As the UK’s Big Butterfly Count reaches more than 100,000 submissions, an international group of scientists have produced the first national survey of biodiversity using an entirely different approach. Instead of looking for species by eye, they took advantage of the samplers around the UK that constantly measure toxic metal particles in the air, and used them to measure tiny fragments of DNA.
Dr Joanne Littlefair from University College London, part of the research team, said: “Organisms lose bits of themselves all the time – dead skin cells, fragments of hair or feathers, saliva, even faeces and urine. Some of this will blow up into the air and become airborne ‘environmental’ DNA or eDNA.”
