Skip to main content
U.S. flag

An official website of the United States government

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: 3984

Evaluating artificial shelter arrays as a minimally invasive monitoring tool for the hellbender Cryptobranchus alleganiensis

Hellbenders Cryptobranchus alleganiensis are critically imperiled amphibians throughout the eastern USA. Rock-lifting is widely used to monitor hellbenders but can severely disturb habitat. We asked whether artificial shelter occupancy (the proportion of occupied shelters in an array) would function as a proxy for hellbender abundance and thereby serve as a viable alternative to rock-lifting. We h
Authors
C. M. Bodinof Jachowski, Beth Ross, W.A. Hopkins

Quantifying harvestable fish and crustacean production and associated economic values provided by oyster reefs

Quantifying ecosystem services can provide information to justify conservation and restoration decisions so as to allocate limited resources effectively. Consequently, decision makers and public typically ask for simple and understandable information with confidence regarding the availability of the services and the probable economic value. Here, we compiled published information on density enhanc
Authors
QT Lai, Elise R. Irwin, Yawen Zhang

Ratcheting up rigor in wildlife management decision making

The wildlife management institution has been transforming to ensure relevance and positive conservation outcomes into the future. Continuous improvement of decision making is one aspect of this transformation, but many obstacles hinder systematic approaches to decision making. One can point to examples of formal decision science applications by state and federal agencies in the United States, but
Authors
Angela K. Fuller, Daniel J. Decker, Michael V. Schiavone, Ann Forstchen

Linking monitoring and data analysis to predictions and decisions for the range-wide eastern black rail status assessment

 The US Fish and Wildlife Service has initiated a re-envisioned approach for providing decision makers with the best available science and synthesis of that information, called the Species Status Assessment (SSA), for endangered species decision making. The SSA report is a descriptive document that provides decision makers with an assessment of a species’ current status and predicted future status
Authors
Conor P. McGowan, N. Angeli, W. Beisler, C.W. Snyder, N.M. Rankin, J. Woodrow, J. Wilson, E. Rivenbark, A. Schwarzer, C. Hand, R.M. Anthony, R. Griffin, K. Barrett, A. Haverland, N. Roach, T. Schneider, A. J. Smith, F. Smith, J. Tolliver, Bryan D Watts

Identification of factors affecting predation risk for juvenile turtles using 3D printed models

Although it is widely accepted that juvenile turtles experience high levels of predation, such events are rarely observed, providing limited evidence regarding predator identities and how juvenile habitat selection and availability of sensory cues to predators affects predation risk. We placed three-dimensional printed models resembling juvenile box turtles (Terrapene carolina) across habitats com
Authors
S.J. Tetzlaff, A. Estrada, Brett Alexander DeGregorio, J. H. Sperry

Inexpensive, underwater filming of rare fishes in high definition

Generating public interest in fish and their biology is often challenging. Many aquatic species are cryptic and largely invisible to the public. Therefore, increasing public awareness of cryptic fishes and elevating their visibility to broad audiences requires innovation. Inexpensive technological advancements now provide fisheries biologists, managers, and researchers with means never before poss
Authors
Scott A. Bonar, Taylor Ulrich

Assessing establishment and growth of agricultural plantings on reservoir mudflats

Winter drawdowns in flood control reservoirs create expansive mudflats that lack the vegetation typical of littoral zones, which reduces the amount of structure available for fish habitat. This study investigated the feasibility of establishing agricultural plantings as a management action to ameliorate mudflats by providing structural cover following reservoir refilling. We tested cool-season ann
Authors
D. M. Norris, H.R. Hatcher, M. E. Colvin, G. Coppola, M. A. Lashley, Leandro E. Miranda

Modelling pinniped abundance and distribution by combining counts at terrestrial sites and in-water sightings

Pinnipeds are commonly monitored using aerial photographic surveys at land- or ice-based sites, where animals come ashore for resting, pupping, molting, and to avoid predators. Although these counts form the basis for monitoring population change over time, they do not provide information regarding where animals occur in the water, which is often of management and conservation interest. In this st
Authors
Steven L. Whitlock, Jamie N. Womble, James Peterson

Estuarine submerged aquatic vegetation habitat provides organic carbon storage across a shifting landscape

Submerged aquatic vegetation (SAV) thrives across the estuarine salinity gradient providing valuable ecosystem services. Within the saline portion of estuaries, seagrass areas are frequently cited as hotspots for their role in capturing and retaining organic carbon (Corg). Non-seagrass SAV, located in the fresh to brackish estuarine areas, may also retain significant soil Corg, yet their role rema
Authors
E. R. Hillman, V. H. Rivera-Monroy, A. J. Nyman, Megan K. La Peyre

Water quality and ecological risk assessment of intermittent streamflow through mining and urban areas of San Marcos River sub-basin, Mexico

Intermittent rivers are becoming more ecologically stressed worldwide. Flow cessation occurs naturally and spatiotemporally in these systems and anthropogenic activities such as wastewater discharges can have considerable impacts. Public entities mostly monitor water quality in permanent streams, leading to insufficient monitoring of intermittent streams and consequently to their potentially inade
Authors
Elisenda López, Reynaldo Patiño, Maria L. Vázquez-Sauceda, Roberto Pérez-Castañeda, Leonardo U. Arellano-Méndez, Rene Ventura-Houle, Lorenzo Heyer

The influence of groundwater on the population size and total length of warmwater stream fishes

Groundwater influences stream environments in numerous ways including structuring biotic assemblages. However, associations between groundwater influence and warmwater fish assemblages are under-studied. We examined relationships between groundwater contribution, population size, and total length (TL) for 5 warmwater fishes at 32 stream reaches in the Ozark Highlands ecoregion. When we controlled
Authors
Robert Mollenhauer, Andrew D. Miller, Josh Goff, Shannon K. Brewer