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Name: VLIZ - Longhurst Biogeographical Provinces 2010

Display Field: provcode

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Description: <div>The dataset represents the division of the world oceans into provinces as defined by Longhurst (1995; 1998; 2006). The division has been based on the prevailing role of physical forcing as a regulator of phytoplankton distribution. The dataset contains the initial static boundaries developed at the Bedford Institute of Oceanography, Canada. Note that the boundaries of these provinces are not fixed in time and space, but are dynamic and move under seasonal and interannual changes in physical forcing. At the first level of reduction, Longhurst recognised four principal biomes: the Polar biome, the Westerlies biome, the Trade winds biome, and the Coastal biome. These four biomes are recognised in every major ocean basin. At the next level of reduction, the ocean basins are divided into provinces, roughly ten for each basin. These regions provide a template for data analysis or for making parameter assignments on a global scale. Please refer to Longhurst's publications when using these shapefiles.<br /></div><div><span style=''><br /></span></div><div><span style=''>A summary table has been prepared by Mathias Taeger and David Lazarus, </span><a href='http://www.vliz.be/en/imis?module=institute&amp;insid=5838' target='_blank'><span style=''>Museum für Naturkunde, Berlin</span></a><span style=''> (2010-03-26). This table makes it easier to relate the classification of Longhurst to the original quantitative parameters used to create it. Productivity values are from the table in Longhurst, 1995, Chlorophyll values; photic depth and mixed layer depth originate from graphs in Longhurst, 1998. The sea temperature at 0 and 50 m are from the World Ocean Atlas (2005), average values were calculated in ArcGIS. Each parameter value was set into 5 equal intervals.</span><a><span style=''></span></a><span style=''></span><br /><br /></div><div><br /></div><div><span style='font-weight:bold;'><span style=''>References:</span><span style=''><br /></span></span></div><ul><li>Longhurst, A.R et al. (1995). An estimate of global primary <br />production in the ocean from satellite radiometer data. J. Plankton Res.<br /> 17, 1245-1271 </li><li>Longhurst, A.R. (1995). Seasonal cycles of pelagic production and consumption. Prog. Oceanogr. 36, 77-167</li><li>Longhurst, A.R. (1998). Ecological Geography of the Sea. Academic Press, San Diego. 397p. (<a href='http://www.vliz.be/en/imis?module=ref&amp;refid=11061' target='_blank'>IMIS</a>)</li><li>Longhurst, A.R. (2006). Ecological Geography of the Sea. 2nd Edition. Academic Press, San Diego, 560p.</li></ul>

Copyright Text: Flanders Marine Institute (2009). Longhurst Provinces. Available online at https://www.marineregions.org/. Consulted on [YYYY-MM-DD]

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• Name: VLIZ - Longhurst Biogeographical Provinces 2010
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