Biomarker Benchmarks: Reproductive and Endocrine Biomarkers in Largemouth Bass and Common Carp from United States Waters [ More info] Describes a national reconnaissance study of reproductive health in two species of fish across the US. More than 2,200 common carp and 650 largemouth bass were collected at 119 rivers and streams.
Birds of a feather [ More info] Explains how critical information about dispersal and gene flow in sage-grouse populations can be obtained from the DNA coded in the sage-grouse feathers collected at their communal breeding grounds, which are called "leks".
Boiling water at Hot Creek - The dangerous and dynamic thermal springs in California's Long Valley Caldera [ More info] Explains how these hot surface waters form, why their temperature changes often, and provides safety guidance for visiting this area.
California Groundwater Ambient Monitoring and Assessment (GAMA) Program Priority Basin Project--shallow aquifer assessment [ More info] Explains why we are assessing water quality in shallow aquifers, what we are measuring, and how the results will be reported both to well owners and to the public.
California Water-Quality Assessment [ More info] Results of activities in California conducted under the National Water-Quality Assessment Program (NAWQA): maps, publications and data.
California's BAY-DELTA: USGS Science Supports Decision Making [ More info] What causes changes in the hydrology, the ecology and the water quality of the Sacramento-San Joaquin River Delta and the San Francisco Bay estuary? These studies help state and local agencies manage resources well.
California's Central Valley Groundwater Study: A Powerful New Tool to Assess Water Resources in California's Central Valley [ More info] Modeling effort that integrates a wide variety of geographic, hydrologic, agricultural, climatic, and biological information to help local land managers address resource use issues.
California's restless giant: the Long Valley Caldera [ More info] Geological characteristics of this volcanic area, and volcanic activity, especially swarms of small earthquakes, which may precede eruptions and which are monitored by USGS.
Carbon dioxide and helium discharge from Mammoth Mountain, Long Valley caldera, California [ More info] An explanation of toxic carbon dioxide emissions at Mammoth Mountain in Long Valley caldera, and a description of magmatic helium discharge at the Mammoth Mountain fumarole with photos, maps, and links to other studies.
Cascades Volcano Observatory - Mount St. Helens real-time hydrologic monitoring [ More info] Real-time and historic data from gaging stations for water and mudflow detection in the Mount St. Helens, WA vicinity with data tables and plots, interactive location map and station descriptions.
Alphabetical Index of Topics
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