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.
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: 6164
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
Development of management objectives for breeding birds in the Mississippi Alluvial Valley Development of management objectives for breeding birds in the Mississippi Alluvial Valley
We used a six-step process to set habitat objectives and population goals for breeding birds in the Mississippi Alluvial Valley. Specifically, we used existing empirical studies and mathematically derived viable population estimates to define habitat objectives and population goals for bottomland hardwood forest, the most important habitat type in this physiographic area. Although...
Authors
A.J. Mueller, D.J. Twedt, C.R. Loesch
Development of management objectives for waterfowl and shorebirds within the Mississippi Alluvial Valley Development of management objectives for waterfowl and shorebirds within the Mississippi Alluvial Valley
The goal of the Lower Mississippi Valley Joint Venture of the North American Waterfowl Management Plan is to provide sufficient habitat to support 4.3 million wintering ducks and 1.0 million wintering geese annually. Under the assumption that the amount of foraging habitat is the primary limitation to supporting waterfowl population goals in the Mississippi Alluvial Valley (MAV), a...
Authors
C.R. Loesch, D.J. Twedt, K. Tripp, W.C. Hunter, M.S. Woodrey
Developments in fish passage engineering and biology Developments in fish passage engineering and biology
No abstract available at this time
Authors
M. Odeh, A. Haro
Diversity and distribution of amphibians and reptiles Diversity and distribution of amphibians and reptiles
No abstract available.
Authors
R.W. McDiarmid, J.C. Mitchell
Diversity, levels of imperilment, and cryptic fishes in the southeastern United States Diversity, levels of imperilment, and cryptic fishes in the southeastern United States
No abstract available.
Authors
Noel M. Burkhead, Howard L. Jelks
Early avian research at the Savannah River Site, South Carolina: historical highlights and possibilities for the future Early avian research at the Savannah River Site, South Carolina: historical highlights and possibilities for the future
Avian biology and collection of baseline population data was a major part of the first decade (1951-1961) of field research at the Savannah River Site (SRS). Baseline inventories involving organisms and land-use types were part of the mission in the early contracts between the Atomic Energy Commission (now the Department of Energy) and the University of Georgia prior to the establishment...
Authors
J.M. Meyers, E.P. Odum
Ecotoxicology of organic contaminants to amphibians Ecotoxicology of organic contaminants to amphibians
The effects of organic contaminants on amphibians are poorly known but of considerable interest. These contaminants include the highly toxic dioxins and furans as well as PCBs, PAHs and organochlorine pesticides. Although these compounds may have lower acute toxicity than dioxins and furans, they have been implicated in several problems associated with genotoxicity, endocrine disruption
Authors
D. W. Sparling
Effects of Altosid and Abate-4E on deformities and survival in southern leopard frogs under semi-natural conditions Effects of Altosid and Abate-4E on deformities and survival in southern leopard frogs under semi-natural conditions
Experimental wetlands were sprayed with Abate-4E (a.i. temephos) and Altosid (a.i. methoprene) through the summer following label directions. In late August and early Septemeber metamorphing tadpoles were captured and examined for deformities. Tadpoles captured from ponds sprayed with Altosid had a 15% deformity rate mostly involving total or partially missing hind limbs. Tadpoles from...
Authors
D. W. Sparling
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
Effects of two long-term mowing regimes on vegetation Effects of two long-term mowing regimes on vegetation
Wildlife managers have for many years been interested in the role of mowing as a management technique to benefit wildlife. Two long-term mowing regimes (60 years of similar management) were evaluated at Patuxent Research Refuge during the summer of 1997 to better understand the influence of mowing on vegetation communities. Mowing ceased in 1997 due to reduction in maintenance funds...
Authors
Matthew C. Perry, A.S. Deller