Effect of Ocean Acidification on Bacterial Metabolic Activity and Community Composition in Oligotrophic Oceans, Inferred From Short-Term Bioassays
Increasing anthropogenic CO 2 emissions in recent decades cause ocean acidification (OA), affecting carbon cycling in oceans by regulating eco-physiological processes of plankton. Heterotrophic bacteria play an important role in carbon cycling in oceans. However, the effect of OA on bacteria in ocea...
Published in: | Frontiers in Microbiology |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Frontiers Media SA
2021
|
Subjects: | |
Online Access: | http://dx.doi.org/10.3389/fmicb.2021.583982 https://www.frontiersin.org/articles/10.3389/fmicb.2021.583982/full |
id |
crfrontiers:10.3389/fmicb.2021.583982 |
---|---|
record_format |
openpolar |
spelling |
crfrontiers:10.3389/fmicb.2021.583982 2024-06-23T07:55:50+00:00 Effect of Ocean Acidification on Bacterial Metabolic Activity and Community Composition in Oligotrophic Oceans, Inferred From Short-Term Bioassays Hu, Caiqin Li, Xiangfu He, Maoqiu Jiang, Peng Long, Aimin Xu, Jie 2021 http://dx.doi.org/10.3389/fmicb.2021.583982 https://www.frontiersin.org/articles/10.3389/fmicb.2021.583982/full unknown Frontiers Media SA https://creativecommons.org/licenses/by/4.0/ Frontiers in Microbiology volume 12 ISSN 1664-302X journal-article 2021 crfrontiers https://doi.org/10.3389/fmicb.2021.583982 2024-06-04T05:52:13Z Increasing anthropogenic CO 2 emissions in recent decades cause ocean acidification (OA), affecting carbon cycling in oceans by regulating eco-physiological processes of plankton. Heterotrophic bacteria play an important role in carbon cycling in oceans. However, the effect of OA on bacteria in oceans, especially in oligotrophic regions, was not well understood. In our study, the response of bacterial metabolic activity and community composition to OA was assessed by determining bacterial production, respiration, and community composition at the low- p CO 2 (400 ppm) and high- p CO 2 (800 ppm) treatments over the short term at two oligotrophic stations in the northern South China Sea. Bacterial production decreased significantly by 17.1–37.1 % in response to OA, since bacteria with high nucleic acid content preferentially were repressed by OA, which was less abundant under high- p CO 2 treatment. Correspondingly, shifts in bacterial community composition occurred in response to OA, with a high fraction of the small-sized bacteria and high bacterial species diversity in a high- p CO 2 scenario at K11. Bacterial respiration responded to OA differently at both stations, most likely attributed to different physiological responses of the bacterial community to OA. OA mitigated bacterial growth efficiency, and consequently, a larger fraction of DOC entering microbial loops was transferred to CO 2 . Article in Journal/Newspaper Ocean acidification Frontiers (Publisher) Frontiers in Microbiology 12 |
institution |
Open Polar |
collection |
Frontiers (Publisher) |
op_collection_id |
crfrontiers |
language |
unknown |
description |
Increasing anthropogenic CO 2 emissions in recent decades cause ocean acidification (OA), affecting carbon cycling in oceans by regulating eco-physiological processes of plankton. Heterotrophic bacteria play an important role in carbon cycling in oceans. However, the effect of OA on bacteria in oceans, especially in oligotrophic regions, was not well understood. In our study, the response of bacterial metabolic activity and community composition to OA was assessed by determining bacterial production, respiration, and community composition at the low- p CO 2 (400 ppm) and high- p CO 2 (800 ppm) treatments over the short term at two oligotrophic stations in the northern South China Sea. Bacterial production decreased significantly by 17.1–37.1 % in response to OA, since bacteria with high nucleic acid content preferentially were repressed by OA, which was less abundant under high- p CO 2 treatment. Correspondingly, shifts in bacterial community composition occurred in response to OA, with a high fraction of the small-sized bacteria and high bacterial species diversity in a high- p CO 2 scenario at K11. Bacterial respiration responded to OA differently at both stations, most likely attributed to different physiological responses of the bacterial community to OA. OA mitigated bacterial growth efficiency, and consequently, a larger fraction of DOC entering microbial loops was transferred to CO 2 . |
format |
Article in Journal/Newspaper |
author |
Hu, Caiqin Li, Xiangfu He, Maoqiu Jiang, Peng Long, Aimin Xu, Jie |
spellingShingle |
Hu, Caiqin Li, Xiangfu He, Maoqiu Jiang, Peng Long, Aimin Xu, Jie Effect of Ocean Acidification on Bacterial Metabolic Activity and Community Composition in Oligotrophic Oceans, Inferred From Short-Term Bioassays |
author_facet |
Hu, Caiqin Li, Xiangfu He, Maoqiu Jiang, Peng Long, Aimin Xu, Jie |
author_sort |
Hu, Caiqin |
title |
Effect of Ocean Acidification on Bacterial Metabolic Activity and Community Composition in Oligotrophic Oceans, Inferred From Short-Term Bioassays |
title_short |
Effect of Ocean Acidification on Bacterial Metabolic Activity and Community Composition in Oligotrophic Oceans, Inferred From Short-Term Bioassays |
title_full |
Effect of Ocean Acidification on Bacterial Metabolic Activity and Community Composition in Oligotrophic Oceans, Inferred From Short-Term Bioassays |
title_fullStr |
Effect of Ocean Acidification on Bacterial Metabolic Activity and Community Composition in Oligotrophic Oceans, Inferred From Short-Term Bioassays |
title_full_unstemmed |
Effect of Ocean Acidification on Bacterial Metabolic Activity and Community Composition in Oligotrophic Oceans, Inferred From Short-Term Bioassays |
title_sort |
effect of ocean acidification on bacterial metabolic activity and community composition in oligotrophic oceans, inferred from short-term bioassays |
publisher |
Frontiers Media SA |
publishDate |
2021 |
url |
http://dx.doi.org/10.3389/fmicb.2021.583982 https://www.frontiersin.org/articles/10.3389/fmicb.2021.583982/full |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Frontiers in Microbiology volume 12 ISSN 1664-302X |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3389/fmicb.2021.583982 |
container_title |
Frontiers in Microbiology |
container_volume |
12 |
_version_ |
1802648555815436288 |