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An environmental DNA approach to informing restoration of the functionally extinct oyster, Ostrea angasi

  • Alexander Coutts
  • , Allyson O'Brien
  • , Andrew R. Weeks
  • , Stephen E. Swearer
  • , Anthony van Rooyen
  • , Simon Branigan
  • , Rebecca L Morris

Research output: Contribution to journalArticlepeer-review

Abstract

The success of oyster reef restoration can be enhanced by data on the distribution of remnant populations to inform the selection of suitable restoration locations. A quantitative polymerase chain reaction-based environmental DNA (eDNA) assay was designed to provide distribution data for the oyster, Ostrea angasi, whose reefs are functionally extinct in Port Phillip Bay, Australia. Ostrea angasi eDNA accumulation and decay was measured in aquaria containing oysters in low and high densities, prior to testing the efficacy of the eDNA approach for detection of oysters at 15 field sites. Ostrea angasi eDNA accumulated significantly faster in aquaria where more individuals were present, while eDNA became undetectable 2–6 days after oysters were removed in low-density treatments. The eDNA samples were successful at detecting O. angasi in the field when taken in close proximity of an oyster population. Increasing the sample number and volume could maximize oyster detection, demonstrating the potential of eDNA to identify suitable sites for the restoration of functionally extinct marine ecosystems.

Original languageEnglish
Pages (from-to)1732-1744
Number of pages13
JournalAquatic Conservation: Marine and Freshwater Ecosystems
Volume32
Issue number11
DOIs
Publication statusPublished - Nov 2022
Externally publishedYes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

  1. SDG 6 - Clean Water and Sanitation
    SDG 6 Clean Water and Sanitation
  2. SDG 14 - Life Below Water
    SDG 14 Life Below Water
  3. SDG 15 - Life on Land
    SDG 15 Life on Land

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