Hypoxia-Enhanced N2O Production Under Ocean Acidification in the Bohai Sea
Nitrous oxide (N2O) is a powerful greenhouse gas that degrades ozone. Hypoxia and ocean acidification are becoming more intense as a result of climate change. The former stimulates N2O emissions, whereas the effects of the latter on N2O production vary by the ocean. Hypoxia and ocean acidification m...
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ftdoajarticles:oai:doaj.org/article:d6252a6a783d4024b64a9e957cbf3ac7 2023-05-15T17:48:52+02:00 Hypoxia-Enhanced N2O Production Under Ocean Acidification in the Bohai Sea Ting Gu Dai Jia Xing Ma Liying Peng Guicheng Zhang Yuqiu Wei Tingting Lou Jun Sun 2021-07-01T00:00:00Z https://doi.org/10.3389/fmars.2021.695105 https://doaj.org/article/d6252a6a783d4024b64a9e957cbf3ac7 EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fmars.2021.695105/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2021.695105 https://doaj.org/article/d6252a6a783d4024b64a9e957cbf3ac7 Frontiers in Marine Science, Vol 8 (2021) ocean acidification hypoxia N2O emission Bohai Sea oxygen minimum zone Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2021 ftdoajarticles https://doi.org/10.3389/fmars.2021.695105 2022-12-31T06:38:14Z Nitrous oxide (N2O) is a powerful greenhouse gas that degrades ozone. Hypoxia and ocean acidification are becoming more intense as a result of climate change. The former stimulates N2O emissions, whereas the effects of the latter on N2O production vary by the ocean. Hypoxia and ocean acidification may play a critical role in the evolution of future oceanic N2O production. However, the interactive effects of hypoxia and ocean acidification on N2O production remain unclear. We conducted a research cruise in the Bohai Sea of China to assess the occurrence of ocean acidification in the seasonal oxygen minimum zone of the sea and further conducted laboratory incubation experiments to determine the effects of ocean acidification and hypoxia on N2O production. When pH decreased by 0.25, N2O production decreased by 50.77 and 72.38%, respectively. In contrast, hypoxia had a positive impact; when dissolved oxygen (DO) decreased to 3.7 and 2.4 mg L−1, N2O production increased by 49.72 and 278.68%, respectively. The incubation experiments demonstrated that the coupling of ocean acidification and hypoxia significantly increased N2O production, but, individually, there was an antagonistic relationship between the two. Structural equation modeling showed that the total effects of hypoxia treatment on N2O production changes weakened the effects of ocean acidification, with overall positive effects. Generally speaking, our results suggest that N2O production from the coastal waters of the Bohai Sea may increase under future climate change scenarios due to increasingly serious ocean acidification and hypoxia working in combination. Article in Journal/Newspaper Ocean acidification Directory of Open Access Journals: DOAJ Articles Frontiers in Marine Science 8 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
ocean acidification hypoxia N2O emission Bohai Sea oxygen minimum zone Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
ocean acidification hypoxia N2O emission Bohai Sea oxygen minimum zone Science Q General. Including nature conservation geographical distribution QH1-199.5 Ting Gu Dai Jia Xing Ma Liying Peng Guicheng Zhang Yuqiu Wei Tingting Lou Jun Sun Hypoxia-Enhanced N2O Production Under Ocean Acidification in the Bohai Sea |
topic_facet |
ocean acidification hypoxia N2O emission Bohai Sea oxygen minimum zone Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
Nitrous oxide (N2O) is a powerful greenhouse gas that degrades ozone. Hypoxia and ocean acidification are becoming more intense as a result of climate change. The former stimulates N2O emissions, whereas the effects of the latter on N2O production vary by the ocean. Hypoxia and ocean acidification may play a critical role in the evolution of future oceanic N2O production. However, the interactive effects of hypoxia and ocean acidification on N2O production remain unclear. We conducted a research cruise in the Bohai Sea of China to assess the occurrence of ocean acidification in the seasonal oxygen minimum zone of the sea and further conducted laboratory incubation experiments to determine the effects of ocean acidification and hypoxia on N2O production. When pH decreased by 0.25, N2O production decreased by 50.77 and 72.38%, respectively. In contrast, hypoxia had a positive impact; when dissolved oxygen (DO) decreased to 3.7 and 2.4 mg L−1, N2O production increased by 49.72 and 278.68%, respectively. The incubation experiments demonstrated that the coupling of ocean acidification and hypoxia significantly increased N2O production, but, individually, there was an antagonistic relationship between the two. Structural equation modeling showed that the total effects of hypoxia treatment on N2O production changes weakened the effects of ocean acidification, with overall positive effects. Generally speaking, our results suggest that N2O production from the coastal waters of the Bohai Sea may increase under future climate change scenarios due to increasingly serious ocean acidification and hypoxia working in combination. |
format |
Article in Journal/Newspaper |
author |
Ting Gu Dai Jia Xing Ma Liying Peng Guicheng Zhang Yuqiu Wei Tingting Lou Jun Sun |
author_facet |
Ting Gu Dai Jia Xing Ma Liying Peng Guicheng Zhang Yuqiu Wei Tingting Lou Jun Sun |
author_sort |
Ting Gu |
title |
Hypoxia-Enhanced N2O Production Under Ocean Acidification in the Bohai Sea |
title_short |
Hypoxia-Enhanced N2O Production Under Ocean Acidification in the Bohai Sea |
title_full |
Hypoxia-Enhanced N2O Production Under Ocean Acidification in the Bohai Sea |
title_fullStr |
Hypoxia-Enhanced N2O Production Under Ocean Acidification in the Bohai Sea |
title_full_unstemmed |
Hypoxia-Enhanced N2O Production Under Ocean Acidification in the Bohai Sea |
title_sort |
hypoxia-enhanced n2o production under ocean acidification in the bohai sea |
publisher |
Frontiers Media S.A. |
publishDate |
2021 |
url |
https://doi.org/10.3389/fmars.2021.695105 https://doaj.org/article/d6252a6a783d4024b64a9e957cbf3ac7 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Frontiers in Marine Science, Vol 8 (2021) |
op_relation |
https://www.frontiersin.org/articles/10.3389/fmars.2021.695105/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2021.695105 https://doaj.org/article/d6252a6a783d4024b64a9e957cbf3ac7 |
op_doi |
https://doi.org/10.3389/fmars.2021.695105 |
container_title |
Frontiers in Marine Science |
container_volume |
8 |
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1766155036228845568 |