Main page for accessing links for information and data on the San Francisco Bay estuary and its watershed with links to highlights, water, biology, wetlands, hazards, digital maps, geologic mapping, winds, bathymetry and overview of the Bay.
Updated summaries of research in the Arctic National Wildlife Refuge, Alaska, on caribou, muskoxen, predators (grizzly bears, wolves, golden eagles), polar bears, snow geese and their wildlife habitats with maps of land-cover and vegetation.
Project of the Gulf of Mexico Integrated Science program that evaluates the transport and sedimentation of contaminates through the Mississippi River and Atchafalaya River delta to the near-shore Gulf of Mexico. Includes aerial photographs.
Small wetlands in this large area have hosted migratory birds for a long time, but with changes in agricultural practice and regional climate those habitats may not remain hospitable to the wild populations.
Explains biological soil crusts, organism-produced soil formations commonly found in semiarid and arid environments, with special reference to their biological composition, physical characteristics, and ecological significance.
Fact sheet on the need to protect biological soil crusts in the desert. These crusts are most of the soil surface in deserts not covered by green plants and are inhabited by cyanobacterium (blue-green algae) and other organisms useful to the ecosystem.
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".
This web site is an outgrowth of an agreement between the USGS and the New England Aquarium, designed to summarize and make available results of scientific research. It will also present educational material of interest to wide audiences.
Description of bryophytes (mosses, liverworts, and hornworts) and lichens (dual organisms of a fungus and an alga or a cyanobacterium) that are part of forest ecosystems in the Pacific Northwest with information on habitat and conservation.
Buffelgrass (Pennisetum ciliare) poses a problem in the deserts of the United States, growing in dense stands and introducing a wildfire risk in an ecosystem not adapted to fire. This report explains what we are doing to help mitigate its effects.
Combining genetic data with current and predicted climate scenarios, we are modeling the predicted future distributions of wildlife populations in the Arctic and identifying key environmental variables that determine important animal habitat.
Three themes of ongoing research: forecasting polar bear and walrus population response to changing marine ecosystems; measuring wildlife population changes in the Arctic coastal plain, and wildlife communities in the boreal-Arctic transition zone.
Changes in Arctic sea ice and permafrost will likely affect populations of wildlife. Migratory birds such as loons rely on freshwater lakes in the Arctic for nesting and food supply; we are studying how their populations are affected by these changes.
Loss of sea ice has increased ocean wave action, changing coastal habitats. For some geese this has been a positive change, increasing the amount of coastal area that supports vegetation the geese feed on.
Overview of interdisciplinary research studies in Glacier National Park to understand how this mountain wilderness responds to present climatic variability and other external stressors, such as air pollution, and links to detailed reports.
Home page for Coastal and Marine Geology with links to topics of interest (sea level change, erosion, corals, pollution, sonar mapping, and others), Sound Waves monthly newsletter, field centers, regions of interest, and subject search system.
Declines in fish and wildlife populations, water-quality issues, and changes in coastal habitats have prompted this USGS study of the region's nearshore life and environment. Includes links to data from published reports.
The information provided in the CEE-TV database profiles available geo-referenced information on contaminant exposure and effects in terrestrial vertebrates along the U. S. coasts. The database utilizes Microsoft's Access 2000 for Windows.
Assessment of the importance of the Conservation Reserve Program in preventing the decline of grassland breeding birds by preserving grassland habitats in North Dakota. Published as Wilson Bulletin v. 107 no. 4, pp. 709-718 (1995).
Three mathematical models using information about the geographic distribution and character of land surface characteristics along with proposed modifications or plausible events to determine the likely costs and benefits of actions and events.
Use of diatoms in biostratigraphy, coastal and estuarine studies, paleoceanology, paleoliminology, earthquake studies, environmental quality and forensic studies. Includes listing of USGS diatom projects and links to other diatom websites.
Satellite images of geographic areas of interest, cities, deserts, glaciers, geologic features, disaster areas, water bodies, and wildlife linked with articles, maps, and other images such as AVHRR, photographs, and special project images.
Comparison of water in two adjacent watersheds before and after implementing a brush management strategy in one of the watersheds helps us see what water resource characteristics are sensitive to brush management and how.
Study of the effects of the practice of cycling municipal nutrient-enriched wastewater from holding ponds through forested wetlands. Studies were in the Cypiere Perdue Swamp, Louisiana, and the Drummond Bog, Wisconsin.
Study of wildland fire history and fire ecology such as plants in the Sierra Nevada forests, California shrublands, the Mojave, and Sonoran deserts to develop management techniques that will reduce hazards.
Home page of the Forest and Rangeland Ecosystem Science Center, Corvallis, providing research and technical support for ecosystem management in the western U.S. Links to projects, field stations, fact sheets, partnerships, and publications.
Catalog of bird species common to forest and rangeland habitats in the U.S. with natural histories including taxonomic information, range, and habitat descriptions to assist land managers in resource management. Text available as a *.zip file.
Description of the Geospatial Multi-Agency Coordination (GeoMAC) project, online maps of current wildland fire locations using Netscape Communicator or Microsoft Internet Explorer, and user guide on how to use mapping application.
Fact sheet on the historic and current conditions of mangroves of Dry Tortugas National Park, a cluster of islands and coral reefs west of Key West, Florida. Mangroves and nesting frigate bird colonies are at risk to destruction by hurricanes.
Tide stage, specific conductance, water temperature, and freshwater inflow at selected Hudson River (New York) gages updated every 4-hours to measure the effects of freshwater withdrawals and upstream movement of the salt front.
Airborne scanning laser surveys (LIDAR) are used to obtaining data to investigate the magnitude and causes of coastal changes that occur during severe storms. Links to examples of coastal mapping during specific hurricanes.
Description of the use of a miniature video-camera system deployed at nests of passerine species in North Dakota to videotape predation of eggs or nestlings by animals such as mice, ground squirrels, deer, cowbirds and others.
Landscapes of interwoven wetlands and uplands offer a rich set of ecosystem goods and services. Changes in climate and land use can affect the value of those services. We study these areas to understand how they may be changing.
We conducted a national landowner survey, evaluated short-term vegetation responses to land management practices (primarily grazing, haying, and burning), and initiating a long-term vegetation monitoring study for wetland buffers.
Will salt marshes survive if sea level rises quickly? The answer depends on whether the areas surrounding them can allow salt marsh fauna and flora to migrate there. Local topography, both natural and manmade, is the main factor limiting this migration.
Study to identify grasslands that may be suitable for cellulosic feedstock production. Producing ethanol from non-cropland areas such as grassland will minimize the effects of biofuel developments on global food supplies.
Multiple studies addressing urban water-quality issues, to describe biological, chemical, and physical characteristics of urban water resources over time, and relate those characteristics to natural processes and human activities
The Puget Sound Basin is a National Water Quality Assessment (NAWQA) Program study unit for studying the status, trends, and changes affecting the nation's water quality. Site links to data, publications, and results.
Report on the potential of coastal change due to future sea level rise using the coastal vulnerability index (C.V.I.) with two regional examples in San Francisco and Monterey Bay and Tillamook Head, Oregon, to Ocean Shores, WA.
Brief report on map showing the relative vulnerability of the Atlantic coast to changes due to future rise in sea level. Includes links to similar maps in Open-file report 2000-178 on the Pacific Coast and 2000-179 on the Gulf of Mexico Coast.
This study reconstructs past interactions among ecosystem factors, native species, and human land use in the Greater Yellowstone ecosystem to provide a context for future management to sustain both ecological and human communities.
Homepage for the Northern Prairie Wildlife Research Center, Jamestown, ND, with links to announcements, science prgorams, biological resources finder, publications search option, contacts, and answers to common questions about the Center
Overview of studies of fragile and active landscape of the American Southwest deserts, including projects on geologic mapping, surface processes, remote sensing research, ecological processes, and earthquake hazard applications.
Access to Patuxent Wildlife Research Center fact sheets (PDFs) providing summaries of center studies on coastal ecosystems, birds, amphibians, taxonomy and other subjects and on center activities including partners and volunteer program.
Research results (publications, photographs, maps) on ecological processes within the Mojave Desert Ecosystem to provide land managers with scientific understanding and tools needed to conserve and restore threatened desert landscapes.
Webpage on research on sea otters (Euhydra lutris) in the nearshore environment of the eastern Pacific Ocean with information on status of otters on the coast of Alaska, Washington, and California and link to fact sheet in PDF format.
Locations of survey points, a photographic record of each site, field observations of vegetation cover and descriptions of oil coverage in the water and on plants, including measurements of the distance of oil penetration from the shoreline.
A pictorial overview for general audiences of key landscapes and ecosystems in South Florida; includes extensive references and links to past and current research activities relating to the South Florida ecosystem restoration effort.
Overview of interdisciplinary research on the Tampa Bay estuary of the Gulf of Mexico with links to digital library, interactive mapping, reports, posters, water chemistry maps, meetings and conferences, scientist directory, and field trips.
An introduction to three related USGS digital libraries: the general-purpose Marine Realms Information Bank (MRIB); the regionally focused Monterey Bay Science (MBS) Digital Library; and the topically focused Coastal Change Hazards (CCH) Digital Library.
Monitoring soil temperature, soil moisture, air temperature, and overall thickness of the soil and sediment that is above the permafrost, therefore undergoing freeze-thaw cycles. Climate change may affect this active layer; we want to know how it does.
Long-term studies to better understand the effects of the eruption and the role of volcanism in structuring ecosystems in the Aleutian Islands, a volcano-dominated region with high natural resource values.
Overview of research in the Hawaiian Islands and Guam to gain insight into the structure of coral reefs, to provide the basis for future monitoring, and to understand the influences of natural processes and human activities on coral reef health.