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Tidal Marsh Vegetation and Elevation Data


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Karen Thorne, USGS Western Ecological Research Center , Research Ecologist, 20150501, Tidal Marsh Soil Surveys, Radiocarbon and 137 Cs data: .


All of these files are Access Databases that contain RTK elevation survey data and the corresponding vegetation surveys that were conducted concurrently. Over 2,000 intertidal plots were sampled for plant cover, frequency of occurrence, and species richness across the six study sites. Approximately 57 vascular plant species were found in the study, including grasses, rushes, forbs and sedges. Vegetated marsh ranged in elevation from approximately local mean tide level (MTL) to the marsh-upland transition zone (upland plots, defined as areas estimated to flood 1 time per year on average, were not considered for further analysis). We assessed vegetation cover and species richness concurrently with elevation surveys at approximately 25% [...]


Attached Files

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1 Humboldt Vegetation and Elevation Data.accdb 4.5 MB application/x-msaccess
2 Bolinas Vegetation and Elevation Data.accdb 8.82 MB application/x-msaccess
3 Morro Bay Vegetation and Elevation Data.accdb 3.33 MB application/x-msaccess
4 Newport Vegetation and Elevation Data.accdb 11.88 MB application/x-msaccess
5 Pt Mugu Vegetation and Elevation Data.accdb 3.62 MB application/x-msaccess
6 Tijuana Vegetation and Elevation Data.accdb 7.62 MB application/x-msaccess
Vegetation_Metadata.docx 87.64 KB application/vnd.openxmlformats-officedocument.wordprocessingml.document


At the state level, California has highlighted coastal ecosystems as important areas susceptible to climate change and have prioritized research to assist in adaptation planning for resource management and ecosystem services. The information emerging from our CERCC network will provide local managers and decision makers with the information they need to address endangered and threatened species management, wetland conservation, anadromous fish and migratory bird management and habitat conservation and recovery plans while making informed decisions on habitat resiliency and land acquisition planning that effectively considers the effects of climate change. Our CERCC network is a research model that can be potentially transferred to other coastal regions throughout the US. The overarching goal of our research was to use site-specific data to develop local and regionally-applicable climate change models that inform management of tidal wetlands along the Pacific Northwest coast. Our overarching questions were: (1) how do tidal marsh site characteristics vary across estuaries, and (2) does tidal marsh susceptibility to SLR vary along a latitudinal gradient and between estuaries? We addressed these questions with three specific objectives: (1) measure topographical and ecological characteristics (e.g., elevation, tidal range, vegetation composition) for tidal marsh and intertidal mudflats, (2) model SLR vulnerability of these habitats, and (3) examine spatial variability of these projected changes along the latitudinal gradient of the California coast.

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