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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ftunivlaspalmas:oai:https://accedacris.ulpgc.es:10553/8325 2023-05-15T17:41:21+02:00 Is there a seamount effect on microbial community structure and biomass?: the case study of Seine and Sedlo seamounts (Northeast Atlantic) Mendonça, Ana Aristegui, J. Vilas Español, Juan Carlos Montero del Pino, María F. Ojeda Rodríguez, Alicia Espino, Minerva Martins, Ana 2012-09-19T04:00:40Z application/pdf http://hdl.handle.net/10553/8325 eng eng PLoS ONE http://hdl.handle.net/10553/8325 663563 663563 -;2728;-;32728;-;-;- 663563 -;2728;-;32728;-;-;- by-nc-nd info:eu-repo/semantics/openAccess CC-BY-NC-ND Plos One, ublic Library of Science, 1932-6203, v. 7, n. 1, 29526, p. 1-13 251001 Oceanografía biológica Seamounts Plankton Oceans Phytoplankton Bionanotechnology Species diversity Article 2012 ftunivlaspalmas 2019-09-08T16:38:21Z 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 Universidad de Las Palmas de Gran Canaria: Acceda |
institution |
Open Polar |
collection |
Universidad de Las Palmas de Gran Canaria: Acceda |
op_collection_id |
ftunivlaspalmas |
language |
English |
topic |
251001 Oceanografía biológica Seamounts Plankton Oceans Phytoplankton Bionanotechnology Species diversity |
spellingShingle |
251001 Oceanografía biológica Seamounts Plankton Oceans Phytoplankton Bionanotechnology Species diversity Mendonça, Ana Aristegui, J. Vilas Español, Juan Carlos Montero del Pino, María F. Ojeda Rodríguez, Alicia Espino, Minerva Martins, Ana Is there a seamount effect on microbial community structure and biomass?: the case study of Seine and Sedlo seamounts (Northeast Atlantic) |
topic_facet |
251001 Oceanografía biológica Seamounts Plankton Oceans Phytoplankton Bionanotechnology Species diversity |
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 |
Mendonça, Ana Aristegui, J. Vilas Español, Juan Carlos Montero del Pino, María F. Ojeda Rodríguez, Alicia Espino, Minerva Martins, Ana |
author_facet |
Mendonça, Ana Aristegui, J. Vilas Español, Juan Carlos Montero del Pino, María F. Ojeda Rodríguez, Alicia Espino, Minerva Martins, Ana |
author_sort |
Mendonça, Ana |
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) |
publishDate |
2012 |
url |
http://hdl.handle.net/10553/8325 |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_source |
Plos One, ublic Library of Science, 1932-6203, v. 7, n. 1, 29526, p. 1-13 |
op_relation |
PLoS ONE http://hdl.handle.net/10553/8325 663563 663563 -;2728;-;32728;-;-;- 663563 -;2728;-;32728;-;-;- |
op_rights |
by-nc-nd info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY-NC-ND |
_version_ |
1766142860319522816 |