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Freshwater ecoregion:
Helmand-Sistan
(Palearctic)
(ecological region)
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Classification by:
Abell et al. (2008) Freshwater Ecoregions of the World: A New Map of Biogeographic Units for Freshwater Biodiversity Conservation
Systema Naturae 2000
freshwater ecoregions
Southern Asia
(Freshwater ecoregion)
Helmand-Sistan
(Palearctic)
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Last updated:
28 Aug 2026