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dc.contributor.authorMalviya, Shruti
dc.contributor.authorScalco, Eleonora
dc.contributor.authorAudic, Stéphane
dc.contributor.authorVincent, Flora
dc.contributor.authorVeluchamy, Alaguraj
dc.contributor.authorPoulain, Julie
dc.contributor.authorWincker, Patrick
dc.contributor.authorIudicone, Daniele
dc.contributor.authorde Vargas, Colomban
dc.contributor.authorBittner, Lucie
dc.contributor.authorZingone, Adriana
dc.contributor.authorBowler, Chris
dc.date.accessioned2016-11-03T08:30:06Z
dc.date.available2016-11-03T08:30:06Z
dc.date.issued2016-02-29
dc.identifier.citationMalviya S, Scalco E, Audic S, Vincent F, Veluchamy A, et al. (2016) Insights into global diatom distribution and diversity in the world’s ocean. Proc Natl Acad Sci USA 113: E1516–E1525. Available: http://dx.doi.org/10.1073/pnas.1509523113.
dc.identifier.issn0027-8424
dc.identifier.issn1091-6490
dc.identifier.pmid27044109
dc.identifier.doi10.1073/pnas.1509523113
dc.identifier.urihttp://hdl.handle.net/10754/621469
dc.description.abstractDiatoms (Bacillariophyta) constitute one of the most diverse and ecologically important groups of phytoplankton. They are considered to be particularly important in nutrient-rich coastal ecosystems and at high latitudes, but considerably less so in the oligotrophic open ocean. The Tara Oceans circumnavigation collected samples from a wide range of oceanic regions using a standardized sampling procedure. Here, a total of ∼12 million diatom V9-18S ribosomal DNA (rDNA) ribotypes, derived from 293 sizefractionated plankton communities collected at 46 sampling sites across the global ocean euphotic zone, have been analyzed to explore diatom global diversity and community composition. We provide a new estimate of diversity of marine planktonic diatoms at 4,748 operational taxonomic units (OTUs). Based on the total assigned ribotypes, Chaetoceros was the most abundant and diverse genus, followed by Fragilariopsis, Thalassiosira, and Corethron. We found only a few cosmopolitan ribotypes displaying an even distribution across stations and high abundance, many of which could not be assigned with confidence to any known genus. Three distinct communities from South Pacific, Mediterranean, and Southern Ocean waters were identified that share a substantial percentage of ribotypes within them. Sudden drops in diversity were observed at Cape Agulhas, which separates the Indian and Atlantic Oceans, and across the Drake Passage between the Atlantic and Southern Oceans, indicating the importance of these ocean circulation choke points in constraining diatom distribution and diversity. We also observed high diatom diversity in the open ocean, suggesting that diatoms may be more relevant in these oceanic systems than generally considered.
dc.publisherProceedings of the National Academy of Sciences
dc.relation.urlhttp://www.pnas.org/content/113/16/4416
dc.rightsFreely available online through the PNAS open access option.
dc.subjectBiodiversity
dc.subjectChoke points
dc.subjectDiatoms
dc.subjectMetabarcoding
dc.subjectTara Oceans
dc.titleInsights into global diatom distribution and diversity in the world’s ocean
dc.typeArticle
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.contributor.departmentDesert Agriculture Initiative
dc.identifier.journalProceedings of the National Academy of Sciences
dc.identifier.pmcidPMC4843444
dc.contributor.institutionInstitut de Biologie de L'École Normale Supérieure, École Normale Supérieure, Paris Sciences et Lettres Research University, CNRS UMR 8197, INSERM U1024, Paris, France
dc.contributor.institutionBiological Oceanography Division, National Institute of Oceanography, Dona Paula, Goa, India
dc.contributor.institutionStazione Zoologica Anton Dohrn, Naples, Italy
dc.contributor.institutionCNRS, UMR 7144, Station Biologique de Roscoff, Roscoff, France
dc.contributor.institutionInstitut de Génomique, GENOSCOPE, Commissariat À L'Énergie Atomique et Aux Énergies Alternatives, Évry, France
dc.contributor.institutionUMR 8030, CNRS, CP5706, Évry, France
dc.contributor.institutionUMR 8030, Université D'Evry, CP5706, Évry, France
dc.contributor.institutionSorbonne Universités, Université Pierre et Marie Curie (UPMC), CNRS, Institut de Biologie Paris-Seine (IBPS), Evolution Paris Seine, Paris, France
kaust.personVeluchamy, Alaguraj
dc.date.published-online2016-02-29
dc.date.published-print2016-03-15


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