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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Cross-ocean patterns and processes in fish biodiversity on coral reefs through the lens of eDNA metabarcoding
AU - Mathon, Laetitia
AU - Marques, Virginie
AU - Mouillot, David
AU - Albouy, Camille
AU - Andrello, Marco
AU - Baletaud, Florian
AU - Borrero-Pérez, Giomar H.
AU - Dejean, Tony
AU - Edgar, Graham J.
AU - Grondin, Jonathan
AU - Guerin, Pierre-Edouard
AU - Hocdé, Régis
AU - Juhel, Jean-Baptiste
AU - Kadarusman, null
AU - Maire, Eva
AU - Mariani, Gael
AU - McLean, Matthew
AU - Polanco F., Andrea
AU - Pouyaud, Laurent
AU - Stuart-Smith, Rick D.
AU - Sugeha, Hagi Yulia
AU - Valentini, Alice
AU - Vigliola, Laurent
AU - Vimono, Indra B.
AU - Pellissier, Loïc
AU - Manel, Stéphanie
PY - 2022/4/27
Y1 - 2022/4/27
N2 - Increasing speed and magnitude of global change threaten the world's biodiversity and particularly coral reef fishes. A better understanding of large-scale patterns and processes on coral reefs is essential to prevent fish biodiversity decline but it requires new monitoring approaches. Here, we use environmental DNA metabarcoding to reconstruct well-known patterns of fish biodiversity on coral reefs and uncover hidden patterns on these highly diverse and threatened ecosystems. We analysed 226 environmental DNA (eDNA) seawater samples from 100 stations in five tropical regions (Caribbean, Central and Southwest Pacific, Coral Triangle and Western Indian Ocean) and compared those to 2047 underwater visual censuses from the Reef Life Survey in 1224 stations. Environmental DNA reveals a higher (16%) fish biodiversity, with 2650 taxa, and 25% more families than underwater visual surveys. By identifying more pelagic, reef-associated and crypto-benthic species, eDNA offers a fresh view on assembly rules across spatial scales. Nevertheless, the reef life survey identified more species than eDNA in 47 shared families, which can be due to incomplete sequence assignment, possibly combined with incomplete detection in the environment, for some species. Combining eDNA metabarcoding and extensive visual census offers novel insights on the spatial organization of the richest marine ecosystems.
AB - Increasing speed and magnitude of global change threaten the world's biodiversity and particularly coral reef fishes. A better understanding of large-scale patterns and processes on coral reefs is essential to prevent fish biodiversity decline but it requires new monitoring approaches. Here, we use environmental DNA metabarcoding to reconstruct well-known patterns of fish biodiversity on coral reefs and uncover hidden patterns on these highly diverse and threatened ecosystems. We analysed 226 environmental DNA (eDNA) seawater samples from 100 stations in five tropical regions (Caribbean, Central and Southwest Pacific, Coral Triangle and Western Indian Ocean) and compared those to 2047 underwater visual censuses from the Reef Life Survey in 1224 stations. Environmental DNA reveals a higher (16%) fish biodiversity, with 2650 taxa, and 25% more families than underwater visual surveys. By identifying more pelagic, reef-associated and crypto-benthic species, eDNA offers a fresh view on assembly rules across spatial scales. Nevertheless, the reef life survey identified more species than eDNA in 47 shared families, which can be due to incomplete sequence assignment, possibly combined with incomplete detection in the environment, for some species. Combining eDNA metabarcoding and extensive visual census offers novel insights on the spatial organization of the richest marine ecosystems.
KW - General Agricultural and Biological Sciences
KW - General Environmental Science
KW - General Immunology and Microbiology
KW - General Biochemistry, Genetics and Molecular Biology
KW - General Medicine
U2 - 10.1098/rspb.2022.0162
DO - 10.1098/rspb.2022.0162
M3 - Journal article
VL - 289
JO - Proceedings of the Royal Society B: Biological Sciences
JF - Proceedings of the Royal Society B: Biological Sciences
SN - 0962-8452
IS - 1973
M1 - 20220162
ER -