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...
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Online Access: | http://hdl.handle.net/10508/11573 http://hdl.handle.net/10261/317855 https://doi.org/10.3389/fmicb.2019.00494 |
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ftcsic:oai:digital.csic.es:10261/317855 2024-02-11T10:00:33+01:00 Warming and CO2 Enhance Arctic Heterotrophic Microbial Activity Vaqué, Dolors Lara, Elena Arrieta, Jesús María Holding, Johnna Sà, Elisabet L. Hendriks, I.E. Coello-Camba, Alexandra Álvarez, Marta Agustí, Susana Wassmann, Paul F. Duarte, Carlos Manuel Océan arctique Océano Ártico Arctic Ocean 2019 http://hdl.handle.net/10508/11573 http://hdl.handle.net/10261/317855 https://doi.org/10.3389/fmicb.2019.00494 en eng Centro Oceanográfico de Canarias AM Frontiers in Microbiology, 10. 2019: 1-13 http://hdl.handle.net/10508/11573 http://hdl.handle.net/10261/317855 doi:10.3389/fmicb.2019.00494 22556 open pCO2 Centro Oceanográfico de Canarias Medio Marino Temperature Microbial food-Webs Viral life cycle Arctic Ocean technology microbiology research gas exchange cellulose research article 2019 ftcsic https://doi.org/10.3389/fmicb.2019.00494 2024-01-16T11:44:53Z 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 CO2 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 CO2. The summer microbial plankton community living at 1.4°C in situ temperature, was exposed to increased CO2 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 pCO2 at 6 and 10°C. Lytic viral production was not affected by changes in pCO2 and temperature, while lysogeny increased significantly at increasing levels of pCO2, especially at 10°C (R2 = 0.858, p = 0.02). Moreover, protistan grazing rates showed a positive interaction between pCO2 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 experimental ... Article in Journal/Newspaper Arctic Arctic Ocean Arctique* Climate change Longyearbyen Ocean acidification Océan Arctique Océano Ártico Svalbard UNIS Digital.CSIC (Spanish National Research Council) Arctic Arctic Ocean Longyearbyen Svalbard Frontiers in Microbiology 10 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
pCO2 Centro Oceanográfico de Canarias Medio Marino Temperature Microbial food-Webs Viral life cycle Arctic Ocean technology microbiology research gas exchange cellulose |
spellingShingle |
pCO2 Centro Oceanográfico de Canarias Medio Marino Temperature Microbial food-Webs Viral life cycle Arctic Ocean technology microbiology research gas exchange cellulose Vaqué, Dolors Lara, Elena Arrieta, Jesús María Holding, Johnna Sà, Elisabet L. Hendriks, I.E. Coello-Camba, Alexandra Álvarez, Marta Agustí, Susana Wassmann, Paul F. Duarte, Carlos Manuel Warming and CO2 Enhance Arctic Heterotrophic Microbial Activity |
topic_facet |
pCO2 Centro Oceanográfico de Canarias Medio Marino Temperature Microbial food-Webs Viral life cycle Arctic Ocean technology microbiology research gas exchange cellulose |
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 CO2 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 CO2. The summer microbial plankton community living at 1.4°C in situ temperature, was exposed to increased CO2 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 pCO2 at 6 and 10°C. Lytic viral production was not affected by changes in pCO2 and temperature, while lysogeny increased significantly at increasing levels of pCO2, especially at 10°C (R2 = 0.858, p = 0.02). Moreover, protistan grazing rates showed a positive interaction between pCO2 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 experimental ... |
format |
Article in Journal/Newspaper |
author |
Vaqué, Dolors Lara, Elena Arrieta, Jesús María Holding, Johnna Sà, Elisabet L. Hendriks, I.E. Coello-Camba, Alexandra Álvarez, Marta Agustí, Susana Wassmann, Paul F. Duarte, Carlos Manuel |
author_facet |
Vaqué, Dolors Lara, Elena Arrieta, Jesús María Holding, Johnna Sà, Elisabet L. Hendriks, I.E. Coello-Camba, Alexandra Álvarez, Marta Agustí, Susana Wassmann, Paul F. Duarte, Carlos Manuel |
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 |
http://hdl.handle.net/10508/11573 http://hdl.handle.net/10261/317855 https://doi.org/10.3389/fmicb.2019.00494 |
op_coverage |
Océan arctique Océano Ártico Arctic Ocean |
geographic |
Arctic Arctic Ocean Longyearbyen Svalbard |
geographic_facet |
Arctic Arctic Ocean Longyearbyen Svalbard |
genre |
Arctic Arctic Ocean Arctique* Climate change Longyearbyen Ocean acidification Océan Arctique Océano Ártico Svalbard UNIS |
genre_facet |
Arctic Arctic Ocean Arctique* Climate change Longyearbyen Ocean acidification Océan Arctique Océano Ártico Svalbard UNIS |
op_relation |
Centro Oceanográfico de Canarias AM Frontiers in Microbiology, 10. 2019: 1-13 http://hdl.handle.net/10508/11573 http://hdl.handle.net/10261/317855 doi:10.3389/fmicb.2019.00494 22556 |
op_rights |
open |
op_doi |
https://doi.org/10.3389/fmicb.2019.00494 |
container_title |
Frontiers in Microbiology |
container_volume |
10 |
_version_ |
1790596275049070592 |