Parent Layer: ESA Critical Habitat

Name: Loggerhead Sargassum

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Description: Critical habitat constitutes areas considered essential for the conservation of a listed species. These data identify, in general, the areas of Sargassum critical habitat for the Northwest Atlantic Ocean Distinct Population Segment of Loggerhead sea turtle (Caretta caretta), providing notice to the public and managers of the importance of the areas to the conservation of this species. Special protections and/or restrictions are possible in areas where Federal funding, permits, licenses, authorizations, or actions occur or are required. We describe the physical and biological features (PBF) of Sargassum habitat as developmental and foraging habitat for young loggerheads where surface waters form accumulations of floating material, especially Sargassum. Primary constituent elements (PCEs) that support this habitat are the following: (i) Convergence zones, surface-water downwelling areas, the margins of major boundary currents (Gulf Stream), and other locations where there are concentrated components of the Sargassum community in water temperatures suitable for the optimal growth of Sargassum and inhabitance of loggerheads; (ii) Sargassum in concentrations that support adequate prey abundance and cover; (iii) Available prey and other material associated with Sargassum habitat including, but not limited to, plants and cyanobacteria and animals native to the Sargassum community such as hydroids and copepods; and (iv) Sufficient water depth and proximity to available currents to ensure offshore transport (out of the surf zone), and foraging and cover requirements by Sargassum for post-hatchling loggerheads, i.e., >10 meters depth.

Copyright Text: National Oceanic and Atmospheric Administration (NOAA) Fisheries Service's Office of Protected Resources.

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