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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.

Year in Review

Our Story

Blooming wildflowers in Pinnacles National Park.

The circular highlights how our research efforts fulfill larger USGS strategic goals.

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Our History

Tricolored Heron at Ding Darling National Park

This book is dedicated to those who are or have been associated with the unit program. 

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Our Research

Yellow-billed Loon on a lake in the northern area of Alaska.

This report provides abstracts of most of the ongoing and recently completed research.

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Filter Total Items: 4178

Production and disposal of waste materials from gas and oil extraction from the Marcellus Shale Play in Pennsylvania

The increasing world demand for energy has led to an increase in the exploration and extraction of natural gas, condensate, and oil from unconventional organic-rich shale plays. However, little is known about the quantity, transport, and disposal method of wastes produced during the extraction process. We examined the quantity of waste produced by gas extraction activities from the Marcellus Shale

Authors
Kelly O. Maloney, David A. Yoxtheimer
By
Ecosystems Mission Area, Cooperative Research Units

Roost networks of northern myotis (Myotis septentrionalis) in a managed landscape

Maternity groups of many bat species conform to fission–fusion models and movements among diurnal roost trees and individual bats belonging to these groups use networks of roost trees. Forest disturbances may alter roost networks and characteristics of roost trees. Therefore, at the Fernow Experimental Forest in West Virginia, we examined roost tree networks of northern myotis (Myotis septentriona
Authors
J.B. Johnson, W. Mark Ford, J.W. Edwards
By
Cooperative Research Units

Do environmental changes or juvenile competition act as mechanisms of species displacement in crayfishes?

The Big Creek Crayfish, Orconectes peruncus, is native to the St. Francis River drainage in Missouri, USA and is often absent where the introduced Woodland Crayfish, Orconectes hylas, has established. We performed a field experiment to determine whether effects of current abiotic conditions and interspecific competition with O. hylas were responsible for displacement of O. peruncus from parts of t
Authors
Jacob T. Westhoff, R.J. DiStefano, Daniel D. Magoulick
By
Cooperative Research Units

The leatherbacks of Grande Riviere Trinidad and Tobago

No abstract available.
Authors
Raymond R. Carthy
By
Cooperative Research Units

Morphometric-based sexual determination of Bananaquits (Coereba flaveola)

The Bananaquit (Coereba flaveola) is a common passerine throughout the tropics and has been a convenient species for ecological studies. This species has sexually monomorphic plumage and cannot be reliably sexed unless in breeding condition. This is problematic for demographic and comparative studies, which are contingent upon accurately aging and sexing individuals. Although male Bananaquits are
Authors
Brent D. Bibles, Clint W. Boal
By
Cooperative Research Units

Use of occupancy models to evaluate expert knowledge-based species-habitat relationships

Expert knowledge-based species-habitat relationships are used extensively to guide conservation planning, particularly when data are scarce. Purported relationships describe the initial state of knowledge, but are rarely tested. We assessed support in the data for suitability rankings of vegetation types based on expert knowledge for three terrestrial avian species in the South Atlantic Coastal Pl
Authors
Monica N. Iglecia, Jaime A. Collazo, Alexa McKerrow
By
Core Science Systems Mission Area, Science Synthesis, Analysis and Research Program, Cooperative Research Units, Gap Analysis Project, Science Analytics and Synthesis (SAS) Program

Science summary in support of Manatee Protection Area (MPA) design in Puerto Rico

The Antillean manatee (Trichechus manatus manatus), a subspecies of the West Indian manatee, is listed as endangered by the US Department of Interior. In accordance with its listing, the U.S. Fish and Wildlife Service’s Caribbean Field Office (USFWS) is mandated to create one or more Manatee Protection Areas (MPAs) for Puerto Rico. Designation of these areas must comply with the legal definition o
Authors
C. Ashton Drew, Louise B. Alexander-Vaughn, Jaime A. Collazo
By
Cooperative Research Units

Communicating science: from cuneiform to the contemporary and beyond

No abstract available.
Authors
Cecil A. Jennings
By
Cooperative Research Units

Nutrient and algal responses to winterkilled fish-derived nutrient subsidies in eutrophic lakes

Fishes inhabiting shallow, glacial lakes of the Prairie Pothole Region in the United States and Canada periodically experience hypoxia in severe winters that can lead to extensive fish mortality resulting in high biomasses of dead fish. However, the role of carcass-derived nutrient subsidies in shallow, eutrophic lakes translocated to pelagic primary producers is not well documented. This study qu
Authors
Casey W. Schoenebeck, Michael L. Brown, Steven R. Chipps, David R. German
By
Cooperative Research Units

An application and extension of the constraints–effects–mitigation model to Minnesota waterfowl hunting

This study extends modeling work on the leisure constraint negotiation process from physically active leisure and celebrity fandom to hunting. We test a model derived from the constraints–effects–mitigation model of leisure participation. The model is examined in the context of continued Minnesota waterfowl hunting among a sample of Minnesota residents who purchased a North Dakota waterfowl stamp.
Authors
Susan A. Schroeder, David C. Fulton, Jeffrey S. Lawrence, Steven D. Cordts
By
Cooperative Research Units

Adding the ocean to the study of seabirds: A brief history of at-sea seabird research

We review the history of how research directed towards marine ornithology has led to an appreciation of seabirds as highly specialized marine organisms. Beginning with R. C. Murphy (Pacific), V. C. Wynne-Edwards (Atlantic), and associates in the early 1900s, the research approach grew from an emphasis on seabird single-species ecology to an appreciation of interacting species assemblages and final
Authors
David G. Ainley, Christine A. Ribic, Eric J. Woehler
By
Cooperative Research Units

Habitat and prey availability attributes associated with juvenile and early adult pallid sturgeon occurrence in the Missouri River, USA

The pallid sturgeon Scaphirhynchus albus is a federally endangered species native to the Missouri and lower Mississippi Rivers, USA. As part of recovery efforts, over 360000 pallid sturgeon have been stocked into the Missouri River since 1994, and a standardized, long-term monitoring program was initiated in 2003. Understanding the distribution and habitat requirements of juvenile and early adult
Authors
Bryan D. Spindler, Steven R. Chipps, Robert A. Klumb, Brian D. S. Graeb, Michael C. Wimberly
By
Cooperative Research Units