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: 6063
Estuaries: Life on the edge: Chapter 19
No abstract available.
Authors
James E. Cloern, Patrick L. Barnard, Erin Beller, John C. Callaway, Letitia Grenier, Edwin D. Grosholz, Robin Grossinger, Kathryn Hieb, James T. Holligaugh, Noah Knowles, Martha Sutula, Samuel Veloz, Kerstin Wasson, Alison Whipple
Evolution of viral virulence: empirical studies
The concept of virulence as a pathogen trait that can evolve in response to selection has led to a large body of virulence evolution theory developed in the 1980-1990s. Various aspects of this theory predict increased or decreased virulence in response to a complex array of selection pressures including mode of transmission, changes in host, mixed infection, vector-borne transmission, environmenta
Authors
Gael Kurath, Andrew R. Wargo
Exotic annual Bromus invasions: Comparisons among species and ecoregions in the western United States
Exotic annual Bromus species are widely recognized for their potential to invade, dominate, and alter the structure and function of ecosystems. In this chapter, we summarize the invasion potential, ecosystem threats, and management strategies for different Bromus species within each of five ecoregions of the western United States. We characterize invasion potential and threats in terms of ecosyste
Authors
Matthew L. Brooks, Cynthia S. Brown, Jeanne C. Chambers, Carla M. D'Antonio, Jon E. Keeley, Jayne Belnap
Exploration and geology of the Karangahake and Rahu epithermal Au-Ag deposits, Hauraki Goldfield
Karangahake was the third largest gold producer in the Hauraki goldfield. In 2009, New Talisman Gold mines was granted a mining permit, and plans are underway to commence underground mine development of the Maria vein, which has a maiden Ore Reserve (consistent with the 2012 JORC Code) of 28 800 oz Au and 127 800 oz Ag. Exploration drilling at Rahu, located 2 km north of Karangahake has identified
Authors
Mark P. Simpson, Murray R Stevens, Jeffrey L. Mauk, Matthew C Harris, Alistair G J Stuart
Fire as an ecosystem process: Chapter 3
This long-anticipated reference and sourcebook for California’s remarkable ecological abundance provides an integrated assessment of each major ecosystem type—its distribution, structure, function, and management. A comprehensive synthesis of our knowledge about this biologically diverse state, Ecosystems of California covers the state from oceans to mountaintops using multiple lenses: past and pr
Authors
Jon E. Keeley, Hugh D. Safford
Fishes of the Mississippi River
No abstract available.
Authors
Harold Schramm, Jay T. Hatch, Robert A. Hrabik, William T. Slack
Geology of the Mount Rogers area, revisited: Evidence of Neoproterozoic continental rifting, glaciation, and the opening and closing of the Iapetus ocean, Blue Ridge, VA–NC–TN
Recent field and geochronological studies in eight 7.5-minute quadrangles near Mount Rogers in Virginia, North Carolina and Tennessee recognize important stratigraphic and structural relationships for the Neoproterozoic Mount Rogers and Konnarock formations, the northeast end of the Mountain City window, the separation of Mesoproterozoic rocks of the Blue Ridge into three age groups, and timing an
Authors
Arthur J. Merschat, C. Scott Southworth, Christopher S. Holm-Denoma, Ryan J. McAleer
Geometallurgy of ironsand from the Waikato North Head deposit, New Zealand
The Waikato North Head deposit produces a magnetic mineral concentrate from Quaternary sands that formed in a coastal setting in the North Island of New Zealand. Detailed examination of the magnetic mineral fraction of the different stratigraphic horizons mined at Waikato North Head shows that the youngest units yield concentrates with significant concentrations of gangue minerals that are include
Authors
Jeffrey L. Mauk, Helen A Cocker, Harold Rogers, Jamie Ogiliev, Alex B Padya
Golden-winged Warbler nest-site habitat selection: Chapter 7
Avian habitat selection occurs at multiple spatial scales to incorporate life history requirements. Breeding habitat of Golden-winged Warblers (Vermivora chrysoptera) is characterized by largely forested landscapes containing natural or anthropogenic disturbance elements that maintain forest patches in early stages of succession. Breeding habitat occurs in a variety of settings, including shrub an
Authors
Theron M. Terhune, Kyle R. Aldinger, David A. Buehler, David J. Flaspohler, Jeffrey L. Larkin, John P. Loegering, Katie L. Percy, Amber M. Roth, Curtis G. Smalling, Petra Wood
Groundwater regulation and integrated planning
The complex nature of groundwater and the diversity of uses and environmental interactions call for emerging groundwater problems to be addressed through integrated management and planning approaches. Planning requires different levels of integration dealing with: the hydrologic cycle (the physical process) including the temporal dimension; river basins and aquifers (spatial integration); socioeco
Authors
Philippe Quevauviller, Okke Batelaan, Randall J. Hunt
Hydrologic exchange flows and their ecological consequences in river corridors
The actively flowing waters of streams and rivers remain in close contact with surrounding off-channel and subsurface environments. These hydrologic linkages between relatively fast flowing channel waters, with more slowly flowing waters off-channel and in the subsurface, are collectively referred to as hydrologic exchange flows (HEFs). HEFs include surface exchange with a channel’s marginal areas
Authors
Judson Harvey
Impact of carbon dioxide level, water velocity, and feeding regimen on growth and fillet attributes of cultured rainbow trout (Oncorhynchus mykiss)
Production and management variables such as carbon dioxide (CO2) level, water velocity, and feeding frequency influence the growth and fillet attributes of rainbow trout (Oncorhynchus mykiss), as well as cost of production. More information is needed to determine the contributions of these variables to growth and fillet attributes to find the right balance between input costs and fish performance.
Authors
Patricia M. Mazik, P. M. Mazik, P. B. Kenney, J.T Silverstein