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Seawater preserves "memories"
in the form of DNA from recently passed fish and invertebrates.
This information, known as environmental DNA or eDNA, can be used by scientists to track species
in space.
Professor Jennifer Sunday of McGill University and her colleagues at the eDNA Coast Observatory (PECO) in the Pacific are using this new method to track "biogeography" just as we predict the weather
.
The PECO network has been collecting seawater in bottles from Juneau, Alaska, to San Diego, California, to find out which fish live where and how those fish have changed over time, focusing on seagrass habitat
in this large coastal area.
Armed with this information, researchers will investigate the geographic distribution of hundreds of fish species and better understand how different species live together in different environments — as potential consumers, competitors and invasive species — all from bottled water
.
"Networks like PECO could mark the beginning
of a new frontier in tracking underwater biodiversity.
" Such groups are forming all over the world," said
Sunday, an assistant professor in the Department of Biology.
