Assessing impacts of coastal warming, acidification, and deoxygenation on Pacific oyster (Crassostrea gigas) farming: a case study in the Hinase area, Okayama Prefecture, and Shizugawa Bay, Miyagi Prefecture, Japan
Coastal warming, acidification, and deoxygenation are progressing primarily due to the increase in anthropogenic CO 2 . Coastal acidification has been reported to have effects that are anticipated to become more severe as acidification progresses, including inhibiting the formation of shells of calc...
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ftcopernicus:oai:publications.copernicus.org:bg107863 2023-12-24T10:16:05+01:00 Assessing impacts of coastal warming, acidification, and deoxygenation on Pacific oyster (Crassostrea gigas) farming: a case study in the Hinase area, Okayama Prefecture, and Shizugawa Bay, Miyagi Prefecture, Japan Fujii, Masahiko Hamanoue, Ryuji Bernardo, Lawrence Patrick Cases Ono, Tsuneo Dazai, Akihiro Oomoto, Shigeyuki Wakita, Masahide Tanaka, Takehiro 2023-11-20 application/pdf https://doi.org/10.5194/bg-20-4527-2023 https://bg.copernicus.org/articles/20/4527/2023/ eng eng doi:10.5194/bg-20-4527-2023 https://bg.copernicus.org/articles/20/4527/2023/ eISSN: 1726-4189 Text 2023 ftcopernicus https://doi.org/10.5194/bg-20-4527-2023 2023-11-27T17:24:17Z Coastal warming, acidification, and deoxygenation are progressing primarily due to the increase in anthropogenic CO 2 . Coastal acidification has been reported to have effects that are anticipated to become more severe as acidification progresses, including inhibiting the formation of shells of calcifying organisms such as shellfish, which include Pacific oysters ( Crassostrea gigas ), one of the most important aquaculture resources in Japan. Moreover, there is concern regarding the combined impacts of coastal warming, acidification, and deoxygenation on Pacific oysters. However, spatiotemporal variations in acidification and deoxygenation indicators such as pH, the aragonite saturation state ( Ω arag ), and dissolved oxygen have not been observed and projected in oceanic Pacific oyster farms in Japan. To assess the present impacts and project future impacts of coastal warming, acidification, and deoxygenation on Pacific oysters, we performed continuous in situ monitoring, numerical modeling, and microscopic examination of Pacific oyster larvae in the Hinase area of Okayama Prefecture and Shizugawa Bay in Miyagi Prefecture, Japan, both of which are famous for their Pacific oyster farms. Our monitoring results first found Ω arag values lower than the critical level of acidification for Pacific oyster larvae in Hinase, although no impact of acidification on larvae was identified by microscopic examination. Our modeling results suggest that Pacific oyster larvae are anticipated to be affected more seriously by the combined impacts of coastal warming and acidification, with lower pH and Ω arag values and a prolonged spawning period, which may shorten the oyster shipping period and lower the quality of oysters. Text Crassostrea gigas Pacific oyster Copernicus Publications: E-Journals Pacific Biogeosciences 20 22 4527 4549 |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
Coastal warming, acidification, and deoxygenation are progressing primarily due to the increase in anthropogenic CO 2 . Coastal acidification has been reported to have effects that are anticipated to become more severe as acidification progresses, including inhibiting the formation of shells of calcifying organisms such as shellfish, which include Pacific oysters ( Crassostrea gigas ), one of the most important aquaculture resources in Japan. Moreover, there is concern regarding the combined impacts of coastal warming, acidification, and deoxygenation on Pacific oysters. However, spatiotemporal variations in acidification and deoxygenation indicators such as pH, the aragonite saturation state ( Ω arag ), and dissolved oxygen have not been observed and projected in oceanic Pacific oyster farms in Japan. To assess the present impacts and project future impacts of coastal warming, acidification, and deoxygenation on Pacific oysters, we performed continuous in situ monitoring, numerical modeling, and microscopic examination of Pacific oyster larvae in the Hinase area of Okayama Prefecture and Shizugawa Bay in Miyagi Prefecture, Japan, both of which are famous for their Pacific oyster farms. Our monitoring results first found Ω arag values lower than the critical level of acidification for Pacific oyster larvae in Hinase, although no impact of acidification on larvae was identified by microscopic examination. Our modeling results suggest that Pacific oyster larvae are anticipated to be affected more seriously by the combined impacts of coastal warming and acidification, with lower pH and Ω arag values and a prolonged spawning period, which may shorten the oyster shipping period and lower the quality of oysters. |
format |
Text |
author |
Fujii, Masahiko Hamanoue, Ryuji Bernardo, Lawrence Patrick Cases Ono, Tsuneo Dazai, Akihiro Oomoto, Shigeyuki Wakita, Masahide Tanaka, Takehiro |
spellingShingle |
Fujii, Masahiko Hamanoue, Ryuji Bernardo, Lawrence Patrick Cases Ono, Tsuneo Dazai, Akihiro Oomoto, Shigeyuki Wakita, Masahide Tanaka, Takehiro Assessing impacts of coastal warming, acidification, and deoxygenation on Pacific oyster (Crassostrea gigas) farming: a case study in the Hinase area, Okayama Prefecture, and Shizugawa Bay, Miyagi Prefecture, Japan |
author_facet |
Fujii, Masahiko Hamanoue, Ryuji Bernardo, Lawrence Patrick Cases Ono, Tsuneo Dazai, Akihiro Oomoto, Shigeyuki Wakita, Masahide Tanaka, Takehiro |
author_sort |
Fujii, Masahiko |
title |
Assessing impacts of coastal warming, acidification, and deoxygenation on Pacific oyster (Crassostrea gigas) farming: a case study in the Hinase area, Okayama Prefecture, and Shizugawa Bay, Miyagi Prefecture, Japan |
title_short |
Assessing impacts of coastal warming, acidification, and deoxygenation on Pacific oyster (Crassostrea gigas) farming: a case study in the Hinase area, Okayama Prefecture, and Shizugawa Bay, Miyagi Prefecture, Japan |
title_full |
Assessing impacts of coastal warming, acidification, and deoxygenation on Pacific oyster (Crassostrea gigas) farming: a case study in the Hinase area, Okayama Prefecture, and Shizugawa Bay, Miyagi Prefecture, Japan |
title_fullStr |
Assessing impacts of coastal warming, acidification, and deoxygenation on Pacific oyster (Crassostrea gigas) farming: a case study in the Hinase area, Okayama Prefecture, and Shizugawa Bay, Miyagi Prefecture, Japan |
title_full_unstemmed |
Assessing impacts of coastal warming, acidification, and deoxygenation on Pacific oyster (Crassostrea gigas) farming: a case study in the Hinase area, Okayama Prefecture, and Shizugawa Bay, Miyagi Prefecture, Japan |
title_sort |
assessing impacts of coastal warming, acidification, and deoxygenation on pacific oyster (crassostrea gigas) farming: a case study in the hinase area, okayama prefecture, and shizugawa bay, miyagi prefecture, japan |
publishDate |
2023 |
url |
https://doi.org/10.5194/bg-20-4527-2023 https://bg.copernicus.org/articles/20/4527/2023/ |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Crassostrea gigas Pacific oyster |
genre_facet |
Crassostrea gigas Pacific oyster |
op_source |
eISSN: 1726-4189 |
op_relation |
doi:10.5194/bg-20-4527-2023 https://bg.copernicus.org/articles/20/4527/2023/ |
op_doi |
https://doi.org/10.5194/bg-20-4527-2023 |
container_title |
Biogeosciences |
container_volume |
20 |
container_issue |
22 |
container_start_page |
4527 |
op_container_end_page |
4549 |
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1786203377351262208 |