Primary production and bacterial carbon metabolism around South Shetland Islands in the Southern Ocean
Phytoplankton and bacterioplankton dynamics were studied around South Shetland Islands (Antarctica) with special emphasis on the Drake Passage region, during austral summer, in order to expand our knowledge on the coupling between the autotrophic and heterotrophic microbial plankton compartments in...
Published in: | Deep Sea Research Part I: Oceanographic Research Papers |
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Language: | English |
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Online Access: | http://hdl.handle.net/10553/49867 https://doi.org/10.1016/j.dsr.2012.07.002 |
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ftunivlaspalmas:oai:https://accedacris.ulpgc.es:10553/49867 2023-05-15T13:45:50+02:00 Primary production and bacterial carbon metabolism around South Shetland Islands in the Southern Ocean Teira, Eva Mouriño-Carballido, Beatriz Martínez-García, Sandra Sobrino, Cristina Ameneiro, Julia Hernández-León, Santiago Vázquez, Elsa 55928804300 23027967000 26537915600 6602977110 16645098300 6701465678 56273624400 2012 http://hdl.handle.net/10553/49867 https://doi.org/10.1016/j.dsr.2012.07.002 eng eng 0967-0637 Acoplamiento Físico-Biológico en El Rango de la Mesoscala Alrededor de Las Islas Shetland Del Sur (Antártida): Soporte Físico y Zooplancton. Deep-Sea Research Part I: Oceanographic Research Papers 0967-0637 http://hdl.handle.net/10553/49867 doi:10.1016/j.dsr.2012.07.002 84866493827 81 70 69 Deep-Sea Research Part I: Oceanographic Research Papers [ISSN 0967-0637], v. 69, p. 70-81 Investigación Primary production Photochemical efficiency Bacterial production Bacterial growth efficiency South Shetland Islands Drake Passage 2012 ftunivlaspalmas https://doi.org/10.1016/j.dsr.2012.07.002 2020-02-12T00:09:52Z Phytoplankton and bacterioplankton dynamics were studied around South Shetland Islands (Antarctica) with special emphasis on the Drake Passage region, during austral summer, in order to expand our knowledge on the coupling between the autotrophic and heterotrophic microbial plankton compartments in polar ecosystems. In addition, we directly estimated bacterial growth efficiency in the Drake Passage with the aim of better constraining total bacterial carbon utilization in this important polar ecosystem. Integrated chlorophyll-a concentration (21–86 mg m−2), primary production rates (0.7–19.3 mg C m−3 d−1) and mean water-column photochemical efficiency (0.24–0.60) were significantly correlated with Si⁎ tracer (r2=0.55, 0.46 and 0.64, respectively), which indirectly points to iron as the major limiting factor for phytoplankton growth in the area. Bacterial production was considerably low (0.002–0.3 mg C m−3 d−1) and was best explained by chlorophyll-a concentration, protein-like fluorescence of dissolved organic matter and temperature (r2=0.53, p<0.001). Water temperature appeared to influence bacterial activity when organic substrate availability is high. Bacterial production accounted on average for only 3.9% of co-occurring primary production, which has been frequently interpreted as an indicator of the marked uncoupling between bacteria and phytoplankton in cold waters. However, using the experimentally derived mean bacterial growth efficiency for the photic zone (6.1±1.3%) the bacterial carbon demand represented on average 63±18% of concomitant primary production, similar to what is found in warmer productive waters. Thus, our study suggests that bacterioplankton and phytoplankton appear to be connected in this polar area. Other/Unknown Material Antarc* Antarctica Drake Passage South Shetland Islands Southern Ocean Universidad de Las Palmas de Gran Canaria: Acceda Austral Drake Passage South Shetland Islands Southern Ocean Deep Sea Research Part I: Oceanographic Research Papers 69 70 81 |
institution |
Open Polar |
collection |
Universidad de Las Palmas de Gran Canaria: Acceda |
op_collection_id |
ftunivlaspalmas |
language |
English |
topic |
Investigación Primary production Photochemical efficiency Bacterial production Bacterial growth efficiency South Shetland Islands Drake Passage |
spellingShingle |
Investigación Primary production Photochemical efficiency Bacterial production Bacterial growth efficiency South Shetland Islands Drake Passage Teira, Eva Mouriño-Carballido, Beatriz Martínez-García, Sandra Sobrino, Cristina Ameneiro, Julia Hernández-León, Santiago Vázquez, Elsa Primary production and bacterial carbon metabolism around South Shetland Islands in the Southern Ocean |
topic_facet |
Investigación Primary production Photochemical efficiency Bacterial production Bacterial growth efficiency South Shetland Islands Drake Passage |
description |
Phytoplankton and bacterioplankton dynamics were studied around South Shetland Islands (Antarctica) with special emphasis on the Drake Passage region, during austral summer, in order to expand our knowledge on the coupling between the autotrophic and heterotrophic microbial plankton compartments in polar ecosystems. In addition, we directly estimated bacterial growth efficiency in the Drake Passage with the aim of better constraining total bacterial carbon utilization in this important polar ecosystem. Integrated chlorophyll-a concentration (21–86 mg m−2), primary production rates (0.7–19.3 mg C m−3 d−1) and mean water-column photochemical efficiency (0.24–0.60) were significantly correlated with Si⁎ tracer (r2=0.55, 0.46 and 0.64, respectively), which indirectly points to iron as the major limiting factor for phytoplankton growth in the area. Bacterial production was considerably low (0.002–0.3 mg C m−3 d−1) and was best explained by chlorophyll-a concentration, protein-like fluorescence of dissolved organic matter and temperature (r2=0.53, p<0.001). Water temperature appeared to influence bacterial activity when organic substrate availability is high. Bacterial production accounted on average for only 3.9% of co-occurring primary production, which has been frequently interpreted as an indicator of the marked uncoupling between bacteria and phytoplankton in cold waters. However, using the experimentally derived mean bacterial growth efficiency for the photic zone (6.1±1.3%) the bacterial carbon demand represented on average 63±18% of concomitant primary production, similar to what is found in warmer productive waters. Thus, our study suggests that bacterioplankton and phytoplankton appear to be connected in this polar area. |
author2 |
55928804300 23027967000 26537915600 6602977110 16645098300 6701465678 56273624400 |
author |
Teira, Eva Mouriño-Carballido, Beatriz Martínez-García, Sandra Sobrino, Cristina Ameneiro, Julia Hernández-León, Santiago Vázquez, Elsa |
author_facet |
Teira, Eva Mouriño-Carballido, Beatriz Martínez-García, Sandra Sobrino, Cristina Ameneiro, Julia Hernández-León, Santiago Vázquez, Elsa |
author_sort |
Teira, Eva |
title |
Primary production and bacterial carbon metabolism around South Shetland Islands in the Southern Ocean |
title_short |
Primary production and bacterial carbon metabolism around South Shetland Islands in the Southern Ocean |
title_full |
Primary production and bacterial carbon metabolism around South Shetland Islands in the Southern Ocean |
title_fullStr |
Primary production and bacterial carbon metabolism around South Shetland Islands in the Southern Ocean |
title_full_unstemmed |
Primary production and bacterial carbon metabolism around South Shetland Islands in the Southern Ocean |
title_sort |
primary production and bacterial carbon metabolism around south shetland islands in the southern ocean |
publisher |
0967-0637 |
publishDate |
2012 |
url |
http://hdl.handle.net/10553/49867 https://doi.org/10.1016/j.dsr.2012.07.002 |
geographic |
Austral Drake Passage South Shetland Islands Southern Ocean |
geographic_facet |
Austral Drake Passage South Shetland Islands Southern Ocean |
genre |
Antarc* Antarctica Drake Passage South Shetland Islands Southern Ocean |
genre_facet |
Antarc* Antarctica Drake Passage South Shetland Islands Southern Ocean |
op_source |
Deep-Sea Research Part I: Oceanographic Research Papers [ISSN 0967-0637], v. 69, p. 70-81 |
op_relation |
Acoplamiento Físico-Biológico en El Rango de la Mesoscala Alrededor de Las Islas Shetland Del Sur (Antártida): Soporte Físico y Zooplancton. Deep-Sea Research Part I: Oceanographic Research Papers 0967-0637 http://hdl.handle.net/10553/49867 doi:10.1016/j.dsr.2012.07.002 84866493827 81 70 69 |
op_doi |
https://doi.org/10.1016/j.dsr.2012.07.002 |
container_title |
Deep Sea Research Part I: Oceanographic Research Papers |
container_volume |
69 |
container_start_page |
70 |
op_container_end_page |
81 |
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1766231508896448512 |