Experimental evaluation of the warming effect on viral, bacterial and protistan communities in two contrasting Arctic systems
The effect of Arctic warming, which is 3 times faster than the global average, on microbial communities was evaluated experimentally to determine how increasing temperatures affect bacterial and viral abundance and production, protist community composition, and bacterial loss rates (bacterivory and...
Published in: | Aquatic Microbial Ecology |
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ftcsic:oai:digital.csic.es:10261/86482 2024-02-11T10:00:04+01:00 Experimental evaluation of the warming effect on viral, bacterial and protistan communities in two contrasting Arctic systems Lara, Elena Arrieta López de Uralde, Jesús M. García-Zarandona, Iñigo Boras, Julia A. Duarte, Carlos M. Agustí, Susana Wassmann, Paul F. Vaqué, Dolors 2013 http://hdl.handle.net/10261/86482 https://doi.org/10.3354/ame01636 en eng Inter Research Publisher's version https://dx.doi.org/10.3354/ame01636 doi:10.3354/ame01636 issn: 0948-3055 e-issn: 1616-1564 Aquatic Microbial Ecology 70(1): 17-32 (2013) http://hdl.handle.net/10261/86482 open artículo http://purl.org/coar/resource_type/c_6501 2013 ftcsic https://doi.org/10.3354/ame01636 2024-01-16T09:54:03Z The effect of Arctic warming, which is 3 times faster than the global average, on microbial communities was evaluated experimentally to determine how increasing temperatures affect bacterial and viral abundance and production, protist community composition, and bacterial loss rates (bacterivory and lysis) in 2 contrasting Arctic marine systems. In July 2009, we collected samples from open Arctic waters in the Barents Sea and Atlantic-influenced waters in Isfjorden, Svalbard Islands (Fjord waters). The samples were used in 2 microcosm experiments at 7 temperatures, ranging from 1.0 to 10.0°C. In the open Arctic microbial community, collected at <1.0°C, bacterial and viral abundances, bacterial production and grazing rates due to protists increased significantly above 5.5°C, and remained at high values at even higher experimental temperatures. The abundance of protists, such as some heterotrophic pico/nanoflagellates, as well as some ciliates, also increased with warming. In contrast, the biomass of phototrophs decreased above 5.5°C. The water temperature in Fjord waters was 6.2°C at the time of sampling, and the microbial community showed smaller variations than the Arctic community. These results indicate that increases in temperature stimulate heterotrophic microbial biomass and activity compared to that of phototrophs, which has important implications for carbon and nutrient cycling in the system. In addition, open Arctic communities were more vulnerable to warming than those already adapted to the warmer Fjord waters influenced by Atlantic seawater. © Inter-Research 2013. Peer Reviewed Article in Journal/Newspaper Arctic Barents Sea Isfjord* Isfjorden Svalbard Digital.CSIC (Spanish National Research Council) Arctic Barents Sea Svalbard Aquatic Microbial Ecology 70 1 17 32 |
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Open Polar |
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Digital.CSIC (Spanish National Research Council) |
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ftcsic |
language |
English |
description |
The effect of Arctic warming, which is 3 times faster than the global average, on microbial communities was evaluated experimentally to determine how increasing temperatures affect bacterial and viral abundance and production, protist community composition, and bacterial loss rates (bacterivory and lysis) in 2 contrasting Arctic marine systems. In July 2009, we collected samples from open Arctic waters in the Barents Sea and Atlantic-influenced waters in Isfjorden, Svalbard Islands (Fjord waters). The samples were used in 2 microcosm experiments at 7 temperatures, ranging from 1.0 to 10.0°C. In the open Arctic microbial community, collected at <1.0°C, bacterial and viral abundances, bacterial production and grazing rates due to protists increased significantly above 5.5°C, and remained at high values at even higher experimental temperatures. The abundance of protists, such as some heterotrophic pico/nanoflagellates, as well as some ciliates, also increased with warming. In contrast, the biomass of phototrophs decreased above 5.5°C. The water temperature in Fjord waters was 6.2°C at the time of sampling, and the microbial community showed smaller variations than the Arctic community. These results indicate that increases in temperature stimulate heterotrophic microbial biomass and activity compared to that of phototrophs, which has important implications for carbon and nutrient cycling in the system. In addition, open Arctic communities were more vulnerable to warming than those already adapted to the warmer Fjord waters influenced by Atlantic seawater. © Inter-Research 2013. Peer Reviewed |
format |
Article in Journal/Newspaper |
author |
Lara, Elena Arrieta López de Uralde, Jesús M. García-Zarandona, Iñigo Boras, Julia A. Duarte, Carlos M. Agustí, Susana Wassmann, Paul F. Vaqué, Dolors |
spellingShingle |
Lara, Elena Arrieta López de Uralde, Jesús M. García-Zarandona, Iñigo Boras, Julia A. Duarte, Carlos M. Agustí, Susana Wassmann, Paul F. Vaqué, Dolors Experimental evaluation of the warming effect on viral, bacterial and protistan communities in two contrasting Arctic systems |
author_facet |
Lara, Elena Arrieta López de Uralde, Jesús M. García-Zarandona, Iñigo Boras, Julia A. Duarte, Carlos M. Agustí, Susana Wassmann, Paul F. Vaqué, Dolors |
author_sort |
Lara, Elena |
title |
Experimental evaluation of the warming effect on viral, bacterial and protistan communities in two contrasting Arctic systems |
title_short |
Experimental evaluation of the warming effect on viral, bacterial and protistan communities in two contrasting Arctic systems |
title_full |
Experimental evaluation of the warming effect on viral, bacterial and protistan communities in two contrasting Arctic systems |
title_fullStr |
Experimental evaluation of the warming effect on viral, bacterial and protistan communities in two contrasting Arctic systems |
title_full_unstemmed |
Experimental evaluation of the warming effect on viral, bacterial and protistan communities in two contrasting Arctic systems |
title_sort |
experimental evaluation of the warming effect on viral, bacterial and protistan communities in two contrasting arctic systems |
publisher |
Inter Research |
publishDate |
2013 |
url |
http://hdl.handle.net/10261/86482 https://doi.org/10.3354/ame01636 |
geographic |
Arctic Barents Sea Svalbard |
geographic_facet |
Arctic Barents Sea Svalbard |
genre |
Arctic Barents Sea Isfjord* Isfjorden Svalbard |
genre_facet |
Arctic Barents Sea Isfjord* Isfjorden Svalbard |
op_relation |
Publisher's version https://dx.doi.org/10.3354/ame01636 doi:10.3354/ame01636 issn: 0948-3055 e-issn: 1616-1564 Aquatic Microbial Ecology 70(1): 17-32 (2013) http://hdl.handle.net/10261/86482 |
op_rights |
open |
op_doi |
https://doi.org/10.3354/ame01636 |
container_title |
Aquatic Microbial Ecology |
container_volume |
70 |
container_issue |
1 |
container_start_page |
17 |
op_container_end_page |
32 |
_version_ |
1790595771721056256 |