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.
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Structural and functional effects of herbicides on non-target organisms in aquatic ecosystems with an emphasis on atrazine
Herbicide use has increased dramatically around the world over the past 6 decades (Gianessi and Reigner, 2007). Few herbicides were in use in the 1950s. However, by 2001 approximately 1.14 billion kilograms of herbicides were applied globally for the control of undesireable vegetation in agricultural, silvicultural, lawncare, aquacultural, and irrigation/recreational water management activities (K
Authors
James Fairchild
Chapter 10: Occurrence of non-native invasive plants: The role of anthropogenic features
The invasion of non-native plants in the Wyoming Basins Ecoregional Assessment (WBEA) area is a major economic and ecological stress, with invasions thought to be hastened by energy developments. Given the potential impacts of nonnative invasive plants and the rapid changes in land use in the WBEA, broad-scale assessments and predictive models of nonnative invasive plant distribution are needed. U
Authors
Scott E. Nielsen, Cameron L. Aldridge, Steven E. Hanser, Matthias Leu, Steven T. Knick
Chapter 9: Occurrence of small mammals: Deer mice and challenge of trapping across large spatial extents
Small mammal communities living in sagebrush (Artemisia spp.) may be sensitive to habitat isolation and invasion by exotic grass species. Yet there have been no spatially explicit models to improve our understanding of landscape-scale factors determining small mammal occurrence or abundance. We live-trapped small mammals at 186 locations in the Wyoming Basin Ecoregional Assessment area to develop
Authors
Steven E. Hanser, Matthias Leu, Cameron L. Aldridge, Scott E. Nielsen, Steven T. Knick
Chapter 11: Management considerations
We conducted an ecoregional assessment of sagebrush (Artemisia spp.) ecosystems in the Wyoming Basins and surrounding regions (WBEA) to determine broad-scale species-environmental relationships. Our goal was to assess the potential influence from threats to the sagebrush ecosystem on associated wildlife through the use of spatially explicit occurrence and abundance models. These models were develo
Authors
Steven T. Knick, Steven E. Hanser, Matthias Leu, Cameron L. Aldridge, Scott E. Nielsen, Mary M. Rowland, Sean P. Finn, Michael J. Wisdom
Integrating field observations and inverse and forward modeling: application at a site with acidic, heavy-metal-contaminated groundwater
No abstract available.
Authors
Pierre D. Glynn, James G. Brown
Effects of climate change on nutrition and genetics of White-tailed Ptarmigan
White-tailed Ptarmigan (Lagopus leucura) are well suited as a focal species for the study of climate change because they are adapted to cool, alpine environments that are expected to undergo unusually rapid climate change. We compared samples collected in the late 1930s, the late 1960s, and the late 2000s using molecular genetic and stable isotope methods in an effort to determine whether White-t
Authors
Sara J. Oyler-McCance, Craig A. Stricker, Judy St. John, Clait E. Braun, Gregory T. Wann, Cameron L. Aldridge
Burmese Pythons and other giant constrictors
No abstract available.
Authors
Robert N. Reed, Gordon H. Rodda
Analytical characterization of selective benthic flux components in estuarine and coastal waters
Benthic flux is the rate of flow across the bed of a water body, per unit area of bed. It is forced by component mechanisms, which interact. For example, pressure gradients across the bed, forced by tide, surface gravity waves, density gradients, bed–current interaction, turbulence, and terrestrial hydraulic gradients, drive an advective benthic flux of water and constituents between estuarine and
Authors
Jeffrey N. King
Stream-groundwater interactions
Streams and their surrounding catchments exchange water and solutes on a range of physical scales. Exchange with the stream may extend into the interstitial areas of the streambed, the hyporheic zone, the riparian area, or the catchment's groundwater flow system. Even at the smaller scales, the exchanges significantly influence solute transport, nutrient cycling, and the aquatic ecosystem. Over th
Authors
Kenneth E. Bencala
Environmental influences on the occurrences of sepiolite and palygorskite: a brief review
Sepiolite is a hydrous magnesium silicate formed by precipitation of near-surface brackish or saline waters, under semi-arid climatic conditions. Four major influences on the distribution of sepiolite are source materials, climate, physical parameters and associated phase relations. Two major pathways governing the occurrence of sepiolite and palygorskite are direct precipitation from solution, an
Authors
Blair F. Jones, Kathryn M. Conko