DNA sucked into air filters can reveal what plants and animals are nearby

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DNA sucked into air filters can reveal what plants and animals are nearby
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DNA is all around us — even in the air we breathe. Now scientists have found that air quality monitoring stations — which pull in air to test for pollution — also pick up lots of DNA that can reveal what plants and animals have been in the area.

in lakes and rivers. But it’s been harder to get a genetic picture of what’s roaming around on land, said Kristine Bohmann, who studies environmental DNA at the University of Copenhagen and was not involved with the latest study.

For this latest study, Clare and her team tested air filters from two monitoring stations, one in London and one in Scotland, which are part of a national network to test for pollution. The filters picked up on a wide range of wildlife, including grasses, fungi, deer, hedgehogs and songbirds — along with “the ubiquitous pigeon,” Littlefair said.

And it's an easy lift to use systems that are already in place, pointed out James Allerton, an air quality scientist at the UK’s National Physical Laboratory. Many countries have networks set up to monitor air quality, and some of them store their old filters for years or even decades — an archive that could help show how ecosystems have changed over time.

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