Book Chapters
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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
Ecology of hydrilla in the Potomac 1985-1987 Ecology of hydrilla in the Potomac 1985-1987
No abstract available.
Authors
R.S. Hammerschlag
Environmental contaminants and the management of bat populations in the United States Environmental contaminants and the management of bat populations in the United States
Food-chain residues of organochlorine pesticides probably have been involved in declines of some U.S. bat populations; examples include free-tailed bats at Carlsbad Cavern, New Mexico, and the endangered gray bat at sites in Missouri and Alabama. If a long-lived contaminant has not been dispersed in large amounts over large areas, its impact may be controlled by administrative action...
Authors
D. R. Clark
Feeding ecology of canvasbacks staging on Pool 7 of the Upper Mississippi River Feeding ecology of canvasbacks staging on Pool 7 of the Upper Mississippi River
Foods consumed by canvasback ducks (Aythya valisineria), food availability, and energetic relationships were studied on Navigation Pool 7 of the upper Mississippi River in 1978, 1979, and 1980. Canvasbacks fed primarily upon winter buds of American wildcelery (Vallisneria americana) and tubers of stiff arrowhead (Sagittaria rigida). In 1980, waterfowl consumed 40% of 380,160 kg of...
Authors
C. E. Korschgen, L. S. George, W. L. Green
Ferruginous hawk Ferruginous hawk
In the Southwest, the ferruginous hawk is a local and isolated breeder and an uncommon but consistent winter visitor. Apparently, the breeding range of this species in the Southwest was historically much greater than today. The ferruginous hawk is being considered for listing by the U.S. Fish and Wildlife Service but remains unclassified by the individual states comprising the Southwest...
Authors
R.S. Hall, R.L. Glinski, D. H. Ellis, J.M. Ramakka, D.L. Base
Fish culture in the United States Fish culture in the United States
No abstract available at this time
Authors
N. C. Parker
Forest fragmentation and its effects on birds Forest fragmentation and its effects on birds
Fragmentation of forest land, whether by suburban development, highways, transmission lines, or poorly planned cutting regimes, seriously affects reproduction by the large numbers of obligate forest interior birds. Many of our warblers, vireos, thrushes, tanagers, and flycatchers are highly migratory insectivorous birds that spend more than half the year in the neotropics, but migrate...
Authors
C.S. Robbins
Geomorphic measurements after a flood Geomorphic measurements after a flood
No abstract available.
Geophysical study of a magma chamber near Mussau Island, Papua New Guinea Geophysical study of a magma chamber near Mussau Island, Papua New Guinea
Analysis of a 24-channel seismic-reflection data collected near Mussau Island, Papua New Guinea, shows a high-amplitude, negative-polarity reflection that we believe is from the top of a magma chamber. The reflecting horizon lies at a depth of about 4.4 s subbottom and can be traced laterally for 2.6 km. On shot gathers, the reflection demonstrates normal moveout appropriate for an in...
Authors
Shawn V. Dadisman, M. S. Marlow
Graptemys barbouri Graptemys barbouri
No abstract available at this time
Authors
R.A. Sanderson, J.E. Lovich
Habitat correlates of distribution of the California red-legged frog (Rana aurora draytonii) and the foothill yellow-legged frog (Rana boylii): implications for management Habitat correlates of distribution of the California red-legged frog (Rana aurora draytonii) and the foothill yellow-legged frog (Rana boylii): implications for management
No abstract available at this time
Authors
M.P. Hayes, M.R. Jennings