UNESCO launches DNA sampling drive to map marine biodiversity worldwide

UNESCO has initiated the ADNe Expeditions program, targeting the collection of 3,000 seawater samples by 2028 to create a comprehensive map of marine biodiversity through environmental DNA analysis. The effort builds on previous missions, for example at Aldabra Atoll in the Seychelles, where a handful of litres yielded records of 800 species, including 13 shark and ray types. Samples will be sourced by local communities and scientists in hard-to-reach areas such as the French Southern and Antarctic Lands, the Arctic Ocean, and the icy fjord of Ilulissat in Greenland.

Researchers aim to detect early invasions, establish baseline data, and locate cryptic or endangered organisms, while also monitoring species moving into new habitats as temperatures rise. UNESCO’s marine heritage program notes that local fishers have already observed unexpected fish and whale sightings, underscoring the value of eDNA for rapid ecosystem assessment.