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Are Freshwater Polls Affecting Alabama's Biodiversity Of Life?

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Freshwater invertebrates make up a vast amount of Alabama’s Biodiversity. Biodiversity is the variability among living organisms from all sources, including terrestrial, marine, and other aquatic ecosystems. Mollusca which are also known as snails are one the most commonly encountered in Alabama. They spend the majority of their life in an aquatic ecosystem. As a matter of fact, Their are 180 different species of Mollusca in Alabama.There are unique species associated with every type of aquatic habitat from the Canadian Arctic to the Everglades of Florida. Mollusca are highly valued because they are either a food source or biological indicators for a healthy habitat.They prove immensely beneficial both economically and medicinally. Alabama …show more content…

Unfortunately, freshwater snails like many other river species across North America are threatened. The abundance and variety of snails have dramatically declined over the last 80 years, especially those species that inhabit streams and rivers. Approximately 60 species of freshwater snails are presumed extinct, 20 are on the federal endangered or threatened species list, and another 290 species are of conservation concern nationwide. The decline of freshwater snails began in the early twentieth century. Dam construction and other channel modifications, siltation, and industrial and agricultural pollution have all degraded the river habitats on which most species depend. As a result, the species richness and the abundance of freshwater snails have declined dramatically. This decline has been especially pronounced in the Southeastern United States where these animals are most diverse. The continued loss and decline of freshwater snails and other river species are testament to the fact that despite significant water-quality improvements made in the last 25 years, much work remains if we are to halt species

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