Threats to environmentally sensitive areas from peri-urban expansion in Mauritius
Other Publication ResearchOnline@JCUAbstract
There are 60 inhabited tropical island countries covering c. 3.54 million km2 of land. Tropical islands are disproportionately rich in endemic plants, birds, molluscs, and other invertebrates (Whittaker and Fernandez-Palacios 2007) relative to similar mainland habitats (see, for example, Kier et al. 2009). The majority of global coral and seagrass diversity is located in the reefs, shoals, and lagoons of tropical islands (Spalding et al. 2001, 1997), the islands accounting for 2.4% of the global land area, but housing a much greater swathe of the Earth's biological uniqueness (Kreft et al. 2008). At the same time, the topography of most tropical islands is relatively steep, compressing their high terrestrial and coastal marine biological value into relatively small areas. This compression also reduces the average size of watersheds and shortens river main stems, in particular relative to the hydrological space of continental systems (Milliman et al. 1999). Consequently, island nations rely heavily on groundwater extraction and river impoundments to provide clean water to urban areas, particularly during periods of low rainfall.
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Development and Sustainable Growth of Mauritius
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ISBN/ISSN
978-3-319-96165-1
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Pages Count
25
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Publisher
Palgrave Macmillan
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Publisher Location
Cham, Switzerland
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DOI
10.1007%2F978-3-319-96166-8_9