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: 6197
Demography of forest birds in Panama: How do transients affect estimates of survival rates? Demography of forest birds in Panama: How do transients affect estimates of survival rates?
Estimates of annual survival rates of neotropical birds have proven controversial. Traditionally, tropical birds were thought to have high survival rates for their size, but analyses of a multispecies assemblage from Panama by Karr et al. (1990) provided a counterexample to that view. One criticism of that study has been that the estimates were biased by transient birds captured only...
Authors
J. D. Brawn, J.R. Karr, J.D. Nichols, W.D. Robinson
Designing an accuracy assessment for a USGS regional land cover mapping program Designing an accuracy assessment for a USGS regional land cover mapping program
No abstract available.
Authors
Z. Zhu, L. Yang, S.V. Stehman, R.L. Czaplewsld
Diversity: Familial and generic characterizations Diversity: Familial and generic characterizations
No abstract available.
Authors
R. Altig, R.W. McDiarmid
Ecology and behaviour of the Alder Flycatcher Empidonax alnorum, Tyrannidae in winter Ecology and behaviour of the Alder Flycatcher Empidonax alnorum, Tyrannidae in winter
The Alder Flycatcher Empidonax alnorum (Tyrannidae) winters from Colombia and Venezuela, south to northern Argentina. We studied the species in Manu National Park, Madre de Dios, Peru. In this area the species occupies riparian zones along lowland meander rivers as well as adjacent transition zone forest in the floodplain. These habitats have a number of age-related longitudinal zones...
Authors
M. Foster
Ecosystem and Landscape Diversity Ecosystem and Landscape Diversity
No abstract available at this time
Authors
J. Gosz, J. Asher, B. Holder, R. Knight, R. Naiman, G. Raines, P.A. Stine, B. Wigley
Ecosystem processes and functioning Ecosystem processes and functioning
No abstract available.
Authors
A.E. Lugo, Jill Baron, T. P. Frost, T. W. Cundy, P. Dittberner
Effects of contaminants on Double-crested Cormorant reproduction in Green Bay, Wisconsin, USA Effects of contaminants on Double-crested Cormorant reproduction in Green Bay, Wisconsin, USA
In 1994 and 1995, Double-crested Cormorants Phalacrocorax auritus were monitored from egg-laying through 12 days of age at Cat Island, Green Bay, Wisconsin, USA. Sample eggs at hatching were analysed for organochlorines (including total PCBs, PCB congeners, and DDE), hepatic microsomal ethoxyresorufin-O-dealkylase (EROD) activity in livers of embryos, and eggshell thickness. The number...
Authors
T. W. Custer, Christine M. Custer, K. L. Stromborg, M. J. Melancon
Effects of hunting on survival and habitat use by American Woodcock on breeding and migration areas Effects of hunting on survival and habitat use by American Woodcock on breeding and migration areas
No abstract available.
Authors
D.G. McAuley, J. R. Longcore, R.B. Allen, G.F. Sepik, Simon Williams, W. Palmer, J. Dunn, K. Evans
Emperor goose Anser canagicus Emperor goose Anser canagicus
No abstract available.
Authors
Joel A. Schmutz
Environmental monitoring Environmental monitoring
No abstract available at this time
Authors
E.R. Smith, C.R. Parker, J.D. Peine