Filters: Contacts: Chase M Freeman (X) > partyWithName: U.S. Geological Survey - ScienceBase (X)

Filters Date Range Past year (1) Past month (0) Past week (0) Past day (0) Custom range... To   Search Contacts Karen M Thorne Chase M Freeman Jennifer A Curtis Western Ecological Research Center U.S. Geological Survey More... Categories Data (5) Tag Types Theme (7) Place (7) USGS Scientific Topic Keyword (4) Harvest Set (5) Tag Schemes None (5) USGS Thesaurus (7) Common geographic areas (6) ISO 19115 Topic Category (6) Geographic Names Information System (1) Coastal and Marine Ecological Classification Standard (1) View Results as: JSON ATOM CSV

Salt marsh monitoring during water years 2013 to 2019, Humboldt Bay, CA – water levels, surface deposition, elevation change, and carbon storage This data release includes monitoring data collected by the U.S. Geological Survey (USGS) Humboldt Bay Water Quality and Salt Marsh Monitoring Project. The datasets include continuous water levels collected at a 6-minute timestep collected in two study marshes (Mad River and Hookton). Surface deposition, elevation changes and carbon storage (in marsh edge environments) measured in five USGS study marshes (Mad River, Manila, Jacoby, White and Hookton). The monitoring data presented in this data release represent fundamental datasets needed to manage blue carbon stocks, assess marsh vulnerability, inform SLR adaptation planning, and build coastal resiliency to climate change in Humboldt Bay, CA Additional documentaton... Tags: California, Ecology, Hookton Slough, Hookton marsh, Humboldt Bay, All tags... Humboldt County, Jacoby marsh, Mad River Slough, Mad River marsh, Manila marsh, SET MH, Sedimentology, USGS Science Data Catalog (SDC), White Slough, White marsh, blue carbon, carbon storage, elevation change, estuarine processes, feldspar marker horizon, inundation, marsh accretion, marsh ecosystems, salt marsh, surface deposition, surface elevation table, Fewer tags Surface deposition and elevation change in five salt marshes, Humboldt Bay, CA, 2014-2019 Elevation change and surface deposition are important drivers of salt marsh ecological processes and represent two of the fundamental variables for determining marsh resilience to sea-level rise. Surface Elevation Tables with Marker Horizons (SET-MH) were used to measure plot-scale elevation change (SETs) and surface deposition (MHs) in five USGS study marshes located in Humboldt Bay, CA. SET-MHs were installed in 2014 (Mad River marsh and Manila marsh) and in 2015 (Jacoby marsh, White marsh, and Hookton marsh) and were measured during quarterly site visits. The SET-MH network includes two SETs and six MHs in each of the five study marshes. Measuring elevation change at the two SETs in each study marsh involves... Categories: Data; Tags: California, Hookton marsh, Humboldt Bay, Humboldt County, Jacoby marsh, All tags... Mad River marsh, Manila marsh, SET MH, White marsh, accretion, biota, estuarine processes, marsh ecosystems, salt marsh, surface deposition, Fewer tags Water level and barometric pressure measurements in two salt marshes, Humboldt Bay, CA, 2016-2019 Water levels are an important driver of salt marsh processes. In 2016, pressure-transducing data loggers (LT Edge Model 3001, Solinst and Hobo Model U-20-001-01-Ti) and barometric-pressure loggers (Model 3001, Solinst) were deployed in two USGS study marshes (Mad River marsh and Hookton marsh) located in Humboldt Bay, CA. The loggers were placed as low in the tide frame as possible, while still maintaining access to the sensors at low tide. Sensors captured high tide water levels; but sensor elevation was too high to capture low tide water levels. Continuous measurements were collected on a 6-minute timestep. Sensor elevations were surveyed using Real-Time Kinematic GPS (Leica GS-15, Leica Geosystems, Norcross,... Categories: Data; Tags: California, Hookton marsh, Humboldt Bay, Humboldt County, Mad River marsh, All tags... Manila marsh, White marsh, biota, estuarine processes, inundation, marsh ecosystems, salt marsh, water level, Fewer tags Small Mammal Surveys from Northern San Francisco Bay: 1998-2014 This datasets summarizes small mammal trapping efforts that USGS San Francisco Bay Estuary Field Station has led, co-led, or supervised, to detect and monitor the endangered salt marsh harvest mouse (Reithrodontomys raviventris) in the northern reaches of San Francisco Bay from 1998-2014. As the salt marsh harvest mouse is listed as endangered under the Endangered Species Act, sensitive location information can be made available upon request by contacting the dataset point of contact. These data support the following publication: Marcot, B.G., Woo, I., Thorne, K.M., Freeman, C.M., and Guntenspergen, G.R., 2020. Habitat of the endangered salt marsh harvest mouse (Reithrodontomys raviventris) in San Francisco Bay.... Categories: Data; Tags: San Francisco Bay, San Pablo Bay, USGS Science Data Catalog (SDC), Wildlife Biology, biota, All tags... capturing (animals), endangered species, habitat use, habitats, mammals, small mammal assemblage, vegetation, wildlife, Fewer tags UAS Imagery at Whiskeytown National Recreation Area in 2018 and 2019 following the Carr Fire Raw aerial photography, orthorectified imagery, point cloud data, and digital elevation models (DEMs) for Whiskeytown National Recreation Area (NRA) following the Carr Fire. Sites within the NRA include: Lower Crystal Creek, Tower House, Grizzly Gulch, Boulder Creek South Shore and Conifer, Brandy Creek Camp, Shasta Divide, Paige Bar (North, NEED Camp, East, and Southeast), Chinese Laundry, and Coggins Park. Imagery was collected with two sensors (Ricoh GR II and MicaSense RedEdge) on a quadcopter flown at 400 feet above ground level immediately following the Carr Fire (October 2018) and 8-9 months after the fire (May and June 2019). Due to access, not all sites were flown during both collection periods. U.S. Geological... Tags: Ecology, Forestry, Remote Sensing, USGS Science Data Catalog (SDC), Whiskeytown, All tags... Whiskeytown-Shasta-Trinity National Recreation Area, aerial photography, environment, fire damage, fires, forest ecosystems, forest resources, geoscientificInformation, imageryBaseMapsEarthCover, remote sensing, Fewer tags Antioch Dunes Evening Primrose (Oenothera deltoides subsp. howellii) Juvenile and Adult Abundance Across the Known Range, California, USA (2019) These datasets provide information on total plant cover, Normalized Difference Vegetation Index, and Antioch Dunes evening primrose (Oenothera deltoides subsp. howellii) abundance within grids across the subspecies' extant range in California. These data support the following publication: Jones, S.F., Kennedy, A., Freeman, C.M. et al. Intensity of grass invasion negatively correlated with population density and age structure of an endangered dune plant across its range. Biol Invasions (2021). https://doi.org/10.1007/s10530-021-02516-5 Categories: Data; Tags: Antioch Dunes, California, USGS Science Data Catalog (SDC), biota, coastal ecosystems, All tags... ecology, endangered species, invasive species, remote sensing, Fewer tags Pacific Northwest tidal marsh plant biomass from a 2017 greenhouse experiment with flooding and salinity manipulations The sensitivity of tidal marshes to environmental changes that result from sea-level rise or drought conditions is uncertain. We used a controlled greenhouse experiment and factorial flooding x salinity treatments to explore the differential responses of three tidal marsh plant species. Each species exhibited unique responses, with negative responses to increased salinity and longer flooding, but only limited evidence for interactive effects. These data support the following publication: Buffington, K.J., Goodman, A.C., Freeman, C.M. and Thorne, K.M., 2020. Testing the interactive effects of flooding and salinity on tidal marsh plant productivity. Aquatic Botany, p.103231. Categories: Data; Tags: Botany, Emergent Tidal Marsh, Pacific Northwest, USGS Science Data Catalog (SDC), biota, All tags... laboratory experiments, salinity, vascular plants, Fewer tags