Publications
This list of publications includes peer-review journal articles, official USGS publications series, reports and more authored by scientists in the Ecosystems Mission Area. A database of all USGS publications, with advanced search features, can be accessed at the USGS Publications Warehouse.
Filter Total Items: 42768
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
Is GPS telemetry location error screening beneficial? Is GPS telemetry location error screening beneficial?
The accuracy of global positioning system (GPS) locations obtained from study animals tagged with GPS monitoring devices has been a concern as to the degree it influences assessments of movement patterns, space use, and resource selection estimates. Many methods have been proposed for screening data to retain the most accurate positions for analysis, based on dilution of precision (DOP)...
Authors
Kirsten E. Ironside, David J. Mattson, Terence R. Arundel, Jered R. Hansen
A hierarchical model for estimating the spatial distribution and abundance of animals detected by continuous-time recorders A hierarchical model for estimating the spatial distribution and abundance of animals detected by continuous-time recorders
Motivation Several spatial capture-recapture (SCR) models have been developed to estimate animal abundance by analyzing the detections of individuals in a spatial array of traps. Most of these models do not use the actual dates and times of detection, even though this information is readily available when using continuous-time recorders, such as microphones or motion-activated cameras...
Authors
Robert Dorazio, K. Ullas Karanth
Characterization of the juvenile green turtle (Chelonia mydas) microbiome throughout an ontogenetic shift from pelagic to neritic habitats Characterization of the juvenile green turtle (Chelonia mydas) microbiome throughout an ontogenetic shift from pelagic to neritic habitats
The gut microbiome of herbivorous animals consists of organisms that efficiently digest the structural carbohydrates of ingested plant material. Green turtles (Chelonia mydas) provide an interesting model of change in these microbial communities because they undergo a pronounced shift from a surface-pelagic distribution and omnivorous diet to a neritic distribution and herbivorous diet...
Authors
James T. Price, Frank V. Paladino, Margaret M. Lamont, Blair E. Witherington, Scott T. Bates, Tanya Soule
Estimating loss of Brucella abortus antibodies from age-specific serological data in elk Estimating loss of Brucella abortus antibodies from age-specific serological data in elk
Serological data are one of the primary sources of information for disease monitoring in wildlife. However, the duration of the seropositive status of exposed individuals is almost always unknown for many free-ranging host species. Directly estimating rates of antibody loss typically requires difficult longitudinal sampling of individuals following seroconversion. Instead, we propose a...
Authors
J. A. Benavides, D. Caillaud, B. M. Scurlock, E. J. Maichak, W.H. Edwards, Paul C. Cross
Long-term and widespread changes in agricultural practices influence ring-necked pheasant abundance in California Long-term and widespread changes in agricultural practices influence ring-necked pheasant abundance in California
Declines in bird populations in agricultural regions of North America and Europe have been attributed to agricultural industrialization, increases in use of agrochemical application, and increased predation related to habitat modification. Based on count data compiled from Breeding Bird Survey (BBS) from 1974 to 2012, Christmas Bird Count (CBC) collected from 1914 to 2013, and hunter...
Authors
Peter S. Coates, Brianne E. Brussee, Kristy B. Howe, Joseph P. Fleskes, Ian Dwight, Daniel P. Connelly, Matt G. Meshriy, Scott C. Gardner
Local and cross-seasonal associations of climate and land use with abundance of monarch butterflies Danaus plexippus Local and cross-seasonal associations of climate and land use with abundance of monarch butterflies Danaus plexippus
Quantifying how climate and land use factors drive population dynamics at regional scales is complex because it depends on the extent of spatial and temporal synchrony among local populations, and the integration of population processes throughout a species’ annual cycle. We modeled weekly, site-specific summer abundance (1994–2013) of monarch butterflies Danaus plexippus at sites across...
Authors
Sarah P. Saunders, Leslie Ries, Karen S. Oberhasuer, Wayne E. Thogmartin, Elise F. Zipkin
Performance and retention of lightweight satellite radio tags applied to the ears of polar bears (Ursus maritimus) Performance and retention of lightweight satellite radio tags applied to the ears of polar bears (Ursus maritimus)
Background Satellite telemetry studies provide information that is critical to the conservation and management of species affected by ecological change. Here we report on the performance and retention of two types (SPOT-227 and SPOT-305A) of ear-mounted Argos-linked satellite transmitters (i.e., platform transmitter terminal, or PTT) deployed on free-ranging polar bears in Eastern...
Authors
Oystein Wiig, Erik W. Born, Kristin L. Laidre, Rune Dietz, Mikkel Villum Jensen, George M. Durner, Anthony M. Pagano, Eric V. Regehr, Michelle St. Martin, Stephen N. Atkinson, Markus Dyck
Habitat degradation affects the summer activity of polar bears Habitat degradation affects the summer activity of polar bears
Understanding behavioral responses of species to environmental change is critical to forecasting population-level effects. Although climate change is significantly impacting species’ distributions, few studies have examined associated changes in behavior. Polar bear (Ursus maritimus) subpopulations have varied in their near-term responses to sea ice decline. We examined behavioral...
Authors
Jasmine V. Ware, Karyn D. Rode, Jeffrey F. Bromaghin, David C. Douglas, Ryan H. Wilson, Eric V. Regehr, Steven C. Amstrup, George M. Durner, Anthony M. Pagano, Jay Olson, Charles T. Robbins, Heiko T Jansen
Predicting wading bird and aquatic faunal responses to ecosystem restoration scenarios Predicting wading bird and aquatic faunal responses to ecosystem restoration scenarios
In large-scale conservation decisions, scenario planning identifies key uncertainties of ecosystem function linked to ecological drivers affected by management, incorporates ecological feedbacks, and scales up to answer questions robust to alternative futures. Wetland restoration planning requires an understanding of how proposed changes in surface hydrology, water storage, and landscape
Authors
James M. Beerens, Joel C. Trexler, Christopher P. Catano
Upper thermal limits of growth in brook trout and their relationship to stress physiology Upper thermal limits of growth in brook trout and their relationship to stress physiology
Despite the threat of climate change, the physiological mechanisms responsible for reduced performance at high temperatures remain unclear for most species. Elevated but sublethal temperatures may act via endocrine and cellular stress responses to limit performance in important life-history traits such as growth. Here, brook trout (Salvelinus fontinalis) subjected to chronically elevated...
Authors
Joseph G Chadwick, Stephen D. McCormick
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