Book Chapters
Science Quality and Integrity
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse more than 5,500 book chapters authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.
Filter Total Items: 6158
Introduction Introduction
No abstract available.
Authors
D. J. Hoffman, Barnett A. Rattner, G.A. Burton, J. Cairns
Kodiak brown bears Kodiak brown bears
Brown bears (Ursus arctos middendorffi) on the Kodiak Archipelago are famous for their large size and seasonal concentrations at salmon streams. Sport hunting of Kodiak bears has been popular since World War II. Their value as captivating subjects to observe or photograph is a more recent development that is increasing rapidly; visitors from around the world come to experience brown...
Authors
Victor G. Barnes, Roger B. Smith, Mark S. Udevitz, J.R. Bellinger
Making sense of soil ecotoxicology Making sense of soil ecotoxicology
The toxicity of pesticides and environmental contaminants to soil organisms has been measured in studies on earthworms,1 soil arthropods,3-6 soil microorganisms,7 and other soil organisms.8 Toxicity data on earthworms produced in the pesticide registration procedure required by the OECD (Organization for economic cooperation and Development) will provide data on many additional...
Authors
W. Nelson Beyer, Greg L. Linder
Managing and monitoring birds using point counts: Standards and applications Managing and monitoring birds using point counts: Standards and applications
No abstract available.
Authors
C.J. Ralph, Sam Droege, J.R. Sauer
Mapping of bird distributions from point count surveys Mapping of bird distributions from point count surveys
Maps generated from bird survey data are used for a variety of scientific purposes, but little is known about their bias and precision. We review methods for preparing maps from point count data and appropriate sampling methods for maps based on point counts. Maps based on point counts can be affected by bias associated with incomplete counts, primarily due to changes in proportion...
Authors
J.R. Sauer, G.W. Pendleton, Sandra Orsillo
Marine turtles in the Southeast Marine turtles in the Southeast
Five species of marine turtles frequent the beaches and offshore waters of the southeastern United States: loggerhead (Caretta caretta), green (Chelonia mydas), Kemp's ridley (Lepidochelys kempii), leatherback (Dermochelys coriacea), and hawksbill (Eretmochelys imbricata). All five are reported to nest, but only the loggerhead and green turtle do so in substantial numbers. Most nesting...
Authors
C. Kenneth Dodd
Migratory bird population changes in North Dakota Migratory bird population changes in North Dakota
The status of migratory bird populations in North America has received increased attention in recent years. Much of this consideration has been on Neotropical migrants, especially those associated with eastern forests. The status of migratory bird populations in the Great Plains has received far less attention. During the past quarter-century, populations of many species of birds that...
Authors
Lawrence D. Igl, Douglas H. Johnson
Mississippi sandhill cranes Mississippi sandhill cranes
Resident sandhill cranes formed a continuous population in Georgia and Florida and widely separated populations along the Gulf Coastal Plain of Texas, Louisiana, Mississippi, and Alabama (Figure). The Mississippi sandhill crane (Grus canadensis pulla) was one of the widely separated populations on the Coastal Plain that bred in pine savannas in southeastern Mississippi, just east of the...
Authors
George F. Gee, Scott G. Hereford
Modeling shoreline dynamics at Sandy Hook, New Jersey, USA Modeling shoreline dynamics at Sandy Hook, New Jersey, USA
No abstract available.
Authors
J.R. Allen, B. Shaw, A.F. Lange
Modeling the dynamics of marine species: the importance of incorporating larval dispersal Modeling the dynamics of marine species: the importance of incorporating larval dispersal
No abstract available at this time
Authors
S.D. Gaines, K. D. Lafferty
Morpholoy and stratal geometry of the Anarctic continental shelf: insights from models Morpholoy and stratal geometry of the Anarctic continental shelf: insights from models
No abstract available.
Authors
Uri S. ten Brink, Christopher Schneider, Aaron H. Johnson
Neotropical migrant landbirds and landscape changes in Los Tuxtlas, Veracruz, Mexico Neotropical migrant landbirds and landscape changes in Los Tuxtlas, Veracruz, Mexico
Faced with the problem of habitat loss and with the need to preserve the remaining components of the original avian biodiversity in neotropical regions such as Los Tuxtlas, it is imperative to determine how the neotropical migrant bird species have responded to the anthropogenic alterations of their natural habitats. To provide data in this direction, we censused neotropical migrant...
Authors
A. Estrada, R. Coates-Estrada, E. Diaz-Islas, C.S. Robbins, B.A. Dowell, D. Meritt