Most nerite marine species are quite common on open shores. However, freshwater and terrestrial species are often more restricted in their distribution and more susceptible to disturbance; this is certainly the case in the Neritopsina. Ten freshwater members of the Neritidae and 23 terrestrial snails (17 Helicinidae and six Hydrocenidae) are listed on the IUCN Red List. Habitat destruction is the largest threat to these species, with deforestation directly affecting terrestrial species and increased sedimentation load impacting freshwater species. Freshwater species are also affected by water diversion and reservoir projects, as well as pollution.
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