Impact of exposure temperature rise on mass mortality of tidal flat pacific oysters
Oysters are a major commercial and ecological fishery resource. Recently, the oyster industry has experienced mass mortality in summer due to environmental factors. Generally, the survival of oysters in aquatic environments is mainly impacted by environmental stressors such as elevated sea temperatu...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-11-01
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| Series: | Frontiers in Marine Science |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/fmars.2023.1275521/full |
| _version_ | 1797641268349632512 |
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| author | Jang-Mu Heo Seong-Su Kim Do-Youn Kim Soon Woo Lee Jung Suk Lee Min Ho Kang Seong Eun Kim |
| author_facet | Jang-Mu Heo Seong-Su Kim Do-Youn Kim Soon Woo Lee Jung Suk Lee Min Ho Kang Seong Eun Kim |
| author_sort | Jang-Mu Heo |
| collection | DOAJ |
| description | Oysters are a major commercial and ecological fishery resource. Recently, the oyster industry has experienced mass mortality in summer due to environmental factors. Generally, the survival of oysters in aquatic environments is mainly impacted by environmental stressors such as elevated sea temperatures and reduced salinity; however, the stressors impacting tidal flat oysters that are repeatedly exposed to air remain poorly understood. Hence, we studied the relationship between environmental factors and the survival of tidal flat pacific oysters in Incheon, South Korea, where mass mortality is common. Principal component analysis and Bayesian networks revealed that air temperature (in spring and summer) and sea temperature (in summer) are related to oyster production. In habitats of the tidal flat oysters during the summer, high temperatures of 34.7–35.4°C (maximum 47.6°C) were observed for average durations of 0.8–1.9 hours (maximum 3.6 hours). Furthermore, heat waves occurred for up to 12 consecutive days. Results from the multiple stress test showed that when exposed to 45°C (air temperature) for 4 hours per day, the survival rate of oysters was 42.5% after only 2 days and 0% after 6 days. The findings stemming from the field observations and stress tests suggest that high temperatures during emersion may contribute to mass mortality of oysters in summer, indicating a potential threat to oysters due to climate change. To understand the effects of future thermal stress on oysters more accurately, simultaneous long-term trend analyses and field-based observations are required. |
| first_indexed | 2024-03-11T13:43:07Z |
| format | Article |
| id | doaj.art-3446bd99e9d446ff985c20eb63ed4508 |
| institution | Directory Open Access Journal |
| issn | 2296-7745 |
| language | English |
| last_indexed | 2024-03-11T13:43:07Z |
| publishDate | 2023-11-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Marine Science |
| spelling | doaj.art-3446bd99e9d446ff985c20eb63ed45082023-11-02T11:14:25ZengFrontiers Media S.A.Frontiers in Marine Science2296-77452023-11-011010.3389/fmars.2023.12755211275521Impact of exposure temperature rise on mass mortality of tidal flat pacific oystersJang-Mu Heo0Seong-Su Kim1Do-Youn Kim2Soon Woo Lee3Jung Suk Lee4Min Ho Kang5Seong Eun Kim6Marine Environmental Research Department, ARA Consulting & Technology Ltd, Incheon, Republic of KoreaMarine Environmental Research Department, ARA Consulting & Technology Ltd, Incheon, Republic of KoreaMarine Environmental Research Department, ARA Consulting & Technology Ltd, Incheon, Republic of KoreaDepartment of Marine Environment and Business, E&C Technology Co. Ltd., Uiwang, Republic of KoreaInstitute of Environmental Protection, NeoEnBiz Co., Bucheon, Republic of KoreaInstitute of Environmental Protection, NeoEnBiz Co., Bucheon, Republic of KoreaMarine Environmental Research Department, ARA Consulting & Technology Ltd, Incheon, Republic of KoreaOysters are a major commercial and ecological fishery resource. Recently, the oyster industry has experienced mass mortality in summer due to environmental factors. Generally, the survival of oysters in aquatic environments is mainly impacted by environmental stressors such as elevated sea temperatures and reduced salinity; however, the stressors impacting tidal flat oysters that are repeatedly exposed to air remain poorly understood. Hence, we studied the relationship between environmental factors and the survival of tidal flat pacific oysters in Incheon, South Korea, where mass mortality is common. Principal component analysis and Bayesian networks revealed that air temperature (in spring and summer) and sea temperature (in summer) are related to oyster production. In habitats of the tidal flat oysters during the summer, high temperatures of 34.7–35.4°C (maximum 47.6°C) were observed for average durations of 0.8–1.9 hours (maximum 3.6 hours). Furthermore, heat waves occurred for up to 12 consecutive days. Results from the multiple stress test showed that when exposed to 45°C (air temperature) for 4 hours per day, the survival rate of oysters was 42.5% after only 2 days and 0% after 6 days. The findings stemming from the field observations and stress tests suggest that high temperatures during emersion may contribute to mass mortality of oysters in summer, indicating a potential threat to oysters due to climate change. To understand the effects of future thermal stress on oysters more accurately, simultaneous long-term trend analyses and field-based observations are required.https://www.frontiersin.org/articles/10.3389/fmars.2023.1275521/fullpacific oystermass mortalityBayesian Networkmachine learningtidal emersionheat wave |
| spellingShingle | Jang-Mu Heo Seong-Su Kim Do-Youn Kim Soon Woo Lee Jung Suk Lee Min Ho Kang Seong Eun Kim Impact of exposure temperature rise on mass mortality of tidal flat pacific oysters Frontiers in Marine Science pacific oyster mass mortality Bayesian Network machine learning tidal emersion heat wave |
| title | Impact of exposure temperature rise on mass mortality of tidal flat pacific oysters |
| title_full | Impact of exposure temperature rise on mass mortality of tidal flat pacific oysters |
| title_fullStr | Impact of exposure temperature rise on mass mortality of tidal flat pacific oysters |
| title_full_unstemmed | Impact of exposure temperature rise on mass mortality of tidal flat pacific oysters |
| title_short | Impact of exposure temperature rise on mass mortality of tidal flat pacific oysters |
| title_sort | impact of exposure temperature rise on mass mortality of tidal flat pacific oysters |
| topic | pacific oyster mass mortality Bayesian Network machine learning tidal emersion heat wave |
| url | https://www.frontiersin.org/articles/10.3389/fmars.2023.1275521/full |
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