Publications
Filter Total Items: 1990
Demographic consequences of nest box use for Red-footed Falcons Falco vespertinus in Central Asia
Nest box programs are frequently implemented for the conservation of cavity-nesting birds, but their effectiveness is rarely evaluated in comparison to birds not using nest boxes. In the European Palearctic, Red-footed Falcon Falco vespertinus populations are both of high conservation concern and are strongly associated with nest box programs in heavily managed landscapes. We used a 21-year monito
Authors
Evgeny A. Bragin, Alexander E. Bragin, Todd E. Katzner
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 of 11 functi
Authors
Julia I. Burton, Steven Perakis, Sean C. McKenzie, Caitlin E. Lawrence, Klaus J. Puettmann
Nutrient feedbacks to soil heterotrophic nitrogen fixation in forests
Multiple nutrient cycles regulate biological nitrogen (N) fixation in forests, yet long-term feedbacks between N-fixation and coupled element cycles remain largely unexplored. We examined soil nutrients and heterotrophic N-fixation across a gradient of 24 temperate conifer forests shaped by legacies of symbiotic N-fixing trees. We observed positive relationships among mineral soil pools of N, carb
Authors
Steven Perakis, Julie C. Pett-Ridge, Christina E. Catricala
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 parameterization me
Authors
Aihua Li, Wenguang Zhao, Jessica J Mitchell, Nancy F. Glenn, Matthew J. Germino, Joel B. Sankey, Richard M. Allen
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 activities and
Authors
E. Ashley Steel, Timothy J. Beechie, Christian E. Torgersen, Aimee H. Fullerton
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 removing a lead-p
Authors
Jesse A. Fallon, Patrick Redig, Tricia A. Miller, Michael J. Lanzone, Todd Katzner
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, we explore
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
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 configurations
Authors
Mark P. Miller, Susan M. Haig, Jonathan D. Ballou, E. Ashley Steel
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 these effe
Authors
Therese S. Carter, Christopher L. Clark, Mark E. Fenn, Sarah E. Jovan, Steven Perakis, Jennifer Riddell, Paul G. Schaberg, Tara Greaver, Meredith Hastings
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 Oncorhync
Authors
Burke Strobel, Matthew Laramie, David S. Pilliod
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 temperature transm
Authors
Erick 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
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 is detect
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