Publications
Filter Total Items: 2000
A heuristic method to evaluate consequences for flight control and stability induced by attachment of biologging devices to birds and bats
Biologging is central to the study of wildlife, but questions remain about the minimization of effects of biologging devices. Rarely considered are changes biologging devices induce on an animal's centre of mass (COM) and resulting losses of flight control and stability.We applied established aeronautical principles to estimate how the COM of a flying bird or bat may be affected by the typical pos
Authors
Todd E. Katzner, George Young
Spatial patterns of seed removal by harvester ants in a seed tray experiment
Using a selection of native grass and forb seeds commonly seeded in local restoration projects, we conducted a field experiment to evaluate the effects of seed species, distance of seed patches from nests, and distance between patches on patterns of seed removal by Owyhee harvester ants, Pogonomyrmex salinus (Olsen) (Hymenoptera: Formicidae). To provide context for ants’ seed preferences, we evalu
Authors
Michaela Ray Grossklaus, David Pilliod, Trevor Caughlin, Ian C. Robertson
Environmental drivers and spatial patterns of antibiotic-resistant, enteric coliforms across a forest–urban riverscape
Antibiotic resistant bacteria are prevalent environmental contaminants in freshwaters, and antibiotic resistance genes circulate throughout the urban water cycle. The increase of antibiotic resistant pathogens threatens public health through direct and indirect exposure, and natural resource managers need information on the spatial patterns of antibiotic resistant bacteria and environmental factor
Authors
Angela M Klock, Christian E. Torgersen, Marilyn C Roberts, Daniel J Vogt, Kristiina A Vogt
Annual migratory movement, apparent molt-migration, migration schedule, and diffuse migratory connectivity of Hermit Warblers
Quantifying migratory connectivity and annual movement is key to sound conservation planning for migratory species. Hermit Warblers (Setophaga occidentalis) are an endemic-breeding species in the Pacific Northwest that winters in Mexico and the Central Americas. This species faces threats from mature forest loss and climate change throughout its range, but we know little about its migration ecolog
Authors
Hankyu Kim, Rodney Siegel, Jaime L Stephens, Joan Hagar, Brett Furnas, Min-Su Jeong, Brenda C McComb, Matthew G. Betts
Wildfires influence mercury transport, methylation, and bioaccumulation in headwater streams of the Pacific Northwest
The increasing frequency and severity of wildfires are among the most visible impacts of climate change. However, the effects of wildfires on mercury (Hg) transformations and bioaccumulation in stream ecosystems are poorly understood. We sampled soils, water, sediment, in-stream leaf litter, periphyton, and aquatic invertebrates in 36 burned (one-year post fire) and 21 reference headwater streams
Authors
Austin K. Baldwin, James Willacker, Branden L. Johnson, Sarah E. Janssen, Collin Eagles-Smith
Assisted migration of coho salmon: Influences of passage and habitat availability on population dynamics
Assisted migration is a means of introducing a species into a previously unoccupied area. Although this idea is relatively new for many species, there are many extant examples involving fish that can be instructive. We studied a case of assisted migration where upstream access of migrating adult coho salmon Oncorhynchus kisutch over a naturally impassible barrier was established through constructi
Authors
Joseph R. Benjamin, Jason B. Dunham, Nicholas Scheidt, Carla Rothenbuecher, Cory Sipher
Mercury concentrations in Seaside Sparrows and Marsh Rice Rats differ across the Mississippi River Estuary
Mercury (Hg) concentrations and their associated toxicological effects in terrestrial ecosystems of the Gulf of Mexico are largely unknown. Compounding this uncertainty, a large input of organic matter from the 2010 Deepwater Horizon oil spill may have altered Hg cycling and bioaccumulation dynamics. To test this idea, we quantified blood concentrations of total mercury (THg) in Seaside Sparrows (
Authors
Andrea Bonisoli-Alquati, Allyson K. Jackson, Collin Eagles-Smith, Sydney Moyo, Anna A. Pérez-Umphre, Michael J. Polito, Allison M. Snider, S. Tyler Williams, Stefan Woltmann, Philip C. Stouffer, Sabrina S. Taylor
The dynamic feasibility of resisting (R), accepting (A), or directing (D) ecological change
Ecological transformations are occurring as a result of climate change, challenging traditional approaches to land management decision-making. The resist–accept–direct (RAD) framework helps managers consider how to respond to this challenge. We examined how the feasibility of the choices to resist, accept, and direct shifts in complex and dynamic ways through time. We considered 4 distinct types o
Authors
Amanda E. Cravens, Katherine R. Clifford, Corrine N. Knapp, William Travis
Restoring Pacific Lamprey in the Umpqua River Basin of Oregon: A workshop summary
The Umpqua River Basin in southwestern Oregon (Figure 1) is part of the lands inhabited by the Cow Creek Band of Umpqua Tribe of Indians and an area of active co-management authority. This Basin supports a unique fish fauna, including important populations of Pacific salmon (Oncorhynchus spp.) and steelhead (O. mykiss), and other native fishes that are endemic to the region (Mims et al. 2018). Amo
Authors
Jason B. Dunham, Krista Jones, Kelly C. Coates, Travis Mackie
Carbon isotope trends across a century of herbarium specimens suggest CO2 fertilization of C4 grasses.
Increasing atmospheric CO2 is changing the dynamics of tropical savanna vegetation. C3 trees and grasses are known to experience CO2 fertilization, whereas responses to CO2 by C4 grasses are more ambiguous.Here, we sample stable carbon isotope trends in herbarium collections of South African C4 and C3 grasses to reconstruct 13C discrimination.We found that C3 grasses showed no trends in 13C discri
Authors
Isa del Toro, Madelon Florence Case, Allison Karp, Jasper Slingsby, A. Carla Staver
Structural heterogeneity predicts ecological resistance and resilience to wildfire in arid shrublands
ContextDynamic feedbacks between physical structure and ecological function drive ecosystem productivity, resilience, and biodiversity maintenance. Detailed maps of canopy structure enable comprehensive evaluations of structure–function relationships. However, these relationships are scale-dependent, and identifying relevant spatial scales to link structure to function remains challenging.Objectiv
Authors
Andrii Zaiats, Megan E Cattau, David Pilliod, Rongsong Liu, Patricia Kaye T. Dumandan, Ahmad Hojatimalekshah, Donna M. Delparte, Trevor Caughlin
Browsing the literature
For this edition of Browsing the Literature, we have two new papers from Rangeland Ecology & Management, a series of basic ecology papers with an international scope from journals such as the Proceedings of the National Academy of Sciences (USA), Science, and Nature, and several papers advancing our understanding of drought and carbon at global scales. Additionally, several papers on sagebrush-st
Authors
Matthew Germino