December 7, 2020 — One liter of ocean water can not only unlock the recent presence of dozens of species — it can also reveal the relative number of these fish.
According to the most extensive comparison of its kind, the relative abundance of DNA from different species found from ocean water samples taken off the coast of New Jersey correlates well with the data gathered by the more expensive and destructive technique of bottom trawling.
“It’s really going to be a game change for ocean science, with many applications,” said Mark Stoeckle, an environmental genetics researcher at Rockefeller University in New York City. He added that as DNA analysis becomes cheaper and more accurate, analyzing environmental DNA could be used for everything from tracking fluctuations in fish stocks due to fishing operations, to cataloguing the effects of climate change on species diversity and abundance.