Salt Marsh Abundance by Marine Ecoregion

Nov 15, 2011 (Last modified Jan 13, 2016)
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Relative abundance of salt marsh habitat, by marine ecoregion.

We compiled a global database on salt marshes in collaboration with UNEP-WCMC and with input from Paul Adam, University of New South Wales, Australia. In this database, habitat abundance was estimated using the array of point locations and GIS data holdings from this database and were broadly based on abundance as a proportion of the total coastline length in each ecoregion. Salt marshes were poorly covered in the literature for some parts of the Arctic coastline and from wide areas of the tropics where salt marshes were often overlooked or classified within mangrove areas. While efforts were made to target data searching for these regions, there may still be some underestimation.

These data were derived by The Nature Conservancy and UNEP World Conservation Monitoring Centre, and were displayed in a map published in The Atlas of Global Conservation (Hoekstra et al., University of California Press, 2010). More information at
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UNEP World Conservation Monitoring Centre
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Hoekstra, J. M., J. L. Molnar, M. Jennings, C. Revenga, M. D. Spalding, T. M. Boucher, J. C. Robertson, T. J. Heibel, with K. Ellison. 2010. The Atlas of Global Conservation: Changes, Challenges, and Opportunities to Make a Difference. Ed. J. L. Molnar. Berkeley: University of California Press.

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GIS staff with The Nature Conservancy

This is a shared account for TNC staff to use to upload spatial data, to avoid the problem of data being "orphaned" when an individual leaves TNC.