• Benthic Habitat

    Metadata Updated: March 22, 2021

    This data product was created as part of the Northwest Atlantic Marine Ecoregional Assessment. The Nature Conservancy developed this science-based ecoregional assessment for the Northwest Atlantic Marine region (Bay of Fundy to Cape Hatteras, North Carolina). This assessment synthesizes information on oceanography, chemistry, geology, biology, and social science to inform decisions about coastal and marine ecosystems. By integrating this information at a regional level, the Conservancy is able to provide both a greater understanding of the interrelated biological diversity of the marine ecoregion, and a clearer picture of the current condition of its natural areas and the challenges to their continued persistence. The ten categories of targets identified as the primary structure for the marine ecoregional assessment are: coastal and estuarine habitats, benthic habitats, diadromous fish, demersal fish, pelagic fish, forage fish, nearshore shellfish, shorebirds and seabirds, marine mammals, and sea turtles. For more information and a detailed report, please visit http://nature.org/namera/.  

    Benthic habitats are combinations of Ecological Marine Units (EMUs) considered with their species assemblages. The signature of a benthic habitat type may be a combination of multiple EMUs. Thresholds were created by classifying grab samples into organism groups based on similarities in the composition and abundance of the benthic species using hierarchical cluster analysis. To perform this analysis, each grab sample was classified to an organism group, then overlaid on standardized base maps of depth, sediment grain size and seabed forms, and attributed with the information taken from the classified data. Regression trees were built individually for each physical variable to identify critical thresholds that separated sets of organism groups from each other. Regression trees were also built using all variables collectively to identify which variables were driving the organism differences. Each analysis was performed separately by ecological subregion after data exploration revealed that the relationships between genera and physical factors differed markedly among subregions.   The download for this data includes: Benthic Habitat, Bathymetry, Benthic Sediment, Seabed Forms, Ecological Marine Units, and Ecoregion Boundaries.

    Access & Use Information

    License: No license information was provided.

    Downloads & Resources


    Metadata Date February 13, 2018
    Metadata Created Date March 22, 2021
    Metadata Updated Date March 22, 2021
    Reference Date(s) 2018-02-13T21:04:36+00:00 (creation), 2018-02-13T21:04:36+00:00 (lastUpdate), January 1, 2010 (publication)
    Frequency Of Update

    Metadata Source

    Harvested from North Atlantic LCC Products Harvest Source

    Additional Metadata

    Resource Type Dataset
    Metadata Date February 13, 2018
    Metadata Created Date March 22, 2021
    Metadata Updated Date March 22, 2021
    Reference Date(s) 2018-02-13T21:04:36+00:00 (creation), 2018-02-13T21:04:36+00:00 (lastUpdate), January 1, 2010 (publication)
    Responsible Party (Point of Contact); North Atlantic Landscape Conservation Cooperative (Point of Contact)
    Contact Email
    Guid 5a8352e4e4b00f54eb3298cc
    Access Constraints The Nature Conservancy (TNC) compiled this data set from publicly available data sources and this data is freely distributable without permission from this TNC resource office. This data set must be cited on all electronic and hard copy products using the language of the Data Set Credit. Use and analysis of the geographic data are limited by the scale at which the data was collected and mapped, and that, as a regional analysis, it is not intended for site level decisions. The Nature Conservancy shall not be held liable for improper or incorrect use of the data described and/or contained herein. Any sale, distribution, loan, or offering for use of these digital data, in whole or in part, is prohibited without the approval of the Nature Conservancy. The use of these data to produce other GIS products and services with the intent to sell for a profit is prohibited without the written consent of the Nature Conservancy. All parties receiving these data must be informed of these restrictions. The Nature Conservancy shall be acknowledged as data contributors to any reports or other products derived from these data.
    Coupled Resource
    Frequency Of Update
    Harvest Object Id f76a2145-ac59-4105-9eee-b7ad37e54ff4
    Harvest Source Id da85c4a5-d56f-49e7-be63-1de38f8ee2d3
    Harvest Source Title North Atlantic LCC Products Harvest Source
    Metadata Language eng; USA
    Metadata Type geospatial
    Progress completed
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True

    Didn't find what you're looking for? Suggest a dataset here.