Environmental DNA (eDNA) Metabarcoding Uncovers Fish Community Secrets and Climate Links in Northeastern Canada Rivers

February 14, 2024

eDNA metabarcoding reveals riverine fish community structure and climate associations in northeastern Canada.

Climate change is a major threat to northern freshwater ecosystems, but many remote areas lack biodiversity data.

Environmental DNA (eDNA) collection is easier than traditional methods and is being used more in hard-to-reach places.

This study used eDNA metabarcoding at 174 river sites in northeastern North America, including Newfoundland and Labrador, from 2019 to 2021. It identified 33 fish species, including three non-native ones and several new range expansions. Spatial and climate factors explained about 56% of the variation in fish communities.

Compared to historical data, eDNA detected more species on average.

This research is the most comprehensive survey of fish in Newfoundland and Labrador, revealing new species and offering insights for future eDNA use in northern rivers.

Link to publication
Contributors
Samantha E. Crowley
Paul Bentzen
Tony Kess
Steven J. Duffy
Amber M. Messmer
Beth Watson
J. Brian Dempson
Donald G. Keefe
Robert C. Perry
Benjamin Marquis
Mehrdad Hajibabaei
Nicole Fahner
Lesley Berghuis
Kerry Hobrecker
Ian R. Bradbury
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