Warming and CO2 Enhance Arctic Heterotrophic Microbial Activity
Ocean acidification and warming are two main consequences of climate change that can directly affect biological and ecosystem processes in marine habitats. The Arctic Ocean is the region of the world experiencing climate change at the steepest rate compared with other latitudes. Since marine plankto...
Published in: | Frontiers in Microbiology |
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Main Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2019
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Online Access: | https://pure.au.dk/portal/da/publications/warming-and-co2-enhance-arctic-heterotrophic-microbial-activity(5d1d01f7-a7df-4017-8484-1e3c2d3099c8).html https://doi.org/10.3389/fmicb.2019.00494 |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/5d1d01f7-a7df-4017-8484-1e3c2d3099c8 2023-12-24T10:12:03+01:00 Warming and CO2 Enhance Arctic Heterotrophic Microbial Activity Vaqué, Dolors Lara, Elena Arrieta, Jesús M. Holding, Johnna Sà, Elisabet L. Hendriks, Iris E. Coello-Camba, Alexandra Alvarez, Marta Agustí, Susana Wassmann, Paul F. Duarte, Carlos M. 2019-03 https://pure.au.dk/portal/da/publications/warming-and-co2-enhance-arctic-heterotrophic-microbial-activity(5d1d01f7-a7df-4017-8484-1e3c2d3099c8).html https://doi.org/10.3389/fmicb.2019.00494 eng eng https://pure.au.dk/portal/da/publications/warming-and-co2-enhance-arctic-heterotrophic-microbial-activity(5d1d01f7-a7df-4017-8484-1e3c2d3099c8).html info:eu-repo/semantics/openAccess Vaqué , D , Lara , E , Arrieta , J M , Holding , J , Sà , E L , Hendriks , I E , Coello-Camba , A , Alvarez , M , Agustí , S , Wassmann , P F & Duarte , C M 2019 , ' Warming and CO2 Enhance Arctic Heterotrophic Microbial Activity ' , Frontiers in Microbiology , vol. 10 , no. 494 , 494 . https://doi.org/10.3389/fmicb.2019.00494 Arctic Ocean Microbial food-webs Temperature Viral life cycle pCO article 2019 ftuniaarhuspubl https://doi.org/10.3389/fmicb.2019.00494 2023-11-30T00:00:22Z Ocean acidification and warming are two main consequences of climate change that can directly affect biological and ecosystem processes in marine habitats. The Arctic Ocean is the region of the world experiencing climate change at the steepest rate compared with other latitudes. Since marine planktonic microorganisms play a key role in the biogeochemical cycles in the ocean it is crucial to simultaneously evaluate the effect of warming and increasing CO 2 on marine microbial communities. In 20 L experimental microcosms filled with water from a high-Arctic fjord (Svalbard), we examined changes in phototrophic and heterotrophic microbial abundances and processes [bacterial production (BP) and mortality], and viral activity (lytic and lysogenic) in relation to warming and elevated CO 2 . The summer microbial plankton community living at 1.4°C in situ temperature, was exposed to increased CO 2 concentrations (135–2,318 μatm) in three controlled temperature treatments (1, 6, and 10°C) at the UNIS installations in Longyearbyen (Svalbard), in summer 2010. Results showed that chlorophyll a concentration decreased at increasing temperatures, while BP significantly increased with pCO 2 at 6 and 10°C. Lytic viral production was not affected by changes in pCO 2 and temperature, while lysogeny increased significantly at increasing levels of pCO 2 , especially at 10°C (R 2 = 0.858, p = 0.02). Moreover, protistan grazing rates showed a positive interaction between pCO 2 and temperature. The averaged percentage of bacteria grazed per day was higher (19.56 ± 2.77% d -1 ) than the averaged percentage of lysed bacteria by virus (7.18 ± 1.50% d -1 ) for all treatments. Furthermore, the relationship among microbial abundances and processes showed that BP was significantly related to phototrophic pico/nanoflagellate abundance in the 1°C and the 6°C treatments, and BP triggered viral activity, mainly lysogeny at 6 and 10°C, while bacterial mortality rates was significantly related to bacterial abundances at 6°C. Consequently, our ... Article in Journal/Newspaper Arctic Arctic Arctic Ocean Climate change Longyearbyen Ocean acidification Svalbard UNIS Aarhus University: Research Arctic Arctic Ocean Longyearbyen Svalbard Frontiers in Microbiology 10 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
Arctic Ocean Microbial food-webs Temperature Viral life cycle pCO |
spellingShingle |
Arctic Ocean Microbial food-webs Temperature Viral life cycle pCO Vaqué, Dolors Lara, Elena Arrieta, Jesús M. Holding, Johnna Sà, Elisabet L. Hendriks, Iris E. Coello-Camba, Alexandra Alvarez, Marta Agustí, Susana Wassmann, Paul F. Duarte, Carlos M. Warming and CO2 Enhance Arctic Heterotrophic Microbial Activity |
topic_facet |
Arctic Ocean Microbial food-webs Temperature Viral life cycle pCO |
description |
Ocean acidification and warming are two main consequences of climate change that can directly affect biological and ecosystem processes in marine habitats. The Arctic Ocean is the region of the world experiencing climate change at the steepest rate compared with other latitudes. Since marine planktonic microorganisms play a key role in the biogeochemical cycles in the ocean it is crucial to simultaneously evaluate the effect of warming and increasing CO 2 on marine microbial communities. In 20 L experimental microcosms filled with water from a high-Arctic fjord (Svalbard), we examined changes in phototrophic and heterotrophic microbial abundances and processes [bacterial production (BP) and mortality], and viral activity (lytic and lysogenic) in relation to warming and elevated CO 2 . The summer microbial plankton community living at 1.4°C in situ temperature, was exposed to increased CO 2 concentrations (135–2,318 μatm) in three controlled temperature treatments (1, 6, and 10°C) at the UNIS installations in Longyearbyen (Svalbard), in summer 2010. Results showed that chlorophyll a concentration decreased at increasing temperatures, while BP significantly increased with pCO 2 at 6 and 10°C. Lytic viral production was not affected by changes in pCO 2 and temperature, while lysogeny increased significantly at increasing levels of pCO 2 , especially at 10°C (R 2 = 0.858, p = 0.02). Moreover, protistan grazing rates showed a positive interaction between pCO 2 and temperature. The averaged percentage of bacteria grazed per day was higher (19.56 ± 2.77% d -1 ) than the averaged percentage of lysed bacteria by virus (7.18 ± 1.50% d -1 ) for all treatments. Furthermore, the relationship among microbial abundances and processes showed that BP was significantly related to phototrophic pico/nanoflagellate abundance in the 1°C and the 6°C treatments, and BP triggered viral activity, mainly lysogeny at 6 and 10°C, while bacterial mortality rates was significantly related to bacterial abundances at 6°C. Consequently, our ... |
format |
Article in Journal/Newspaper |
author |
Vaqué, Dolors Lara, Elena Arrieta, Jesús M. Holding, Johnna Sà, Elisabet L. Hendriks, Iris E. Coello-Camba, Alexandra Alvarez, Marta Agustí, Susana Wassmann, Paul F. Duarte, Carlos M. |
author_facet |
Vaqué, Dolors Lara, Elena Arrieta, Jesús M. Holding, Johnna Sà, Elisabet L. Hendriks, Iris E. Coello-Camba, Alexandra Alvarez, Marta Agustí, Susana Wassmann, Paul F. Duarte, Carlos M. |
author_sort |
Vaqué, Dolors |
title |
Warming and CO2 Enhance Arctic Heterotrophic Microbial Activity |
title_short |
Warming and CO2 Enhance Arctic Heterotrophic Microbial Activity |
title_full |
Warming and CO2 Enhance Arctic Heterotrophic Microbial Activity |
title_fullStr |
Warming and CO2 Enhance Arctic Heterotrophic Microbial Activity |
title_full_unstemmed |
Warming and CO2 Enhance Arctic Heterotrophic Microbial Activity |
title_sort |
warming and co2 enhance arctic heterotrophic microbial activity |
publishDate |
2019 |
url |
https://pure.au.dk/portal/da/publications/warming-and-co2-enhance-arctic-heterotrophic-microbial-activity(5d1d01f7-a7df-4017-8484-1e3c2d3099c8).html https://doi.org/10.3389/fmicb.2019.00494 |
geographic |
Arctic Arctic Ocean Longyearbyen Svalbard |
geographic_facet |
Arctic Arctic Ocean Longyearbyen Svalbard |
genre |
Arctic Arctic Arctic Ocean Climate change Longyearbyen Ocean acidification Svalbard UNIS |
genre_facet |
Arctic Arctic Arctic Ocean Climate change Longyearbyen Ocean acidification Svalbard UNIS |
op_source |
Vaqué , D , Lara , E , Arrieta , J M , Holding , J , Sà , E L , Hendriks , I E , Coello-Camba , A , Alvarez , M , Agustí , S , Wassmann , P F & Duarte , C M 2019 , ' Warming and CO2 Enhance Arctic Heterotrophic Microbial Activity ' , Frontiers in Microbiology , vol. 10 , no. 494 , 494 . https://doi.org/10.3389/fmicb.2019.00494 |
op_relation |
https://pure.au.dk/portal/da/publications/warming-and-co2-enhance-arctic-heterotrophic-microbial-activity(5d1d01f7-a7df-4017-8484-1e3c2d3099c8).html |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3389/fmicb.2019.00494 |
container_title |
Frontiers in Microbiology |
container_volume |
10 |
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1786172307741343744 |