Dams are being removed more and more because of the fact that it is helping the ecosystem function. There was an experiment done around twenty-two small dams in Alabama to observe the life of Mollusks. Sites that are up and down stream from dams did not have that many differences in their habitat. Streams that had intact dams had a higher mussel catch rate and there was higher taxon richness than the small streams that didn't have dams.
The mollusks found in the streams were Deposit-feeding Snails, Exotic Bivalve, and the Fingernail Clams. They think that if dams are intact it enhances mollusk habitats in down stream reaches. Streams that have intact dams are proven to be more stable than ones that are not. Streams that have dams that are not intact are not as clean and can have parts of construction from the dam when it was taken down. The dams that are not intact need to be fixed because they can harm the Mollusks and hurt them in time to come if we don't do anything about it.
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