records survey data about public land managers who work in Oregon and Washington (Forest Service, Bureau of Land Management, Fish and Wildlife Service, National Park Service, Oregon Department of Forestry, Washington Department of Natural Resources). Data was collected in 2023 via the online survey platfor...
Forest-wide bird survey at 183 sample sites the Andrews Experimental Forest from 2009 to present
Bird occurrence data collected at 183 sample locations within the H. J. Andrews Experimental Forest (HJA) from 2009-present. We used a stratified, systematic, random design to select sample locations. We stratified across elevation, distance to road, and habitat type (plantation or mature/old-growth forest). We conduct...
Air temperature at core phenology sites and additional bird monitoring sites in the Andrews Experimental Forest, 2009 to present
The H.J Andrews phenology study air temperature network includes 16 core phenology sites, 40 core bird sites and 128 auxiliary bird sites. This study examines air temperatures at multiple sites within the Andrews Experimental Forest. Air temperatures were recorded 1.5 m above ground at 184 sites distributed on an 800-m...
Cold air drainage transect studies at the Andrews Experimental Forest, 2002 to Present
Temperature data are being collected to investigate the effects of elevation and local topographic position on the patterns of cold air drainage and pooling in the HJ Andrews Forest, and how they vary with synoptic weather patterns. The main focus of the study is cold air drainage in the Lookout Creek area, but others ...
Meteorological data from the Discovery Tree at the Andrews Experimental Forest, 2015 to present
The upper-canopy of forests is known to experience a very different leaf wetness than the rest of the forest: it is often simultaneously brighter, hotter, windier, and drier. The upper canopy also contains most of the leaf area, and because it absorbs most of the solar radiation, it accounts for the great majority of c...
Cone production of upper slope conifers in the Cascade Range of Oregon and Washington, 1959 to 2022
Seed supply is a key feature of tree population dynamics, and seed production may be indicative of environmental and biological drivers. This study examines cone production in upper-slope, true fir-hemlock forests of the Pacific Northwest, starting in 1959 to the present. Annual surveys of cone counts of Abies spp. (A....
Vegetative Phenology observations at the Andrews Experimental Forest, 2009 - Present
The vegetation phenology study is part of a larger effort to understand the influence of climate variability and change on trophic interactions in mountainous terrain. Phenology Core Sites were selected to capture the variation in elevation and topography across Lookout Creek watershed. Priority was given to sites with...
Aquatic Vertebrate Population Study in Mack Creek, Andrews Experimental Forest, 1987 to present
Populations of Coastal Cutthroat trout (Oncorhynchus clarkii clarkii) in two standard reaches of Mack Creek in the H.J. Andrews Experimental Forest have been monitored since 1987. Monitoring of Coastal Giant Salamanders, Dicamptodon tenebrosus began in 1993. The two standard reaches are in a section of clearcut forest ...
Plant biomass dynamics following logging, burning, and thinning in Watersheds 6 and 7, Andrews Experimental Forest, 1979 to 2021
Watersheds 6 (WS06) and 7 (WS07) at the HJ Andrews are part of a three-watershed study initiated in the 1970’s to examine the response of hydrology and forest vegetation to logging. In 1974, Watershed 6 was clearcut logged; Watershed 7 was shelterwood cut, leaving 75-100 overstory trees per hectare (comprising about 40...
Multi-locus DNA metabarcoding of western spotted skunk diet in the McKenzie River Ranger District of the Willamette National Forest from 2017-2019
There are increasing concerns about the declining population trends of small mammalian carnivores around the world. Their conservation and management is often challenging due to limited knowledge about their ecology and natural history. To address one of these deficiencies for western spotted skunks (Spilogale gracilis...
Gender and ethnic diversity of members of US university natural resource program external advisory board members, 2017-2022
This dataset contains deidentified demographics information for the members of external advisory boards that serve university natural resource programs. Data collected in 2017 and 2022 represents a sample of land-grant, National Association of University Forestry Program-affiliated, TIMES-ranked universities and colleg...
Stream cross-section profiles in the Andrews Experimental Forest and Hagan Block RNA 1978 to 2011
This database consists of periodically resurveyed cross-section profiles for 5 sites (stream reaches) located in the H.J. Andrews Experimental Forest on 3rd to 5th-order stream channels over the period 1978-present, and also includes historical data from Shorter Creek within the Andrews and two sites (North and South) ...
Plant Pollinator data at HJ Andrews Experimental Forest, 2011 to 2021
Despite the importance of plant-pollinator interactions for ecological communities, few long-term observational studies have been conducted of plant-pollinator networks. This study involves the annual collection of plant-pollinator interaction data from up to 18 meadows in the Willamette National Forest, Oregon, includ...
Plant succession and biomass dynamics following logging and burning in Watersheds 1 and 3, Andrews Experimental Forest, 1962 to Present
Watersheds 1 and 3 in the HJ Andrews Experimental Forest have a long history of hydrologic, geomorphic, and ecological study. Long-term successional studies in the two watersheds are unprecedented in their scope and duration (1962 to present), spanning more than 50 years of post-logging measurements. To date, studies h...
Ecology and restoration of montane meadows at Bunchgrass Ridge near the Andrews Experimental Forest, 1999-2013
In a region dominated by coniferous forests, montane meadows contribute greatly to landscape diversity, wildlife habitat, and other important ecological functions and societal values. Throughout the Pacific Northwest, suppression of fire and changes in climate and grazing pressure have led to rapid succession of meadow...
Hummingbird foraging patterns across alpine meadows with RFID-equipped feeders in the HJ Andrews Experimental Forest, 2014-2017
Landscape changes can alter pollinator movement and foraging patterns which can in turn influence demographic processes of plant populations. In the Cascade Mountains of the Pacific Northwest, USA, forests are encroaching on alpine meadows that harbor diverse plant and pollinator communities. Whether encroachment and i...
Soil moisture and soil properties in Watershed 1 of the HJ Andrews Experimental Forest, 2016–2020
Soil water content was measured at 0–30 cm and 0–60 cm depth at 54 sites within a 10-ha north-facing forested slope of Watershed 1 on 14 dates from August 2016–October 2017. Soil properties were measured at 13 soil moisture sites during the summer of 2017. Soil properties include bulk density, percent sand, percent cla...
Historical Records of the H.J. Andrews Experimental Forest Program, 1947 to present
This database contains historical records of the H.J. Andrews Experimental Forest (a U.S. Forest Service property near Blue River, OR, within the Willamette National Forest) consisting of three parts: 1.) inventory of the physical records and information about locating those physical records and three collections of di...
Aquatic vertebrate populations in streams throughout the HJ Andrews Experimental Forest, 2013 to present
This multi-year study quantifies the distribution and density of aquatic vertebrates throughout Lookout Creek stream network, including Mack, McRae and Upper Lookout Creeks. We are examining how predictable and consistent the densities and sizes of cutthroat trout and coastal giant salamanders are throughout the networ...
Measurement differences between air temperature instruments used at H.J. Andrews meteorological stations
The PRIMET Horizontal Radiation Shield Comparison (PHRSC) experiment compares the difference between the air temperature measurements of a reference temperature sensor inside a fan aspirated radiation shield and temperature sensors located inside passively aspirated radiation shields including a cotton region shelter, ...
Oxygen-18 isotope ratios, chemistry, and tracers in storm water from WS10 hillslope experiment in the HJ Andrews Experimental Forest, 2001-2003
Oxygen-18 ratios, expressed as Delta-18O or D18O (parts per hundred), measured in WS10 discharge and WS10 precipitation. The time series spans from January 2001 to February 2003, period during which precipitation and streamflow were sampled mostly manually and weekly. The time series also includes some periods of highe...
Stream Consumers and Lotic Ecosystem Rates (SCALER) in streams of the HJ Andrews Experimental Forest, 2014-2016
SCALER attempts to address the question of whether small-scale ecological experiments can be applied to understand the behavior of entire ecological systems. Specifically, the role of comsumers to stream functional processes were examined by measurements of structure and function within stream reaches. These results fe...
Ecological Forestry in Western Oregon: A Critical Analysis from Andrews Forest LTER Research, 2014-2015
This work highlights the normative dimensions of “ecological forestry,” a strategy of forest management that uses silviculture to mimic the effects of non-anthropogenic processes of disturbance and succession in order to meet multiple objectives on a single piece of land. An analysis of the arguments made about ecologi...
Vertical tree air temperature measurements within the canopy of the HJ Andrews Experimental Forest, 2011-2019
Vertical air temperature from 11 trees in the Andrews Forest has been collecting beginning in 2011. The trees are at a variety of elevations and are of various species and ages. The 11 trees were selected form the H.J Andrews phenology study air temperature network (MS045). This study examines air temperatures at multi...
Western columbine genetics across HJ Andrews Experimental Forest meadow communities
Woody plant encroachment is diminishing meadow and grassland habitat on a global scale. Increased woody cover influences local conditions such as light/shade environments, local soil characteristics, understory plant community structure, and disturbance regimes. Woody encroachment may also affect landscape-scale biolog...
Oral history transcripts from the H.J. Andrews Experimental Forest Program, 1996 to 2018
Oral history interviews have been conducted over the last two decades with members of the Andrews Forest community who provided valuable historical information about the program and related issues. On the occasion of the 50th anniversary of the experimental forest (1998), history professor Max Geier (Western Oregon Uni...
Annual bedload accumulation from sediment basin surveys in small gauged watersheds in the Andrews Experimental Forest, 1957 to present
Sediment debris basins are established within the Andrews Experimental Forest as part of paired watershed experiments examining differences in streamflow and nutrient chemistry due to timber harvest. Basins are constructed below the stream gaging station in each of five basins, and these basins and the deposits of sedi...
Aquatic and terrestrial insect activity phenology with trap collections at the Andrews Experimental Forest, 2009-2014
This study was designed to evaluate the influence of microclimatic heterogeneity, associated with complex terrain, on phenology and to evaluate potential trophic responses to scenarios of climate change, disturbance and land use. We focus on a simplified model trophic system involving vascular plants, terrestrial and a...
Periodic stream temperature data (1957-1983) in the Andrews Experimental Forest
Weekly maximum and minimum water temperatures were recorded at the gaging stations on three small watershed (Watersheds 1, 2, and 3) in the Andrews Experimental Forest from 1959 through 1966. The period from 1959 to 1962 represents before-logging conditions. Watershed 2, which remained undisturbed through this period, ...
Stream and air temperature data from stream network in the Andrews Experimental Forest, 1997-2001
This study examines stream temperatures and associated air temperatures at multiple sites in stream networks within the Andrews Experimental Forest. Stream temperature sensors were placed at matched elevations in the main headwater streams of Lookout Creek, Mack Creek and McRae Creek as well as above and below major co...
Precipitation chemistry concentrations and fluxes, HJ Andrews Experimental Forest, 1969 to present
Collection and analyses of precipitation chemistry were initiated in 1969 at the low-elevation Primary Met site, and in 1973 at a mid-elevation Hi-15 site. Rain collection samples accumulate from one week to three weeks in bulk and NADP type collectors and then are transported to Cooperative Chemical Analytical Laborat...
Post-logging community structure and biomass accumulation in Watershed 10, Andrews Experimental Forest , 1974 to present
Old-growth and mature Douglas-fir forest were clearcut logged in 1975. Large slash was removed from the site rather than burned. Douglas-fir seedlings were planted in 1976 and 1977, but due to poor survival 4.9 ha were replanted in 1978. Despite planting, most tree stems originated naturally, either as sprouts from cut...
Respiration in soils collected from the REU synoptic sample grid in the Andrews Experimental Forest, 1994-1995
The 1993 (SP005) sampling grid was expanded to 183 sites providing a more comprehensive sampling grid. Because of potential edge effects problems, all sample locations were moved at least 20 meters from the closest road or clearing. Changes from the original location are given in entity 2. CO is measured over a period ...
Effects of topography on soil characteristics in the Andrews Experimental Forest, 1998
This is the third and final data set in a series of basin-scale summer forest soil surveys. We conducted soil survey in 1998 designed to provide an accurate assessment of soil properties over the entire H.J. Andrews Experimental Forest. This dataset represents the results of that effort. Since the 1994 survey, we chang...
Soils synoptic sampling grid (REU sites) site locations, Andrews Experimental Forest, 1993-2005
Soils synoptic sampling grid (REU sites) site locations at the Andrews Experimental Forest are mapped. GPS coordinates were used to generate sample locations from a synoptic soil sampling performed by students as part the Research Experience for Undergraduates(REU) program.
Streamside mosses at the Andrews Experimental Forest, 1994
This data set describes basic description of bryophyte communities in riparian forests, relations between community patterns and major environmental gradients, and compares the local microsite factors with site level influences.
Riparian controls on light availability, primary producers, invertebrates, fish and salamanders in streams in and near the Andrews Experimental Forest, 2014-2018
The goal of this data collection effort was to determine how the age, stage, and structure of the riparian forest relates to stream primary producers and stream biota. Data were collected on stream habitat, benthic algal, biota (fish, salamanders and macroinvertebrates), and riparian forest cover across a total of 9 st...
Headwater Stream Macroinvertebrates of the H.J. Andrews Experimental Forest, Oregon, 2003-2004
Recent studies of headwater streams have demonstrated their importance to overall watershed biodiversity, nutrient cycling, and energy flux. However, little attention has been paid to long-term effects of forest harvest on macroinvertebrate communities in headwater streams. This study investigated headwater stream macr...
Influences on charitable giving for conservation: Online survey data of 1,331 respondents across the US, August 2017
This dataset records survey data collected from an online panel of 1,331 anonymous, nationwide U.S respondents. Data collection was both initiated and completed in August 2017. Survey data is of two major types. The first type, information about respondents, includes (1) select background and demographic information; (...
Coarse woody debris density and nutrient data across western USA, including HJ Andrews Experimental Forest, North Carolina, USA, Mexico and Russia 1982-2001
This data set is used to document the changes in external characteristics, density, nutrient content, and form of carbon associated with various decay classes and ages of logs and snags. The pieces that have been dated form the basis for a chronosequence. All the pieces sampled are used to define the characteristics of...
Fine wood decay studies across western USA, North Carolina, USA, Mexico and Russia, 1989 to 2015
This study was established to examine the loss of mass and changes in nutrient content of fine woody debris in various ecosystems. Also examined was the effect of piece size, position (aboveground, belowground, or suspended), and species on loss of mass over time.
Comparison of terrestrial versus aquatic decomposition rates of logs at the Andrews Experimental Forest, 1985 to 2015
The data collected from this study describe the decomposition of small logs (20-30 cm diameter, 2 m length) in a stream channel to those on an adjacent upland site at the H. J. Andrews Experimental Forest. The stream is a 3rd order above the junction of Lookout Creek and Mack Creek. Three species of trees are being exa...
Long-term log decay experiments at the Andrews Experimental Forest, 1985 to 2185
These data are collected from six sites within the H. J. Experimental Forest and are part of a 200-year experiment on the decomposition of logs in a terrestrial environment. The taxa being examined in the experiment are Douglas-fir, western hemlock, western redcedar, and Pacific silver fir. The data start in 1985 and a...
Uneven Aged Management Project (UAMP), Andrews Experimental Forest
The study consists of 16 treatment units – stands ranging in size from 7 to 11 ha – within the H.J. Andrews Experimental Forest. Each unit is has assigned one of four alternative thinning regimes – unthinned (Control), light thin with patch openings (GAP), light thin (Light) or heavy thin (Heavy),. The stands are to be...
Stream temperature at core phenology stream sites in the Andrews Experimental Forest, 2009 - 2014
The H.J Andrews phenology research included this study of stream temperatures at six headwater streams where springtime emergence of stream macroinvertebrates were collected. Streams were selected across an elevational gradient and with young riparian forests as well as old growth riparian forests. One site was a strea...
Stream and hyporheic carbon dioxide (CO2) measurements in a headwater catchment, Watershed 1, and throughout Lookout Creek watershed at the HJ Andrews Experimental Forest, July 2013 to July 2014
We examined the spatial and temporal variability of stream carbon dioxide (CO2) in a headwater catchment. We measured stream and hyporheic pCO2 at at 30-minute intervals over 11 months in 95.9-ha Watershed 1, HJ Andrews Experimental Forest. We also measured stream temperature, pH and alkalinity which we used to calcula...
Advanced Resolution Canopy FLOw (ARCFLO) experiment employing the SUbcanopy Sonic Anemometer Network (SUSAN) in WS01 of the HJ Andrews Experimental Forest, July-September 2012
This dataset was collected during one of the ARCFLO (Advanced Resolution Canopy FLOw) experiment series’ field campaigns. This field campaign was carried out in WS1 of the HJ Andrews Experimental forest during July-September 2012 by the biomicrometeorology group, PI Christoph Thomas. The ARCFLO experiment series spanne...
Stream, hyporheic, and ground water chemistry of McRae Creek in the Andrews Experimental Forest, 1989 to 1992
Measurements of nitrogen concentrations from grab samples collected from McRae Ck, and from a network of shallow wells located adjacent to the stream. All samples were analyzed for NO3 and NH4. Some samples include additional data such as DON and Total N, and sometimes temperature and dissolved oxygen concentrations we...
Stream tracer experiments to assess channel and hyporheic residence times of streams in the Andrews Experimental Forest in 2001 & 2002
Time series of tracer (Rhodamine WT) concentration data representing a "break-through curve" resulting from a stream tracer injection. Stream tracer experiments were conducted in the lower reach of 2nd-order Watershed 3 in April, 2001, and 2 adjacent reaches of 4th-order Lookout Creek in July, 2002. Rhodamine WT dye wa...
Decomposition of Fine Woody Roots: a Time Series Approach, 1995 to 2006
We examined the effects of species, initial substrate quality, and site differences on woody root decomposition and its nitrogen dynamics in Sitka spruce (Picea sitchensis), Douglas-fir (Pseudotsuga menziesii), and ponderosa pine (Pinus ponderosa) dominated forests in Oregon, U.S.A. using a time series approach. Roots ...
A chronosequence of woody root decomposition in the Pacific Northwest, 1995 to 1997
Decomposition of woody roots in Sitka spruce (Picea sitchensis (Bong.) Carrière), Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco), and ponderosa pine (Pinus ponderosa P. Laws. ex C. Laws.) dominated forests in Oregon, U.S.A. was studied using a chronosequence. Roots of five coniferous species were excavated from stu...
Fine woody debris inventory data from reference stands and inventory plots in the Pacific Northwest, 1992 to 2000
These data provide an inventory of the mass of downed fine woody debris stored within various forest types. This data is used to determine total organic matter, carbon, and nutrient stores in forests.
Stream stage and water table elevation in hyporheic and ground water from McRae Ck well network, Andrews Experimental Forest, 1989-1993
Measurements of stream stage of McRae Ck and water table heights from a network of shallow wells located adjacent to the stream. Data were collected from September 1989 to September 1992 on an irregular basis to sample both baseflow periods and storm events across seasons of the year. Stage height was read from staff p...
Arts and humanities in the LTER Network: understanding extent, values, and challenges by assessing the relevance of empathy in the LTER Network, 2013-2014
The Long-term Ecological Research (LTER) Network is a collection of 25 National Science Foundation-funded sites committed to long-term, place-based investigation of the natural world. While activities primarily focus on ecological research, arts and humanities inquiry emerged in 2002 and since then a substantial body o...
H.J. Andrews Forest Discovery Trail: An interpretation of place based on curriculum of interpretive learning trail and field trip support, 2016
The H.J. Andrews Experimental Forest (HJA) in the Oregon Cascades is one of 24 sites in the Long-Term Ecological Research (LTER) Network. It supports research on forests, streams, and watersheds, and fosters collaborations between ecosystem science, education, natural resource management, and the humanities. The site c...
The relationship between early succession rates and soil properties in the Andrews Experimental Forest, 1999-2000
This study represents only one portion of a much larger study involving a wide range of disciplines and several H.J. Andrews Forest researchers. This dataset represents all the soils data collected up through the summer of 1999. In addition, Steve Acker conducted surveys of vegetation and measuring tree growth using co...
Carbon Dynamics in the Hyporheic Zone of a Headwater Mountain Stream in the Cascade Mountains, Oregon – Watershed 1 at HJA – June 2013 to March 2014
This study investigated carbon dynamics in the hyporheic zone of a steep, forested catchment in the Cascade Mountains of western Oregon, USA. Water samples were collected monthly from a headwater stream and well network during baseflow conditions from July to December 2013 and again in March 2014. We also sampled durin...
Nutrient Concentrations of Vegetation in Small Watersheds at H. J. Andrews Experimental Forest, 2005 to 2006
Past research at the H. J. Andrews Experimental Forest has often occurred at different study locations at different times making comparisons between sites difficult. The small watersheds at the Andrews Forest have been the most extensively studied areas at this research forest and this database is intended to provide c...
Nitrogen fixation and respiration potential of conifer logs at Andrews Experimental Forest, 1987 to 2006
These data provide a time series of changes in nitrogen fixation rates, and respiration rates for four common PNW species. The purpose is to understand when these rates reach a maximum.
LTER Intersite Fine Litter Decomposition Experiment (LIDET), 1990 to 2002
The primary objective of this study is to examine the control that substrate quality and climate have on patterns of long-term decomposition and nitrogen accumulation in above- and below-ground fine litter. Of particular interest will be to examine the degree these two factors control the formation of stable organic ma...
Dimensions, cover, volumes, mass and nutrient stores of Coarse Woody Debris (bark and wood from logs, snags, and stumps) from forests plots in the western United States and Mexico, 1977 to 2005
These data provide an inventory of the mass and nutrients stored within various forest types by coarse woody debris (CWD). CWD inventoried includes standing dead trees (greater than 10 cm diameter at breast height) and dead and downed wood (greater than 10 cm large end and >1 long). The majority of measurements are fro...
Dendrochronology study of fire history, Andrews Experimental Forest and central western Cascades, Oregon, 1482-1952
Fire history is documented for an 11,000 hectare (27,110 acre) area in the western Oregon Cascades , including H. J. Andrews Experimental Forest. Fire scar and tree origin data were collected mainly from stumps at 359 sites. Thirty-five fire events are mapped from 1482 to 1952. Mean fire return intervals are derived fr...
LiDAR data (August 2008) for the Andrews Experimental Forest and Willamette National Forest study areas
Watershed Sciences, Inc. collected Light Detection and Ranging (LiDAR) data from HJ Andrews and the Willamette National Forest (WNF) on August 10-11, 2008. Total area of the study are is 17,705 acres. The total area of delivered LiDAR including 100 m buffer is 19,493 acres. This data set includes the base products deli...
LiDAR data (October 2011) for the Upper Blue River Watershed, Willamette National Forest
Watershed Sciences, Inc. (WSI) collected Light Detection and Ranging (LiDAR) data on October 27th, 28th and November 1st, 2011 for the United States Forest Service and Environmental Protection Agency. This study includes bare-earth, highest hit, vegetation height, and intensity grids. The raw point cloud data is availa...
Post-fire succession study, Torrey Charlton RNA, 1997 to present
The fire that consumed a good deal of the Torrey-Charlton RNA in August of 1996 provided a unique opportunity to observe natural, post-fire vegetation dynamics in high elevation forest. We were able to take advantage of permanent plots in the RNA, established in 1976. The plots encompass a range of fire severity from u...
Archival records of fire history, 1910-1977, central western Cascades, Oregon
Historical wild fire records for the central western Cascades of Oregon are summarized here for the period from 1910 to 1977. Data records are obtained and summarized from historical statistical reports that were generated by the U.S. Forest Service and exist in various forms including fire maps, summary tables, and in...
Ecohydrology and Ecophysiology intensively measured plots in Watershed 1, Andrews Experimental Forest, 2005-2011
This database was developed to store data for ecophysiology and ecohydrology studies in Watershed 01 (WS01) at the H.J. Andrews Experimental Forest. The data include a combination of continuous sensor measurements (e.g. for soil moisture, soil temperature, air temperature, and relative humidity data) and repeated sampl...
Age structure, developmental pathways, and fire regime characterization of Douglas-fir/western hemlock forests in the central western Cascades of Oregon
These data are the raw forest stand- and age-structure data from 124 stands in the central western Cascades of Oregon used to construct a conceptual model of stand development under the mixed-severity fire regime that has operated extensively in this region.
Throughfall and Isotopic Ratios on WS1 at the Andrews Experimental Forest, 2010-2011
The data in this set describes the throughfall collection on WS1 during 2010 and 2011, as well as the isotopic data assessed from these samples. In the Fall of 2010 there were eleven collection periods and in the Spring of 2011 there were eight collection periods. Data is no longer being collected. Throughfall and rain...
Stream network from 1997 survey and 2008 LiDAR flight, Andrews Experimental Forest
HJ Andrews stream network from 1994 base prepared from Lienkaemper's 1976 stream survey field data and contours generated from GSC Digital Elevation Model (DEM) maps, and generated from 2008 LiDAR 1 meter bare earth DEM. The 1994 base matches the 30 and 10 meter DEMs and the 2008 LiDAR version matches the LiDAR base la...
Average monthly and annual precipitation spatial grids. (1971-2000 and 1980-1989), Andrews Experimental Forest
These files are spatially gridded precipitation of average monthly and annual precipitation for the climatological periods 1971-2000 and 1980-89, Andrews Experimental Forest. The original 1980-89 grids were updated for a greater time span and also the extent of the coverage is increased. Interpolation of point station ...
Dendrometer studies for stand volume and height measurements of trees of the western US, 1976 to 1993
Dendrometry is used to get an accurate estimate of volume and height for individual trees. Volume tables or regressions may be generated. This method accurately accounts for taper by measuring at consecutive points up the bole.
Radiation spatial grids, Andrews Experimental Forest, 1995-2000
This database contains 50m gridded mean monthly radiation data over the HJ Andrews. The IPW (Image Processing Workbench) model was used to create the grids with parameters specified by the user to approximate climatic conditions at the HJ Andrews. Cloudiness was accounted for by varying proportions of direct and diffus...
Coarse woody debris volume and mass from line transect inventory from reference stands and inventory plots of the Pacific Northwest, 1997 to 2005
These data can be used to provide an inventory of the volume of coarse woody debris stored in forests.
Mass of forest floor litter from cores in reference stands and inventory plots in the Pacific Northwest, 1992 to 2003
These data provide an inventory of the mass of forest floor organic matter stored within various forest types. This data is used to determine total organic matter, carbon, and nutrient stores in forests.
Mean monthly maximum and minimum air temperature spatial grids (1971-2000), Andrews Experimental Forest
Mean monthly maximum and minimum air temperature spatial grids (1971-2000), adjusted for the effects of solar radiation and sky view factors, Andrews Experimental Forest. Maps were created using PRISM (Parameter-elevation Regressions on Independent Slopes Model), developed by Dr. Christopher Daly at Oregon State Univer...
Respiration patterns of logs in the Pacific Northwest, 1986-1996
To examine the seasonal and successional patterns of respiration losses for four species (Abies amabilis, Pseudotsuga menziesii, Thuja plicata, Tsuga heterophylla), and two positions (top and side). Periodically this set of logs is examined for respirations rates.
Spot fire locations (1991, 2013, 2015), Andrews Experimental Forest
1991, 2013, and 2015 Spot Fire Locations for the HJ Andrews Experimental Forest. This data documents the locations of small fires on the Andrews. There is little additional information about the fires and suppression efforts.
Examining Visitor Perspectives about HJA Day: Frequency Report November 2014
Pre- and post-HJA Day surveys were designed to help understand visitor experiences and thoughts about HJA Day 2014. A combined total of 136 individuals registered for HJA Day 2014. Registrants were requested to complete both pre- and post-HJA Day surveys either in person or online. Of these, 76 registrants completed ea...
Lotic Intersite Nitrogen eXperiment II (LINX II): a cross-site study of the effects of anthropogenic land use change on nitrate uptake and retention in 72 streams across 8 different biomes (2003 – 2006).
The LINX II (Lotic Intersite Nitrogen eXperiment) project was designed to quantify the rates and mechanisms of nitrate retention in streams using stable isotope tracer additions. The study encompassed 72 stream reaches spread across 8 North American biomes. Within each biome, 9 streams were selected in three watershed ...
Vegetation classification, Andrews Experimental Forest and vicinity (1988,1993,1996,1997,2002, 2008)
This data set includes vegetation classifications from the Willamette National Forest (years 1993, 1996, 1997, 2002, and 2008) and from 1988 thematic mapper satellite image.
Pacific Northwest Plant Biomass Component Equation Library
This database contains a collection of regression equations to predict various biomass components for many plants of the Pacific Northwest based on common parameters such as diameter, height, and cover. Documentation, including sources of raw data and source publications, is provided for each equation.
Aboveground Live Biomass (2008), Andrews Experimental Forest
The biomass raster was developed by equations in (Seidl, et al 2012). Lidar variables used to create the raster include 95th percentile height, bare earth elevation, and the standard deviation of height in a 35m moving window. Watershed Sciences, Inc. (WS) collected Light Detection and Ranging (LiDAR) data from HJ Andr...
Forest metrics derived from the 2008 Lidar point clouds, includes canopy closure, percentile height, and stem mapping for the Andrews Experimental Forest.
There are three types of forest metrics within this database. They all are derived from the raw Lidar point clouds using the FUSION software. The three types are canopy closure, height metric, and stem mapping. The canopy closure and height metric grids cover a variety of canopy heights and grid cell sizes. 1. Canopy c...
Landcover change analysis of the McKenzie Basin for the Maps and Locals (MALS) project.
This dataset was developed for use in an analysis of landcover change in the McKenzie Basin for the Maps and Locals (MALS) project. MALs is funded by LTER Social Science Supplement grants of the National Science Foundation.
Record of Public Communications at the HJ Andrews Experimental Forest (1980-2002)
Public communications of the H.J. Andrews Experimental Forest were compiled and examined to provide basic information on the outreach program from the Andrews Forest, including the Long-Term Ecological Research (LTER) program. This compiled record provides a listing, brief summary, keywords, and analysis of the record ...
Disturbance legacies and resilience simulation using an individual-based forest landscape model on the Andrews Experimental Forest
Disturbances are key drivers of forest ecosystem dynamics, and forests are well adapted to their natural disturbance regimes. However, as a result of climate change, disturbance frequency is expected to increase in the future in many regions. It is not yet clear how such changes might affect forest ecosystems, and whic...
Land use designations, Andrews Experimental Forest, 1998-2011
Land use designations for the Andrews Experimental Forest including the headquarters site, late successional reserves (LSR) from the Northwest Forest Plan designations, designated control areas, quarry locations, and areas potentially suitable for experiments. The designated control areas and potentially suitable for e...
Transportation network system including trails, road construction history, and gates for the Andrews Experimental Forest, 1952-2011
Transportation network locations within the Andrews Experimental Forest. Includes locations of all the roads, trails, and gates within and around the forest. Original road layer was drawn on maps in 1992 and field validated. The road construction history (1952-1990) has been captured as an attribute. Roads were updated...
Stream nutrient sampling during winter baseflow conditions in the Andrews Forest and Willamette River Basin, February 2009
To better understand the impact of land use on stream nutrient export, a synoptic sampling of streams draining 57 sub-basins within the Willamette River basin was conducted during winter baseflow conditions. The objective of the study was to assess how streamwater values of stream dissolved organic carbon (DOC), NO3- a...
Plant community typing (2009 update), Andrews Experimental Forest
Plant Communities of the HJ Andrews Experimental Forest (revised 2009). A total of 23 forest communities have been identified and characterized in a preliminary manner. Data used in formatting the classification had previously been collected on 300 reconnaissance plots located on the H. J. Andrews Forest and surroundin...
Role of vegetation and coarse wood debris on soil processes and mycorrhizal mat distribution patterns at the Hi-15, Andrews Experimental Forest, 1994-1995
The main objective of this study was to determine if there were relationships between forest floor attributes such as the location of: (1) individual trees, (2) clusters of undergrowth vegetation, (3) coarse woody debris, (4) rocks and (5) topography and both soil characteristics and distribution patterns of ectomycorr...
Adminstrative boundary, Andrews Experimental Forest, 1997 survey, 2009 update
This database contains the spatial representations for the administrative boundary of the HJ Andrews Experimental Forest. This database was derived from ground based surveys of the Andrews in 1997, based on the Experimental Forest Establishment report. Field personnel determined ridge tops. The original data was update...
Epiphytic macrolichens in relation to forest management and topography in a western Oregon watershed, 1997-1999
Epiphytic macrolichen communities were sampled in 117 coniferous stands in Blue River watershed of western Oregon. Stands were sampled across various stand types defined by stand structure, according to age classes of the younger tree cohort and remnant tree retention. Remnant trees were those in an older cohort that r...
Mycorrhizal belowground fungi species list of the Andrews Experimental Forest, 1992 to 1994
A study of fungal diversity in the H.J. Experimental Forest. Hypogeous fungi depend on particular plant species and habitat conditions for survival. Data on species diversity and sporocarp production were collected for 4 years and compared among young, rotation-age, and old Douglas-fir stands. The species list presente...
Spatial and temporal distribution and abundance of butterflies in the Andrews Experimental Forest, 1994-1996
This database contains information on species abundance according to date and location within the H.J. Andrews Experimental Forest Lookout Creek watershed. The database provides the information needed to assess patterns in the abundance of butterflies across time and space. The distribution and abundance of butterfly s...
Aquatic insect sampling in Lookout Creek at the H.J. Andrews Experimental Forest, 2001
The database contains data from samples collected during the summer of 2001 on aquatic macroinvertebrates along Lookout Creek. Three data tables comprise the database. The two larger tables contain the taxonomic composition and abundances from samples collected using small (0.25m ) emergence traps and pan traps (0.19m)...
Landslide inventory (1953-1996), Andrews Experimental Forest and Blue River Basin
Landslide inventory (1953-1996), Andrews Experimental Forest and Blue River Basin. This layer is a combination of data from four landslide inventory efforts that have been conducted in the area beginning in the late 1960's. Data represent landslide occurrences between 1953 and 1996. Data are in the UTM coordinate syste...
Macroinvertebrate species list of the Andrews Experimental Forest, 1992
Total taxa richness, proportion of Ephemeroptera, Plecoptera, and Trichoptera, Shannon diversity, alpha diversity, proportion represented by the most dominant taxon, and total abundance of individuals where macroinvertebrate assemblage measures used to evaluate the effects of sampling replication and distribution in tw...
Invertebrates of the Andrews Experimental Forest: An annotated list of insects and other arthropods, 1971 to 2002
This publication is not a pro forma species list; rather, it has been generated as the result of diverse ecological studies centered on and around the Andrews Forest beginning in 1971. No attempt has been made to exhaustively collect the area with methodologies appropriate to each invertebrate group. This list provides...
Vascular plant list on the Andrews Experimental Forest and nearby Research Natural Areas, 1958 to 1979
This list compiles all plant taxa which have been encountered in the the H.J. Andrews Experimental Forest, the 6000-hectare Lookout Creek drainage in the western Oregon Cascades. Habitat and abundance are described for most taxa.
Bird species list for the Andrews Experimental Forest and Upper McKenzie River Basin, 1975 to 1995
This list quantifies bird species and indicates general abundance and habitat. The list covers the entire upper McKenzie River watershed with special reference to occurrence within the Andrews Forest. It represents the collective observations of many people over 20-plus years, but should not be viewed as either current...
Amphibian and reptile list of the Andrews Experimental Forest, 1975 to 1995
This is a compilation of amphibian and reptile species currently known to be present within the H.J. Andrews Experimental Forest. This list includes scientific name, common name, relative abundance, general elevational distribution, habitat, and references for each species.
Mammal species list of the Andrews Experimental Forest, 1971 to 1976
This is a compilation of mammal species currently known to be present within the H.J. Andrews Experimental Forest. This list includes scientific name, common name, relative abundance, general elevational distribution, and habitat for each species.
Riparian bryophyte list of the Andrews Experimental Forest, 1994/1995
The following bryophyte species list compiles habitat information based on the quantitative data collected from 360 samples (2 x 4 m quadrats) distributed among 42 sites within the Andrews Forest. The sites range from 420 m to 1250 m asl stream orders 1 to 5. The list comprises 131 taxa, 84 mosses and 47 hepatics. Many...
Epiphyte species list of Watershed 10, Andrews Experimental Forest, 1970 to 1972
Using direct-aid climbing techniques for sampling trunks and branch systems, we found 74 species of lichens and 32 species of bryophytes growing as epiphytes in a 450-year-old Douglas-fir forest in western Oregon. This data is based on sampling designed to provide estimates of epiphyte biomass per hectare of forest to ...
Moss species list of the Andrews Experimental Forest, 1991
Understanding patterns of distribution and abundance for individual moss species is necessary for understanding ecosystem structure and function and for ensuring proper management. To augment understanding of the ecology of individual species, mosses were examined on the forest floor, on the upper surface of downed log...
Lichen abundance and biodiversity along a chronosequence from young managed stands to ancient forest, 1993
The diversity of epiphytic lichens in old growth forests has stimulated considerable research (e.g., Howe 1978, Pike et al. 1975; Hoffman and Kazmierski 1969). We possess few data on the lichen communities of younger stands or the manner in which they develop as the forest ages. As our society grapples with the consequ...
Dynamics of large wood in streams: Tagged log inventory, Mack Creek, Andrews Experimental Forest, 1985 to 2008
Although many studies have identified the characteristics of wood stored in streams, few have attempted to measure the long-term dynamics of large wood. From 1982-1985, we developed a long-term study of input, storage, decomposition, and redistribution of large wood in Mack Creek. Each year from 1985 to the present, we...
Synoptic soil respiration of permanent forest sites in the Andrews Experimental Forest (1993 REU Study)
To examine soil respiration as influenced by temperature and moisture to determine the role of CO2 evolution rates in overall carbon dynamics.
Chemical and microbiological properties of soils in the Andrews Experimental Forest (1994 REU Study)
To conduct a comprehensive study of soil chemical and microbiological properties at the HJA during the week of July 11,1994.
Disturbance effects on soil processes in the Andrews Experimental Forest (1995 Stand Age Study)
This study was designed to determine how edges generated by clear-cutting old-growth forests influence patterns of soil carbon and nitrogen cycling and the distribution of ectomycorrhizal mats and to determine how these patterns change with time after harvest. A secondary objective was to measure how clear-cutting with...
Effect of thinning pole stands on soil processes in southern Oregon, central Coast Range, and central western Cascades of Oregon (1994-1995 BLM Study)
This study was conducted in different regions to determine if climatic regimes alter the effects of thinning pole stands. Forest managers are currently faced with increasingly complex demands in designing sulvicultural approaches that fulfill the need to maintain and in some cases, enhance forest health. As mature and ...
Spatial and temporal distribution and abundance of moths in the Andrews Experimental Forest, 1994 to 2008
The distribution and abundance of macromoth species is strongly influenced by geographical (region-neighboring plots) scale, elevation, aspect, plant community, management regime, and time of year. Noctural macromoths have been observed at a total of 263 sample sites throughout the Andrews Forest watershed since 1994. ...
Soil Moisture and vegetation cover patterns after logging and burning an old-growth Douglas-fir forest in the Andrews Experimental Forest, 1960-1983
This soil moisture study was initiated in 1960 to investigate the effects of patch clearcut logging and slash burning (1962-63) in an old-growth Douglas-fir forest in the Oregon Cascade Range. Since soil moisture and vegetation sampling continued regularly until 1980, this is a unique data set that represents nearly tw...
Seasonal relationships between soil respiration and water-extractable carbon as influenced by soil temperature and moisture in forest soils of the Andrews Experimental Forest, 1992-1993
The overall objective of this study is to model trace gas emissions from forest soils of the H. J. Andrews Experimental Forest. This is to be accomplished by studying trace gas emissions and related variable at a set of 20 permanent plots at the HJA.
Fire history dendrochronology study, super old growth data, central western Cascades, Oregon, 2002
The primary objectives of this study were to assay where super old-growth (SOG) persists on the landscape, what factors enabled it to survive for more than 550 years, and to develop a predictive model for the occurrence of SOG. To meet these objectives, data were synthesized from prior fire history work done in the cen...
Potential rapidly moving landslide hazards in Western Oregon, clipped to Andrews Experimental Forest, 1999 to 2002
Landslides are a serious geologic hazard, threatening public safety, natural resources, and infrastructure, and costing millions of dollars for repairs each year in Oregon. This map of areas where rapidly moving landslides pose hazards in western Oregon is part of the State's attempt to protect lives and property. The ...
Fire history reconstruction (1482 - 1952), Andrews Experimental Forest and vicinity
Fire History - H J Andrews and Vicinity (1482 - 1952) individual fires and fire frequency. Fire history studies by Peter Teensma provide the base information for this layer. Individual fire episodes were manuscripted onto HJA base maps and digitized. Fire episodes were maintained in thirty one separate polygon coverage...
Nutrient and microbial characteristics of mountain stream fine benthic organic matter in the H.J. Andrews Experimental Forest, 1995 to 1996
Numerous studies have examined qualitative shifts in leaf litter composition in the early to middle stages of decomposition. (Suberkropp, Godshalk and Klug 1976, Petersen and Cummins 1974, Findlay and Arsuffi 1989) which have shown that changes in leaf species and composition lead to marked differences in microbial pro...
Fire history database of the western United States, 1994
To create a database of existing published and unpublished tree-ring reconstructions of fire regimes in forested areas, before circa 1900, west of 100 W longitude in the continental United States, exclusive of Alaska. The studies included in the database are restricted to tree-ring reconstructions of fire history and t...
Fine woody detritus volume and mass in small watersheds at Andrews Experimental Forest, 2002 to 2003
Four small watersheds (WS06, WS07, WS08, and WS09) at the Andrews Experimental Forest were inventoried for fine woody detritus (FWD) using the line transect method as described in Guidelines for measurements of woody detritus in forest ecosystems (Harmon and Sexton 1996). In each watershed plot, four transects of 4 met...
A Study of Hyporheic Characteristics Along a Longitudinal Profile of Lookout Creek, Oregon, 2003
Time series of tracer (Rhodamine WT) concentration data representing a "break-through curve" resulting from a single, multi-scale tracer test conducted along the length of Lookout Creek, from its 2nd-order headwaters through its 5th-order main stem. The longitudinal tracer test involved an in-stream injection of Rhodam...
Storm nutrient dynamics at Andrews Experimental Forest stream gages, 2001 to 2003
This study examines headwater stream nutrients at stream gaging sites during selected storms in the Andrews Experimental Forest. High frequency storm sampling was conducted to examine flow path dynamics, basin characteristics, seasonal trends, and differing responses and mobility among analytes on streamwater nutrient ...
Soil respiration associated with ectomycorrhizal mats in an old-growth stand along lower Lookout Creek, HJ Andrews Experimental Forest (2008-2009)
Comparisons of respiration rate and environmental variables for mat and non-mat soil were conducted between July 2008 to Nov 2009 in a 0.1ha plot adjacent lower Lookout Creek, approximately 700m downstream from Lookout Camp (44 deg 13”25’N, 122 deg 15”30’W, 484m above sea level). The predominant overstory species are P...
Vertebrate-habitat relationships: Logistic regression models predict probability of occurrence of bird and small mammal species in western Oregon, 1998-1999
Logistic regression models predicting probability of occurrence of bird and of small-mammal species were produced using animal-habitat data sets from throughout western Oregon (Garman and Cole 1999 - Vertebrate Habitat Relationships Data Bank (VHRDB), Report to Coastal Landscape Analysis and Modeling Study). Regression...
Annual tree productivity in permanent plots within the H.J. Andrews Experimental Forest, 2000-2004
Tree cores were taken from trees in permanent plots within the H.J. Andrews Experimental Forest to estimate annual bole biomass increment. The purpose of measuring this was to determine how many trees need to be sampled within a stand in order to determine NPP accurately. Increment cores were extracted from all trees g...
Dendrochronology study of fire history, Blue River watershed, Oregon, 1475 to 1996
Fire history and fire regimes were reconstructed for a 450 square meter area in the central western Cascades using tree-ring analysis of fire scars and tree origin years at 137 sampled clearcuts. Temporal patterns of fire frequency, severity, and size, and interpreted topographic influences on fire frequency are descri...
Conversion factors to predict the volume of the tree bole that is converted to forest products in the Pacific Northwest (1993)
The primary objective of this study is to predict the volume of the tree bole that is converted to forest products with a long-term lifespan (greater than 5 years). This information is used in a model that assesses the fate of carbon from harvested forest stands.
Soil solution chemistry in Detrital Input and Removal Treatments (DIRT) from the Andrews Experimental Forest, 1999-2019
The Detrital Input and Removal Treatment (DIRT) Project was established to assess how rates and sources of plant litter inputs influence accumulations or losses of organic matter in forest soils. DIRT employs chronic additions and exclusions of aboveground litter inputs and exclusion of root ingrowth to permanent plots...
Decay in standing trees of the Pacific Northwest, 1982-1992
The primary objective of this study is to predict the volume of the tree bole that is left on the site during a harvest operation. This data is needed to predict the amount of woody detritus left on a site after harvest. This in turn is used to predict how carbon stores change during succession.
Radial thickness of structural-anatomical components of woody plant parts, 1985-2005
Measurement data is provided for the radial thickness of various tissue types in wood of varying diameters. These data can be used to create equations to predict the fraction of trees comprised of outer bark, inner bark, sapwood, and heartwood.
Comparison of arthropod densities on young-growth and old-growth foliage in the Andrews Experimental Forest, 1986
To compare invertebrate densitiy, diversity, and functional groups representation between old-growth and young-growth forests.
Ground-dwelling vertebrates, birds, habitat data on the Willamette National Forest, Oregon (Young Stand Thinning and Diversity Study), 1991-2012
The US Forest Service (USFS), Pacific Northwest Research Station (PNW), and Oregon State University (OSU) established the Young Stand Thinning and Diversity Study (YSTDS) in 1990 to demonstrate and test options for young stand management in western Oregon. The YSTDS is designed to determine if different thinning, under...
Road-related erosion from the February 1996 flood in the Lookout Creek and Blue River watersheds, Oregon
Studies of the effects of forest roads on mountain watersheds (e.g. Jones and Grant 1996; Wemple et al. 1996) led to asking how sedimentation processes were affected by roads during the flood of February, 1996. Of interest were how roads influenced erosional processes and how flood-induced erosion affected the transpor...
Coarse woody debris, amount and distribution of in Lookout Creek, Andrews Experimental Forest 1991
These data describe the amount and distribution of coarse woody debris on the valley floor of the mainstem of Lookout Creek and characterizing it in relation to river morphology. Data include the number, volume, location, orientation, decay class, and pool formation roles of large wood debris pieces. River morphology i...
Landslide chronosequence: Tree, site and vegetation factors in the Andrews Experimental Forest, 1981
To examine vegetation development on landslides by sampling a chronosequence of landslides 6-28 years old; to determine species that successfully revegetate landslides, and determine whether species composition changes with landslide age.
Longitudinal profiles and geomorphic descriptions of twelve randomly selected stream reaches in the Andrews Experimental Forest, 2000-2001
The dataset provides surveyed longitudinal elevation profiles of the water surface along the center-line of twelve randomly selected study reaches located in the Lookout Creek basin at the H.J. Andrews Experimental Forest in the western Cascades Mountains of Oregon. Streams were surveyed with an engineers level and sta...
The effects of debris flows on stream fine benthic organic matter (FBOM), characteristics, 1996
The biochemical characteristics of fine benthic organic matter (FBOM) were studied in 14 stream reaches. Half of these low-order mountain stream reaches had experienced significant debris flow events during server winter storms and half did not.
Benthic algal species list of the Andrews Experimental Forest, 1991/1992
This is a compilation of benthic algal species currently known to be present within the H.J. Andrews Experimental Forest.
Aquatic Invertebrate species list of Lookout Creek in the Andrews Experimental Forest, 1988
A survey of aquatic invertebrates in Lookout Creek at the H.J. Andrews Experimental Forest
Seasonal soil respiration using permanent gas chambers in the Andrews Experimental Forest, 1994-1996
The overall objective of this study is to model CO emissions from forest soils of the H. J. Andrews Experimental Forest. The data to develop this model was obtained by measuring forest floor respiration rates in permanent chambers located along transects at permanent gas flux study sites.
Influence of coniferous tree invasion on forest meadow soil properties on Bunch Grass Ridge and Deer Creek near the Andrews Experimental Forest, 1998
Measurements were made along transects running from mountain meadows, into transition zones where trees were invading meadows and then into mature forest to determine if the invasion of high central Oregon Cascade Mountain meadows by the surrounding forest altered soil properties. Prior studies shown that meadow soil c...
Influence of tree-fall gaps on soil characteristics in gaps of varying sizes in the Andrews Experimental Forest, 1995
This is the first of three tree-fall gap studies conducted at the H.J. Andrews Experimental Forest addressing the effects of tree-fall gaps on forest soil characteristics. The second (Gap2) compared the effects of gaps on soil properties along both N-S and E-W transects to better differentiate between microclimate and ...
Influence of microclimate gradients on soil characteristics within tree-fall gaps in the Andrews Experimental Forest, 1997
This was the second in a series of tree-fall gap studies conducted at the HJA addressing the effects of tree-fall gaps on forest soil characteristics. The first looked at the effects of gap size on changes in soil carbon cycling within the gap along N-S transects. The present study compares the effects of gaps on soil ...
Influence of tree-fall gaps on soil characteristics in the Andrews Experimental Forest, 1999
This is the third and final study in a series of tree-fall gap studies conducted at the HJA addressing the effects of tree-fall gaps on forest soil characteristics. The first looked at the effects of gap size on changes in soil carbon cycling within the gap along N-S transects. The second compared the effects of gaps o...
Chemical and biochemical characteristics of soils along transects in stands with different vegetation and successional characteristics in the Andrews Experimental Forest, 1996
To better understand the effects vegetation has on forest soils, we established a number of sampling transects running from old-growth (OG) forests into stands with different vegetation or transects within different vegetation types without an OG component. Each transect was made up of 75 meter segments in both the OG ...
Association of ectomycorrhizal mats with Pacific yew and other understory trees at the Andrews Experimental Forest and the southern and western Cascades, Oregon, 1992-1994
This study was designed to determine if ectomycorrhizal mats are more likely to be present in soils at the base of common understory trees than in soils distant from trees and to determine if there is a relationship between the occurrence of mats and tree size. The understory trees studied included the Pacific yew (Tax...
Origin of large woody debris in streams in the western Cascades of Oregon and Washington and the Oregon Coast Range, 1981 (Helen McDade thesis)
The objective of this study was to determine the source-distance patterns of coarse woody debris in selected streams flowing through natural conifer forests in the Cascade and Coast mountains of western Oregon and Washington. Several stand and landform conditions were sampled to estimate their effects on source-distanc...
Log leachates from the Andrews Experimental Forest, 1986-1992
This study is part of the long-term log decay study (200 years). The experiments are being conducted at six sites located within intact old-growth Douglas-fir-western hemlock forests. This study tests the effect of log species and decomposition on the release of nutrients and carbon via leaching. This experiment is des...
Moisture content of logs from the Andrews Experimental Forest, 1985-1988
The purpose of this study is to test the effect of log species and decomposition on the moisture content and water stores in logs.
Comparision of native litter species occurring at the Andrews Experimental Forest to LIDET standard species, 1993-2003
The primary objective of this study is to examine the control that substrate quality and climate have on patterns of long-term decomposition and nitrogen accumulation in above- and below-ground fine litter. Of particular interest will be to examine the degree these two factors control the formation of stable organic ma...
Fall directions and breakage of trees along streams in the Pacific Northwest, 2000-2002
This database contains data on patterns of fall and breakage by riparian trees along streams in the Pacific Northwest. Data in these tables were collected from 2000-2002. Two tables are included. (1) site descriptions and (2) tree fall. The site descriptions table contains information on the geographic location (genera...
Litterfall rates in Reference Stand within the Andrews Experimental Forest, 1977-1985
Seasonal and annual rates of litterfall have been sampled at 6 permanent plots picked to represent a range of habitats and elevations. To assess variation in litterfall and decomposition and its role in nutrient cycling across an environmental gradient of moisture and temperature. This study is to be incorporated with ...
A study of selected ecosystem parameters potentially sensitive to air pollutants in the Olympic Peninsula, 1984-1987
To establish rates of ecosystem processes in a near pollutant free environment and measure yearly patterns of variability of these processes. The methodologies used in this study range from standard to untested designs. All procedures are being tested and scrutinized. Our goal is to make suggestions about the kinds of ...
Dynamics of montane and subalpine meadows in the Three Sisters Wilderness Area and Biosphere Reserve, 1981-1993
The Three Sisters Wilderness Area is a Biosphere Reserve that represents the northern half of the Sierra-Cascade Province. It encompasses nearly 100,000 ha of essentially undisturbed landscape straddling the crest of the central Cascade Range, Oregon. Coniferous forests dominate the Three Sisters, although the Wilderne...
Population dynamics of young forest stands as affected by density and nutrient regime in the Andrews Experimental Forest, 1981-1997
To test hypotheses concerning feedback mechamisms (competition and mortality) which effect the dynamics of plant population development. Specifically, to test if manipulation of site quality (through fertilization) or the variance in individual tree leaf area (through pruning) will produce changes in the dominance hier...
Plant biomass dynamics in old-growth Watersheds 8 and 9 at the Andrews Experimental Forest, 2003 to present
On the HJ Andrews Experimental Forest, OR, studies on paired small watersheds compared site productivity for locations with diverse environmental attributes. For study code TP115, Watershed 8 and Watershed 9 were measured in 2003 with a series of 17.82 m radius plots on multiple transects in each watershed. Watershed 8...
Forest structure and biomass in early successional harvest units of the Andrews Experimental Forest (ESSA), 1999 to present
The objectives of this effort were to characterize species presence, cover, and biomass for herbs, shrubs, and tree regeneration, and to quantify tree regeneration by species and size class. The proposed scheme includes the following elements:
Sap flow measurements to estimate overstory water use in Watersheds 1 and 2, Andrews Experimental Forest, 1999-2002
This study investigates how differences in tree age, stand structure and species composition between an old and young Douglas-fir/western hemlock forest impacts overstory transpiration. We measured sap flow (using constant-heat thermal dissipation sensors in g/m) during the growing season in samples of trees in Watersh...
Monitoring small mammal and amphibian abundances on the Willamette National Forest, Oregon (Long-Term Ecosystem Productivity experiment), 1995-1999
Previous descriptive and associative research approaches have identified associations between the amount of coarse woody debris (CWD) and either the occurrence or abundance of certain species of forest floor mammals and amphibians (e.g., Aubry et al. 1988, McComb et al. 1993). Managers are using information such as thi...
Soil descriptions and data for soil profiles in the Andrews Experimental Forest, selected reference stands, Research Natural Areas, and National Parks, 1962 & 1996
Provides standard soil profile descriptions along with physiographic data and classifications. Physical and chemical profile data are included when available.
Road construction history (1952 - 1990), Andrews Experimental Forest
Andrews road construction history is mapped. This data includes the year and 1/2 decade of construction for the road network around the HJ Andrews Experimental Forest. Note that the underlying road network has been revised and updated based on the 2007 LiDAR flight. This road network can be found at GI007: Transportati...
Historic salvage sale locations (1954 - 1974), Andrews Experimental Forest
Historic salvage sale areas (with buffered roads) are reconstructed. Historic salvage timber sales in the H J Andrews from 1954 - 1974 were outlined on a variety of hard copy maps. These manuscripts were digitized into four non-overlapping coverages. Each coverage was turned into a region and the UNION command was used...
Upper Blue River geology clipped to the Andrews Experimental Forest, 1991
Rock units of parts of the Blue River basin (including the Lookout Creek watershed and upper Blue River above the junction with Lookout Creek), were described by several investigators who covered different portions of the basin at different scales. A unit correlation table was developed (see below) and units were manus...
30 meter digital elevation model (DEM) clipped to the Andrews Experimental Forest, 1996
Elevation Model for the HJ Andrews Experimental Forest (30 meter DEM). This dataset includes the raw DEM, and several value added products. The products are contour lines, aspect, percent slope, and a hill shade for relief mapping.
Hydrologic response units (base units for PRMS streamflow model), Andrews Experimental Forest, 1993
Hydrologic Response Units are used as base units for the Precipitation-Runoff Modeling System (PRMS) streamflow model. Created by Alok Sikka as part of landscape runoff modeling.
Flow accumulation grid generated from 10 meter DEM, Andrews Experimental Forest, 1998
Flow accumulation grid generated from 10 meter DEM, Andrews Experimental Forest. This grid is useful for determining the area of land that drains to a point. The user selects a point on the grid, and the value of that point represents the area (in 100 square meters) that drain to the point. This grid can also be used f...
Soil survey (1964, revised in 1994), Andrews Experimental Forest
Soils map of the H J Andrews Exp Forest modified from 1964 soil survey. Joel Nordgen and Ted Dyrness collected additional field data in 1993 and 1994. Joel Nordgen revised the 1964 soils polygon based on these additional data. Ken Vance-Borland revised the original GIS soils layer based on Joel's interpretation, elevat...
Log decomposition and nutrient release study site locations for 200 yr experiment, Andrews Experimental Forest, 1985
Site locations for the long-term decomposition experiment that was established at the HJ Andrews Experimental Forest in 1985. The duration of the study is anticipated to be 200 years.
Mycorrhizal map sampling data in different age class plots of Douglas-fir forests, Andrews Experimental Forest, 1992-2005
Ectomycorrhizal mats in forest soils have a wide global distribution and are apparently important to nutrient cycling. Since little known about the factors influencing their distribution we have conducted one of the first studies attempting to define the factors influencing mat distribution. We chose to study distribut...
Vegetation history classification for Watersheds 1, 2, and 3, Andrews Experimental Forest, 1959-1990
The objective of this study was to create GIS layers depicting vegetation cover over the history of the small experimental watersheds (WS 1, 2, and 3) based on aerial photography from the 1950s to 1990, for landscape ecology and spatial modeling studies. Aerial photos were interpreted for hydrologically relevant vegeta...
Willamette National Forest soil resource inventory (SRI 1992) clipped to the Andrews Experimental Forest
This layer contains the delineations of the soil landtype mapping units defined in the 1992 update to the SRI (Soil Resource Inventory) The mapping units are derived and defined on the basis of soil, landform, geology and vegetation characteristics. The average delineation size for each mapping unit is 50 to 600 acres...
Fungal mat transect mapping, High 15 in the Andrews Experimental Forest, 1994-1995
The main objective of this study was to determine if there were relationships between forest floor attributes such as the location of: (1) individual trees, (2) clusters of undergrowth vegetation, (3) coarse woody debris, (4) rocks and (5) topography and both soil characteristics and distribution patterns of ectomycorr...
Meterological station locations, Andrews Experimental Forest, 1994 - 2011
Meteorological stations for the HJ Andrews Experimental Forest. This dataset includes meteorological station locations, raingage locations, and thermograph locations. Some of the locations were collected using GPS equipment.
Average monthly and annual temperature spatial grids (1980-1990), Andrews Experimental Forest
Average monthly and annual temperature spatial grids (1980-1989), Andrews Experimental Forest. Monthly and annual temperature maps (mean, max, min) were developed by Lynn Rosentrater for her master's thesis. Data came from the Andrews thermograph network (see Study Code MS005). Lynn developed Surfer maps from which the...
10 meter digital elevation model (DEM) clipped to the Andrews Experimental Forest, 1998
A Digital Elevation Model (DEM) is a digital data file containing an array of elevation information over a portion of the earth's surface. This array is developed using information extracted from digitized elevation contours from Primary Base Series (PBS) maps. FSTopo or PBS are 1:24,000 scale topographic maps. This da...
Comparisons among five canopy-cover estimating methods in five Douglas-fir/western hemlock structure types in the western Oregon Cascades
Estimates of forest canopy cover are widely used in forest research and management, yet methods used to quantify canopy cover and the estimates they provide vary greatly. Four ground-based techniques for estimating overstory cover -line- intercept, spherical densiometer, moosehorn, and hemispherical photography-and cov...
Stream specific conductance and temperature from small watersheds in the Andrews Forest
Stream specific conductance and water temperature are measured instantaneously every 5 minutes at most of the gauged watersheds within the H.J. Andrews Experimental Forest (Watersheds 1, 2, 3, 6, 7, 8, 10 and Mack Creek). Data is complementary to stream chemistry measurements from a proportional sampler (CF002) and lon...
Mass movement assessment: cascade hazards ratings, Andrews Experimental Forest, 1992
Debris flow hazard and susceptibility rating of the Lookout Creek drainage for less than third-order streams, includes susceptibility classification for stream-side landslides and slumps in Lookout Creek. This data is a first estimation, including unknown things such as distribution of thick colluvium along the stream.
Stream and air temperature data from stream gages and stream confluences in the Andrews Experimental Forest, 1950 to present
Stream and air temperature are measured in tandem at stream gauging stations and other selected locations and stream confluences within the Andrews Forest. Air temperature is generally measured over the stream or alongside. Currently, mean, max and min water and air temperature data are collected every 5 minutes at the...
Snow depth and snow water equivalent measurements from Benchmark Stations, along a road course, and historic snow course in the Andrews Experimental Forest, 1978 to present
With an increase in emphasis on monitoring climate change impacts and change in the form of precipitation at HJ Andrews Experimental Forest, snow data collection within our climate monitoring program, a snow course to document depths of snow was designed around a dispersed sampling scheme rather than a point intensive ...
Solar radiation data from benchmark stations at the HJ Andrews Experimental Forest, 1973 to present
A three-level hydro-climatological network for data monitoring was established in 1994. The networks at each level are nested to form a coordinated program of data acquisition and measurement. A future vision of linking the benchmark meteorological stations with regional weather stations to expand the future scope of s...