UK Nature and Environment

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How DNA analysis of our rivers and lakes can reveal new secrets about their biodiversity (theconversation.com)

submitted 7 months ago by [email protected] to c/[email protected]

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Freshwater ecosystems are the lifeblood of the natural world, yet they are facing a silent crisis. A 2022 report by the World Wildlife Fund revealed a staggering 83% decline in global freshwater vertebrate populations since 1970, a rate far exceeding that of any other habitat.

The level of degradation to nature is alarming, but ecosystems are complicated, as are the effects of human activity. So, the story is often more nuanced.

Our research shows how analysing environmental DNA (eDNA) – the DNA left behind by organisms in life and death – could unlock the secrets hidden within freshwater streams, rivers and lakes. This offers hope for a more efficient monitoring of these vital ecosystems.

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