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In the marine environment, existing global classification systems remain limited in their spatial resolution. 2003, Hazen and Anthamatten 2004, Hoekstra et al. ) in broadscale conservation, however, has largely been restricted to terrestrial studies ( Chape et al. The use of such systems (notably, the widely cited system developed by Olson et al. Mapped classifications of patterns in biodiversity have long been an important tool in fields from evolutionary studies to conservation planning ( Forbes 1856, Wallace 1876, Spellerberg and Sawyer 1999, Lourie and Vincent 2004). Recchia is marine program director at the Wildlife Conservation Society, New York, NY 10461. Edmund McManus is a senior program officer in the UNEP (United Nations Environment Programme) World Conservation Monitoring Centre, Cambridge CB3 0DL, United Kingdom. Martin was a marine program officer with IUCN (World Conservation Union) when this article was prepared and is currently working as a freelance consultant for the Census of Marine Life Initiative, 1205 Geneva, Switzerland. Lourie is a research associate at the Redpath Museum, McGill University, Montreal, Quebec H3A 2K6, Canada. Jorge is deputy director of WWF International's Global Marine Programme, CH-1196 Gland, Switzerland. Halpern is project coordinator for ecosystem-based management of coastal marine systems at the National Center for Ecological Analysis and Synthesis, Santa Barbara, CA 93101. Max Finlayson is a member and former chair of Ramsar's Scientific and Technical Review Panel and principal researcher in wetland ecology at the International Water Management Institute, Colombo, Sri Lanka. Nick Davidson is the deputy secretary general of the Ramsar Convention Secretariat, CH-1196 Gland, Switzerland. Allen is a research associate at the Western Australian Museum, Perth, Western Australia 6986, Australia. Fox and Al Lombana are marine biologists in the Conservation Science Program, World Wildlife Fund–US, Washington, DC 20037. Ferdaña, Jennifer Molnar, and James Robertson are conservation scientists in The Nature Conservancy's Conservation Strategies Group, Arlington, VA 22203.
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