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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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Anura Anura
This section features the Anura, which includes the families Ascaphidae, Bufonidae, Dendrobatidae, Hylidae, Leptodactylidae, Microhylidae, Pelobatidae, Pipidae, Ranidae, and Rhinophrynidae. It provides information on their historical versus current distribution, historical versus current abundance, life history features, and conservation.
Authors
Michael Lannoo, Alisa L. Gallant, Priya Nanjappa, L. Blackburn, R. Hendricks
Epilogue: Factors implicated in amphibian population declines in the United States Epilogue: Factors implicated in amphibian population declines in the United States
Many species of amphibians have declined substantially in distribution or number of populations in the United States and globally, and a variety of anthropogenic and natural factors have been suggested as causal agents in these declines. Evidence for the causal action of these agents derives from many types of sources, all of which are important in seeking to understand amphibian...
Authors
Michael Lannoo, Alisa L. Gallant, Priya Nanjappa, L. Blackburn, R. Hendricks
Northern Cordillera Northern Cordillera
No abstract available.
Authors
J.W.H. Monger, Raymond A. Price, Warren J. Nokleberg
Contrasting Proterozoic basement complexes near the truncated margin of Laurentia, northwestern Sonora–Arizona international border region Contrasting Proterozoic basement complexes near the truncated margin of Laurentia, northwestern Sonora–Arizona international border region
We utilize new geological mapping, conventional isotope dilution–thermal ionization mass spectrometry (ID-TIMS) and sensitive high-resolution ion microprobe (SHRIMP) U-Pb zircon analyses, and whole-rock radiogenic isotope characteristics to distinguish two contrasting Proterozoic basement complexes in the international border region southeast of Yuma, Arizona. Strategically located near...
Authors
Jonathan A. Nourse, Wayne R. Premo, Alexander Iriondo, Eric R. Stahl
Population manipulations: Chapter Population manipulations: Chapter
No abstract available.
Authors
C. Kenneth Dodd
Red Hills salamander, Phaeognathus hubrichti Highton: Chapter Red Hills salamander, Phaeognathus hubrichti Highton: Chapter
No abstract available.
Authors
C. Kenneth Dodd
Symbiotic lifestyle expression by fungal endophytes and the adaptation of plants to stress: unraveling the complexities of intimacy Symbiotic lifestyle expression by fungal endophytes and the adaptation of plants to stress: unraveling the complexities of intimacy
The fossil record indicates that fungal symbionts have been associated with plants since the Ordovician period (approximately 400 million years ago), when plants first became established on land (Pirozynski and Malloch, 1975; Redecker et al., 2000; Remy et al., 1994; Simon et al., 1993). Transitioning from aquatic to terrestrial habitats likely presented plants with new stresses...
Authors
Regina S. Redman, Joan M. Henson, Russell J. Rodriguez
Ground water to surface water: Chemistry of thermal outflows in Yellowstone National Park Ground water to surface water: Chemistry of thermal outflows in Yellowstone National Park
Geothermal waters in the earth’s subsurface boil with steam separation and may mix with dilute ground waters (that may or may not contain sulfuric acid from sulfur oxidation), resulting in a wide range of compositions when they discharge and emerge at the surface. As they discharge onto the ground surface they undergo evaporative cooling, degassing, oxidation, and mineral precipitation...
Authors
D. Kirk Nordstrom, James W. Ball, R. Blaine McCleskey
Global-scale environmental changes in mountain protected areas: The CLIMET project Global-scale environmental changes in mountain protected areas: The CLIMET project
No abstract available.
Authors
Daniel B. Fagre, D. L. Peterson
Liquefaction induced by historic and prehistoric earthquakes in western Puerto Rico Liquefaction induced by historic and prehistoric earthquakes in western Puerto Rico
Dozens of liquefaction features in western Puerto Rico probably formed during at least three large earthquakes since A.D. 1300. Many of the features formed during the 1918 moment magnitude (M) 7.3 event and the 1670 event, which may have been as large as M 7 and centered in the Añasco River Valley. Liquefaction features along Río Culebrinas, and possibly a few along Río Grande de...
Authors
Martitia P. Tuttle, Kathleen Dyer-Williams, Eugene S. Schweig, Carol S. Prentice, Juan Carlos Moya, Kathleen Tucker
Bufo boreas Baird and Girard, 1852(b): western toad Bufo boreas Baird and Girard, 1852(b): western toad
No abstract available.
Authors
Erin Muths, Priya Nanjappa