Effect of CO² enrichment on bacterial metabolism in an Arctic fjord
International audience The anthropogenic increase of carbon dioxide (CO 2) alters the seawater carbonate chemistry, with a decline of pH and an increase in the partial pressure of CO 2 (pCO 2). Although bacteria play a major role in carbon cycling, little is known about the impact of rising pCO 2 on...
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Online Access: | https://hal.sorbonne-universite.fr/hal-01543125 https://hal.sorbonne-universite.fr/hal-01543125/document https://hal.sorbonne-universite.fr/hal-01543125/file/bg-10-3285-2013.pdf https://doi.org/10.5194/bg-10-3285-2013 |
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ftunivnantes:oai:HAL:hal-01543125v1 2023-05-15T15:15:14+02:00 Effect of CO² enrichment on bacterial metabolism in an Arctic fjord Motegi, C. Tanaka, T. Piontek, J. Brussaard, C. P. D. Gattuso, Jean-Pierre Weinbauer, Markus Laboratoire d'océanographie de Villefranche (LOV) Observatoire océanologique de Villefranche-sur-mer (OOVM) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Helmholtz Centre for Ocean Research Kiel (GEOMAR) Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI) Royal Netherlands Institute for Sea Research (NIOZ) Institute for Biodiversity and Ecosystem Dynamics (IBED) University of Amsterdam Amsterdam (UvA) 2013 https://hal.sorbonne-universite.fr/hal-01543125 https://hal.sorbonne-universite.fr/hal-01543125/document https://hal.sorbonne-universite.fr/hal-01543125/file/bg-10-3285-2013.pdf https://doi.org/10.5194/bg-10-3285-2013 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-10-3285-2013 hal-01543125 https://hal.sorbonne-universite.fr/hal-01543125 https://hal.sorbonne-universite.fr/hal-01543125/document https://hal.sorbonne-universite.fr/hal-01543125/file/bg-10-3285-2013.pdf doi:10.5194/bg-10-3285-2013 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal.sorbonne-universite.fr/hal-01543125 Biogeosciences, 2013, 10 (5), pp.3285-3296. ⟨10.5194/bg-10-3285-2013⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems info:eu-repo/semantics/article Journal articles 2013 ftunivnantes https://doi.org/10.5194/bg-10-3285-2013 2023-02-01T01:13:40Z International audience The anthropogenic increase of carbon dioxide (CO 2) alters the seawater carbonate chemistry, with a decline of pH and an increase in the partial pressure of CO 2 (pCO 2). Although bacteria play a major role in carbon cycling, little is known about the impact of rising pCO 2 on bacterial carbon metabolism, especially for natural bacterial communities. In this study, we investigated the effect of rising pCO 2 on bacterial production (BP), bacterial respiration (BR) and bacterial carbon metabolism during a mesocosm experiment performed in Kongsfjorden (Svalbard) in 2010. Nine meso-cosms with pCO 2 levels ranging from ca. 180 to 1400 µatm were deployed in the fjord and monitored for 30 days. Generally BP gradually decreased in all mesocosms in an initial phase, showed a large (3.6-fold average) but temporary increase on day 10, and increased slightly after inorganic nutrient addition. Over the wide range of pCO 2 investigated, the patterns in BP and growth rate of bulk and free-living communities were generally similar over time. However, BP of the bulk community significantly decreased with increasing pCO 2 after nutrient addition (day 14). In addition, increasing pCO 2 enhanced the leucine to thymidine (Leu : TdR) ratio at the end of experiment, suggesting that pCO 2 may alter the growth balance of bacteria. Stepwise multiple regression analysis suggests that multiple factors, including pCO 2 , explained the changes of BP, growth rate and Leu : TdR ratio at the end of the experiment. In contrast to BP, no clear trend and effect of changes of pCO 2 was observed for BR, bacterial carbon demand and bacterial growth efficiency. Overall, the results suggest that changes in pCO 2 potentially influence bacterial production, growth rate and growth balance rather than the conversion of dissolved organic matter into CO 2 . Article in Journal/Newspaper Arctic Kongsfjord* Kongsfjorden Svalbard Université de Nantes: HAL-UNIV-NANTES Arctic Svalbard Biogeosciences 10 5 3285 3296 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems Motegi, C. Tanaka, T. Piontek, J. Brussaard, C. P. D. Gattuso, Jean-Pierre Weinbauer, Markus Effect of CO² enrichment on bacterial metabolism in an Arctic fjord |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems |
description |
International audience The anthropogenic increase of carbon dioxide (CO 2) alters the seawater carbonate chemistry, with a decline of pH and an increase in the partial pressure of CO 2 (pCO 2). Although bacteria play a major role in carbon cycling, little is known about the impact of rising pCO 2 on bacterial carbon metabolism, especially for natural bacterial communities. In this study, we investigated the effect of rising pCO 2 on bacterial production (BP), bacterial respiration (BR) and bacterial carbon metabolism during a mesocosm experiment performed in Kongsfjorden (Svalbard) in 2010. Nine meso-cosms with pCO 2 levels ranging from ca. 180 to 1400 µatm were deployed in the fjord and monitored for 30 days. Generally BP gradually decreased in all mesocosms in an initial phase, showed a large (3.6-fold average) but temporary increase on day 10, and increased slightly after inorganic nutrient addition. Over the wide range of pCO 2 investigated, the patterns in BP and growth rate of bulk and free-living communities were generally similar over time. However, BP of the bulk community significantly decreased with increasing pCO 2 after nutrient addition (day 14). In addition, increasing pCO 2 enhanced the leucine to thymidine (Leu : TdR) ratio at the end of experiment, suggesting that pCO 2 may alter the growth balance of bacteria. Stepwise multiple regression analysis suggests that multiple factors, including pCO 2 , explained the changes of BP, growth rate and Leu : TdR ratio at the end of the experiment. In contrast to BP, no clear trend and effect of changes of pCO 2 was observed for BR, bacterial carbon demand and bacterial growth efficiency. Overall, the results suggest that changes in pCO 2 potentially influence bacterial production, growth rate and growth balance rather than the conversion of dissolved organic matter into CO 2 . |
author2 |
Laboratoire d'océanographie de Villefranche (LOV) Observatoire océanologique de Villefranche-sur-mer (OOVM) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Helmholtz Centre for Ocean Research Kiel (GEOMAR) Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI) Royal Netherlands Institute for Sea Research (NIOZ) Institute for Biodiversity and Ecosystem Dynamics (IBED) University of Amsterdam Amsterdam (UvA) |
format |
Article in Journal/Newspaper |
author |
Motegi, C. Tanaka, T. Piontek, J. Brussaard, C. P. D. Gattuso, Jean-Pierre Weinbauer, Markus |
author_facet |
Motegi, C. Tanaka, T. Piontek, J. Brussaard, C. P. D. Gattuso, Jean-Pierre Weinbauer, Markus |
author_sort |
Motegi, C. |
title |
Effect of CO² enrichment on bacterial metabolism in an Arctic fjord |
title_short |
Effect of CO² enrichment on bacterial metabolism in an Arctic fjord |
title_full |
Effect of CO² enrichment on bacterial metabolism in an Arctic fjord |
title_fullStr |
Effect of CO² enrichment on bacterial metabolism in an Arctic fjord |
title_full_unstemmed |
Effect of CO² enrichment on bacterial metabolism in an Arctic fjord |
title_sort |
effect of co² enrichment on bacterial metabolism in an arctic fjord |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://hal.sorbonne-universite.fr/hal-01543125 https://hal.sorbonne-universite.fr/hal-01543125/document https://hal.sorbonne-universite.fr/hal-01543125/file/bg-10-3285-2013.pdf https://doi.org/10.5194/bg-10-3285-2013 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Kongsfjord* Kongsfjorden Svalbard |
genre_facet |
Arctic Kongsfjord* Kongsfjorden Svalbard |
op_source |
ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal.sorbonne-universite.fr/hal-01543125 Biogeosciences, 2013, 10 (5), pp.3285-3296. ⟨10.5194/bg-10-3285-2013⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-10-3285-2013 hal-01543125 https://hal.sorbonne-universite.fr/hal-01543125 https://hal.sorbonne-universite.fr/hal-01543125/document https://hal.sorbonne-universite.fr/hal-01543125/file/bg-10-3285-2013.pdf doi:10.5194/bg-10-3285-2013 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/bg-10-3285-2013 |
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Biogeosciences |
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10 |
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5 |
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