Publications
Filter Total Items: 2071
Intraspecific variability and reaction norms of forest understory plant species traits Intraspecific variability and reaction norms of forest understory plant species traits
Trait-based models of ecological communities typically assume intraspecific variation in functional traits is not important, though such variation can change species trait rankings along gradients in resources and environmental conditions, and thus influence community structure and function. We examined the degree of intraspecific relative to interspecific variation, and reaction norms...
Authors
Julia I. Burton, Steven S. Perakis, Sean C. McKenzie, Caitlin E. Lawrence, Klaus J. Puettmann
Envisioning, quantifying, and managing thermal regimes on river networks Envisioning, quantifying, and managing thermal regimes on river networks
Water temperatures fluctuate in time and space, creating diverse thermal regimes on river networks. Temporal variability in these thermal landscapes has important biological and ecological consequences because of nonlinearities in physiological reactions; spatial diversity in thermal landscapes provides aquatic organisms with options to maximize growth and survival. However, human...
Authors
E. Ashley Steel, Timothy J. Beechie, Christian E. Torgersen, Aimee H. Fullerton
Guidelines for evaluation and treatment of lead poisoning of wild raptors Guidelines for evaluation and treatment of lead poisoning of wild raptors
Lead poisoning is a threat to birds, particularly scavenging birds of prey. With the availability of portable lead-testing kits, an increasing number of field researchers are testing wild-caught birds, in situ, for lead poisoning. We describe guidelines for evaluation of lead toxicity in wild raptors by outlining field testing of blood-lead concentrations, presenting criteria for...
Authors
Jesse A. Fallon, Patrick Redig, Tricia A. Miller, Michael J. Lanzone, Todd E. Katzner
Aerodynamic roughness length estimation with lidar and imaging spectroscopy in a shrub-dominated dryland Aerodynamic roughness length estimation with lidar and imaging spectroscopy in a shrub-dominated dryland
The aerodynamic roughness length (Z0 m) serves an important role in the flux exchange between the land surface and atmosphere. In this study, airborne lidar (ALS), terrestrial lidar (TLS), and imaging spectroscopy data were integrated to develop and test two approaches to estimate Z0 m over a shrub dominated dryland study area in south-central Idaho, USA. Sensitivity of the two...
Authors
Aihua Li, Wenguang Zhao, Jessica J Mitchell, Nancy F. Glenn, Matthew J. Germino, Joel B. Sankey, Richard M. Allen
Declines in low-elevation subalpine tree populations outpace growth in high-elevation populations with warming Declines in low-elevation subalpine tree populations outpace growth in high-elevation populations with warming
Species distribution shifts in response to climate change require that recruitment increase beyond current range boundaries. For trees with long life spans, the importance of climate-sensitive seedling establishment to the pace of range shifts has not been demonstrated quantitatively.Using spatially explicit, stochastic population models combined with data from long-term forest surveys...
Authors
Erin Conlisk, Cristina Castanha, Matthew J. Germino, Thomas T. Veblen, Jeremy M. Smith, Lara M. Kueppers
Estimating inbreeding rates in natural populations: Addressing the problem of incomplete pedigrees Estimating inbreeding rates in natural populations: Addressing the problem of incomplete pedigrees
Understanding and estimating inbreeding is essential for managing threatened and endangered wildlife populations. However, determination of inbreeding rates in natural populations is confounded by incomplete parentage information. We present an approach for quantifying inbreeding rates for populations with incomplete parentage information. The approach exploits knowledge of pedigree...
Authors
Mark P. Miller, Susan M. Haig, Jonathan D. Ballou, E. Ashley Steel
Mechanisms of nitrogen deposition effects on temperate forest lichens and trees Mechanisms of nitrogen deposition effects on temperate forest lichens and trees
We review the mechanisms of deleterious nitrogen (N) deposition impacts on temperate forests, with a particular focus on trees and lichens. Elevated anthropogenic N deposition to forests has varied effects on individual organisms depending on characteristics both of the N inputs (form, timing, amount) and of the organisms (ecology, physiology) involved. Improved mechanistic knowledge of...
Authors
Therese S. Carter, Christopher L. Clark, Mark E. Fenn, Sarah E. Jovan, Steven S. Perakis, Jennifer Riddell, Paul G. Schaberg, Tara Greaver, Meredith Hastings
Exploring the use of environmental DNA to determine the species of salmon redds Exploring the use of environmental DNA to determine the species of salmon redds
Annual redd counts are used to monitor the status and trends of salmonid populations, but methods to easily and reliably determine which of sympatric species made specific redds are lacking. We explored whether environmental DNA (eDNA) analysis might prove useful for determining the species of salmon redds. We collected eDNA samples from the interstitial spaces of redds of Chinook Salmon
Authors
Burke Strobel, Matthew Laramie, David S. Pilliod
Thermal effect of climate change on groundwater-fed ecosystems Thermal effect of climate change on groundwater-fed ecosystems
Groundwater temperature changes will lag surface temperature changes from a changing climate. Steady state solutions of the heat-transport equations are used to identify key processes that control the long-term thermal response of springs and other groundwater discharge to climate change, in particular changes in (1) groundwater recharge rate and temperature and (2) land-surface...
Authors
Erick R. Burns, Yonghui Zhu, Hongbin Zhan, Michael Manga, Colin F. Williams, Steven E. Ingebritsen, Jason B. Dunham
Using decision analysis to support proactive management of emerging infectious wildlife diseases Using decision analysis to support proactive management of emerging infectious wildlife diseases
Despite calls for improved responses to emerging infectious diseases in wildlife, management is seldom considered until a disease has been detected in affected populations. Reactive approaches may limit the potential for control and increase total response costs. An alternative, proactive management framework can identify immediate actions that reduce future impacts even before a disease...
Authors
Evan H. Campbell Grant, Erin L. Muths, Rachel A. Katz, Stefano Canessa, M. J. Adams, Jennifer R. Ballard, Lee Berger, Cheryl J. Briggs, Jeremy T. H. Coleman, Matthew J. Gray, M. Camille Harris, Reid N. Harris, Blake R. Hossack, Kathryn P. Huyvaert, Jonathan E. Kolby, Karen R. Lips, Robert E. Lovich, Hamish I. McCallum, Joseph R. Mendelson, Priya Nanjappa, Deanna H. Olson, Jenny G. Powers, Katherine L. D. Richgels, Robin E. Russell, Benedikt R. Schmidt, Annemarieke Spitzen-van der Sluijs, Mary Kay Watry, Douglas C. Woodhams, C. LeAnn White
Biotelemetery data for golden eagles (Aquila chrysaetos) captured in coastal southern California, February 2016–February 2017 Biotelemetery data for golden eagles (Aquila chrysaetos) captured in coastal southern California, February 2016–February 2017
Because of a lack of clarity about the status of golden eagles (Aquila chrysaetos) in coastal southern California, the USGS, in collaboration with local, State, and other Federal agencies, began a multi-year survey and tracking program of golden eagles to address questions regarding habitat use, movement behavior, nest occupancy, genetic population structure, and human impacts on eagles...
Authors
Jeff A. Tracey, Melanie C. Madden, Jeremy B. Sebes, Peter H. Bloom, Todd E. Katzner, Robert N. Fisher
Large wood and in-stream habitat for juvenile coho salmon and larval lampreys in a Pacific Northwest stream Large wood and in-stream habitat for juvenile coho salmon and larval lampreys in a Pacific Northwest stream
The influences of large wood on Pacific salmon are well-studied, but studies of nonsalmonid species such as lampreys are uncommon. To address this need, we evaluated the potential effects of large wood on larval lampreys (Pacific Lamprey, Entosphenus tridentatus; and potentially Western Brook Lamprey Lampetra richardsoni), as well as juvenile Coho Salmon Oncorhynchus kisutch, in a small...
Authors
Rosalinda Gonzalez, Jason B. Dunham, Scott W. Lightcap, Jeffery R. McEnroe