Valvata virens
Photo: Wikimedia Commons (CC) via https://en.wikipedia.org/wiki/Valvata_virens
Overview
A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.
Valvata virens faces severe population declines primarily due to water pollution and eutrophication of its freshwater habitats, which degrade water quality and alter the delicate chemical balance required for this gastropod's survival. Agricultural runoff containing fertilizers and pesticides poses a particularly acute threat, as these chemicals can directly poison the snails or eliminate their food sources. Habitat modification through dam construction and water extraction further fragments populations and alters the natural flow regimes essential for maintaining suitable breeding conditions.
Habitat
Valvata virens inhabits clean, well-oxygenated freshwater environments including springs, streams, and the shallow margins of lakes with sandy or muddy substrates. This aquatic gastropod requires stable water chemistry and moderate flow rates, typically found in calcium-rich waters that support shell development.
Other threatened species in VALVATIDAE
Threatened in Canada
Frequently asked questions
Why is Valvata virens classified as Vulnerable?
Where does Valvata virens live?
What are the main threats to Valvata virens?
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