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Abstract
Accurate seafloor maps serve as a critical component for understanding marine ecosystems and guiding informed ocean management decisions. From 2004 to 2015, the Atlantic Ocean continental margin offshore of the United States has been systematically mapped using multibeam sonars. This work was done in support of the U.S. Extended Continental Shelf (ECS) Project and for baseline characterization of the Atlantic canyons, but the question remains as to the relevance of these margin-wide data sets for conservation and management decisions pertaining to these areas. This study utilized an automatic segmentation approach to initially identify landform features from the bathymetry of the region, then translated these results into complete coverage geomorphology maps of the region utilizing the coastal and marine ecological classification standard (CMECS) to define geoforms. Abyssal flats make up more than half of the area (53%), with the continental slope flat class making up another 30% of the total area. Flats of any geoform class (including continental shelf flats and guyot flats) make up 83.06% of the study area. Slopes of any geoform class make up a cumulative total of 13.26% of the study region (8.27% abyssal slopes, 3.73% continental slopes, and 1.25% seamount slopes). While ridge features comprise only 1.82% of the total study area (1.03% abyssal ridges, 0.63 continental slope ridge, and 0.16% seamount ridges). Key benefits of the study’s semi-automated approach include computational efficiency for large datasets, and the ability to apply the same methods to large regions with consistent results.
Publication Date
1-28-2020
Journal Title
Frontiers in Marine Science
Rights
© 2020 Sowers, Masetti, Mayer, Johnson, Gardner and Armstrong.
Publisher
Frontiers
Digital Object Identifier (DOI)
Document Type
Article
Recommended Citation
Sowers DC, Masetti G, Mayer LA, Johnson P, Gardner JV and Armstrong AA (2020) Standardized Geomorphic Classification of Seafloor Within the United States Atlantic Canyons and Continental Margin. Front. Mar. Sci. 7:9. doi: 10.3389/fmars.2020.00009
Comments
This is an open access article published by Frontiers in Frontiers in Marine Science in 2020, available online: https://dx.doi.org/10.3389/fmars.2020.00009