Microbial metabolic rates in the Ross Sea: the ABIOCLEAR Project
The Ross Sea is one of the most productive areas of the Southern Ocean and includes several functionally different marine ecosystems. With the aim of identifying signs and patterns of microbial response to current climate change, seawater microbial populations were sampled at different depths, from...
Published in: | Nature Conservation |
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Online Access: | http://hdl.handle.net/10553/60010 https://doi.org/10.3897/natureconservation.34.30631 |
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ftunivlaspalmas:oai:accedacris.ulpgc.es:10553/60010 2023-05-15T14:06:26+02:00 Microbial metabolic rates in the Ross Sea: the ABIOCLEAR Project Azzaro, Maurizio Packard, Theodore T. Monticelli, Luis Salvador Maimone, Giovanna Rappazzo, Alessandro Ciro Azzaro, Filippo Grilli, Federica Crisafi, Ermanno La Ferla, Rosabruna 6602752439 7004249480 8580879000 7801432695 57193571185 8516485200 9744835500 6701399786 6603903241 242445 311411 1687522 1731347 8339441 1405492 2091705 28240357 1991283 WOS:Azzaro, M WOS:Packard, TT WOS:Monticelli, LS WOS:Maimone, G WOS:Rappazzo, AC WOS:Azzaro, F WOS:Grilli, F WOS:Crisafi, E WOS:La Ferla, R BU-BAS 2019 http://hdl.handle.net/10553/60010 https://doi.org/10.3897/natureconservation.34.30631 eng eng Nature Conservation 1314-6947 WoS http://hdl.handle.net/10553/60010 doi:10.3897/natureconservation.34.30631 85065591416 000466756300019 1314-3301 34 Sí Nature Conservation-Bulgaria [ISSN 1314-6947], n. 34, p. 441-475 251001 Oceanografía biológica Bacterial-Growth Efficiency Electron-Transport Activity Leucine Incorporation Biomass Production Mediterranean Sea Protein-Synthesis Organic-Matter Water-Column Carbon Flux Deep-Water Microbial respiration Heterotrophic production Heterotrophic energy production Ross Sea Antarctica LTER info:eu-repo/semantics/Article Article 2019 ftunivlaspalmas https://doi.org/10.3897/natureconservation.34.30631 2022-05-17T23:13:54Z The Ross Sea is one of the most productive areas of the Southern Ocean and includes several functionally different marine ecosystems. With the aim of identifying signs and patterns of microbial response to current climate change, seawater microbial populations were sampled at different depths, from surface to the bottom, at two Ross Sea mooring areas southeast of Victoria Land in Antarctica. This oceanographic experiment, the XX Italian Antarctic Expedition, 2004-05, was carried out in the framework of the ABIOCLEAR project as part of LTER-Italy. Here, microbial biogeochemical rates of respiration, carbon dioxide production, total community heterotrophic energy production, prokaryotic heterotrophic activity, production (by H-3-Ieucine uptake) and prokaryotic biomass (by image analysis) were determined throughout the water column. As ancillary parameters, chlorophyll a, adenosine-triphosphate concentrations, temperature and salinity were measured and reported. Microbial metabolism was highly variable amongst stations and depths. In epi- and mesopelagic zones, respiratory rates varied between 52.4-437.0 and 6.3-271.5 nanol O-2 l(-1)h(-1); prokaryotic heterotrophic production varied between 0.46-29.5 and 0.3-6.11 nanog C l(-1) h(-1) and prokaryotic biomass varied between 0.8-24.5 and 1.1-9.0 mu g C l(-1), respectively. The average heterotrophic energy production ranged between 570 and 103 mJ l(-1)h(-1)in upper and deeper layers, respectively. In the epipelagic layer, the Prokaryotic Carbon Demand and Prokaryotic Growth Efficiency averaged 9 times higher and 2 times lower, respectively, than in the mesopelagic one. The distribution of plankton metabolism and organic matter degradation was mainly related to the different hydrological and trophic conditions. In comparison with previous research, the Ross Sea results, here, evidenced a relatively impoverished oligotrophic microbial community, throughout the water column. 475 441 0,532 1,58 Q2 Q3 SCIE Article in Journal/Newspaper Antarc* Antarctic Antarctica Ross Sea Southern Ocean Victoria Land Universidad de Las Palmas de Gran Canaria: Acceda Antarctic Ross Sea Southern Ocean Victoria Land Nature Conservation 34 441 475 |
institution |
Open Polar |
collection |
Universidad de Las Palmas de Gran Canaria: Acceda |
op_collection_id |
ftunivlaspalmas |
language |
English |
topic |
251001 Oceanografía biológica Bacterial-Growth Efficiency Electron-Transport Activity Leucine Incorporation Biomass Production Mediterranean Sea Protein-Synthesis Organic-Matter Water-Column Carbon Flux Deep-Water Microbial respiration Heterotrophic production Heterotrophic energy production Ross Sea Antarctica LTER |
spellingShingle |
251001 Oceanografía biológica Bacterial-Growth Efficiency Electron-Transport Activity Leucine Incorporation Biomass Production Mediterranean Sea Protein-Synthesis Organic-Matter Water-Column Carbon Flux Deep-Water Microbial respiration Heterotrophic production Heterotrophic energy production Ross Sea Antarctica LTER Azzaro, Maurizio Packard, Theodore T. Monticelli, Luis Salvador Maimone, Giovanna Rappazzo, Alessandro Ciro Azzaro, Filippo Grilli, Federica Crisafi, Ermanno La Ferla, Rosabruna Microbial metabolic rates in the Ross Sea: the ABIOCLEAR Project |
topic_facet |
251001 Oceanografía biológica Bacterial-Growth Efficiency Electron-Transport Activity Leucine Incorporation Biomass Production Mediterranean Sea Protein-Synthesis Organic-Matter Water-Column Carbon Flux Deep-Water Microbial respiration Heterotrophic production Heterotrophic energy production Ross Sea Antarctica LTER |
description |
The Ross Sea is one of the most productive areas of the Southern Ocean and includes several functionally different marine ecosystems. With the aim of identifying signs and patterns of microbial response to current climate change, seawater microbial populations were sampled at different depths, from surface to the bottom, at two Ross Sea mooring areas southeast of Victoria Land in Antarctica. This oceanographic experiment, the XX Italian Antarctic Expedition, 2004-05, was carried out in the framework of the ABIOCLEAR project as part of LTER-Italy. Here, microbial biogeochemical rates of respiration, carbon dioxide production, total community heterotrophic energy production, prokaryotic heterotrophic activity, production (by H-3-Ieucine uptake) and prokaryotic biomass (by image analysis) were determined throughout the water column. As ancillary parameters, chlorophyll a, adenosine-triphosphate concentrations, temperature and salinity were measured and reported. Microbial metabolism was highly variable amongst stations and depths. In epi- and mesopelagic zones, respiratory rates varied between 52.4-437.0 and 6.3-271.5 nanol O-2 l(-1)h(-1); prokaryotic heterotrophic production varied between 0.46-29.5 and 0.3-6.11 nanog C l(-1) h(-1) and prokaryotic biomass varied between 0.8-24.5 and 1.1-9.0 mu g C l(-1), respectively. The average heterotrophic energy production ranged between 570 and 103 mJ l(-1)h(-1)in upper and deeper layers, respectively. In the epipelagic layer, the Prokaryotic Carbon Demand and Prokaryotic Growth Efficiency averaged 9 times higher and 2 times lower, respectively, than in the mesopelagic one. The distribution of plankton metabolism and organic matter degradation was mainly related to the different hydrological and trophic conditions. In comparison with previous research, the Ross Sea results, here, evidenced a relatively impoverished oligotrophic microbial community, throughout the water column. 475 441 0,532 1,58 Q2 Q3 SCIE |
author2 |
6602752439 7004249480 8580879000 7801432695 57193571185 8516485200 9744835500 6701399786 6603903241 242445 311411 1687522 1731347 8339441 1405492 2091705 28240357 1991283 WOS:Azzaro, M WOS:Packard, TT WOS:Monticelli, LS WOS:Maimone, G WOS:Rappazzo, AC WOS:Azzaro, F WOS:Grilli, F WOS:Crisafi, E WOS:La Ferla, R BU-BAS |
format |
Article in Journal/Newspaper |
author |
Azzaro, Maurizio Packard, Theodore T. Monticelli, Luis Salvador Maimone, Giovanna Rappazzo, Alessandro Ciro Azzaro, Filippo Grilli, Federica Crisafi, Ermanno La Ferla, Rosabruna |
author_facet |
Azzaro, Maurizio Packard, Theodore T. Monticelli, Luis Salvador Maimone, Giovanna Rappazzo, Alessandro Ciro Azzaro, Filippo Grilli, Federica Crisafi, Ermanno La Ferla, Rosabruna |
author_sort |
Azzaro, Maurizio |
title |
Microbial metabolic rates in the Ross Sea: the ABIOCLEAR Project |
title_short |
Microbial metabolic rates in the Ross Sea: the ABIOCLEAR Project |
title_full |
Microbial metabolic rates in the Ross Sea: the ABIOCLEAR Project |
title_fullStr |
Microbial metabolic rates in the Ross Sea: the ABIOCLEAR Project |
title_full_unstemmed |
Microbial metabolic rates in the Ross Sea: the ABIOCLEAR Project |
title_sort |
microbial metabolic rates in the ross sea: the abioclear project |
publishDate |
2019 |
url |
http://hdl.handle.net/10553/60010 https://doi.org/10.3897/natureconservation.34.30631 |
geographic |
Antarctic Ross Sea Southern Ocean Victoria Land |
geographic_facet |
Antarctic Ross Sea Southern Ocean Victoria Land |
genre |
Antarc* Antarctic Antarctica Ross Sea Southern Ocean Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica Ross Sea Southern Ocean Victoria Land |
op_source |
Nature Conservation-Bulgaria [ISSN 1314-6947], n. 34, p. 441-475 |
op_relation |
Nature Conservation 1314-6947 WoS http://hdl.handle.net/10553/60010 doi:10.3897/natureconservation.34.30631 85065591416 000466756300019 1314-3301 34 Sí |
op_doi |
https://doi.org/10.3897/natureconservation.34.30631 |
container_title |
Nature Conservation |
container_volume |
34 |
container_start_page |
441 |
op_container_end_page |
475 |
_version_ |
1766278145023934464 |