Insights into global diatom distribution and diversity in the world’s ocean

Handle URI:
http://hdl.handle.net/10754/621469
Title:
Insights into global diatom distribution and diversity in the world’s ocean
Authors:
Malviya, Shruti; Scalco, Eleonora; Audic, Stéphane; Vincent, Flora; Veluchamy, Alaguraj; Poulain, Julie; Wincker, Patrick; Iudicone, Daniele; de Vargas, Colomban; Bittner, Lucie; Zingone, Adriana; Bowler, Chris
Abstract:
Diatoms (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.
KAUST Department:
Biological and Environmental Sciences and Engineering (BESE) Division; Center for Desert Agriculture
Citation:
Malviya 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.
Publisher:
Proceedings of the National Academy of Sciences
Journal:
Proceedings of the National Academy of Sciences
Issue Date:
1-Mar-2016
DOI:
10.1073/pnas.1509523113
PubMed ID:
27044109
PubMed Central ID:
PMC4843444
Type:
Article
ISSN:
0027-8424; 1091-6490
Additional Links:
http://www.pnas.org/content/113/16/4416
Appears in Collections:
Articles; Center for Desert Agriculture; Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorMalviya, Shrutien
dc.contributor.authorScalco, Eleonoraen
dc.contributor.authorAudic, Stéphaneen
dc.contributor.authorVincent, Floraen
dc.contributor.authorVeluchamy, Alagurajen
dc.contributor.authorPoulain, Julieen
dc.contributor.authorWincker, Patricken
dc.contributor.authorIudicone, Danieleen
dc.contributor.authorde Vargas, Colombanen
dc.contributor.authorBittner, Lucieen
dc.contributor.authorZingone, Adrianaen
dc.contributor.authorBowler, Chrisen
dc.date.accessioned2016-11-03T08:30:06Z-
dc.date.available2016-11-03T08:30:06Z-
dc.date.issued2016-03-01en
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.en
dc.identifier.issn0027-8424en
dc.identifier.issn1091-6490en
dc.identifier.pmid27044109en
dc.identifier.doi10.1073/pnas.1509523113en
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.en
dc.publisherProceedings of the National Academy of Sciencesen
dc.relation.urlhttp://www.pnas.org/content/113/16/4416en
dc.rightsFreely available online through the PNAS open access option.en
dc.subjectBiodiversityen
dc.subjectChoke pointsen
dc.subjectDiatomsen
dc.subjectMetabarcodingen
dc.subjectTara Oceansen
dc.titleInsights into global diatom distribution and diversity in the world’s oceanen
dc.typeArticleen
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.contributor.departmentCenter for Desert Agricultureen
dc.identifier.journalProceedings of the National Academy of Sciencesen
dc.identifier.pmcidPMC4843444en
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, Franceen
dc.contributor.institutionBiological Oceanography Division, National Institute of Oceanography, Dona Paula, Goa, Indiaen
dc.contributor.institutionStazione Zoologica Anton Dohrn, Naples, Italyen
dc.contributor.institutionCNRS, UMR 7144, Station Biologique de Roscoff, Roscoff, Franceen
dc.contributor.institutionInstitut de Génomique, GENOSCOPE, Commissariat À L'Énergie Atomique et Aux Énergies Alternatives, Évry, Franceen
dc.contributor.institutionUMR 8030, CNRS, CP5706, Évry, Franceen
dc.contributor.institutionUMR 8030, Université D'Evry, CP5706, Évry, Franceen
dc.contributor.institutionSorbonne Universités, Université Pierre et Marie Curie (UPMC), CNRS, Institut de Biologie Paris-Seine (IBPS), Evolution Paris Seine, Paris, Franceen
kaust.authorVeluchamy, Alagurajen

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