A pivotal role for ocean eddies in the distribution of microbial communities across the Antarctic Circumpolar Current
Mesoscale variability and associated eddy fluxes play crucial roles in ocean circulation dynamics and the ecology of the upper ocean. In doing so, these features are biologically important, providing a mechanism for the mixing and exchange of nutrients and biota within the ocean. Transient mesoscale...
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| Veröffentlicht in: | PloS one 2017-08, Vol.12 (8), p.e0183400-e0183400 |
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| creator | Venkatachalam, Siddarthan Ansorge, Isabelle J Mendes, Adriano Melato, Lebohang I Matcher, Gwynneth F Dorrington, Rosemary A |
| description | Mesoscale variability and associated eddy fluxes play crucial roles in ocean circulation dynamics and the ecology of the upper ocean. In doing so, these features are biologically important, providing a mechanism for the mixing and exchange of nutrients and biota within the ocean. Transient mesoscale eddies in the Southern Ocean are known to relocate zooplankton communities across the Antarctic Circumpolar Current (ACC) and are important foraging grounds for marine top predators. In this study we investigated the role of cyclonic and anti-cyclonic eddies formed at the South-West Indian Ridge on the spatial variability and diversity of microbial communities. We focused on two contrasting adjacent eddies within the Antarctic Polar Frontal Zone to determine how these features may influence the microbial communities within this region. The water masses and microbiota of the two eddies, representative of a cyclonic cold core from the Antarctic zone and an anti-cyclonic warm-core from the Subantarctic zone, were compared. The data reveal that the two eddies entrain distinct microbial communities from their points of origin that are maintained for up to ten months. Our findings highlight the ecological impact that changes, brought by the translocation of eddies across the ACC, have on microbial diversity. |
| doi_str_mv | 10.1371/journal.pone.0183400 |
| format | Article |
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In doing so, these features are biologically important, providing a mechanism for the mixing and exchange of nutrients and biota within the ocean. Transient mesoscale eddies in the Southern Ocean are known to relocate zooplankton communities across the Antarctic Circumpolar Current (ACC) and are important foraging grounds for marine top predators. In this study we investigated the role of cyclonic and anti-cyclonic eddies formed at the South-West Indian Ridge on the spatial variability and diversity of microbial communities. We focused on two contrasting adjacent eddies within the Antarctic Polar Frontal Zone to determine how these features may influence the microbial communities within this region. The water masses and microbiota of the two eddies, representative of a cyclonic cold core from the Antarctic zone and an anti-cyclonic warm-core from the Subantarctic zone, were compared. The data reveal that the two eddies entrain distinct microbial communities from their points of origin that are maintained for up to ten months. Our findings highlight the ecological impact that changes, brought by the translocation of eddies across the ACC, have on microbial diversity.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>28827834</pmid><doi>10.1371/journal.pone.0183400</doi><orcidid>https://orcid.org/0000-0002-8694-367X</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | Antarctic Circumpolar Current Antarctic front Antarctic Regions Antarctic zone Bacteria - classification Bacteria - genetics Bacteria - isolation & purification Biochemistry Biodiversity Biogeochemistry Biogeography Biology and Life Sciences Biota Circulation Communities Earth sciences Ecology Ecology and Environmental Sciences Ecosystem Eddies Eddy currents Entrainment Environmental aspects Fluxes Forage Forages Marine microbiology Mesoscale eddies Microbial activity Microbiomes Microorganisms Nutrients Ocean circulation Ocean currents Oceanic circulation Oceanography Oceans Oceans and Seas People and Places Physical Sciences Plankton Polar environments Predators Research and Analysis Methods RNA, Ribosomal, 16S - genetics Spatial distribution Spatial variability Studies Translocation Upper ocean Variability Water circulation Water Microbiology Water Movements Zooplankton |
| title | A pivotal role for ocean eddies in the distribution of microbial communities across the Antarctic Circumpolar Current |
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