Publications
Filter Total Items: 2068
Exploring the role of cryptic nitrogen fixers in terrestrial ecosystems: A frontier in nitrogen cycling research Exploring the role of cryptic nitrogen fixers in terrestrial ecosystems: A frontier in nitrogen cycling research
Biological nitrogen fixation represents the largest natural flux of new nitrogen (N) into terrestrial ecosystems, providing a critical N source to support net primary productivity of both natural and agricultural systems. When they are common, symbiotic associations between plants and bacteria can add more than 100 kg N ha−1 y−1 to ecosystems. Yet, these associations are uncommon in many
Authors
Cory Cleveland, Carla R. G. Reis, Steven Perakis, Katherine A Dynarski, Sarah Batterman, Timothy Crews, Maga Gei, Michael Gundale, Duncan Menge, Mark Peoples, Sasha C. Reed, Verity Salmon, Fiona M. Soper, Benton Taylor, Monica Turner, Nina Wurzburger
A review of supervised learning methods for classifying animal behavioural states from environmental features A review of supervised learning methods for classifying animal behavioural states from environmental features
Accurately predicting behavioural modes of animals in response to environmental features is important for ecology and conservation. Supervised learning (SL) methods are increasingly common in animal movement ecology for classifying behavioural modes. However, few examples exist of applying SL to classify polytomous animal behaviour from environmental features especially in the context of...
Authors
Silas Bergen, Manuela Huso, Adam E. Duerr, Missy A Braham, Sara Schmuecker, Tricia A. Miller, Todd E. Katzner
Tough places and safe spaces: Can refuges save salmon from a warming climate? Tough places and safe spaces: Can refuges save salmon from a warming climate?
The importance of thermal refuges in a rapidly warming world is particularly evident for migratory species, where individuals encounter a wide range of conditions throughout their lives. In this study, we used a spatially explicit, individual-based simulation model to evaluate the buffering potential of cold-water thermal refuges for anadromous salmon and trout (Oncorhynchus spp.)...
Authors
Marcia N. Snyder, Nathan H. Schumaker, Jason B. Dunham, Joseph L. Ebersole, Mathew L Keefer, Jonathan Halama, Randy L Comeleo, Peter Leinenbach, Allen Brookes, Ben Cope, Jennifer Wu, John Palmer
Passage of adult coho salmon (Oncorhynchus kisutch) over Lake Creek Falls, Oregon, 2019 Passage of adult coho salmon (Oncorhynchus kisutch) over Lake Creek Falls, Oregon, 2019
Across the Pacific Northwest, there are many examples of artificial structures created to allow passage of upstream-migrating salmon over natural barriers. We studied upstream passage across three structures installed in 1989 to allow passage of salmon over Lake Creek Falls, a series of three natural waterfalls at the outlet of Triangle Lake on Lake Creek, in the central Oregon Coast...
Authors
Reed B. Fischer, Jason B. Dunham, Nicholas Scheidt, Amy C. Hansen, Emily D. Heaston
Plant community trajectories following livestock exclusion for conservation vary and hinge on initial invasion and soil-biocrust conditions in shrub steppe Plant community trajectories following livestock exclusion for conservation vary and hinge on initial invasion and soil-biocrust conditions in shrub steppe
Adjustments or complete withdrawal of livestock grazing are among the most common conservation actions in semiarid uplands, but outcomes can vary considerably with ecological context. Invasion by exotic annual grasses and the excessive wildfire they promote are increasing threats to semiarid shrub-steppe, and plant-community response to livestock exclusion in these areas may be...
Authors
Matthew J. Germino, Chad Raymond Kluender, Christopher R. Anthony
Long-billed Curlew Long-billed Curlew
No abstract available.
Authors
Elise Elliott-Smith, Susan M Haig
Barred Owl history in Oregon Barred Owl history in Oregon
No abstract available.
Authors
David Wiens
Black Oystercatchers Black Oystercatchers
No abstract available.
Authors
Elise Elliott-Smith, Joe Liebezeit
Contaminant studies in Oregon Contaminant studies in Oregon
No abstract available.
Authors
Charles J. Henny
Limited rigor in studies of raptor mortality and mitigation at wind power facilities Limited rigor in studies of raptor mortality and mitigation at wind power facilities
Wind power is an expanding source of renewable energy. However, there are ecological challenges related to wind energy generation, including collisions of wildlife with turbines. Lack of rigor, and variation in study design, together limit efforts to understand the broad-scale effects of wind power infrastructure on wildlife populations. It is not clear, however, whether these types of...
Authors
Tara Conkling, Christopher J. W. McClure, Sandra Cuadros, S. R. Loss, Todd E. Katzner
Level and pattern of overstory retention shape the abundance and long-term dynamics of natural and created snags Level and pattern of overstory retention shape the abundance and long-term dynamics of natural and created snags
Standing dead trees, or snags, serve myriad functions in natural forests, but are often scarce in forests managed for timber production. Variable retention (VR), the retention of live and dead trees through harvest, has been adopted globally as a less intensive form of regeneration harvest. In this study, we explore how two key elements of VR systems — level (amount) and spatial pattern...
Authors
Charles B. Halpern, Allison K. Rossman, Joan Hagar