Researchers used canopy thermal images to understand connections between tree canopy temperatures and biological processes like photosynthesis, as well as the response of trees to heat waves and…
Under certain conditions, cold air can pool in valleys making the air colder at lower elevations than at higher elevations, creating what’s called a temperature inversion. Nighttime inversions were…
Sixty oral histories totaling more than 160 hours of interviews are now available as "Voices of the Forests: Voices of the Mills", and archive in the OSU Library Special Collections and Archives…
Dick Iverson, USGS scientist, ran experiments on the HJA flume for three decades. His findings have been pivotal in modeling debris flow runout, which is critical in hazard assessments/predictions…
In the book, "A Place for Inquiry, A Place for Wonder: The Andrews Forest," historian Bill Robbins places the work of the HJA within its larger and continuously evolving societal and political…
The Holiday Farm fire ignited the night of September 7, 2020, south of the H.J. Andrews Experimental Forest (HJA). Fire entered the HJA on September 12, at the south boundary of Watershed 9, and…
Dwarf mistletoe’s quaint name belies its severity. The native parasitic plant commonly infects western hemlock trees in western Oregon and Washington via projectile seeds that land on branches and…
A new research project at the H.J. Andrews Experimental Forest aims to shed light on how changes in temperature and precipitation affect patterns of biodiversity. The Forests of Oregon Elevation…
Dwarf mistletoe infections cause changes in tree growth and water use. To understand the effect of mistletoe in the canopy of a tree, and in the broader area of a forest, researchers are climbing into…
Hermit Warblers are endemic breeders in forests of the Pacific Northwest; they migrate to Central America (Mexico south to Costa Rica) during their non-breeding period. A new study at the H.J. Andrews…
A recent publication out of the HJ Andrews Experimental Forest LTER site illustrates the role that summer research experiences can play in contributing to LTER science and in engaging and mentoring…
Get a stunning bird's-eye view of the forest from above the trees, and through the trees, and find out what scientists are learning about how birds may be using the old-growth forest to beat the heat.
An international research team conducted the first continental-scale study of carbon flows into and out of streams across six major climatic zones. Scientists analyzed the balance between…
Old forests that contain large trees and a diversity of tree sizes and species may offer refuge to some types of birds facing threats in a warming climate. In a paper published in Diversity and…
Clearcuts often create stark boundaries between forest habitats. Researchers used remote sensing to assess how harvest edges influence tree basal area and how those effects varied with harvest size…
In a new study, Adam Ward will develop a framework to improve our understanding of dynamic exchange processes in the river corridor, thereby improving our ability to predict the transport and fate of…
Analysis of 60‐year records of daily streamflow from eight paired‐basin experiments in the H.J. Andrews Experimental Forest revealed that the conversion of old‐growth forest to Douglas‐fir plantations…
Forest canopies along streams regulate stream light availability, which influences water temperature, in-stream primary productivity, nutrient dynamics, and, thereby, the entire aquatic ecosystem…
Leaf litter breakdown rates may increase 5 percent to 21 percent with a 1 degree to 4-degree Celsius rise in stream water temperature. Mean annual water temperature for some streams and rivers is…
A publication co-authored by a team of Oregon State University, US Forest Service, and US Geological Survey investigators compares quality of interpretation of northern spotted owl habitat based on…
Forested watersheds may not store quite as much carbon as previously thought. Small, headwater streams, such as those found in the H.J. Andrews Experimental Forest, import a higher than expected…
The amount of carbon stored in tree trunks, branches, leaves and other biomass — what scientists call “aboveground live carbon” — is determined more by timber harvesting than by any other…