Estuarine fishes associated with intertidal oyster reefs characterized using environmental DNA and baited remote underwater video

Victoria J. Cole; David Harasti; Rose Lines; Michael Stat

doi:10.1002/edn3.190

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Estuarine fishes associated with intertidal oyster reefs characterized using environmental DNA and baited remote underwater video

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Estuarine fishes associated with intertidal oyster reefs characterized using environmental DNA and baited remote underwater video

Victoria J. Cole, David Harasti, Rose Lines and Michael Stat

Environmental DNA (Hoboken, N.J.), Vol.4(1), pp.50-62

01/2022

DOI: https://doi.org/10.1002/edn3.190

Appears in Recent Faculty of Science and Engineering Publications

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Abstract

biodiversity

BRUVs

eDNA

estuary

fishes

metabarcoding

oyster reefs

It has been widely shown that oyster reefs enhance local biodiversity and fisheries production. To determine the importance of intertidal remnant estuarine oyster reefs compared to unstructured sandy habitats over small spatial scales (<1 km) to fishes, assemblages were sampled with two nondestructive methods: baited underwater remote videos (BRUVs) and environmental DNA (eDNA) metabarcoding. Fish diversity from eDNA was characterized using three metabarcoding assays, and the assemblages differed with each, as well as to that detected by BRUVs. Overall, 112 fish genera were identified, with 78 more genera detected using eDNA metabarcoding than those observed with BRUVs. Both eDNA and BRUVs resolved a higher number of fish genera associated with oyster reefs than with sand sites, and a different fish composition between habitats was also resolved using each method. Furthermore, eDNA was shown to be useful toward characterizing the gamma diversity of the estuary, due to the intertidal nature and hydrodynamics of the system, as well as the alpha diversity associated with oyster reefs and sand sites. This study reinforces the importance of using multiple metabarcoding assays along-side BRUVs for sampling assemblages of fishes and demonstrates the utility of using both methods in studies of biodiversity and future management of intertidal estuarine systems.

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Title: Estuarine fishes associated with intertidal oyster reefs characterized using environmental DNA and baited remote underwater video
Creators: Victoria J. Cole - New South Wales Department of Primary Industries
David Harasti - New South Wales Department of Primary Industries
Rose Lines - Curtin University
Michael Stat - University of Newcastle Australia
Publication Details: Environmental DNA (Hoboken, N.J.), Vol.4(1), pp.50-62
Publisher: John Wiley & Sons, Inc.
Number of pages: 0
Grant note: NSW Marine Estate Management Strategy
Identifiers: 991013126111702368
Copyright: © 2021 Commonwealth of Australia. Environmental DNA published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, (https://creativecommons.org/licenses/by-nc/4.0/).
Academic Unit: Faculty of Science and Engineering
Language: English
Resource Type: Journal article

Estuarine fishes associated with intertidal oyster reefs characterized using environmental DNA and baited remote underwater video

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