Bacterial Metabolic Response to Change in Phytoplankton Communities and Resultant Effects on Carbon Cycles in the Amundsen Sea Polynya, Antarctica
We investigated changes in heterotrophic bacterial metabolic activities and associated carbon cycles in response to a change in dominant phytoplankton communities during two contrasting environmental conditions in austral summer in the Amundsen Sea polynya (ASP), Antarctica: the closed polynya condi...
Published in: | Frontiers in Marine Science |
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Language: | English |
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Frontiers Media S.A.
2022
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Online Access: | https://doi.org/10.3389/fmars.2022.872052 https://doaj.org/article/67cff135a5aa4033a4b57301c5ddf339 |
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ftdoajarticles:oai:doaj.org/article:67cff135a5aa4033a4b57301c5ddf339 2023-05-15T13:23:49+02:00 Bacterial Metabolic Response to Change in Phytoplankton Communities and Resultant Effects on Carbon Cycles in the Amundsen Sea Polynya, Antarctica Bomina Kim Sung-Han Kim Jun-Oh Min Youngju Lee Jinyoung Jung Tae-Wan Kim Jae Seong Lee Eun Jin Yang Jisoo Park SangHoon Lee Jung-Ho Hyun 2022-06-01T00:00:00Z https://doi.org/10.3389/fmars.2022.872052 https://doaj.org/article/67cff135a5aa4033a4b57301c5ddf339 EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fmars.2022.872052/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2022.872052 https://doaj.org/article/67cff135a5aa4033a4b57301c5ddf339 Frontiers in Marine Science, Vol 9 (2022) bacterial production bacterial respiration phytoplankton community composition microbial loop biological pump Amundsen Sea polynya Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2022 ftdoajarticles https://doi.org/10.3389/fmars.2022.872052 2022-12-31T02:02:29Z We investigated changes in heterotrophic bacterial metabolic activities and associated carbon cycles in response to a change in dominant phytoplankton communities during two contrasting environmental conditions in austral summer in the Amundsen Sea polynya (ASP), Antarctica: the closed polynya condition in 2014 (ANA04) and the open polynya condition in 2016 (ANA06). In ANA04, Phaeocystis antarctica predominated phytoplankton biomass, comprising 78% of total phytoplankton carbon biomass, whereas diatoms and Dictyocha speculum accounted for 45% and 48% of total phytoplankton carbon biomass, respectively, in ANA06. Bacterial production (BP) showed a significant positive correlation with only chlorophyll-a (Chl-a, rho = 0.66, p < 0.001) in P. antarctica-dominated ANA04, whereas there were significant positive relationships of BP with various organic carbon pools, such as chromophoric dissolved organic matter (CDOM, rho = 0.84, p < 0.001), Chl-a (rho = 0.59, p < 0.001), and dissolved organic carbon (DOC, rho = 0.51, p = 0.001), in ANA06 when diatoms and D. speculum co-dominated. These results indicate that BP depended more on DOC directly released from P. antarctica in ANA04, but was supported by DOC derived from various food web processes in the diatom-dominated system in ANA06. The BP to primary production (BP : PP) ratio was three-fold higher in P. antarctica-dominated ANA04 (BP: PP = 0.09), than in diatom- and D. speculum-co-dominated ANA06 (BP : PP = 0.03). These results suggested that the microbial loop is more significant in Phaeocystis-dominated conditions than in diatom-dominated conditions. In addition, the decreases in BP : PP ratio and bacterial respiration with increasing diatom proportion in the surface mixed layer indicated that the change from P. antarctica to diatom predominance enhanced biological carbon pump function by increasing particulate organic carbon export efficiency. Consequently, our results suggest that bacterial metabolic response to shifts in phytoplankton communities could ... Article in Journal/Newspaper Amundsen Sea Antarc* Antarctica Directory of Open Access Journals: DOAJ Articles Austral Amundsen Sea Rho ENVELOPE(-63.000,-63.000,-64.300,-64.300) Frontiers in Marine Science 9 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
bacterial production bacterial respiration phytoplankton community composition microbial loop biological pump Amundsen Sea polynya Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
bacterial production bacterial respiration phytoplankton community composition microbial loop biological pump Amundsen Sea polynya Science Q General. Including nature conservation geographical distribution QH1-199.5 Bomina Kim Sung-Han Kim Jun-Oh Min Youngju Lee Jinyoung Jung Tae-Wan Kim Jae Seong Lee Eun Jin Yang Jisoo Park SangHoon Lee Jung-Ho Hyun Bacterial Metabolic Response to Change in Phytoplankton Communities and Resultant Effects on Carbon Cycles in the Amundsen Sea Polynya, Antarctica |
topic_facet |
bacterial production bacterial respiration phytoplankton community composition microbial loop biological pump Amundsen Sea polynya Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
We investigated changes in heterotrophic bacterial metabolic activities and associated carbon cycles in response to a change in dominant phytoplankton communities during two contrasting environmental conditions in austral summer in the Amundsen Sea polynya (ASP), Antarctica: the closed polynya condition in 2014 (ANA04) and the open polynya condition in 2016 (ANA06). In ANA04, Phaeocystis antarctica predominated phytoplankton biomass, comprising 78% of total phytoplankton carbon biomass, whereas diatoms and Dictyocha speculum accounted for 45% and 48% of total phytoplankton carbon biomass, respectively, in ANA06. Bacterial production (BP) showed a significant positive correlation with only chlorophyll-a (Chl-a, rho = 0.66, p < 0.001) in P. antarctica-dominated ANA04, whereas there were significant positive relationships of BP with various organic carbon pools, such as chromophoric dissolved organic matter (CDOM, rho = 0.84, p < 0.001), Chl-a (rho = 0.59, p < 0.001), and dissolved organic carbon (DOC, rho = 0.51, p = 0.001), in ANA06 when diatoms and D. speculum co-dominated. These results indicate that BP depended more on DOC directly released from P. antarctica in ANA04, but was supported by DOC derived from various food web processes in the diatom-dominated system in ANA06. The BP to primary production (BP : PP) ratio was three-fold higher in P. antarctica-dominated ANA04 (BP: PP = 0.09), than in diatom- and D. speculum-co-dominated ANA06 (BP : PP = 0.03). These results suggested that the microbial loop is more significant in Phaeocystis-dominated conditions than in diatom-dominated conditions. In addition, the decreases in BP : PP ratio and bacterial respiration with increasing diatom proportion in the surface mixed layer indicated that the change from P. antarctica to diatom predominance enhanced biological carbon pump function by increasing particulate organic carbon export efficiency. Consequently, our results suggest that bacterial metabolic response to shifts in phytoplankton communities could ... |
format |
Article in Journal/Newspaper |
author |
Bomina Kim Sung-Han Kim Jun-Oh Min Youngju Lee Jinyoung Jung Tae-Wan Kim Jae Seong Lee Eun Jin Yang Jisoo Park SangHoon Lee Jung-Ho Hyun |
author_facet |
Bomina Kim Sung-Han Kim Jun-Oh Min Youngju Lee Jinyoung Jung Tae-Wan Kim Jae Seong Lee Eun Jin Yang Jisoo Park SangHoon Lee Jung-Ho Hyun |
author_sort |
Bomina Kim |
title |
Bacterial Metabolic Response to Change in Phytoplankton Communities and Resultant Effects on Carbon Cycles in the Amundsen Sea Polynya, Antarctica |
title_short |
Bacterial Metabolic Response to Change in Phytoplankton Communities and Resultant Effects on Carbon Cycles in the Amundsen Sea Polynya, Antarctica |
title_full |
Bacterial Metabolic Response to Change in Phytoplankton Communities and Resultant Effects on Carbon Cycles in the Amundsen Sea Polynya, Antarctica |
title_fullStr |
Bacterial Metabolic Response to Change in Phytoplankton Communities and Resultant Effects on Carbon Cycles in the Amundsen Sea Polynya, Antarctica |
title_full_unstemmed |
Bacterial Metabolic Response to Change in Phytoplankton Communities and Resultant Effects on Carbon Cycles in the Amundsen Sea Polynya, Antarctica |
title_sort |
bacterial metabolic response to change in phytoplankton communities and resultant effects on carbon cycles in the amundsen sea polynya, antarctica |
publisher |
Frontiers Media S.A. |
publishDate |
2022 |
url |
https://doi.org/10.3389/fmars.2022.872052 https://doaj.org/article/67cff135a5aa4033a4b57301c5ddf339 |
long_lat |
ENVELOPE(-63.000,-63.000,-64.300,-64.300) |
geographic |
Austral Amundsen Sea Rho |
geographic_facet |
Austral Amundsen Sea Rho |
genre |
Amundsen Sea Antarc* Antarctica |
genre_facet |
Amundsen Sea Antarc* Antarctica |
op_source |
Frontiers in Marine Science, Vol 9 (2022) |
op_relation |
https://www.frontiersin.org/articles/10.3389/fmars.2022.872052/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2022.872052 https://doaj.org/article/67cff135a5aa4033a4b57301c5ddf339 |
op_doi |
https://doi.org/10.3389/fmars.2022.872052 |
container_title |
Frontiers in Marine Science |
container_volume |
9 |
_version_ |
1766375643819278336 |