Species and Habitat | U.S. Geological Survey (2024)

Our research goals are to provide the scientific information, knowledge, and tools required to ensure that decisions about land and resource use, management practices, and future development in the coastal zone and adjacent watersheds can be evaluated with a complete understanding of the probable effects on coastal ecosystems and communities, and a full assessment of their vulnerability to natural...

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July 1, 2022

Sediment Transport in Coastal Environments

Our research goals are to provide the scientific information, knowledge, and tools required to ensure that decisions about land and resource use, management practices, and future development in the coastal zone and adjacent watersheds can be evaluated with a complete understanding of the probable effects on coastal ecosystems and communities, and a full assessment of their vulnerability to natural...

We investigate mechanisms of sediment transport, resuspension dynamics in shoals, wave evolution in the shallows, wave attenuation in marshes, and transport of sediment between mudflats and marshes. We produce data sets for calibration of and comparison with sediment transport models, including wave parameters, suspended sediment concentration, and sediment flux.

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October 15, 2021

Sediment transport between estuarine habitats in San Francisco Bay

We investigate mechanisms of sediment transport, resuspension dynamics in shoals, wave evolution in the shallows, wave attenuation in marshes, and transport of sediment between mudflats and marshes. We produce data sets for calibration of and comparison with sediment transport models, including wave parameters, suspended sediment concentration, and sediment flux.

Research on bed sediment grain size, bedform morphology, vegetation characteristics, and sediment resuspension and transport.

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October 14, 2021

Drag and sediment transport: conditions at the bottom boundary

Research on bed sediment grain size, bedform morphology, vegetation characteristics, and sediment resuspension and transport.

The Sacramento-San Joaquin Delta (Delta) is home to a diverse community of plants and animals and is the hub of California’s freshwater delivery system. The Delta supplies water for over 25 million Californians and supports millions of acres of farming, commercial and sport fishing, shipping and ports, and recreational boating.

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December 6, 2018

Ecosystem Engineers: Impacts of Invasive Aquatic Vegetation on the Delta’s Critical Ecosystems

The Sacramento-San Joaquin Delta (Delta) is home to a diverse community of plants and animals and is the hub of California’s freshwater delivery system. The Delta supplies water for over 25 million Californians and supports millions of acres of farming, commercial and sport fishing, shipping and ports, and recreational boating.

The marshes, floodplains, and riparian corridors (areas along streams and rivers) of the Bay-Delta are key wintering destinations for migratory waterbirds and serve as a crucial stopover on the Pacific Flyway (a major north-south route for birds, extending from Alaska to the tip of South America). The mosaic of wetland habitat types within the Bay-Delta is essential for the millions of shorebirds...

August 11, 2016

Avian Studies

The marshes, floodplains, and riparian corridors (areas along streams and rivers) of the Bay-Delta are key wintering destinations for migratory waterbirds and serve as a crucial stopover on the Pacific Flyway (a major north-south route for birds, extending from Alaska to the tip of South America). The mosaic of wetland habitat types within the Bay-Delta is essential for the millions of shorebirds...

USGS actively participates in fish research in the Sacramento-San Joaquin Delta.

August 10, 2016

Fish Studies

USGS actively participates in fish research in the Sacramento-San Joaquin Delta.

In addition to studying birds and fish, the USGS monitors benthic (bottom dwelling) invertebrate communities (crustaceans, worms, and bivalves, including invasive clams) in the Bay-Delta.

August 9, 2016

Bottom-Dwelling (Benthic) Invertebrates

In addition to studying birds and fish, the USGS monitors benthic (bottom dwelling) invertebrate communities (crustaceans, worms, and bivalves, including invasive clams) in the Bay-Delta.

Large-scale conversion of wetland habitats to agricultural and other uses in the Bay-Delta and California’s Central Valley is the major threat to species that rely on these habitats.

August 8, 2016

Protected Terrestrial Species

Large-scale conversion of wetland habitats to agricultural and other uses in the Bay-Delta and California’s Central Valley is the major threat to species that rely on these habitats.

USGS research in the Bay-Delta assesses and informs habitat-restoration activities and contributes to comprehensive ecosystem planning documents for the Bay-Delta, such as the Delta Plan.

August 7, 2016

Habitat Restoration

USGS research in the Bay-Delta assesses and informs habitat-restoration activities and contributes to comprehensive ecosystem planning documents for the Bay-Delta, such as the Delta Plan.

USGS scientists are studying sediment transport (including the supply, movement, and deposition of sediment) in the Bay-Delta system.

August 6, 2016

Marsh Sustainability

USGS scientists are studying sediment transport (including the supply, movement, and deposition of sediment) in the Bay-Delta system.