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Related Experiment Video

Updated: Jan 18, 2026

The Floating Lab: Standard Operational Procedure for Collecting and Filtering Seawater Samples from Operating Ferries for Environmental DNA Analysis
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Expanding Monitoring Capacity for Potential Invasive Species in Arctic Canada With Environmental DNA Metabarcoding.

Elizabeth Boyse1, Melody S Clark1, Ian M Carr2

  • 1British Antarctic Survey, Cambridge, UK.

Global Change Biology
|September 8, 2025
PubMed
Summary
This summary is machine-generated.

Environmental DNA (eDNA) surveys detected the invasive bay barnacle in Arctic Canada, highlighting the need for monitoring as climate change and increased shipping create new risks for non-indigenous species.

Keywords:
Arcticclimate changeenvironmental DNAhuman impactsinvasive speciesmetabarcodingmonitoringshipping traffic

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Area of Science:

  • Marine biology
  • Environmental science
  • Genomics

Background:

  • Arctic Canada's historically isolated environment has limited non-indigenous species establishment.
  • Climate change and increased shipping traffic (over 250% since 1990) are facilitating species introductions.
  • Incomplete Arctic biota inventories hinder the identification of new or invasive species.

Purpose of the Study:

  • To assess eukaryotic community composition and detect potential invasive species in Arctic Canada using environmental DNA (eDNA) metabarcoding.
  • To investigate biodiversity along the Northwest Passage, a major shipping route, targeting areas frequented by passenger vessels.
  • To validate eDNA metabarcoding as a tool for biodiversity surveillance in data-poor regions.

Main Methods:

  • Collected triplicate 1-liter seawater samples from 27 locations in the Northwest Passage.
  • Utilized environmental DNA (eDNA) metabarcoding targeting the 18S rRNA V9 and COI regions.
  • Analyzed eukaryotic community composition and identified Amplicon Sequence Variants (ASVs).

Main Results:

  • Detected 126 COI ASVs and 391 18S ASVs, providing a snapshot of eukaryotic community composition.
  • Confirmed copepods, dinoflagellates, and diatoms as dominant groups, aligning with previous net sampler surveys.
  • Reported the first detection of the invasive bay barnacle (Amphibalanus improvisus) in Arctic Canada.

Conclusions:

  • Environmental DNA (eDNA) is effective for detecting non-indigenous species in under-sampled Arctic regions.
  • The detection of Amphibalanus improvisus signals a potential new invasion, requiring further investigation into its reproductive status.
  • Integrating eDNA with citizen science and local knowledge can create a robust monitoring system for Arctic invasives in a changing environment.