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
AMModels: An R package for storing models, data, and metadata to facilitate adaptive management AMModels: An R package for storing models, data, and metadata to facilitate adaptive management
Agencies are increasingly called upon to implement their natural resource management programs within an adaptive management (AM) framework. This article provides the background and motivation for the R package, AMModels. AMModels was developed under R version 3.2.2. The overall goal of AMModels is simple: To codify knowledge in the form of models and to store it, along with models...
Authors
Therese M. Donovan, Jonathan Katz
The potential of unmanned aerial systems for sea turtle research and conservation: a review and future directions The potential of unmanned aerial systems for sea turtle research and conservation: a review and future directions
The use of satellite systems and manned aircraft surveys for remote data collection has been shown to be transformative for sea turtle conservation and research by enabling the collection of data on turtles and their habitats over larger areas than can be achieved by surveys on foot or by boat. Unmanned aerial vehicles (UAVs) or drones are increasingly being adopted to gather data, at...
Authors
Alan F. Rees, Larisa Avens, Katia Ballorain, Elizabeth Bevan, Annette C. Broderick, Raymond R. Carthy, Marjolijn J. A. Christianen, Gwenael Duclos, Michael R. Heithaus, David W. Johnston, Jeffrey C. Mangel, Frank V. Paladino, Kellie Pendoley, Richard D. Reina, Nathan J. Robinson, Robert Ryan, Seth T. Sykora-Bodie, Dominic Tilley, Miguel R. Varela, Elizabeth R. Whitman, Paul A. Whittock, Thane Wibbels, Brendan J. Godley
Potential Longnose Darter population in the Kiamichi River of Oklahoma Potential Longnose Darter population in the Kiamichi River of Oklahoma
No abstract available.
Authors
C.T. Holley, James M. Long
Seasonal trophic variation of yellow perch exceeds spatial variation in a large lake basin Seasonal trophic variation of yellow perch exceeds spatial variation in a large lake basin
Trophic structuring of complex food webs may vary at multiple spatial and temporal scales, both in terms of direct trophic connections and underlying energy pathways that support production. In large freshwater systems, the prey and primary producers that support individual higher-order consumers may vary across seasons and habitats due to differences in food availability, predator...
Authors
Allison R. Hrycik, Paris D. Collingsworth, Mark W. Rogers, Samuel C. Guffey, Tomas O. Hook
Resilience concepts in psychiatry demonstrated with bipolar disorder Resilience concepts in psychiatry demonstrated with bipolar disorder
Background The term resilience describes stress–response patterns of subjects across scientific disciplines. In ecology, advances have been made to clearly distinguish resilience definitions based on underlying mechanistic assumptions. Engineering resilience (rebound) is used for describing the ability of subjects to recover from adverse conditions (disturbances), and is the rate of...
Authors
David G. Angeler, Craig R. Allen, Maj-Liz Persson
Cooperative Fish and Wildlife Research Units Program—2017 year in review Cooperative Fish and Wildlife Research Units Program—2017 year in review
The Cooperative Fish and Wildlife Research Units Program was involved in a number of notable events during 2017, many concerning our personnel. Dr. Barry Grand left his position as Leader of the Alabama Cooperative Fish and Wildlife Research Unit to become the Cooperative Units Program Supervisor for the South, replacing Dr. Kevin Whalen who took over as Supervisor for the West. We...
Authors
John F. Organ, John D. Thompson, Donald E. Dennerline, Dawn E. Childs
Cooperative Fish and Wildlife Research Units Program—2017 year in review postcard Cooperative Fish and Wildlife Research Units Program—2017 year in review postcard
This postcard provides details about the Cooperative Fish and Wildlife Research Units Program—2017 Year in Review, U.S. Geological Survey Circular 1438, now available at https://doi.org/10.3133/cir1438. In this report, you will find details about the Cooperative Fish and Wildlife Research Units (CRU) Program relating to its background, fish and wildlife science, students, staffing...
Authors
John F. Organ, John D. Thompson, Donald E. Dennerline, Dawn E. Childs
Predicting effects of large-scale reforestation on native and exotic birds Predicting effects of large-scale reforestation on native and exotic birds
Aim Ecological restoration is critical for recovering biodiversity and ecosystem services, yet designing interventions to achieve particular outcomes remains fraught with challenges. In the extensive regions where non-native species are firmly established, it is unlikely that historical conditions can be fully reinstated. To what degree, and how rapidly, can human-dominated areas be...
Authors
Liba Pejchar, Travis Gallo, Mevin Hooten, Gretchen C. Daily
Wild-harvested venison yields and sharing by Michigan deer hunters Wild-harvested venison yields and sharing by Michigan deer hunters
An increased societal focus on wildlife as food and recent policy deliberations regarding legal markets for wild-harvested meat are encouraging wildlife managers and researchers to examine the amount, use, and distribution of meat yielded through recreational hunting. We used responses to questions on the Michigan Deer Harvest Study to estimate the maximum yield of edible venison and...
Authors
Amber D. Goguen, Shawn J. Riley, John F. Organ, Brent A. Rudolph
Can data from disparate long-term fish monitoring programs be used to increase our understanding of regional and continental trends in large river assemblages? Can data from disparate long-term fish monitoring programs be used to increase our understanding of regional and continental trends in large river assemblages?
Understanding trends in the diverse resources provided by large rivers will help balance tradeoffs among stakeholders and inform strategies to mitigate the effects of landscape scale stressors such as climate change and invasive species. Absent a cohesive coordinated effort to assess trends in important large river resources, a logical starting point is to assess our ability to draw...
Authors
Timothy D. Counihan, Ian R. Waite, Andrew F. Casper, David L. Ward, Jennifer S. Sauer, Elise R. Irwin, Colin G. Chapman, Brian Ickes, Craig P. Paukert, John J. Kosovich, Jennifer M. Bayer
By
Ecosystems Mission Area, Water Resources Mission Area, Science Synthesis, Analysis, and Research Program, Cooperative Research Units, Science Analytics and Synthesis (SAS), Species Management Research Program, Oregon Water Science Center, Southwest Biological Science Center, Upper Midwest Water Science Center, Western Fisheries Research Center, Columbia River Research Laboratory (CRRL)
Estimating abundance of an open population with an N-mixture model using auxiliary data on animal movements Estimating abundance of an open population with an N-mixture model using auxiliary data on animal movements
Accurate assessment of abundance forms a central challenge in population ecology and wildlife management. Many statistical techniques have been developed to estimate population sizes because populations change over time and space and to correct for the bias resulting from animals that are present in a study area but not observed. The mobility of individuals makes it difficult to design...
Authors
Alison C. Ketz, Therese L. Johnson, Ryan J. Monello, John A. Mack, Janet L. George, Mevin Hooten, Benjamin R. Kraft, Margaret A. Wild, N. Thompson Hobbs
Geomorphic identification of physical habitat features in a large, altered river system Geomorphic identification of physical habitat features in a large, altered river system
Altered flow regimes in streams can significantly affect ecosystems and disturb ecological processes, leading to species loss and extinction. Many river management projects use stream classification and habitat assessment approaches to design practical solutions to reverse or mitigate adverse effects of flow regime alteration on stream systems. The objective of this study was to develop...
Authors
L. Guertault, G. Fox, Shannon K. Brewer