Is there a seamount effect on microbial community structure and biomass? The case study of Seine and Sedlo seamounts (northeast Atlantic).
Seamounts are considered to be "hotspots" of marine life but, their role in oceans primary productivity is still under discussion. We have studied the microbial community structure and biomass of the epipelagic zone (0-150 m) at two northeast Atlantic seamounts (Seine and Sedlo) and compar...
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ftdoajarticles:oai:doaj.org/article:649ebe3b442440b5aeba4ef746022f3a 2023-05-15T17:41:19+02:00 Is there a seamount effect on microbial community structure and biomass? The case study of Seine and Sedlo seamounts (northeast Atlantic). Ana Mendonça Javier Arístegui Juan Carlos Vilas Maria Fernanda Montero Alicia Ojeda Minerva Espino Ana Martins 2012-01-01T00:00:00Z https://doi.org/10.1371/journal.pone.0029526 https://doaj.org/article/649ebe3b442440b5aeba4ef746022f3a EN eng Public Library of Science (PLoS) http://europepmc.org/articles/PMC3261146?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0029526 https://doaj.org/article/649ebe3b442440b5aeba4ef746022f3a PLoS ONE, Vol 7, Iss 1, p e29526 (2012) Medicine R Science Q article 2012 ftdoajarticles https://doi.org/10.1371/journal.pone.0029526 2022-12-31T04:12:31Z Seamounts are considered to be "hotspots" of marine life but, their role in oceans primary productivity is still under discussion. We have studied the microbial community structure and biomass of the epipelagic zone (0-150 m) at two northeast Atlantic seamounts (Seine and Sedlo) and compared those with the surrounding ocean. Results from two cruises to Sedlo and three to Seine are presented. Main results show large temporal and spatial microbial community variability on both seamounts. Both Seine and Sedlo heterotrophic community (abundance and biomass) dominate during winter and summer months, representing 75% (Sedlo, July) to 86% (Seine, November) of the total plankton biomass. In Seine, during springtime the contribution to total plankton biomass is similar (47% autotrophic and 53% heterotrophic). Both seamounts present an autotrophic community structure dominated by small cells (nano and picophytoplankton). It is also during spring that a relatively important contribution (26%) of large cells to total autotrophic biomass is found. In some cases, a "seamount effect" is observed on Seine and Sedlo microbial community structure and biomass. In Seine this is only observed during spring through enhancement of large autotrophic cells at the summit and seamount stations. In Sedlo, and despite the observed low biomasses, some clear peaks of picoplankton at the summit or at stations within the seamount area are also observed during summer. Our results suggest that the dominance of heterotrophs is presumably related to the trapping effect of organic matter by seamounts. Nevertheless, the complex circulation around both seamounts with the presence of different sources of mesoscale variability (e.g. presence of meddies, intrusion of African upwelling water) may have contributed to the different patterns of distribution, abundances and also changes observed in the microbial community. Article in Journal/Newspaper Northeast Atlantic Directory of Open Access Journals: DOAJ Articles PLoS ONE 7 1 e29526 |
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Medicine R Science Q Ana Mendonça Javier Arístegui Juan Carlos Vilas Maria Fernanda Montero Alicia Ojeda Minerva Espino Ana Martins Is there a seamount effect on microbial community structure and biomass? The case study of Seine and Sedlo seamounts (northeast Atlantic). |
topic_facet |
Medicine R Science Q |
description |
Seamounts are considered to be "hotspots" of marine life but, their role in oceans primary productivity is still under discussion. We have studied the microbial community structure and biomass of the epipelagic zone (0-150 m) at two northeast Atlantic seamounts (Seine and Sedlo) and compared those with the surrounding ocean. Results from two cruises to Sedlo and three to Seine are presented. Main results show large temporal and spatial microbial community variability on both seamounts. Both Seine and Sedlo heterotrophic community (abundance and biomass) dominate during winter and summer months, representing 75% (Sedlo, July) to 86% (Seine, November) of the total plankton biomass. In Seine, during springtime the contribution to total plankton biomass is similar (47% autotrophic and 53% heterotrophic). Both seamounts present an autotrophic community structure dominated by small cells (nano and picophytoplankton). It is also during spring that a relatively important contribution (26%) of large cells to total autotrophic biomass is found. In some cases, a "seamount effect" is observed on Seine and Sedlo microbial community structure and biomass. In Seine this is only observed during spring through enhancement of large autotrophic cells at the summit and seamount stations. In Sedlo, and despite the observed low biomasses, some clear peaks of picoplankton at the summit or at stations within the seamount area are also observed during summer. Our results suggest that the dominance of heterotrophs is presumably related to the trapping effect of organic matter by seamounts. Nevertheless, the complex circulation around both seamounts with the presence of different sources of mesoscale variability (e.g. presence of meddies, intrusion of African upwelling water) may have contributed to the different patterns of distribution, abundances and also changes observed in the microbial community. |
format |
Article in Journal/Newspaper |
author |
Ana Mendonça Javier Arístegui Juan Carlos Vilas Maria Fernanda Montero Alicia Ojeda Minerva Espino Ana Martins |
author_facet |
Ana Mendonça Javier Arístegui Juan Carlos Vilas Maria Fernanda Montero Alicia Ojeda Minerva Espino Ana Martins |
author_sort |
Ana Mendonça |
title |
Is there a seamount effect on microbial community structure and biomass? The case study of Seine and Sedlo seamounts (northeast Atlantic). |
title_short |
Is there a seamount effect on microbial community structure and biomass? The case study of Seine and Sedlo seamounts (northeast Atlantic). |
title_full |
Is there a seamount effect on microbial community structure and biomass? The case study of Seine and Sedlo seamounts (northeast Atlantic). |
title_fullStr |
Is there a seamount effect on microbial community structure and biomass? The case study of Seine and Sedlo seamounts (northeast Atlantic). |
title_full_unstemmed |
Is there a seamount effect on microbial community structure and biomass? The case study of Seine and Sedlo seamounts (northeast Atlantic). |
title_sort |
is there a seamount effect on microbial community structure and biomass? the case study of seine and sedlo seamounts (northeast atlantic). |
publisher |
Public Library of Science (PLoS) |
publishDate |
2012 |
url |
https://doi.org/10.1371/journal.pone.0029526 https://doaj.org/article/649ebe3b442440b5aeba4ef746022f3a |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_source |
PLoS ONE, Vol 7, Iss 1, p e29526 (2012) |
op_relation |
http://europepmc.org/articles/PMC3261146?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0029526 https://doaj.org/article/649ebe3b442440b5aeba4ef746022f3a |
op_doi |
https://doi.org/10.1371/journal.pone.0029526 |
container_title |
PLoS ONE |
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7 |
container_issue |
1 |
container_start_page |
e29526 |
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