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What the area of influence of the INLD?

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The INLD classifies Earth drylands according to the concept provided by the Millennium Ecosystem Assessment (2005). 

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Drylands are limited by soil moisture resulting from low rainfall and high evaporation rates. Besides, drylands show a gradient of increasing primary productivity, ranging from:

•Hyper-arid (<25mm),

•Arid (<25-250mm),

•Semiarid (<250-500mm),

•Dry subhumid (<500-750mm)

 (Willians 2000; Safriel and Adeel, 2005)

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Study sites of INLD (UNEP-WCMC, 2007).

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