Ocean acidification impacts bacteria–phytoplankton coupling at low-nutrient conditions
The oceans absorb about a quarter of the annually produced anthropogenic atmospheric carbon dioxide (CO2), resulting in a decrease in surface water pH, a process termed ocean acidification (OA). Surprisingly little is known about how OA affects the physiology of heterotrophic bacteria or the couplin...
Published in: | Biogeosciences |
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Copernicus Publications (EGU)
2017
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Online Access: | https://oceanrep.geomar.de/id/eprint/31886/ https://oceanrep.geomar.de/id/eprint/31886/1/bg-14-1-2017-1.pdf https://oceanrep.geomar.de/id/eprint/31886/2/bg-14-1-2017-supplement.pdf https://doi.org/10.5194/bg-14-1-2017 |
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ftoceanrep:oai:oceanrep.geomar.de:31886 2023-05-15T17:50:51+02:00 Ocean acidification impacts bacteria–phytoplankton coupling at low-nutrient conditions Hornick, Thomas Bach, Lennart T. Crawfurd, Katharine J. Spilling, Kristian Achterberg, Eric P. Woodhouse, Jason N. Schulz, Kai G. Brussaard, Corina P. D. Riebesell, Ulf Grossart, Hans-Peter 2017-01-02 text https://oceanrep.geomar.de/id/eprint/31886/ https://oceanrep.geomar.de/id/eprint/31886/1/bg-14-1-2017-1.pdf https://oceanrep.geomar.de/id/eprint/31886/2/bg-14-1-2017-supplement.pdf https://doi.org/10.5194/bg-14-1-2017 en eng Copernicus Publications (EGU) https://oceanrep.geomar.de/id/eprint/31886/1/bg-14-1-2017-1.pdf https://oceanrep.geomar.de/id/eprint/31886/2/bg-14-1-2017-supplement.pdf Hornick, T., Bach, L. T. , Crawfurd, K. J., Spilling, K., Achterberg, E. P. , Woodhouse, J. N., Schulz, K. G., Brussaard, C. P. D., Riebesell, U. and Grossart, H. P. (2017) Ocean acidification impacts bacteria–phytoplankton coupling at low-nutrient conditions. Open Access Biogeosciences (BG), 14 . pp. 1-15. DOI 10.5194/bg-14-1-2017 <https://doi.org/10.5194/bg-14-1-2017>. doi:10.5194/bg-14-1-2017 cc_by_3.0 info:eu-repo/semantics/openAccess Article PeerReviewed info:eu-repo/semantics/article 2017 ftoceanrep https://doi.org/10.5194/bg-14-1-2017 2023-04-07T15:24:35Z The oceans absorb about a quarter of the annually produced anthropogenic atmospheric carbon dioxide (CO2), resulting in a decrease in surface water pH, a process termed ocean acidification (OA). Surprisingly little is known about how OA affects the physiology of heterotrophic bacteria or the coupling of heterotrophic bacteria to phytoplankton when nutrients are limited. Previous experiments were, for the most part, undertaken during productive phases or following nutrient additions designed to stimulate algal blooms. Therefore, we performed an in situ large-volume mesocosm ( ∼ 55 m3) experiment in the Baltic Sea by simulating different fugacities of CO2 (fCO2) extending from present to future conditions. The study was conducted in July–August after the nominal spring bloom, in order to maintain low-nutrient conditions throughout the experiment. This resulted in phytoplankton communities dominated by small-sized functional groups (picophytoplankton). There was no consistent fCO2-induced effect on bacterial protein production (BPP), cell-specific BPP (csBPP) or biovolumes (BVs) of either free-living (FL) or particle-associated (PA) heterotrophic bacteria, when considered as individual components (univariate analyses). Permutational Multivariate Analysis of Variance (PERMANOVA) revealed a significant effect of the fCO2 treatment on entire assemblages of dissolved and particulate nutrients, metabolic parameters and the bacteria–phytoplankton community. However, distance-based linear modelling only identified fCO2 as a factor explaining the variability observed amongst the microbial community composition, but not for explaining variability within the metabolic parameters. This suggests that fCO2 impacts on microbial metabolic parameters occurred indirectly through varying physicochemical parameters and microbial species composition. Cluster analyses examining the co-occurrence of different functional groups of bacteria and phytoplankton further revealed a separation of the four fCO2-treated mesocosms from both ... Article in Journal/Newspaper Ocean acidification OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Biogeosciences 14 1 1 15 |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
The oceans absorb about a quarter of the annually produced anthropogenic atmospheric carbon dioxide (CO2), resulting in a decrease in surface water pH, a process termed ocean acidification (OA). Surprisingly little is known about how OA affects the physiology of heterotrophic bacteria or the coupling of heterotrophic bacteria to phytoplankton when nutrients are limited. Previous experiments were, for the most part, undertaken during productive phases or following nutrient additions designed to stimulate algal blooms. Therefore, we performed an in situ large-volume mesocosm ( ∼ 55 m3) experiment in the Baltic Sea by simulating different fugacities of CO2 (fCO2) extending from present to future conditions. The study was conducted in July–August after the nominal spring bloom, in order to maintain low-nutrient conditions throughout the experiment. This resulted in phytoplankton communities dominated by small-sized functional groups (picophytoplankton). There was no consistent fCO2-induced effect on bacterial protein production (BPP), cell-specific BPP (csBPP) or biovolumes (BVs) of either free-living (FL) or particle-associated (PA) heterotrophic bacteria, when considered as individual components (univariate analyses). Permutational Multivariate Analysis of Variance (PERMANOVA) revealed a significant effect of the fCO2 treatment on entire assemblages of dissolved and particulate nutrients, metabolic parameters and the bacteria–phytoplankton community. However, distance-based linear modelling only identified fCO2 as a factor explaining the variability observed amongst the microbial community composition, but not for explaining variability within the metabolic parameters. This suggests that fCO2 impacts on microbial metabolic parameters occurred indirectly through varying physicochemical parameters and microbial species composition. Cluster analyses examining the co-occurrence of different functional groups of bacteria and phytoplankton further revealed a separation of the four fCO2-treated mesocosms from both ... |
format |
Article in Journal/Newspaper |
author |
Hornick, Thomas Bach, Lennart T. Crawfurd, Katharine J. Spilling, Kristian Achterberg, Eric P. Woodhouse, Jason N. Schulz, Kai G. Brussaard, Corina P. D. Riebesell, Ulf Grossart, Hans-Peter |
spellingShingle |
Hornick, Thomas Bach, Lennart T. Crawfurd, Katharine J. Spilling, Kristian Achterberg, Eric P. Woodhouse, Jason N. Schulz, Kai G. Brussaard, Corina P. D. Riebesell, Ulf Grossart, Hans-Peter Ocean acidification impacts bacteria–phytoplankton coupling at low-nutrient conditions |
author_facet |
Hornick, Thomas Bach, Lennart T. Crawfurd, Katharine J. Spilling, Kristian Achterberg, Eric P. Woodhouse, Jason N. Schulz, Kai G. Brussaard, Corina P. D. Riebesell, Ulf Grossart, Hans-Peter |
author_sort |
Hornick, Thomas |
title |
Ocean acidification impacts bacteria–phytoplankton coupling at low-nutrient conditions |
title_short |
Ocean acidification impacts bacteria–phytoplankton coupling at low-nutrient conditions |
title_full |
Ocean acidification impacts bacteria–phytoplankton coupling at low-nutrient conditions |
title_fullStr |
Ocean acidification impacts bacteria–phytoplankton coupling at low-nutrient conditions |
title_full_unstemmed |
Ocean acidification impacts bacteria–phytoplankton coupling at low-nutrient conditions |
title_sort |
ocean acidification impacts bacteria–phytoplankton coupling at low-nutrient conditions |
publisher |
Copernicus Publications (EGU) |
publishDate |
2017 |
url |
https://oceanrep.geomar.de/id/eprint/31886/ https://oceanrep.geomar.de/id/eprint/31886/1/bg-14-1-2017-1.pdf https://oceanrep.geomar.de/id/eprint/31886/2/bg-14-1-2017-supplement.pdf https://doi.org/10.5194/bg-14-1-2017 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
https://oceanrep.geomar.de/id/eprint/31886/1/bg-14-1-2017-1.pdf https://oceanrep.geomar.de/id/eprint/31886/2/bg-14-1-2017-supplement.pdf Hornick, T., Bach, L. T. , Crawfurd, K. J., Spilling, K., Achterberg, E. P. , Woodhouse, J. N., Schulz, K. G., Brussaard, C. P. D., Riebesell, U. and Grossart, H. P. (2017) Ocean acidification impacts bacteria–phytoplankton coupling at low-nutrient conditions. Open Access Biogeosciences (BG), 14 . pp. 1-15. DOI 10.5194/bg-14-1-2017 <https://doi.org/10.5194/bg-14-1-2017>. doi:10.5194/bg-14-1-2017 |
op_rights |
cc_by_3.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bg-14-1-2017 |
container_title |
Biogeosciences |
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14 |
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1 |
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1 |
op_container_end_page |
15 |
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1766157764939218944 |