In a recent essay in Nature, former Lead PI of the LTER program, Michael Paul Nelson, draws on lessons long familiar in the humanities. Nelson argues that we should shift our priorities toward…
Growing evidence has shown that changes in landscape-level factors by accelerated land-use change can shape soil pathogenic fungal diversity. Researchers assessed how pathogenic fungal diversity in…
In late June 2021, multiple days of record-breaking heat caused an unprecedented amount of foliage death in the forests of the Pacific Northwest. Portions of tree canopies with healthy green foliage…
Understanding the mechanisms that enable species to coexist is essential for explaining community structure and biodiversity. Researchers compared the diets of two dominant stream predators in western…
Using data compiled from around the world and over decades, researchers showed that large wood mobility in rivers is infrequent and highly variable, influenced by a combination of wood characteristics…
Forest plantations are widespread globally. Young forest plantations (hereafter young forests) differ from natural old-growth forests (hereafter old forests) in above- and below-ground structures…
Forest succession theory predicts long-term dynamics of tree species and ecosystem biomass through time, with shifts from early- to late seral species and cessation of live biomass accumulation being…
OSU graduate student, Matthew Weldy, is harnessing the power of AI and open-source modeling to process millions of hours of recorded acoustic data of birds across the forests of the Pacific Northwest…
The 200-year log decomposition study, now entering year 40, is already yielding unexpected insights. Read the full story in the September 2025 issue of Scientific American magazine: https://www…
“People say, ‘Oh the forest was lost.’ It’s not lost. It’s changed,” said Mark Harmon, a forest decomposition expert and professor emeritus at Oregon State University. Half of his research plots at…
Researchers studied the impact of experimentally reduced streamflow and increased temperature on fish and salamander. Results suggest that future shifts in community dynamics may favor trout under…
Watersheds and streams, such as this one at the H.J. Andrews Experimental Forest, are impacted by disturbances such as fire and reduced snowpack. Photo by Ben Nash.
Perry, Zachary; Segura, Catalina; Brooks, J. Renée; Takaoka, Sadao; Swanson, Frederick J. 2026. The Influence of Geomorphology on Storage and Surface Water–Groundwater Interactions in Mountainous Headwater Streams. Hydrological Processes. 40(1): e70361. doi:https://doi.org/10.1002/hyp.70361
Lan, Yung-Hsiang; Bell, David M.; Kim, Mee-Sook; Shaw, David C.; Chadwick, Kristen L.; Kearns, Holly S.J.; Pabst, Robert J.; Bluhm, Andrew A. 2026. A root rot pathogen associates with changes in forest community composition and productivity during 100 years of Douglas-fir forest development. Forest Ecology and Management. 603: 123426. doi:https://doi.org/10.1016/j.foreco.2025.123426
Arismendi, Ivan; Ain, Najma; Gerth, William; Bury, Gwendolynn; Zatkos, Lauren. 2026. Dietary niche partitioning between Coastal Giant Salamanders (Dicamptodon tenebrosus) and Coastal Cutthroat Trout (Oncorhynchus clarkii clarkii). Hydrobiologia. 853(2): 353-365. doi:https://doi.org/10.1007/s10750-025-05934-x
Baumhardt, Alex. 2025. 2021 heat dome left Rhode Island-sized damage in Oregon’s, Washington’s western forests. Oregon Public Broadcasting (OPB). https://www.opb.org/article/2025/11/16/2021-heat-dome-oregon-washington…
Blow, Ashli; Harmon, Mark. 2025. A 200-year experiment: If a tree falls in a forest, does it really die?. Lookout, Eugene-Springfield: Online November 4, 2025.
Without This Place Video
"Without This Place" highlights the importance of long-term research and the research findings of the HJ Andrews Experimental Forest and Long-Term Ecological Research site.
View a detailed forecast from the National Weather Service for HJA headquarters.