Environmental DNA reveals tropical shark diversity in contrasting levels of anthropogenic impact

Sharks are charismatic predators that play a key role in most marine food webs. Their demonstrated vulnerability to exploitation has recently turned them into flagship species in ocean conservation. Yet, the assessment and monitoring of the distribution and abundance of such mobile species in marine...

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Vydáno v:	Scientific reports Ročník 7; číslo 1; s. 16886 - 11
Hlavní autoři:	Bakker, Judith, Wangensteen, Owen S., Chapman, Demian D., Boussarie, Germain, Buddo, Dayne, Guttridge, Tristan L., Hertler, Heidi, Mouillot, David, Vigliola, Laurent, Mariani, Stefano
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	London Nature Publishing Group UK 04.12.2017 Nature Publishing Group
Témata:	631/158/2452 704/158/672 Abundance Animal genetics Animals Anthropogenic factors Biodiversity Biodiversity and Ecology Caribbean Region Chemical analysis Conservation Conservation of Natural Resources Deoxyribonucleic acid DNA DNA Barcoding, Taxonomic - methods DNA, Ribosomal - chemistry DNA, Ribosomal - genetics DNA, Ribosomal - metabolism Ecosystem Ecosystems Elasmobranchii - classification Elasmobranchii - genetics Electron Transport Complex IV - genetics Environmental DNA Environmental Sciences Fishing Food webs Gene Library Genetics Humanities and Social Sciences Life Sciences Marine environment multidisciplinary Populations and Evolution Predators Principal components analysis Science Science (multidisciplinary) Seawater Seawater - chemistry Sequence Analysis, DNA Sharks Species Taxonomy Water analysis Water sampling Caribbean Region conservation ecosystem management coral-reef fisheries wilderness fish communities rays populations collapse aquatic biodiversity
ISSN:	2045-2322, 2045-2322
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Shrnutí:	Sharks are charismatic predators that play a key role in most marine food webs. Their demonstrated vulnerability to exploitation has recently turned them into flagship species in ocean conservation. Yet, the assessment and monitoring of the distribution and abundance of such mobile species in marine environments remain challenging, often invasive and resource-intensive. Here we pilot a novel, rapid and non-invasive environmental DNA (eDNA) metabarcoding approach specifically targeted to infer shark presence, diversity and eDNA read abundance in tropical habitats. We identified at least 21 shark species, from both Caribbean and Pacific Coral Sea water samples, whose geographical patterns of diversity and read abundance coincide with geographical differences in levels of anthropogenic pressure and conservation effort. We demonstrate that eDNA metabarcoding can be effectively employed to study shark diversity. Further developments in this field have the potential to drastically enhance our ability to assess and monitor elusive oceanic predators, and lead to improved conservation strategies.
Bibliografie:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 content type line 23 PMCID: PMC5715122
ISSN:	2045-2322 2045-2322
DOI:	10.1038/s41598-017-17150-2