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TD031: Decomposition of Fine Woody Roots: a Time Series Approach, 1995 to 2006

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Status: notPlanned
Period: 1995-06-01 to 2006-06-01
Version: 6
Published: 2016-11-15
EDI Package ID: knb-lter-and.4064.6
Source XML: TD031_6.xml

Notice

"As Is" Basis: All content, including maps and forecasts, is provided without warranties. Users are advised to independently verify critical information.

Citation

Harmon, M. 2016. Decomposition of Fine Woody Roots: a Time Series Approach, 1995 to 2006 Long-Term Ecological Research Andrews Forest LTER Site. [Database]. Available: https://andrewsforest-stage.forestry.oregonstate.edu/data/fsdb-data-catalog/TD031 Accessed 2026-05-10.

Abstract

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 of fourteen species and five size classes were placed in the field to incubate and then collected at pre-planned intervals to determine mass loss and nitrogen content.

Coverage

Temporal coverage: 1995-06-01 to 2006-06-01

Geographic coverage: N/A

Bounds: W N/A, E N/A, N N/A, S N/A

Purpose
  • 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 of fourteen species and five size classes were placed in the field to incubate and then collected at pre-planned intervals to determine mass loss and nitrogen content.
Project

Title: Long-Term Ecological Research

Personnel
  • Sherri L. Johnson - Principal Investigator
    US Forest Service ;Pacific NW Research Station ;3200 SW Jefferson Way, Corvallis, OR, 97331, USA
    Phone: 541-758-7771
    Email: sherri.johnson2@usda.gov, sherri.johnson@oregonstate.edu
  • Julia A. Jones - Principal Investigator
    Oregon State University;Department of Geosciences; Wilkinson Hall 104, Corvallis, OR, 97331-5506, USA
    Phone: (541) 737-1224
    Email: Julia.Jones@oregonstate.edu, geojulia@comcast.net
    ORCID: http://orcid.org/0000-0001-9429-8925
  • Matthew G Betts - Principal Investigator
    Department of Forest Ecosystems and Society; 201E Richardson Hall; College of Forestry; Oregon State University, Corvallis, OR, 97331
    Phone: (541) 737-3841
    Email: matt.betts@oregonstate.edu
  • Michael P. Nelson - Principal Investigator
    Department of Forest Ecosystems and Society; 201K Richarson Hall; College of Forestry; Oregon State University, Corvallis, OR, 97331
    Phone: 541-737-9221
    Email: mpnelson@oregonstate.edu
    ORCID: http://orcid.org/0000-0001-6917-4752
  • David Bell - Principal Investigator
    Email: david.bell@usda.gov, david.bell@oregonstate.edu
Abstract
  • The H.J. Andrews Experimental Forest is a living laboratory that provides unparalleled opportunities for the study of forest and stream ecosystems in the central Cascade Range of Oregon. Since 1980, as a part of the National Science Foundation Long Term Ecological Research (NSF-LTER) program, the Andrews Experimental Forest has become a leader in the analysis of forest and stream ecosystem dynamics.
  • Long-term field experiments and measurement programs have focused on climate dynamics, streamflow, water quality, and vegetation succession. Currently researchers are working to develop concepts and tools needed to predict effects of natural disturbance, land use, and climate change on ecosystem structure, function, and species composition.
  • The Andrews Experimental Forest is administered cooperatively by the USDA Forest Service Pacific Northwest Research Station, Oregon State University and the Willamette National Forest. Funding for the research program comes from the National Science Foundation (NSF), US Forest Service Pacific Northwest Research Station, Oregon State University, and other sources.
Funding

Data were provided by the HJ Andrews Experimental Forest research program, funded by the National Science Foundation's Long-Term Ecological Research Program (DEB 2025755), US Forest Service Pacific Northwest Research Station, and Oregon State University. National Science Foundation: DEB1440409

Study Area Description
  • Long-Term Ecological Research
    The Andrews Forest is situated in the western Cascade Range of Oregon, and covers the entire 15,800-acre (6400-ha) drainage basin of Lookout Creek. Elevation ranges from 1350 to 5340 feet (410 to 1630 m). Broadly representative of the rugged mountainous landscape of the Pacific Northwest, the Andrews Forest contains excellent examples of the region's conifer forests and associated wildlife and stream ecosystems. These forests are among the tallest and most productive in the world, with tree heights of often greater than 250 ft (75 m). Streams are steep, cold and clean, providing habitat for numerous aquatic organisms.
Associated Party
  • Mark E. Harmon
    Role: Principal Investigator
    Oregon State University;Dept. of Forest Science;321 Richardson Hall, Corvallis, OR, 97331-5752, USA
    Phone: (541) 737-8455, (978) 724-0045 ext 223
    Email: mark.harmon@oregonstate.edu
  • Hua Chen
    Role: Other Researcher
    Biology Department ;University of Illinois at Springfield, Springfield, IL, 62703, USA
    Phone: 217-206-8339, 334-559-9354
    Email: hchen40@uis.edu
  • Becky Fasth
    Role: Abstractor
    Oregon State University;College of Forestry;Dept. of Forest Ecosystems and Society; 201L Richardson Hall, Corvallis, OR, 97331, USA
    Phone: (541) 737-8431, (541) 737-8460
    Email: becky.fasth@oregonstate.edu
  • Mark E. Harmon
    Role: Creator
    Oregon State University;Dept. of Forest Science;321 Richardson Hall, Corvallis, OR, 97331-5752, USA
    Phone: (541) 737-8455, (978) 724-0045 ext 223
    Email: mark.harmon@oregonstate.edu
Contact
Publisher
  • Andrews Forest LTER Site
    Role: Publisher
    Forest Ecosystems and Society Department in Forestry, Oregon State University, 201K Richardson Hall, Corvallis, OR, 97331-5752
    Phone: (541) 737-8480
    Email: lterweb@fsl.orst.edu
Study Description

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 of fourteen species and five size classes were placed in the field to incubate and then collected at pre-planned intervals to determine mass loss and nitrogen content. 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 of fourteen species and five size classes were placed in the field to incubate and then collected at pre-planned intervals to determine mass loss and nitrogen content. Field Methods - TD031

Purpose: 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 of fourteen species and five size classes were placed in the field to incubate and then collected at pre-planned intervals to determine mass loss and nitrogen content.

Methods

Method Steps

Field Methods - TD031
  • A total of 15 species of fine roots, which are dominant or common at Pacific Northwest, were obtained from local tree nurseries including Bend Pine, H. J. Stone, and Wind River Nursery in Oregon and Washington in early spring of 1994. Of these species, 4 deciduous and 11 coniferous species were obtained. After fine roots (less than 2 mm) were trimmed from seedlings at nurseries they were transported to Corvallis, Oregon. Fine roots of each species were cleaned by tap water and then they were spread in trays and air-dried at 15 to 20ºC room temperature to a constant mass (10 days). Approximately 10 g of air-dry fine roots were weighed and put into 20 x 20 cm polyester cloth litter bags and sealed with six monel staples. Sub-samples were retained for initial moisture, ash and nutrient content.
  • All of the other size classes used in this study were collected from recently uprooted trees. Either wind throw or road building uprooted the chosen trees. The roots obtained from the field were sorted into small (2 - 10 mm), medium (10 - 50 mm), large (50 - 100 mm), and jumbo roots (greater than 100 mm). The roots were then cut into 20 cm long segments (samples). The root segments were air-dried at 15 to 20ºC room temperature to a constant mass (20-50 days). Approximately 10 g of air-dried small roots were weighed and put into 20 x 20 cm polyester cloth litter bags that were sealed with six monel staples. We used the same type of cloth bag as with the fine roots. Sub-samples of small roots were retained for initial moisture and nutrient content.
  • Considering the wide variation of moisture content of the different segments of roots that were large as compared to the small roots, we determined the total air-dried weight of each root segment individually after measuring its moisture content by sub-sample. Before field placement, each segment was sealed at the ends using epoxy to prevent end rot effect before putting it into a mesh bag (mesh size= 0.4 mm). Therefore, the initial dry weight of each sample varied for all the medium, large, and jumbo roots as compared to the fine and small roots which were all roughly the same weight. Each sample was tagged with a numbered aluminum tag on a cable tie.
  • Root samples that were to be harvested at the same time were tethered together by a nylon line through a cable tie attached to the aluminum tag and the mesh sample bag. Tethered root samples were buried in the top 20 cm of soil. Each site had four replicates with the same set up of root species and sizes. Additionally, one wooden dowel (species: GOBA) was placed at the end of each tethered line in such a way that half of the dowel was above ground and half was belowground. Dowels were 1 cm in diameter, 61 cm long, and composed of Gonystylus bancanus, a non-decay-resistant tropical tree species. The bottom half of the dowel was encased in a 1 mm mesh sleeve for improved sample removal. Samples were placed for incubation in the field in June of 1995.
Laboratory Methods - TD031
  • Decomposition of the roots was estimated from the change in ash free dry weight (mass) of the root samples. Root and dowel samples were returned to laboratory, carefully brushed free of soil and other debris, plus and in-growing roots were removed. Samples were dried to a constant mass at 65 C and then weighed. If the roots were large they were chopped into small pieces before drying. Weight loss from the roots and dowels were calculated after correcting for ash content. Dried root samples were then ground in a Wiley mill and passed through a fine screen (1 mm). Samples were stored in 20 ml vials to prevent moisture changes prior to analyses for ash and nitrogen.

Sampling

Sampling Description
  • The overall experimental design for the root decomposition study was a split-plot with 3 sites, 4 replicates, 5 size classes, and 4 backbone species. The three incubation sites were Cascade Head Exp. For. , H.J. Andrews Exp. For., and Pringle Falls Exp. For. The 5 size classes included fine roots (less than 2 mm diameter), small roots (2-10 mm), medium roots (10-50 mm), large roots (50-100 mm), and jumbo roots (greater than 100 mm). The backbone species were Alnus rubra (red alder), Pseudotsuga menziesii (Douglas-fir), Tsuga heterophylla (western hemlock), and Pinus pondersoa (ponderosa pine). For fine roots another 11 species were included. They are Acer macrophyllum (bigleaf maple), Acer rubrum (red maple), Abies magnifica (California red-fir), A. concolor (white fir), A. procera (noble fir), Calocedrus decurrens (incense-cedar), Fraxinus latifolia (Oregon ash), Picea engelmanni (Engelmann spruce), Pinus contorta (lodgepole pine), P. monticola (western white pine), and Thuja plicata (western redcedar). An additional 3 species were included in the small and medium root classes besides the backbone species. In the large root category, we studied lodgepole pine, ponderosa pine, and Douglas-fir. Jumbo roots included ponderosa pine and lodgepole pine.
Spatial Sampling Units
  • Andrews Experimental Forest (HJA)
    W -122.26172200, E -122.10084700, N 44.28196400, S 44.19770400
    Altitude: 1631 to 1631 meter
  • Cascade Head Experimental Forest OR (TD027)
    W -123.99172777, E -123.89730000, N 45.06476948, S 45.03130000
  • Pringle Falls Experimental Forest
    W -121.61548044, E -121.60590486, N 43.70822744, S 43.70581376
Software

No software entries listed in this EML file.

Keywords
  • LTER controlled vocabulary: decomposition (theme), inorganic nutrients (theme), nitrogen (theme), organic matter (theme), roots (theme), fine roots (theme)
  • LTER core research areas: inorganic nutrients (theme), organic matter (theme)
Taxonomic Hierarchy
  • All Organisms: All Organisms
  • Highest common category (ca. kingdom): Plantae
  • Division or Phylum: Coniferophyta
  • Class: Pinopsida
  • Order: Pinales
  • Family: Pinaceae
  • Genus: Pinus
  • Species: Pinus ponderosa
  • Species: Pinus contorta
  • Species: Pinus monticola
  • Genus: Abies
  • Species: Abies procera
  • Species: Abies concolor
  • Species: Abies magnifica
  • Genus: Picea
  • Species: Picea engelmannii
  • Genus: Pseudotsuga
  • Species: Pseudotsuga menziesii
  • Genus: Tsuga
  • Species: Tsuga heterophylla
  • Family: Cupressaceae
  • Genus: Thuja
  • Species: Thuja plicata
  • Genus: Calocedrus
  • Species: Calocedrus decurrens
  • Division or Phylum: Magnoliophyta
  • Class: Liliopsida
  • Subclass: Asteridae
  • Order: Scrophulariales
  • Family: Oleaceae
  • Genus: Fraxinus
  • Species: Fraxinus latifolia
  • Class: Magnoliopsida
  • Subclass: Hamamelididae
  • Order: Fagales
  • Family: Fagaceae
  • Genus: Chrysolepis
  • Species: Castanopsis chrysophylla
  • Family: Betulaceae
  • Genus: Alnus
  • Species: Alnus rubra
  • Subclass: Rosidae
  • Order: Rosales
  • Family: Rosaceae
  • Genus: Purshia
  • Species: Purshia tridentata
  • Order: Sapindales
  • Family: Aceraceae
  • Genus: Acer
  • Species: Acer rubrum
  • Species: Acer macrophyllum
  • Subclass: Dilleniidae
  • Order: Ericales
  • Family: Ericaceae
  • Genus: Rhododendron
  • Species: Rhododendron macrophyllum
  • Genus: Gonystylus
  • Species: Gonystylus bancanus
Data Entities
# Entity Metadata Data
1 TD03101
TD03101
Sample weights, mass loss, carbon and nitrogen dynamics:
 METADATA DATA
Metadata
TD03101 - TD03101

Object name: TD03101.csv

Records: 1513

Attributes: 27

File size: 202127 byte

Checksum (MD5): 408238e72bc12bf7d0cf0e2330a11161

Format: headers=1, recordDelimiter=\r\n, fieldDelimiter=,, quoteCharacter=", orientation=column

Constraints (2)
  • primaryKey: PRIMARY
    TD03101.TYPE, TD03101.SAMP_NUM
  • notNullConstraint: NOTNULL
    TD03101.SITE, TD03101.TYPE, TD03101.DBCODE, TD03101.SPECIES, TD03101.ENTITY, TD03101.IASH, TD03101.REP, TD03101.SAMP_NUM, TD03101.TIME, TD03101.TIMEOUT
Attributes (27)
DBCODE - char(5) (nominal)

ID: TD03101.DBCODE

FSDB database code

Type system: Microsoft SQL Server 2008

Code definitions (1)
  • TD031
    FSDB database code TD031 (Terrestrial: organic decomposition)
ENTITY - numeric(2,0) (ratio)

ID: TD03101.ENTITY

Entity number

Type system: Microsoft SQL Server 2008

Unit: number

Precision: 1.000000

Numeric domain: type=integer, min=1.0000 (exclusive=false), max=1.0000 (exclusive=false)

SITE - char(3) (nominal)

ID: TD03101.SITE

Site where samples were incubated

Type system: Microsoft SQL Server 2008

Code definitions (3)
  • HJA
    H.J. Andrews Experimental Forest Oregon
  • CAH
    Cascade Head Experimental Forest
  • PRF
    Pringle Falls Experimental Forest
REP - numeric(1,0) (ratio)

ID: TD03101.REP

Replicate number

Type system: Microsoft SQL Server 2008

Unit: number

Precision: 1.000000

Numeric domain: type=integer, min=1.0000 (exclusive=false), max=4.0000 (exclusive=false)

TIME - numeric(1,0) (ratio)

ID: TD03101.TIME

The time the litter will be harvested (sequential collection number)

Type system: Microsoft SQL Server 2008

Unit: number

Precision: 1.000000

Numeric domain: type=integer, min=1.0000 (exclusive=false), max=6.0000 (exclusive=false)

TIMEOUT - numeric(4,2) (ratio)

ID: TD03101.TIMEOUT

The amout of time that the root sample incubated in the field

Type system: Microsoft SQL Server 2008

Unit: number of years

Precision: 0.250000

Numeric domain: type=real, min=0.2500 (exclusive=false), max=2.0000 (exclusive=false)

SPECIES - char(5) (nominal)

ID: TD03101.SPECIES

Root species code

Type system: Microsoft SQL Server 2008

Code definitions (19)
  • ABCO
    Abies concolor
  • ABMA
    Abies magnifica
  • ABPR
    Abies procera
  • ACMA
    Acer macrophyllum
  • ALRU
    Alnus rubra
  • CADE3
    Calocedrus decurrens
  • FRLA2
    Fraxinus latifolia
  • PIEN
    Picea engelmannii
  • PICO
    Pinus contorta
  • PIMO
    Pinus monticola
  • PIPO
    Pinus ponderosa
  • PSME
    Pseudotsuga menziesii
  • PUTR
    Purshia tridentata
  • RHMA
    Rhododendron macrophyllum
  • THPL
    Thuja plicata
  • TSHE
    Tsuga heterophylla
  • CACH
    Castanopsis chrysophylla
  • GOBA
    Gonystylus bancanus
  • ACRU2
    Acer rubrum
TYPE - char(1) (nominal)

ID: TD03101.TYPE

Diameter class of the root sample, position for the GOBA (dowel) sample

Type system: Microsoft SQL Server 2008

Code definitions (7)
  • A
    Aboveground dowel
  • B
    Belowground dowel
  • F
    Fine root size class <2mm
  • J
    Jumbo root size class >100mm
  • L
    Large root size class 50-100mm
  • M
    Medium root size class 10-50mm
  • S
    Small root size class 2-10mm
SAMP_NUM - numeric(5,0) (ratio)

ID: TD03101.SAMP_NUM

Unique sample number, except for GOBA dowels that are differentiated by type

Type system: Microsoft SQL Server 2008

Unit: number

Precision: 1.000000

Numeric domain: type=integer, min=1.0000 (exclusive=false), max=10804.0000 (exclusive=false)

IODW - numeric(8,3) (ratio)

ID: TD03101.IODW

Initial oven dry weight before field incubation

Type system: Microsoft SQL Server 2008

Unit: grams

Precision: 0.001000

Numeric domain: type=real, min=0.0000 (exclusive=false), max=3549.5000 (exclusive=false)

IASH - numeric(6,2) (ratio)

ID: TD03101.IASH

Percent of initial sample composed of ash

Type system: Microsoft SQL Server 2008

Unit: percent

Precision: 0.010000

Numeric domain: type=real, min=0.0000 (exclusive=false), max=12.3200 (exclusive=false)

IAFODW - numeric(8,2) (ratio)

ID: TD03101.IAFODW

Initial ash-free oven dry weight

Type system: Microsoft SQL Server 2008

Unit: grams

Precision: 0.010000

Numeric domain: type=real, min=0.0000 (exclusive=false), max=3525.7200 (exclusive=false)

INI_C - numeric(6,2) (ratio)

ID: TD03101.INI_C

Percent of initial sample composed of carbon ((100-iash)/1.9)

Type system: Microsoft SQL Server 2008

Unit: percent

Precision: 0.010000

Numeric domain: type=real, min=44.7400 (exclusive=false), max=54.4000 (exclusive=false)

INI_N - numeric(6,2) (ratio)

ID: TD03101.INI_N

Percent of initial sample composed of nitrogen

Type system: Microsoft SQL Server 2008

Unit: percent

Precision: 0.010000

Numeric domain: type=real, min=0.1300 (exclusive=false), max=2.1900 (exclusive=false)

INI_C_CONT - numeric(7,3) (ratio)

ID: TD03101.INI_C_CONT

Carbon content of initial sample ashfree basis

Type system: Microsoft SQL Server 2008

Unit: grams

Precision: 0.001000

Numeric domain: type=real, min=0.0000 (exclusive=false), max=1805.5200 (exclusive=false)

INI_N_CONT - numeric(7,3) (ratio)

ID: TD03101.INI_N_CONT

Nitrogen content of initial sample ashfree basis

Type system: Microsoft SQL Server 2008

Unit: grams

Precision: 0.001000

Numeric domain: type=real, min=0.0000 (exclusive=false), max=7.1170 (exclusive=false)

FWW - numeric(7,2) (ratio)

ID: TD03101.FWW

Final wet weight of sample after field incubation

Type system: Microsoft SQL Server 2008

Unit: grams

Precision: 0.010000

Numeric domain: type=real, min=6.7900 (exclusive=false), max=9091.2002 (exclusive=false)

FOW - numeric(7,2) (ratio)

ID: TD03101.FOW

Final oven dry weight of sample after field incubation

Type system: Microsoft SQL Server 2008

Unit: grams

Precision: 0.010000

Numeric domain: type=real, min=2.1000 (exclusive=false), max=3516.0000 (exclusive=false)

FASH - numeric(6,2) (ratio)

ID: TD03101.FASH

Percent of sample composed of ash after field incubation

Type system: Microsoft SQL Server 2008

Unit: percent

Precision: 0.010000

Numeric domain: type=real, min=0.0100 (exclusive=false), max=26.3000 (exclusive=false)

FAFOW - numeric(8,3) (ratio)

ID: TD03101.FAFOW

Final ash-free oven dry weight after field incubation

Type system: Microsoft SQL Server 2008

Unit: grams

Precision: 0.001000

Numeric domain: type=real, min=1.6170 (exclusive=false), max=3463.2600 (exclusive=false)

MOISTURE - numeric(5,1) (ratio)

ID: TD03101.MOISTURE

Percent moisture of final sample after field incubation, can be over 100 moisture=100*((fww-fow)/fow) ie. water weight/dry weight * 100

Type system: Microsoft SQL Server 2008

Unit: percent

Precision: 0.100000

Numeric domain: type=real, min=2.5000 (exclusive=false), max=2439.0000 (exclusive=false)

MASSLOSS - numeric(6,2) (ratio)

ID: TD03101.MASSLOSS

Percent of the mass of the sample that was lost during incubation

Type system: Microsoft SQL Server 2008

Unit: percent

Precision: 0.010000

Numeric domain: type=real, min=-9.0600 (exclusive=false), max=77.2200 (exclusive=false)

CARBON - numeric(6,2) (ratio)

ID: TD03101.CARBON

Percent of final sample composed of carbon after field incubation ((100-fash)/1.9)

Type system: Microsoft SQL Server 2008

Unit: percent

Precision: 0.010000

Numeric domain: type=real, min=38.7900 (exclusive=false), max=52.6300 (exclusive=false)

CARBON_REM - numeric(6,2) (ratio)

ID: TD03101.CARBON_REM

Percent of initial carbon content (mass) remaining after field incubation ie. final carbon content/initial carbon content

Type system: Microsoft SQL Server 2008

Unit: percent

Precision: 0.010000

Numeric domain: type=real, min=17.4600 (exclusive=false), max=106.0300 (exclusive=false)

AF_N - numeric(6,2) (ratio)

ID: TD03101.AF_N

Percent of sample composed of nitrogen after field incubation

Type system: Microsoft SQL Server 2008

Unit: percent

Precision: 0.010000

Numeric domain: type=real, min=0.0300 (exclusive=false), max=2.6000 (exclusive=false)

NITRO_REM - numeric(6,2) (ratio)

ID: TD03101.NITRO_REM

Percent of initial nitrogen content (mass) remaining after field incubation ie. final nitrogen content/initial nitrogen content

Type system: Microsoft SQL Server 2008

Unit: percent

Precision: 0.010000

Numeric domain: type=real, min=10.4200 (exclusive=false), max=219.2300 (exclusive=false)

C_N_RATIO - numeric(6,2) (ratio)

ID: TD03101.C_N_RATIO

Ratio of carbon to nitrogen (c:n)

Type system: Microsoft SQL Server 2008

Unit: number

Precision: 0.010000

Numeric domain: type=real, min=18.1800 (exclusive=false), max=1728.7000 (exclusive=false)

Units
grams g mass gram kilogram 0.001 grams; 0.001 kilogram
percent % dimensionless number dimensionless 100 percent; a number
number number dimensionless number dimensionless 1 dimensionless number, i.e., ratio, count
number of years years time nominalYear second 31536000 one year excluding leap seconds and leap days, 31536000 seconds (often used for age in years)
Related Datasets

No related dataset codes found in the EML text fields.

Related Publications
  • Chen, Hua. 1999. Root decomposition in three coniferous forests: effects of substrate quality, temperature, and moisture. Corvallis, OR: Oregon State University. 218 p. Ph.D. dissertation.
  • Chen, Hua; Harmon, Mark E.; Griffiths, Robert P.; Hicks, William. 2000. Effects of temperature and moisture on carbon respired from decomposing woody roots. Forest Ecology and Management. 138: 51-64.
  • Chen, Hua; Harmon, Mark E.; Sexton, Jay; Fasth, Becky. 2002. Fine-root decomposition and N dynamics in coniferous forests of the Pacific Northwest, USA. Canadian Journal of Forest Research. 32: 320-331 .
  • Chen, Hua; Hicks, William. 2003. High asymbiotic N2 fixation rates in woody roots after six years of decomposition: controls and implications. Basic and Applied Ecology. 4: 479-486.
Related Files

No related files listed in this EML file.

Intellectual Rights

Data Use Agreement:

The re-use of scientific data has the potential to greatly increase communication, collaboration and synthesis within and among disciplines, and thus is fostered, supported and encouraged. This Data Set is released under the Creative Commons license CC BY "Attribution" (see: https://creativecommons.org/licenses/by/4.0/). Creative Commons license CC BY - Attribution is a license that allows others to distribute, remix, tweak, and build upon your work (even commercially), as long as you are credited for the original creation. This license accommodates maximum dissemination and use of licensed materials.

It is considered professional conduct and an ethical obligation to acknowledge the work of other scientists. The Data User is asked to provide attribution of the original work if this data package is shared in whole or by individual parts or used in the derivation of other products. A recommended citation is provided for each Data Set in the Andrews LTER data catalog (see: http://andlter.forestry.oregonstate.edu/data/catalog/datacatalog.aspx). A generic citation is also provided for this Data Set on the website https://portal.edirepository.org in the summary metadata page. Data Users are thus strongly encouraged to consider consultation, collaboration and/or co-authorship with the Data Set Creator.

While substantial efforts are made to ensure the accuracy of data and associated documentation, complete accuracy of data sets cannot be guaranteed and all data are made available "as is." The Data User should be aware, however, that data are updated periodically and it is the responsibility of the Data User to check for new versions of the data. The data authors and the repository where these data were obtained shall not be liable for damages resulting from any use or misinterpretation of the data.

General acknowledgement: Data were provided by the HJ Andrews Experimental Forest research program, funded by the National Science Foundation's Long-Term Ecological Research Program (DEB 2025755), US Forest Service Pacific Northwest Research Station, and Oregon State University.

Licensed

License: N/A

Maintenance

Maintenance update frequency: notPlanned

Description

  • An update history is logged and maintained with each new version of every dataset.

Change History

  • Version1 (2005-06-28)
    Original metadata creation
  • Version2 (2005-06-28)
    Moved database to SQL server