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Isa Woo (Former Employee)

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Scientist collecting contents of invertebrate trap in Nisqually River Delta

Wetland Restoration in the San Francisco Bay Delta and Pacific Northwest

Estuaries and healthy coastal habitats are among the most productive ecosystems on Earth. They provide a variety of benefits, including habitat and food for fish and wildlife, flood and erosion protection, improved water quality, increased carbon sequestration, as well as beautiful scenery and opportunities for recreation. Along the U.S. Pacific Coast, both the San Francisco Bay estuary and the...
By
Ecosystems Mission Area, Land Management Research Program, Western Ecological Research Center (WERC)
Wetland Restoration in the San Francisco Bay Delta and Pacific Northwest

Wetland Restoration in the San Francisco Bay Delta and Pacific Northwest

Estuaries and healthy coastal habitats are among the most productive ecosystems on Earth. They provide a variety of benefits, including habitat and food for fish and wildlife, flood and erosion protection, improved water quality, increased carbon sequestration, as well as beautiful scenery and opportunities for recreation. Along the U.S. Pacific Coast, both the San Francisco Bay estuary and the...
Learn More
Filter Total Items: 15

Biofilm Percent Cover Maps in San Francisco Bay, 2020-2022 Biofilm Percent Cover Maps in San Francisco Bay, 2020-2022

This data release includes 9 GeoTIFF rasters that represent percent cover of intertidal microbial biofilm on the mudflats of South San Francisco Bay, CA between June 2020, and June 2022. Rasters follow the naming scheme biofilmPC_YYYYMMDD_10m.tif, where “biofilmPC” describes the dataset, YYYYMMDD is the date of the image, and 10m is the spatial resolution of the raster. Raster data...
By
Western Geographic Science Center

Aquatic Prey Resources in Response to Estuary Restoration in Willapa Bay, Washington (2014-2015) Aquatic Prey Resources in Response to Estuary Restoration in Willapa Bay, Washington (2014-2015)

The ongoing restoration of more than 200 hectares of estuarine habitat at Willapa National Wildlife Refuge, southwestern Washington, is expected to benefit a variety of species, including salmonids that use estuarine and tidal marshes as rearing and feeding areas as well as migratory waterbirds. During March through June 2014 and 2015, this study was initiated to assess aquatic prey...
By
Western Ecological Research Center (WERC)

Biological Tissue Data Used to Evaluate Selenium Hazards in the Salton Sea Ecosystem (1984-2020) Biological Tissue Data Used to Evaluate Selenium Hazards in the Salton Sea Ecosystem (1984-2020)

In response to the rapidly evolving conditions at the Salton Sea with the emergence of both newly formed wetland habitat and increasing hazards to wildlife, the U.S. Bureau of Reclamation and U.S. Geological Survey have funded a re-evaluation of data gaps regarding selenium concentrations in biota the region. As part of this work, selenium concentrations in biological tissue samples were...
By
Western Ecological Research Center (WERC)

Projected future habitat, elevation change, and carbon accumulation of coastal wetlands in the Nisqually River Delta, Washington Projected future habitat, elevation change, and carbon accumulation of coastal wetlands in the Nisqually River Delta, Washington

This dataset consists of raster geotiff outputs from modeling habitat change, marsh vertical accretion, and carbon accumulation in the Nisqually River Delta, Washington, USA. These rasters represent projections of future habitat type, change in surface elevation above Mean Sea Level, and total sediment carbon accumulation since 2011 in coastal wetland habitats. Projections were generated...
By
Western Geographic Science Center

Sediment Biogeochemistry and Subsequent Mercury Biomagnification in Wetland Food Webs of the San Francisco Bay, CA (ver. 2.0, December 2023) Sediment Biogeochemistry and Subsequent Mercury Biomagnification in Wetland Food Webs of the San Francisco Bay, CA (ver. 2.0, December 2023)

Methylmercury (MeHg) is a globally pervasive contaminant that biomagnifies in food webs and can reach toxic concentrations in consumers at higher trophic levels, including wildlife and humans. The production of MeHg, and its subsequent entry and biomagnification in food webs, is governed by a complex suite of biogeochemical, physical, and ecological processes, resulting in spatial...
By
Western Ecological Research Center (WERC)

Western sandpiper diet composition in south San Francisco Bay, CA Western sandpiper diet composition in south San Francisco Bay, CA

Diet composition can be influenced by age- and sex-related factors including an individual's morphology, social status, and acquired skills; however, specialization may only be necessary when competition is intensified by high population densities or increased energetic demands. The western sandpiper is a small (22-35 grams) migratory shorebird that exhibits female-biased sexual size...
By
Western Ecological Research Center (WERC)
Filter Total Items: 40

Nisqually River Delta—Humans and nature benefiting together Nisqually River Delta—Humans and nature benefiting together

Introduction This is a brochure created in partnership with the U.S. Geological Survey (USGS), the Nisqually Indian Tribe, and the Billy Frank Jr. Nisqually National Wildlife Refuge. Designed for a public audience, the brochure describes the history of the Nisqually Indian Tribe, the ecology of the delta, the resources and recreational opportunities available for Refuge visitors, future...
Authors
Kristin Byrd, Isa Woo, Glynnis Nakai, Debbie Preston, Shonte Jenkins
By
Science and Decisions Center

Linking meso-scale spatial variation in methylmercury production to bioaccumulation in tidal marsh food webs Linking meso-scale spatial variation in methylmercury production to bioaccumulation in tidal marsh food webs

Differences in sediment biogeochemistry among tidal marsh features with different hydrological and geomorphological characteristics, including marsh interiors, marsh edges, first-order channels, and third-order channels, can result in spatial variation in MeHg production and availability. To better understand the link between MeHg production in sediments and bioaccumulation in primary...
Authors
Laurie Hall, Isa Woo, Mark Marvin-DiPasquale, John Y. Takekawa, David Krabbenhoft, Donald Yee, Letitia Grenier, Susan De La Cruz
By
Ecosystems Mission Area, Western Ecological Research Center (WERC)

Selenium hazards in the Salton Sea environment—Summary of current knowledge to inform future wetland management Selenium hazards in the Salton Sea environment—Summary of current knowledge to inform future wetland management

Quaternary marine and continental shales in the western United States are sources of selenium that can be loaded into the aquatic environment through mining, agricultural, and energy production processes. The mobilization of selenium from shales through agricultural irrigation has been recognized since the 1930s; however, discovery of deformities in birds and other wildlife using...
Authors
Michael Rosen, Susan De La Cruz, Krishangi Groover, Isa Woo, Sarah Roberts, Melanie Davis, Cristiana Antonino
By
Ecosystems Mission Area, Water Resources Mission Area, Western Ecological Research Center (WERC), California Water Science Center

Assessing small-mammal trapping design using spatially explicit capture recapture (SECR) modeling on long-term monitoring data Assessing small-mammal trapping design using spatially explicit capture recapture (SECR) modeling on long-term monitoring data

Few studies have evaluated the optimal sampling design for tracking small mammal population trends, especially for rare or difficult to detect species. Spatially explicit capture-recapture (SECR) models present an advancement over non-spatial models by accounting for individual movement when estimating density. The salt marsh harvest mouse (SMHM; Reithrodontomys raviventris) is a federal...
Authors
Chase Freeman, Laureen Barthman-Thompson, Robert Klinger, Isa Woo, Karen M. Thorne
By
Ecosystems Mission Area, Western Ecological Research Center (WERC)

Can coastal habitats rise to the challenge? Resilience of estuarine habitats, carbon accumulation, and economic value to sea-level rise in a Puget Sound estuary Can coastal habitats rise to the challenge? Resilience of estuarine habitats, carbon accumulation, and economic value to sea-level rise in a Puget Sound estuary

Sea-level rise (SLR) and obstructions to sediment delivery pose challenges to the persistence of estuarine habitats and the ecosystem services they provide. Restoration actions and sediment management strategies may help mitigate such challenges by encouraging the vertical accretion of sediment in and horizontal migration of tidal forests and marshes. We used a process-based soil...
Authors
Monica Moritsch, Kristin Byrd, Melanie Davis, Anthony Good, Judith Drexler, James Morris, Isa Woo, Lisamarie Windham-Myers, Eric Grossman, Glynnis Nakai, Katrina Poppe, John Rybczyk
By
Ecosystems Mission Area, Water Resources Mission Area, Land Management Research Program, Science and Decisions Center, California Water Science Center, Pacific Coastal and Marine Science Center, Western Ecological Research Center (WERC), Western Geographic Science Center

A climate-mediated shift in the estuarine habitat mosaic limits prey availability and reduces nursery quality for juvenile salmon A climate-mediated shift in the estuarine habitat mosaic limits prey availability and reduces nursery quality for juvenile salmon

The estuarine habitat mosaic supports the reproduction, growth, and survival of resident and migratory fish species by providing a diverse portfolio of unique habitats with varying physical and biological features. Global climate change is expected to result in increasing temperatures, rising sea levels, and changes in riverine hydrology, which will have profound effects on the extent...
Authors
Melanie Davis, Isa Woo, Christopher Ellings, Sayre Hodgson, David Beauchamp, Glynnis Nakai, Susan De La Cruz
By
Ecosystems Mission Area, Cooperative Research Units, Species Management Research Program, Western Ecological Research Center (WERC), Western Fisheries Research Center

Science and Products

Scientist collecting contents of invertebrate trap in Nisqually River Delta

Wetland Restoration in the San Francisco Bay Delta and Pacific Northwest

Estuaries and healthy coastal habitats are among the most productive ecosystems on Earth. They provide a variety of benefits, including habitat and food for fish and wildlife, flood and erosion protection, improved water quality, increased carbon sequestration, as well as beautiful scenery and opportunities for recreation. Along the U.S. Pacific Coast, both the San Francisco Bay estuary and the...
By
Ecosystems Mission Area, Land Management Research Program, Western Ecological Research Center (WERC)
Wetland Restoration in the San Francisco Bay Delta and Pacific Northwest

Wetland Restoration in the San Francisco Bay Delta and Pacific Northwest

Estuaries and healthy coastal habitats are among the most productive ecosystems on Earth. They provide a variety of benefits, including habitat and food for fish and wildlife, flood and erosion protection, improved water quality, increased carbon sequestration, as well as beautiful scenery and opportunities for recreation. Along the U.S. Pacific Coast, both the San Francisco Bay estuary and the...
Learn More
Filter Total Items: 15

Biofilm Percent Cover Maps in San Francisco Bay, 2020-2022 Biofilm Percent Cover Maps in San Francisco Bay, 2020-2022

This data release includes 9 GeoTIFF rasters that represent percent cover of intertidal microbial biofilm on the mudflats of South San Francisco Bay, CA between June 2020, and June 2022. Rasters follow the naming scheme biofilmPC_YYYYMMDD_10m.tif, where “biofilmPC” describes the dataset, YYYYMMDD is the date of the image, and 10m is the spatial resolution of the raster. Raster data...
By
Western Geographic Science Center

Aquatic Prey Resources in Response to Estuary Restoration in Willapa Bay, Washington (2014-2015) Aquatic Prey Resources in Response to Estuary Restoration in Willapa Bay, Washington (2014-2015)

The ongoing restoration of more than 200 hectares of estuarine habitat at Willapa National Wildlife Refuge, southwestern Washington, is expected to benefit a variety of species, including salmonids that use estuarine and tidal marshes as rearing and feeding areas as well as migratory waterbirds. During March through June 2014 and 2015, this study was initiated to assess aquatic prey...
By
Western Ecological Research Center (WERC)

Biological Tissue Data Used to Evaluate Selenium Hazards in the Salton Sea Ecosystem (1984-2020) Biological Tissue Data Used to Evaluate Selenium Hazards in the Salton Sea Ecosystem (1984-2020)

In response to the rapidly evolving conditions at the Salton Sea with the emergence of both newly formed wetland habitat and increasing hazards to wildlife, the U.S. Bureau of Reclamation and U.S. Geological Survey have funded a re-evaluation of data gaps regarding selenium concentrations in biota the region. As part of this work, selenium concentrations in biological tissue samples were...
By
Western Ecological Research Center (WERC)

Projected future habitat, elevation change, and carbon accumulation of coastal wetlands in the Nisqually River Delta, Washington Projected future habitat, elevation change, and carbon accumulation of coastal wetlands in the Nisqually River Delta, Washington

This dataset consists of raster geotiff outputs from modeling habitat change, marsh vertical accretion, and carbon accumulation in the Nisqually River Delta, Washington, USA. These rasters represent projections of future habitat type, change in surface elevation above Mean Sea Level, and total sediment carbon accumulation since 2011 in coastal wetland habitats. Projections were generated...
By
Western Geographic Science Center

Sediment Biogeochemistry and Subsequent Mercury Biomagnification in Wetland Food Webs of the San Francisco Bay, CA (ver. 2.0, December 2023) Sediment Biogeochemistry and Subsequent Mercury Biomagnification in Wetland Food Webs of the San Francisco Bay, CA (ver. 2.0, December 2023)

Methylmercury (MeHg) is a globally pervasive contaminant that biomagnifies in food webs and can reach toxic concentrations in consumers at higher trophic levels, including wildlife and humans. The production of MeHg, and its subsequent entry and biomagnification in food webs, is governed by a complex suite of biogeochemical, physical, and ecological processes, resulting in spatial...
By
Western Ecological Research Center (WERC)

Western sandpiper diet composition in south San Francisco Bay, CA Western sandpiper diet composition in south San Francisco Bay, CA

Diet composition can be influenced by age- and sex-related factors including an individual's morphology, social status, and acquired skills; however, specialization may only be necessary when competition is intensified by high population densities or increased energetic demands. The western sandpiper is a small (22-35 grams) migratory shorebird that exhibits female-biased sexual size...
By
Western Ecological Research Center (WERC)
Filter Total Items: 40

Nisqually River Delta—Humans and nature benefiting together Nisqually River Delta—Humans and nature benefiting together

Introduction This is a brochure created in partnership with the U.S. Geological Survey (USGS), the Nisqually Indian Tribe, and the Billy Frank Jr. Nisqually National Wildlife Refuge. Designed for a public audience, the brochure describes the history of the Nisqually Indian Tribe, the ecology of the delta, the resources and recreational opportunities available for Refuge visitors, future...
Authors
Kristin Byrd, Isa Woo, Glynnis Nakai, Debbie Preston, Shonte Jenkins
By
Science and Decisions Center

Linking meso-scale spatial variation in methylmercury production to bioaccumulation in tidal marsh food webs Linking meso-scale spatial variation in methylmercury production to bioaccumulation in tidal marsh food webs

Differences in sediment biogeochemistry among tidal marsh features with different hydrological and geomorphological characteristics, including marsh interiors, marsh edges, first-order channels, and third-order channels, can result in spatial variation in MeHg production and availability. To better understand the link between MeHg production in sediments and bioaccumulation in primary...
Authors
Laurie Hall, Isa Woo, Mark Marvin-DiPasquale, John Y. Takekawa, David Krabbenhoft, Donald Yee, Letitia Grenier, Susan De La Cruz
By
Ecosystems Mission Area, Western Ecological Research Center (WERC)

Selenium hazards in the Salton Sea environment—Summary of current knowledge to inform future wetland management Selenium hazards in the Salton Sea environment—Summary of current knowledge to inform future wetland management

Quaternary marine and continental shales in the western United States are sources of selenium that can be loaded into the aquatic environment through mining, agricultural, and energy production processes. The mobilization of selenium from shales through agricultural irrigation has been recognized since the 1930s; however, discovery of deformities in birds and other wildlife using...
Authors
Michael Rosen, Susan De La Cruz, Krishangi Groover, Isa Woo, Sarah Roberts, Melanie Davis, Cristiana Antonino
By
Ecosystems Mission Area, Water Resources Mission Area, Western Ecological Research Center (WERC), California Water Science Center

Assessing small-mammal trapping design using spatially explicit capture recapture (SECR) modeling on long-term monitoring data Assessing small-mammal trapping design using spatially explicit capture recapture (SECR) modeling on long-term monitoring data

Few studies have evaluated the optimal sampling design for tracking small mammal population trends, especially for rare or difficult to detect species. Spatially explicit capture-recapture (SECR) models present an advancement over non-spatial models by accounting for individual movement when estimating density. The salt marsh harvest mouse (SMHM; Reithrodontomys raviventris) is a federal...
Authors
Chase Freeman, Laureen Barthman-Thompson, Robert Klinger, Isa Woo, Karen M. Thorne
By
Ecosystems Mission Area, Western Ecological Research Center (WERC)

Can coastal habitats rise to the challenge? Resilience of estuarine habitats, carbon accumulation, and economic value to sea-level rise in a Puget Sound estuary Can coastal habitats rise to the challenge? Resilience of estuarine habitats, carbon accumulation, and economic value to sea-level rise in a Puget Sound estuary

Sea-level rise (SLR) and obstructions to sediment delivery pose challenges to the persistence of estuarine habitats and the ecosystem services they provide. Restoration actions and sediment management strategies may help mitigate such challenges by encouraging the vertical accretion of sediment in and horizontal migration of tidal forests and marshes. We used a process-based soil...
Authors
Monica Moritsch, Kristin Byrd, Melanie Davis, Anthony Good, Judith Drexler, James Morris, Isa Woo, Lisamarie Windham-Myers, Eric Grossman, Glynnis Nakai, Katrina Poppe, John Rybczyk
By
Ecosystems Mission Area, Water Resources Mission Area, Land Management Research Program, Science and Decisions Center, California Water Science Center, Pacific Coastal and Marine Science Center, Western Ecological Research Center (WERC), Western Geographic Science Center

A climate-mediated shift in the estuarine habitat mosaic limits prey availability and reduces nursery quality for juvenile salmon A climate-mediated shift in the estuarine habitat mosaic limits prey availability and reduces nursery quality for juvenile salmon

The estuarine habitat mosaic supports the reproduction, growth, and survival of resident and migratory fish species by providing a diverse portfolio of unique habitats with varying physical and biological features. Global climate change is expected to result in increasing temperatures, rising sea levels, and changes in riverine hydrology, which will have profound effects on the extent...
Authors
Melanie Davis, Isa Woo, Christopher Ellings, Sayre Hodgson, David Beauchamp, Glynnis Nakai, Susan De La Cruz
By
Ecosystems Mission Area, Cooperative Research Units, Species Management Research Program, Western Ecological Research Center (WERC), Western Fisheries Research Center
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