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: 6198
Combining information from monitoring programs: Complications associated with indices and geographic scale Combining information from monitoring programs: Complications associated with indices and geographic scale
To adequately monitor Neotropical migratory birds, information must be collected to assess population change at local, regional, and continent-wide scales. I suggest that large-scale survey results (such as those derived from the North American Breeding Bird Survey) should not be used to predict population attributes on parks, refuges, and other protected areas. These areas are often...
Authors
J.R. Sauer
Conservation of freshwater turtles Conservation of freshwater turtles
No abstract available.
Authors
V.J. Burke, J.E. Lovich, J.W. Gibbons
Conservation of herons Conservation of herons
Abstract not submitted to date
Authors
H. Hafner, R.V. Lansdown, J.A. Kushlan, Robert W. Butler, T. W. Custer, I.J. Davidson, R.M. Erwin, J.A. Hancock, A.M. Lyles, M. Maddock, L. Marion, G. Morales, T. Mundkur, C. Perennou, O. Pineau, D. Turner, P. Ulenaers, J. VanVessem, L. Young
Conservation of herons Conservation of herons
No abstract available.
Authors
H. Hafner, R.V. Lansdown, J.A. Kushlan, Robert W. Butler, T. W. Custer, I.J. Davidson, R.M. Erwin, J.A. Hancock, A.M. Lyles, M. Maddock, L. Marion, G. Morales, T. Mundkur, C. Perennou, O. Pineau, D. Turner, P. Ulenaers, J. van Vessem, L. Young
Conservation planning and monitoring avian habitat Conservation planning and monitoring avian habitat
Migratory bird conservation plans should not only develop population goals, they also should establish attainable objectives for optimizing avian habitats. Meeting population goals is of paramount importance, but progress toward established habitat objectives can generally be monitored more easily than can progress toward population goals. Additionally, local or regional habitat...
Authors
D.J. Twedt, C.R. Loesch
Contaminant effect endpoints in terrestrial vertebrates at and above the individual level Contaminant effect endpoints in terrestrial vertebrates at and above the individual level
Use of biochemical, physiological, anatomical, reproductive and behavioral characteristics of wild terrestrial vertebrates to assess contaminant exposure and effects has become commonplace over the past 3 decades. At the level of the individual organism, response patterns have been associated with and sometimes causally linked to contaminant exposure. However, such responses at the...
Authors
Barnett A. Rattner, J.B. Cohen, N. H. Golden
Cowbird parasitism in grassland and cropland in the northern Great Plains Cowbird parasitism in grassland and cropland in the northern Great Plains
The landscape of the Great Plains has been greatly altered by human activities in the past century, and several grassland passerines have experienced significant population declines in recent decades. We explore here whether brood parasitism by Brown-headed Cowbirds, which are abundant in the Great Plains, has contributed to these declines. We measured the frequency of cowbird parasitism...
Authors
Rolf R. Koford, B. S. Bowen, John T. Lokemoen, Arnold D. Kruse
Creating and managing wetland impoundments to provide habitat for aquatic birds Creating and managing wetland impoundments to provide habitat for aquatic birds
Patuxent Research Refuge, located in Central Maryland (USA), has approximately 140 ha of impoundments that were constructed for recreational and wildlife conservation purposes. Impoundments are of three major designs: dammed ravines, excavated basins, and diked ponds. Over 50 species of wetland plants were transplanted to impoundments of Patuxent from many parts of the United States...
Authors
Matthew C. Perry, P. Kangas, H.H. Obrecht
DC birdscape: a program for monitoring neotropical migrant birds in Washington, DC DC birdscape: a program for monitoring neotropical migrant birds in Washington, DC
Urban and suburban habitats often contain a variety of Neotropical migratory birds, but are poorly sampled by programs such as the North American Breeding Bird Survey. DC Birdscape was developed to inventory and monitor birds in Washington, D.C. Birds were surveyed using a systematic sample of point counts during 1993-1995. Results indicate that species richness of Neotropical migratory...
Authors
J.R. Sauer, J. Hadidian, C. Swarth, Sam Droege, P. Handly, G. Diddan, J. Huff
Determining timescales for groundwater flow and solute transport Determining timescales for groundwater flow and solute transport
One of the principal uses of environmental tracers is for determining the ages of soil waters and groundwaters. (We may refer to this as ‘hydrochronology’by analogy with the dating of solid materials known as geochronology.) Information on soil water and groundwater age enables timescales for a range of subsurface processes to be determined. For example, ‘groundwater stratigraphy’is used
Authors
Peter G. Cook, J.K. Bohlke
Development of databases for germplasm repositories Development of databases for germplasm repositories
No abstract available at this time
Authors
H. L. Kincaid