Karen Thorne, Ph.D.
Dr. Karen Thorne is a Research Ecologist with the USGS Western Ecological Research Center,
Her research expertise is on coastal ecosystems and understanding ecosystem services, wetland ecology and restoration, impacts from inundation and storms, and nature-based solutions. She received her Ph.D. and MS from the University of California, Davis.
Dr. Thorne's interests lie in conservation and management issues surrounding coastal ecosystems within a changing environment and management landscape. The research she conducts is critical to understanding the role that coastal ecosystems provide, both environmentally and economically. The research she conducts specifically helps guide Federal, State, and local landowners and managers in planning for more resilient and adaptable habitats; assists in informing the impacts or benefits needed to maintain ecosystem values; and provides methods and tools that identify and help landowners and regulators improve the restoration needed to off-set anthropogenic impacts in coastal environments. Current research focuses include assessing flooding impacts to mangrove and marsh ecosystem processes. Also, understanding ecological processes for marsh, mangrove, and seagrass restoration to inform management in the U.S. and South Pacific islands. Her research is based on field data collection methods that can be used to inform decision-making for managing emerging concerns.
Professional Experience
Research Ecologist, USGS, Western Ecological Research Center, Davis Field Station, 2012 - present
Biologist, USGS, Western Ecological Research Center, San Francisco Bay Estuary Field Station, 2005 to 2012
Research Associate, U.S. Fish & Wildlife Service, Fairbanks, AK, 2002 to 2005
Education and Certifications
PhD, Geography, Global Change, University of California, Davis, 2012
MS, Geography, Environmental Studies, University of California, Davis, 2008
BS, Wildlife, Fish, & Conservation Biology, University of California, Davis 2000
Affiliations and Memberships*
California Landscape Conservation Cooperative Science Team
Science and Products
The Future Resiliency of Mangrove Forests to Sea-Level Rise in the Western Pacific: Initiating a National Assessment Approach
Coastal Ecosystem Response to Sea-level Rise
Modeling Sea-Level Rise in San Francisco Bay Estuary
Ecological Stressors - Rocky Coastlines, Mangroves, Marshes, Droughts, and Storms
Supporting Informed Responses to Sea-Level Rise
Climate Extremes and Ecological Impacts to California Estuaries
Davis Field Station
Improving Our Ability to Forecast Tidal Marsh Response to Sea Level Rise
Understanding the Impacts of Ecological Drought on Estuaries in the Pacific Northwest
Effects of Sea-Level Rise and Extreme Storms on California Coastal Habitats: Part 2
Effects of Sea-Level Rise and Extreme Storms on California Coastal Habitats: Part 1
Marshes to Mudflats: Climate Change Effects Along Coastal Estuaries in the Pacific Northwest
Data Describing Site Characteristics Including Conifer Regeneration Following the 2018 Carr Fire in Whiskeytown National Recreation Area Data Describing Site Characteristics Including Conifer Regeneration Following the 2018 Carr Fire in Whiskeytown National Recreation Area
Sediment deposition and accretion data from a tidal salt marsh in South San Francisco Bay, California 2021-2022 Sediment deposition and accretion data from a tidal salt marsh in South San Francisco Bay, California 2021-2022
Elevation and Mangrove Cover Projections under Sea-Level Rise Scenarios at J.N. Ding Darling National Wildlife Refuge, Sanibel Island, Florida, 2020-2100 Elevation and Mangrove Cover Projections under Sea-Level Rise Scenarios at J.N. Ding Darling National Wildlife Refuge, Sanibel Island, Florida, 2020-2100
Bias-Corrected Topobathymetric Elevation Model for South Florida, 2018 Bias-Corrected Topobathymetric Elevation Model for South Florida, 2018
Potential landward migration of coastal wetlands in response to sea-level rise within estuarine drainage areas and coastal states of the conterminous United States Potential landward migration of coastal wetlands in response to sea-level rise within estuarine drainage areas and coastal states of the conterminous United States
Estuarine drainage area boundaries for the conterminous United States Estuarine drainage area boundaries for the conterminous United States
Salt marsh monitoring during water years 2013 to 2019, Humboldt Bay, CA – water levels, surface deposition, elevation change, and carbon storage Salt marsh monitoring during water years 2013 to 2019, Humboldt Bay, CA – water levels, surface deposition, elevation change, and carbon storage
Surface Elevation Table Measurements at Five Tidal Marshes Across the San Francisco Bay-Delta (2016-2019) Surface Elevation Table Measurements at Five Tidal Marshes Across the San Francisco Bay-Delta (2016-2019)
Elevation Survey Across Southwest Florida Coastal Wetlands, 2021 Elevation Survey Across Southwest Florida Coastal Wetlands, 2021
Antioch Dunes evening primrose (Oenothera deltoides subsp. howellii) juvenile and adult abundance across the known range, California, USA (2019) Antioch Dunes evening primrose (Oenothera deltoides subsp. howellii) juvenile and adult abundance across the known range, California, USA (2019)
Tidal Wetland Elevation Projections for Five San Francisco Bay Delta Regions Using WARMER-2, 2000-2100 Tidal Wetland Elevation Projections for Five San Francisco Bay Delta Regions Using WARMER-2, 2000-2100
Soil, Plant, and Elevation Characteristics of Tidal and Managed Impounded Wetlands in Suisun Marsh, California, USA (2018-2019) Soil, Plant, and Elevation Characteristics of Tidal and Managed Impounded Wetlands in Suisun Marsh, California, USA (2018-2019)
Rising seas could cross thresholds for initiating coastal wetland drowning within decades across much of the United States Rising seas could cross thresholds for initiating coastal wetland drowning within decades across much of the United States
A comparison of eDNA sampling methods in an estuarine environment on presence of longfin smelt (Spirinchus thaleichthys) and fish community composition A comparison of eDNA sampling methods in an estuarine environment on presence of longfin smelt (Spirinchus thaleichthys) and fish community composition
Application of lidar to assess the habitat selection of an endangered small mammal in an estuarine wetland environment Application of lidar to assess the habitat selection of an endangered small mammal in an estuarine wetland environment
Understanding marsh elevation and accretion processes and vulnerability to rising sea levels across climatic and geomorphic gradients in California, USA Understanding marsh elevation and accretion processes and vulnerability to rising sea levels across climatic and geomorphic gradients in California, USA
Stress gradients structure spatial variability in coastal tidal marsh plant composition and diversity in a major Pacific coast estuary Stress gradients structure spatial variability in coastal tidal marsh plant composition and diversity in a major Pacific coast estuary
Observing coastal wetland transitions using national land cover products Observing coastal wetland transitions using national land cover products
Foundations of modeling resilience of tidal saline wetlands to sea-level rise along the U.S. Pacific Coast Foundations of modeling resilience of tidal saline wetlands to sea-level rise along the U.S. Pacific Coast
Spatially explicit models of seed availability improve predictions of conifer regeneration following the 2018 Carr Fire in northern California Spatially explicit models of seed availability improve predictions of conifer regeneration following the 2018 Carr Fire in northern California
Mangrove habitat persistence and carbon vulnerability associated with increased nutrient loading and sea-level rise at Ding Darling National Wildlife Refuge (Sanibel Island, Florida, USA) Mangrove habitat persistence and carbon vulnerability associated with increased nutrient loading and sea-level rise at Ding Darling National Wildlife Refuge (Sanibel Island, Florida, USA)
Future marsh evolution due to tidal changes induced by human adaptation to sea level rise Future marsh evolution due to tidal changes induced by human adaptation to sea level rise
Phenotypic trait differences between Iris pseudacorus in native and introduced ranges support greater capacity of invasive populations to withstand sea level rise Phenotypic trait differences between Iris pseudacorus in native and introduced ranges support greater capacity of invasive populations to withstand sea level rise
A summary of water-quality and salt marsh monitoring, Humboldt Bay, California A summary of water-quality and salt marsh monitoring, Humboldt Bay, California
Science and Products
The Future Resiliency of Mangrove Forests to Sea-Level Rise in the Western Pacific: Initiating a National Assessment Approach
Coastal Ecosystem Response to Sea-level Rise
Modeling Sea-Level Rise in San Francisco Bay Estuary
Ecological Stressors - Rocky Coastlines, Mangroves, Marshes, Droughts, and Storms
Supporting Informed Responses to Sea-Level Rise
Climate Extremes and Ecological Impacts to California Estuaries
Davis Field Station
Improving Our Ability to Forecast Tidal Marsh Response to Sea Level Rise
Understanding the Impacts of Ecological Drought on Estuaries in the Pacific Northwest
Effects of Sea-Level Rise and Extreme Storms on California Coastal Habitats: Part 2
Effects of Sea-Level Rise and Extreme Storms on California Coastal Habitats: Part 1
Marshes to Mudflats: Climate Change Effects Along Coastal Estuaries in the Pacific Northwest
Data Describing Site Characteristics Including Conifer Regeneration Following the 2018 Carr Fire in Whiskeytown National Recreation Area Data Describing Site Characteristics Including Conifer Regeneration Following the 2018 Carr Fire in Whiskeytown National Recreation Area
Sediment deposition and accretion data from a tidal salt marsh in South San Francisco Bay, California 2021-2022 Sediment deposition and accretion data from a tidal salt marsh in South San Francisco Bay, California 2021-2022
Elevation and Mangrove Cover Projections under Sea-Level Rise Scenarios at J.N. Ding Darling National Wildlife Refuge, Sanibel Island, Florida, 2020-2100 Elevation and Mangrove Cover Projections under Sea-Level Rise Scenarios at J.N. Ding Darling National Wildlife Refuge, Sanibel Island, Florida, 2020-2100
Bias-Corrected Topobathymetric Elevation Model for South Florida, 2018 Bias-Corrected Topobathymetric Elevation Model for South Florida, 2018
Potential landward migration of coastal wetlands in response to sea-level rise within estuarine drainage areas and coastal states of the conterminous United States Potential landward migration of coastal wetlands in response to sea-level rise within estuarine drainage areas and coastal states of the conterminous United States
Estuarine drainage area boundaries for the conterminous United States Estuarine drainage area boundaries for the conterminous United States
Salt marsh monitoring during water years 2013 to 2019, Humboldt Bay, CA – water levels, surface deposition, elevation change, and carbon storage Salt marsh monitoring during water years 2013 to 2019, Humboldt Bay, CA – water levels, surface deposition, elevation change, and carbon storage
Surface Elevation Table Measurements at Five Tidal Marshes Across the San Francisco Bay-Delta (2016-2019) Surface Elevation Table Measurements at Five Tidal Marshes Across the San Francisco Bay-Delta (2016-2019)
Elevation Survey Across Southwest Florida Coastal Wetlands, 2021 Elevation Survey Across Southwest Florida Coastal Wetlands, 2021
Antioch Dunes evening primrose (Oenothera deltoides subsp. howellii) juvenile and adult abundance across the known range, California, USA (2019) Antioch Dunes evening primrose (Oenothera deltoides subsp. howellii) juvenile and adult abundance across the known range, California, USA (2019)
Tidal Wetland Elevation Projections for Five San Francisco Bay Delta Regions Using WARMER-2, 2000-2100 Tidal Wetland Elevation Projections for Five San Francisco Bay Delta Regions Using WARMER-2, 2000-2100
Soil, Plant, and Elevation Characteristics of Tidal and Managed Impounded Wetlands in Suisun Marsh, California, USA (2018-2019) Soil, Plant, and Elevation Characteristics of Tidal and Managed Impounded Wetlands in Suisun Marsh, California, USA (2018-2019)
Rising seas could cross thresholds for initiating coastal wetland drowning within decades across much of the United States Rising seas could cross thresholds for initiating coastal wetland drowning within decades across much of the United States
A comparison of eDNA sampling methods in an estuarine environment on presence of longfin smelt (Spirinchus thaleichthys) and fish community composition A comparison of eDNA sampling methods in an estuarine environment on presence of longfin smelt (Spirinchus thaleichthys) and fish community composition
Application of lidar to assess the habitat selection of an endangered small mammal in an estuarine wetland environment Application of lidar to assess the habitat selection of an endangered small mammal in an estuarine wetland environment
Understanding marsh elevation and accretion processes and vulnerability to rising sea levels across climatic and geomorphic gradients in California, USA Understanding marsh elevation and accretion processes and vulnerability to rising sea levels across climatic and geomorphic gradients in California, USA
Stress gradients structure spatial variability in coastal tidal marsh plant composition and diversity in a major Pacific coast estuary Stress gradients structure spatial variability in coastal tidal marsh plant composition and diversity in a major Pacific coast estuary
Observing coastal wetland transitions using national land cover products Observing coastal wetland transitions using national land cover products
Foundations of modeling resilience of tidal saline wetlands to sea-level rise along the U.S. Pacific Coast Foundations of modeling resilience of tidal saline wetlands to sea-level rise along the U.S. Pacific Coast
Spatially explicit models of seed availability improve predictions of conifer regeneration following the 2018 Carr Fire in northern California Spatially explicit models of seed availability improve predictions of conifer regeneration following the 2018 Carr Fire in northern California
Mangrove habitat persistence and carbon vulnerability associated with increased nutrient loading and sea-level rise at Ding Darling National Wildlife Refuge (Sanibel Island, Florida, USA) Mangrove habitat persistence and carbon vulnerability associated with increased nutrient loading and sea-level rise at Ding Darling National Wildlife Refuge (Sanibel Island, Florida, USA)
Future marsh evolution due to tidal changes induced by human adaptation to sea level rise Future marsh evolution due to tidal changes induced by human adaptation to sea level rise
Phenotypic trait differences between Iris pseudacorus in native and introduced ranges support greater capacity of invasive populations to withstand sea level rise Phenotypic trait differences between Iris pseudacorus in native and introduced ranges support greater capacity of invasive populations to withstand sea level rise
A summary of water-quality and salt marsh monitoring, Humboldt Bay, California A summary of water-quality and salt marsh monitoring, Humboldt Bay, California
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government