Publications
Browse publications authored by our scientists. Publications available are: USGS-authored journal articles, series reports, book chapters, other government publications, and more.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Filter Total Items: 5125
Evidence for density dependence in foraging and migratory behavior of a subtropical nearshore seabird Evidence for density dependence in foraging and migratory behavior of a subtropical nearshore seabird
Density-dependent competition for food resources influences both foraging ecology and reproduction in a variety of animals. The relationship between colony size, local prey depletion, and reproductive output in colonial central-place foragers has been extensively studied in seabirds; however, most studies have focused on effects of intraspecific competition during the breeding season...
Authors
Juliet S. Lamb, Yvan G. Satge, Patrick G.R. Jodice
Fish Bioenergetics 4.0: An R-based modeling application Fish Bioenergetics 4.0: An R-based modeling application
Bioenergetics modeling is a widely used tool in fisheries management and research. Although popular, currently available software (i.e., Fish Bioenergetics 3.0) has not been updated in over 20 years and is incompatible with newer operating systems (i.e., 64‐bit). Moreover, since the release of Fish Bioenergetics 3.0 in 1997, the number of published bioenergetics models has increased...
Authors
David Deslauriers, Steven R. Chipps, James E. Breck, James A. Rice, Charles P. Madenjian
Diet composition and provisioning rates of nestlings determine reproductive success in a subtropical seabird Diet composition and provisioning rates of nestlings determine reproductive success in a subtropical seabird
Understanding how both quality and quantity of prey affect the population dynamics of marine predators is a crucial step toward predicting the effects of environmental perturbations on population-level processes. The Junk Food Hypothesis, which posits that energetic content of prey species may influence reproductive capacity of marine top predators regardless of prey availability, has...
Authors
Juliet S. Lamb, Patrick G.R. Jodice, Yvan G. Satge
Estimating occupancy and abundance using aerial images with imperfect detection Estimating occupancy and abundance using aerial images with imperfect detection
Species distribution and abundance are critical population characteristics for efficient management, conservation, and ecological insight. Point process models are a powerful tool for modelling distribution and abundance, and can incorporate many data types, including count data, presence-absence data, and presence-only data. Aerial photographic images are a natural tool for collecting...
Authors
Perry J. Williams, Mevin Hooten, Jamie N. Womble, Michael R. Bower
Recruitment phenology and pelagic larval duration in Caribbean amphidromous fishes Recruitment phenology and pelagic larval duration in Caribbean amphidromous fishes
Amphidromous fishes are major components of oceanic tropical island stream ecosystems, such as those of the Caribbean island, Puerto Rico. Fishes with this life history face threats related to the requirement for connectivity between freshwater and marine environments during early life stages. Pelagic larval duration and recruitment phenology are 2 early life-history processes that are...
Authors
Augustin C. Engman, Thomas J. Kwak, Jesse R. Fischer
Integrating the effects of salinity on the physiology of the eastern oyster, Crassostrea virginica, in the northern Gulf of Mexico through a Dynamic Energy Budget model Integrating the effects of salinity on the physiology of the eastern oyster, Crassostrea virginica, in the northern Gulf of Mexico through a Dynamic Energy Budget model
We present a Dynamic Energy Budget (DEB) model for the eastern oyster, Crassostrea virginica, which enables the inclusion of salinity as a third environmental variable, on top of the standard foodr and temperature variables. Salinity changes have various effects on the physiology of oysters, potentially altering filtration and respiration rates, and ultimately impacting growth...
Authors
Romain Lavaud, Megan K. LaPeyre, Sandra M. Casas, C. Bacher, Jerome F. La Peyre
Responses of terrestrial herpetofauna to persistent, novel ecosystems resulting from mountaintop removal mining Responses of terrestrial herpetofauna to persistent, novel ecosystems resulting from mountaintop removal mining
Mountaintop removal mining is a large-scale surface mining technique that removes entire floral and faunal communities, along with soil horizons located above coal seams. In West Virginia, the majority of this mining occurs on forested mountaintops. However, after mining ceases the land is typically reclaimed to grasslands and shrublands, resulting in novel ecosystems. In this study, we...
Authors
Jennifer M. Williams, Donald J. Brown, Petra B. Wood
Bipartite networks improve understanding of effects of waterbody size and angling method on angler–fish interactions Bipartite networks improve understanding of effects of waterbody size and angling method on angler–fish interactions
Networks used to study interactions could provide insights to fisheries. We compiled data from 27 297 interviews of anglers across waterbodies that ranged in size from 1 to 12 113 ha. Catch rates of fish species among anglers grouped by species targeted generally differed between angling methods (bank or boat). We constructed angler–catch bipartite networks (angling method specific)...
Authors
Christopher J. Chizinski, Dustin R. Martin, Daizaburo Shizuka, Kevin L. Pope
Fuel-reduction management alters plant composition, carbon and nitrogen pools, and soil thaw in Alaskan boreal forest Fuel-reduction management alters plant composition, carbon and nitrogen pools, and soil thaw in Alaskan boreal forest
Increasing wildfire activity in Alaska's boreal forests has led to greater fuel-reduction management. Management has been implemented to reduce wildfire spread, but the ecological impacts of these practices are poorly known. We quantified the effects of hand-thinning and shearblading on above- and belowground stand characteristics, plant species composition, carbon (C) and nitrogen (N)...
Authors
April M. Melvin, Gerardo Celis, Jill F. Johnstone, A. David McGuire, Helene Genet, Edward A.G. Schuur, T. Scott Rupp, Michelle C. Mack
Free-ranging domestic cats (Felis catus) on public lands: estimating density, activity, and diet in the Florida Keys Free-ranging domestic cats (Felis catus) on public lands: estimating density, activity, and diet in the Florida Keys
Feral and free-ranging domestic cats (Felis catus) can have strong negative effects on small mammals and birds, particularly in island ecosystems. We deployed camera traps to study free-ranging cats in national wildlife refuges and state parks on Big Pine Key and Key Largo in the Florida Keys, USA, and used spatial capture–recapture models to estimate cat abundance, movement, and...
Authors
Michael V. Cove, Beth Gardner, Theodore R. Simons, Roland Kays, Allan F. O’Connell
Apparent annual survival estimates of tropical songbirds better reflect life history variation when based on intensive field methods Apparent annual survival estimates of tropical songbirds better reflect life history variation when based on intensive field methods
Aim Adult survival is central to theories explaining latitudinal gradients in life history strategies. Life history theory predicts higher adult survival in tropical than north temperate regions given lower fecundity and parental effort. Early studies were consistent with this prediction, but standard-effort netting studies in recent decades suggested that apparent survival rates in...
Authors
Thomas E. Martin, Margaret M. Riordan, Rimi Repin, James C. Mouton, William M. Blake
Evaluating trade-offs in bull trout reintroduction strategies using structured decision making Evaluating trade-offs in bull trout reintroduction strategies using structured decision making
Structured decision making allows reintroduction decisions to be made despite uncertainty by linking reintroduction goals with alternative management actions through predictive models of ecological processes. We developed a decision model to evaluate the trade-offs between six bull trout (Salvelinus confluentus) reintroduction decisions with the goal of maximizing the number of adults in...
Authors
William R. Brignon, James T. Peterson, Jason B. Dunham, Howard A. Schaller, Carl B. Schreck