Photo Gallery
The images in our galleries reflect the history, place, people, and research of the HJ Andrews Experimental Forest and Long-Term Ecological Research site. Images may be downloaded for use in papers, posters, presentations, etc. We ask that both the photographer and the HJ Andrews Experimental Forest research program, funded by the National Science Foundation's Long-Term Ecological Research Program, US Forest Service Pacific Northwest Research Station, and Oregon State University be acknowledged and cited whenever an image is used. Please refer to the data use policy and suggested acknowledgements. In some cases, higher resolution images may be available from the database manager.
The galleries below display selected images from our full image library. We've highlighted images of broad appeal and interest; we will add additional images to these galleries over time. Our full collection of images can be found in our Image Library.
The Aquatic Vertebrate Population Study in Mack Creek (1987 to present) focuses on populations of cutthroat trout and salamanders in two...
Drs. Dana Warren and Catalina Segura 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...
The National Science Foundation (NSF) funds research at the HJ Andrews Experimental Forest through its Long-Term Ecological Research (LTER) grant funding. The Andrews Forest has been funded by the NSF LTER program since 1980. LTER grants are six...
The Pacific Northwest Permanent Sample Plot Program 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 Holiday Farm Fire ignited the night of September 7, 2020, south of the Andrews Forest. The fire spread quickly, fueled by strong east winds and very dry conditions. The fire eventually entered Watershed 9, then Watershed 1, and finally...
The Holiday Farm Fire began about 8:30 PM on the night of September 7, 2020, in the town of Rainbow, Oregon, along HWY 126, directly south of the Andrews Forest. The fire spread quickly, fueled by strong east winds and very dry conditions....
The stream cross-section profiles in the Andrews Experimental Forest study (see more at dataset GS002) was established to monitor long-...
The Forests of Oregon Elevation Gradient (FOREG) is a network of large sample plots, established in 2019, within the HJ Andrews Experimental Forest. The FOREG project was designed to dovetail and connect with the long-running Reference Stand...
Stream networks expand and contract seasonally and changes in network connectivity affect transfer of matter and energy across trophic levels. Although many aquatic organisms in headwaters are well adapted to seasonal low flows others may...
Western hemlock dwarf mistletoe (Arceuthobium tsugense subsp. tsugense) is a small, parasitic plant that infects the leaves and branches of its host plant, the western hemlock (Tsuga heterophylla) tree. Within a forest...
The HJ Andrews Experimental Forest Long-Term Ecological Research site contains stands of old-growth forest that are aged at 300 years and older. This gallery of images, taken in 2005 by photographer Tom Iraci with the USFS, features various old-...
HJA Day is the annual field tour of the HJ Andrews Experimental Forest Long-Term Ecological Research site. Field trips and presentations highlight the research, education, and arts and humanities work of the Andrews Forest program.
Heavy snow fell on the Andrews Forest the night of February 24, 2019. The snow, dense and wet, fell fast and accumulated quickly in the crowns of the trees. The weight of the snow toppled trees or snapped out their crowns. The entire region,...
The Andrews Forest Long-Term Ecological Research program includes a long-term soil study. Researchers dig soil pits to measure, weigh, sample, and describe the soil, across multiple locations in the forest and over many years. This photo gallery...
The terrestrial food web dynamics research project focuses on how mammalian carnivores of the Pacific Northwest forest interact with other components of the ecosystem. Specifically, the project aims to understand the ecology of the western...
The Pacific Northwest Permanent Sample Plot Program is a long-term study of forest vegetation across the Pacific Northwest. The program samples 135 plots across a diversity of...
The Long-term Ecological Reflections program creates ongoing occasions for reflection and creative expression, and to collect a record of the...
Oregon State University hosted an NSF-funded program for undergraduate students to conduct research in pollination biology in natural and manipulated ecosystems, beginning summer 2009. Students conducted individual research projects comparing...
Photographs of plants and their pollinators. Images were taken in the high meadows of the Andrews Forest in summer 2018 during the Research Experience for Undergraduates pollinator research project field work. This gallery is a subset of the...
HJA Day is the annual field day at the HJ Andrews Experimental Forest and Long-Term Ecological Research site. HJA Day 2018 happened on June 28, 2018. The event highlighted the 70th anniversary of the 1948 establishment of the HJ Andrews...
Graduate student Karla Jarecke studied how water moves through soil on the steep slopes of Watershed 1 at the Andrews Forest. Karla and an NSF-funded Research Experience for Undergraduate (REU) student, Lauren Roof, dug soil pits to sample and...
Starting in 2017, blogger and photographer Erika Zambello launched a road trip to visit as many LTER sites as possible. Erika visited the Andrews Forest LTER site in May 2018. Erika went high into the canopy of a big Douglas fir tree. She visited...
Stream ecology research on fish and salamanders, including the SCALER project, the Fish-No Fish project, and the long-term Mack Creek Fish and Salamander Survey. Meadow field work including pollinators and the EISI program. Soil moisture...
Phenology is the study of the timing of natural phenomena, especially in relation to climate. At the Andrews Forest, scientists have been studying the timing of bud break and flowering of plants, and relating that timing, across years, to the...
The historical images in this gallery were pulled together for the historical publication by Max Geier (2007) "Necessary...