and westerlies), abyssal, and hadal (ocean trench). Briggs Coastal Provinces One of the most comprehensive early classifications was the system of 53 coastal provinces developed by Briggs in 1974. The near-global system of 64 large marine ecosystems has a partial biogeographic basis. WWF Global 200 The World Wildlife Fund—WWF identified 43 priority marine ecoregions, as part of its Global 200 initiative. See also List of marine ecoregions Marine botany Marine ecosystem References External links Nature.org: Marine Ecoregions of the World—MEOW Aquatic ecology Marine biology Fisheries science Marine botany Oceanographical terminology