The images in our galleries reflect the history, place, people, and research of the HJ Andrews Experimental Forest Long-Term Ecological Research Program. Images may be downloaded for use in papers, posters, presentations, etc. Please use the suggested acknowledgements. In some cases, higher resolution images may be available from the information manager.
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Our archived image library has several older images that don't appear in our image galleries, below.
Dr. Catalina Segura, Dr. Julian Klaus, Dr. Dana Warren, and graduate student Maeve Bittle are investigating how fire and drought conditions affect instream primary production and nutrient dynamics. Mountainous headwater streams in forests like the H.J. Andrews Experimental Forest play an important...
The Forests of Oregon Elevation Gradient (FOREG) is a network of large sample plots established in the HJ Andrews Experimental Forest (HJA) in 2019. Run by Dr. Joseph LaManna with Marquette University, the FOREG study is designed to answer questions about the drivers of forest biodiversity. The...
The Fire History Project at the H.J. Andrews Experimental Forest (HJA) is lead by the OSU Tree Ring Lab. The objective is to develop a precise understanding of the historical fire regime across the HJA. While previous studies characterized fire history in the HJA, there was an absence of annually...
The Pacific Northwest Permanent Sample Plot Program (PSP) is a long-term study of forest vegetation across the Pacific Northwest. The program samples 135 plots across a diversity of forest types in Oregon and Washington. Many of the plots are within the HJ Andrews Experimental Forest. Long-term...
The bird population and dynamics study is part of the Long-Term Ecological Research program at the HJ Andrews Experimental Forest. The Forest-Wide Bird Survey data include point count and bird observations from 183 sites across the forest, starting in 2009. As part of the long-term study...
The reciprocal transplant project aims identify the factors that explain long-term relationships between environmental conditions and interactions between plants, mosses, lichens, and endophytes. Organisms were collected and co-located with or without interacting species across a stratified gradient...
Researchers are interested in how wildfire impacts nutrients of forests—particularly as wildfires are becoming more frequent across the globe. Following the 2023 Lookout Fire, which burned over much of the H.J. Andrews Experimental Forest (HJA), researchers Dr. Georgia Seyfried, Dr. Jacob Bukoski...
Researchers returned to stretches of Lookout Creek and Mack Creek that were burned over in the 2023 Lookout Fire to collect information on changes in the stream and stream habitat after the wildfire. The researchers measured decomposition rates of the stream and riparian soils, collected stream...
The Lookout Fire burned over approximately 70% of the H.J. Andrews Experimental Forest in the summer and fall of 2023. As soon as it was safe, researchers and forest managers explored the burned areas, to discuss the fire progression and fire suppression efforts. Researchers documented post-burn...
The Lookout Fire ignited August 5, 2023, by lighting on the flank of Lookout Mountain, at the heart of the H.J. Andrews Experimental Forest. The fire footprint covered approximately 70% of the site. Thanks to huge efforts of fire crews, the headquarters facility was spared by the fire, protected by...
Nina Ferrari, a graduate student at Oregon State University with Professor Matthew Betts, studies birds that spend their breeding season in the canopies of tall trees. Specifically, Nina is trying to understand what factors contribute to the vertical partitioning of birds in these canopies. On a...
Dr. Dana Warren, Dr. Catalina Segura, and graduate student Maddie Maffia are exploring how decoupled drought conditions affect streams and the species that live in streams. Under low-flow conditions, trout and salamanders aggregate in pools or cooler water, increasing competition for...
The NSF-funded Research Experience for Teachers (RET) program matches K-12 teachers with scientists for 8-10 weeks of field data collection and independent research. The goal of the RET program is to enhance the professional development of K-12 science educators through research experience at the...
The reciprocal transplant project aims identify the factors that explain long-term relationships between environmental conditions and interactions between plants, mosses, lichens, and endophytes. Organisms were collected and co-located with or without interacting species across a stratified gradient...
The bird population and dynamics study is part of the Long-Term Ecological Research program at the HJ Andrews Experimental Forest. The Forest-Wide Bird Survey data include point count and bird observations from 183 sites across the forest, starting in 2009. With these data researchers are learning...
Every six years the National Science Foundation appoints a panel to review the work and progress of the HJ Andrews Experimental Forest Long-Term Ecological Research Program. The review involves two days of presentations on our research, education, information management, network participation, and...
Graduate student Jaime Ortega, a visiting scholar from Panama, works with Dr. Catalina Segura at Oregon State University. Jaime’s graduate research project evaluates the relative streamflow contribution of a spring-fed headwater stream to a higher order stream in the H.J. Andrews Experimental Forest...
Dr. Dana Warren, Dr. Catalina Segura, and graduate student Allison Swartz are exploring how drought conditions affect streams and the animals that live in streams. Under low-flow conditions, trout and salamanders aggregate in pools or cooler water, increasing competition for macroinvertebrate prey...
Researchers are pairing data from long-term measurements on tree growth and mortality with data from tree cores the learn about the the influence of disturbance and elevation on tree growth and survival. These projects aim at contributing to our understanding of how competing drivers (i.e. micro...
Dr. Catalina Segura, Dr. Daniele Penna, and graduate student Zach Perry are investigating how landscape variability influences the hydrologic connection between hillslopes and streams across distinct geomorphic process domains. To explore this, they installed soil moisture sensors in three...