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気候変動による海産魚類の適応能力を見極めるため、未来の海を模した海洋環境を探る
https://doi.org/10.15102/0002000706
https://doi.org/10.15102/00020007062573549f-0951-4395-804c-6aa78f226c06
| 名前 / ファイル | ライセンス | アクション |
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IzumiyamaMichaelFulltext.pdf (3.3 MB)
Download is available from 2025/11/3.
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IzumiyamaMichaelExamAbstract.pdf (48 KB)
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IzumiyamaMichaelsummary.pdf (88 KB)
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| Item type | 学位論文 / Thesis or Dissertation(1) | |||||||
|---|---|---|---|---|---|---|---|---|
| 公開日 | 2024-11-25 | |||||||
| タイトル | ||||||||
| タイトル | 気候変動による海産魚類の適応能力を見極めるため、未来の海を模した海洋環境を探る | |||||||
| 言語 | ja | |||||||
| タイトル | ||||||||
| タイトル | Using Natural Analogues of the Future Ocean to Study the Adaptive Potential of Fish Communities to Environmental Change | |||||||
| 言語 | en | |||||||
| 言語 | ||||||||
| 言語 | eng | |||||||
| キーワード | ||||||||
| 主題Scheme | Other | |||||||
| 主題 | Marine Biology | Ocean Acidification | Climate Change | Fish Ecology and Biology | Genomics | Natural Analogues | |||||||
| 資源タイプ | ||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_db06 | |||||||
| 資源タイプ | doctoral thesis | |||||||
| ID登録 | ||||||||
| ID登録 | 10.15102/0002000706 | |||||||
| ID登録タイプ | JaLC | |||||||
| アクセス権 | ||||||||
| アクセス権 | open access | |||||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||||
| 著者 (英) |
Izumiyama, Michael
× Izumiyama, Michael
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| 抄録 | ||||||||
| 内容記述タイプ | Abstract | |||||||
| 内容記述 | Understanding how fishes will respond to future ocean conditions under environmental changes can help us better understand the future of fish populations. Sites such as CO2 seeps act as natural analogues of the future ocean and can be used to understand the effects of ocean acidification (OA) on marine organisms. Examining fishes present at Natural analogues offer the opportunity to understand how they may be able to adapt to this environment. Our study used two natural analogues, a semi-enclosed bay in Bouraké, New Caledonia, and a CO2 seep off Shikine Island, Japan, to examine how the fishes found at these sites survive in this environment simulating an end-of-century scenario of OA. We examine the effects of OA on three levels: the community, the individuals, and the population. First, we examined how fish assemblages differed between the natural analogue and a nearby comparison site in Bouraké, New Caledonia. We used environmental DNA metabarcoding and underwater visual surveys to assess the fish assemblages at the two sites. Our study found that some species, such as gobies may be more tolerant of the multiple environmental stressors found in Bouraké compared to wrasses and parrotfish (Labriformes), which may be more sensitive to the effects of environmental change. Next, we examined the individual response to OA by sequencing the transcriptome of the brain and gill from the neon damselfish (Pomacentrus coelestis) at the CO2 seep off Shikine Island and a nearby control reef across two seasons to examine the genetic mechanism for adaptation. Our study found genes associated with acid-base regulation, O2 transportation, and immune responses were differentially expressed in response to conditions of OA found at the seep, supporting previous work examining the molecular mechanisms of adaptation OA in fishes. Finally, we examined the presence of selection for adaptation to OA at the CO2 seep off Shikine Island by collecting DNA from 135 P. coelestis across the island and examining genome-wide single-nucleotide polymorphism. We found potential genes under selection at the CO2 seep, suggesting selection for adaptation to OA. Our study shed light on the various effects of environmental change on fishes at natural analogues and the potential response of fishes to OA. However, there may also be adverse effects of OA, which warrant further investigation and highlight the importance of natural analogues to study how fishes respond to environmental changes. | |||||||
| 言語 | en | |||||||
| 口頭試問日 | ||||||||
| 値 | 2024-09-10 | |||||||
| 学位授与年月日 | ||||||||
| 学位授与年月日 | 2024-10-31 | |||||||
| 学位名 | ||||||||
| 学位名 | Doctor of Philosophy | |||||||
| 学位授与番号 | ||||||||
| 学位授与番号 | 甲第169号 | |||||||
| 学位授与機関 | ||||||||
| 学位授与機関識別子Scheme | kakenhi | |||||||
| 学位授与機関識別子 | 38005 | |||||||
| 学位授与機関名 | Okinawa Institute of Science and Technology Graduate University | |||||||
| 著者版フラグ | ||||||||
| 出版タイプ | VoR | |||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||
| 権利 | ||||||||
| 権利情報 | © 2024 The Author. | |||||||
| 開始ページ | 1 | |||||||
