海洋酸性化に対する生物群集の応答評価：直接効果と間接効果の統合理解

• Project/Area Number: 18H02219
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 39060:Conservation of biological resources-related
• Research Institution: Tokyo University of Marine Science and Technology (2020-2021); University of Tsukuba (2018-2019)
• Principal Investigator: 今 孝悦 東京海洋大学, 学術研究院, 准教授 (40626868)
• Co-Investigator(Kenkyū-buntansha): AGOSTINI SYLVAIN 筑波大学, 生命環境系, 助教 (20700107) ; 和田 茂樹 筑波大学, 生命環境系, 助教 (60512720) ; BENJAMIN HARVEY 筑波大学, 生命環境系, 助教 (70785542)
• Project Period (FY): 2018-04-01 – 2022-03-31
• Project Status: Completed (Fiscal Year 2021)
• Budget Amount: ¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000); Fiscal Year 2021: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000); Fiscal Year 2020: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2019: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2018: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
• Keywords: 海洋酸性化 / 二酸化炭素 / CO2シープ / 群集 / 間接効果 / 生物群集 / 直接効果

Outline of Annual Research Achievements

海洋酸性化は、資源生物を含む様々な種の成育を阻害し、生残率を低下させる深刻な環境問題である。本研究では、伊豆諸島・式根島に存在するCO2シープ(海底からCO2が噴き出し、天然の生態系全体が既に酸性化している海域)を用いて、海洋酸性化に対する生物群集の応答を評価することを目的としている。
本年度は、岩礁潮間帯において重要な生態的地位を占めるカサガイ類を対象に、海洋酸性化の間接効果を検討した。前年度までの調査で、カサガイ群集の種組成は、酸性化海域と通常海域で明瞭に異なり、ウノアシ個体数は酸性化海域で有意に減少する一方で、カラマツガイには有意差が認められず、両海域で高密度に保たれることが判明している。カサガイ類の餌となる藻類は、一般に海洋酸性化による正の効果を受けるため、カサガイ類の餌量の増加が予測される。そこで藻類の多寡を介したカサガイ群集の種組成変化を検証したところ、酸性化海域と通常海域間で藻類量に有意差が認められず、餌資源による間接効果は検出されなかった。他方、カサガイ類は、岩盤表面を這って移動する際に、そこに生息する固着生物を剥ぎ取りながら移動することで、他種に対して強力な排除効果を示す（ブルドーザー効果）。カサガイ類によるブルドーザー効果を検証したところ、酸性化海域ではブルドーザー効果の顕著な低下が認められ、それはウノアシ個体数の減少に起因することが示唆された。したがって、海洋酸性化は、カサガイ類のブルドーザー効果を低下させ、それを介して間接的に他の固着生物群集に影響を及ぼすことが明らかとなった。

Research Progress Status

令和3年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和3年度が最終年度であるため、記入しない。

Research Products

• [Int'l Joint Research] University of Plymouth(英国)
• [Int'l Joint Research] University of Plymouth(英国)
• [Int'l Joint Research] University of Plymouth(英国)
• [Int'l Joint Research] Keimyung Universit(韓国)
• [Int'l Joint Research] Xiamen University/Nanjing University(中国)
• [Journal Article] Decreased Diversity and Abundance of Marine Invertebrates at CO2 Seeps in Warm-Temperate Japan (2022)
  • Author(s): Hall-Spencer Jason M.、Belfiore Giuseppe、Tomatsuri Morihiko、Porzio Lucia、Harvey Ben P.、Agostini Sylvain、Kon Koetsu
  • Journal Title: Zoological Science Volume: 39 Issue: 1 Pages: 41-51
  • DOI: 10.2108/zs210061
  • NAID: 210000186889
  • ISSN: 0289-0003
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Multiple effects of a typhoon strike and wastewater effluent on benthic macrofaunal communities in a mangrove estuary (2022)
  • Author(s): Kon Koetsu、Goto Ayumi、Tanita Iwao、Yamada Hideaki
  • Journal Title: Hydrobiologia Volume: in press
  • DOI: 10.1007/s10750-022-04877-x
  • Peer Reviewed
• [Journal Article] Ocean acidification locks algal communities in a species‐poor early successional stage (2021)
  • Author(s): Harvey Ben P.、Kon Koetsu、Agostini Sylvain、Wada Shigeki、Hall‐Spencer Jason M.
  • Journal Title: Global Change Biology Volume: 27 Pages: 2174-2187
  • DOI: 10.1111/gcb.15455
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Food resource use by juveniles of the endangered sleeper Eleotris oxycephala in the Sagami River system, Japan (2021)
  • Author(s): Yamakawa Uchu、Kanou Kouki、Tsuda Yoshiaki、Kon Koetsu
  • Journal Title: Ichthyological Research Volume: 68 Pages: 426-436
  • DOI: 10.1007/s10228-020-00795-x
  • NAID: 40022635050
  • Peer Reviewed
• [Journal Article] Simplification, not “tropicalization”, of temperate marine ecosystems under ocean warming and acidification (2021)
  • Author(s): Agostini Sylvain、Harvey Ben P.、Milazzo Marco、Wada Shigeki、Kon Koetsu、Floc’h Nicolas、Komatsu Kosei、Kuroyama Mayumi、Hall‐Spencer Jason M.
  • Journal Title: Global Change Biology Volume: 27 Pages: 4771-4784
  • DOI: 10.1111/gcb.15749
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Feedback mechanisms stabilise degraded turf algal systems at a CO2 seep site (2021)
  • Author(s): Harvey Ben P.、Allen Ro、Agostini Sylvain、Hoffmann Linn J.、Kon Koetsu、Summerfield Tina C.、Wada Shigeki、Hall-Spencer Jason M.
  • Journal Title: Communications Biology Volume: 4 Pages: 219-219
  • DOI: 10.1038/s42003-021-01712-2
  • NAID: 120007185359
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Distributional characteristics of a seagrass bed of <i>Zostera japonica</i> confirmed in the intertidal zone around the Yaeyama Islands (2021)
  • Author(s): 山田 秀秋, 谷田 巖, 渡辺 信, 南條楠土, 今 孝悦
  • Journal Title: NIPPON SUISAN GAKKAISHI Volume: 87 Issue: 1 Pages: 43-45
  • DOI: 10.2331/suisan.20-00033
  • NAID: 130007975900
  • ISSN: 0021-5392, 1349-998X
  • Peer Reviewed / Open Access
• [Journal Article] Responses of intertidal bacterial biofilm communities to increasing pCO2 (2020)
  • Author(s): Kerfahi D., Harvey B., Agostini S., Kon K., Huang R., Adams J. and Hall-Spencer J.
  • Journal Title: Marine Biotechnology Volume: in press Pages: 727-738
  • DOI: 10.1007/s10126-020-09958-3
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Feeding habits of juvenile <i>Siganus fuscescens</i> in a subtropical seagrass meadow estimated by rearing experiments and dual stable isotope analysis (2020)
  • Author(s): 山田 秀秋、今 孝悦、中本 健太、早川 淳、南條 楠土、河村 知彦
  • Journal Title: Aquaculture Sci. Volume: 68 Issue: 2 Pages: 163-167
  • DOI: 10.11233/aquaculturesci.68.163
  • NAID: 130008054431
  • ISSN: 0371-4217, 2185-0194
  • Peer Reviewed
• [Journal Article] Fish and macroinvertebrate fauna associated with floating or drifting surface water mangrove litter in a shallow coastal area in Trang, southern Thailand (2020)
  • Author(s): Horinouchi M., Kanou K., Kon K., Tongnunui P. and Sano M.
  • Journal Title: Ichthyological Research Volume: 67 Pages: 177-184
  • DOI: 10.1007/s10228-019-00695-9
  • NAID: 40022132657
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] 給餌実験と炭素・窒素安定同位体比分析から推定した亜熱帯海草藻場におけるアイゴ稚魚の摂食生態 (2020)
  • Author(s): 山田秀秋・今 孝悦・中本健太・早川 淳・南條 楠土・河村知彦
  • Journal Title: 水産増殖 Volume: in press
  • NAID: 130008054431
  • Peer Reviewed
• [Journal Article] Diatoms Dominate and Alter Marine Food-Webs When CO2 Rises (2019)
  • Author(s): Ben P. Harvey, Sylvain Agostini, Koetsu Kon, Shigeki Wada and Jason M. Hall-Spencer
  • Journal Title: Diversity Volume: 11 Pages: 242-242
  • DOI: 10.3390/d11120242
  • NAID: 120007132863
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Impacts of ocean acidification on hermit crab communities through contrasting responses of Pagurus filholi (de Man, 1887) and Clibanarius virescens (Krauss, 1843) (2019)
  • Author(s): Tomatsuri M. and Kon K.
  • Journal Title: Aquatic Ecology Volume: 53 Pages: 569-580
  • DOI: 10.1007/s10452-019-09709-0
  • Peer Reviewed
• [Journal Article] Development of microsatellite markers for the endangered sleeper <i>Eleotris oxycephala</i> (Perciformes: Eleotridae) (2019)
  • Author(s): Yamakawa Uchu、Kaneko Shingo、Imai Ryosuke、Faulks Leanne Kay、Kon Koetsu、Kyogoku Daisuke、Isagi Yuji、Tsuda Yoshiaki
  • Journal Title: Genes & Genetic Systems Volume: 94 Issue: 5 Pages: 219-224
  • DOI: 10.1266/ggs.19-00007
  • NAID: 130007760324
  • ISSN: 1341-7568, 1880-5779
  • Peer Reviewed
• [Journal Article] Morphological development and occurrence patterns of larval and juvenile halfbeaks, Zenarchopterus spp., associated with mangrove flotsam in a shallow coastal area, Trang, southern Thailand (2019)
  • Author(s): Kanou K., Horinouchi M., Tongnunui P., Kon K. and Sano M.
  • Journal Title: Biogeography Volume: -
  • NAID: 130007896249
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The influence of CO2 seeps to coastal environments of Shikine Island in Japan as indicated by geochemistry analyses of seafloor sediments (2019)
  • Author(s): Hirano H., Kon K., Yoshida M., Harvey B. and Setiamarga D
  • Journal Title: International Journal of GEOMATE Volume: 16 Pages: 82-89
  • Peer Reviewed
• [Journal Article] Ocean acidification drives community shifts towards simplified non-calcified habitats in a subtropical?temperate transition zone (2018)
  • Author(s): Agostini Sylvain、Harvey Ben P.、Wada Shigeki、Kon Koetsu、Milazzo Marco、Inaba Kazuo、Hall-Spencer Jason M.
  • Journal Title: Scientific Reports Volume: 8 Pages: 11354-11354
  • DOI: 10.1038/s41598-018-29251-7
  • NAID: 120007133911
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Seasonal variations in leaf growth of Cymodocea serrulata in subtropical seagrass meadows (2018)
  • Author(s): Yamada H, Nakamoto K, Hayakawa J, Kawamura T, Kon K, Shimabukuro H, Fukuoka K
  • Journal Title: Fisheries Science Volume: 84 Pages: 461-468
  • DOI: 10.1007/s12562-018-1183-8
  • NAID: 40021546879
  • Peer Reviewed
• [Journal Article] 茨城県利根川で記録された国内外来魚ドンコOdontobutis obscura. (2018)
  • Author(s): 1.山川宇宙・今井亮介・今 孝悦・津田吉晃
  • Journal Title: 茨城生物 Volume: 38 Pages: 2-5
• [Presentation] 海洋酸性化がクモハゼの行動と餌生物群集に与える影響 (2021)
  • Author(s): 貞家遼平・今孝悦・Sylvain Agostini
  • Organizer: 2021年日本プランクトン学会・ベントス学会合同大会
• [Presentation] 海洋酸性化がカサガイ類に与える影響 (2021)
  • Author(s): 矢野優貴・Sylvain Agostini・今孝悦
  • Organizer: 2021年日本プランクトン学会・ベントス学会合同大会
• [Presentation] Effects of ocean acidification on marine ecosystem services: use of natural analogues around volcanic CO2 vents. (2020)
  • Author(s): Wada S., Agostini S., Harvey B., Kon K. and Take M.
  • Organizer: JpGU-AGU Joint Meeting 2020
  • Int'l Joint Research
• [Presentation] カサガイ群集に対する海洋酸性化の影響 (2020)
  • Author(s): 今孝悦・矢野優貴
  • Organizer: 令和2年度日本水産学会春季大会
• [Presentation] 亜熱帯海草藻場とマングローブ域に生息する魚類の餌資源利用 (2020)
  • Author(s): 南條楠土・清水雅史・冨永翔太・谷田巌・今孝悦・山田秀秋
  • Organizer: 令和2年度日本水産学会春季大会
• [Presentation] 石垣島名蔵湾の海草藻場に出現する魚類の食性 (2020)
  • Author(s): 清水雅史・南條楠土・谷田巌・今孝悦・山田秀秋
  • Organizer: 令和2年度日本水産学会春季大会
• [Presentation] マングローブ域の底生動物群集に対する富栄養化の影響 (2020)
  • Author(s): 後藤鮎美・山田秀秋・谷田巖・南條楠土・林崎健一・渡辺信・今孝悦
  • Organizer: 日本生態学会第67回全国大会
• [Presentation] Genetic structure and dispersal dynamics of the amphidromous sleeper Eleotris oxycephala along the Kuroshio Current (2019)
  • Author(s): Yamakawa U., Okano K., Imai R., Senou H., Kaneko S., Saito Y., Faulks L., Akasaka M., Kon K., Tsuda Y.
  • Organizer: BES Annual Meeting 2019
  • Int'l Joint Research
• [Presentation] マングローブ域の底生動物群集に対する複合的攪乱の影響 (2019)
  • Author(s): 今 孝悦・後藤鮎美・山田秀秋・谷田 巖・南條楠土
  • Organizer: 平成31年度日本水産学会春季大会
• [Presentation] 岩礁潮間帯のヤドカリ群集に対する海洋酸性化の影響 (2019)
  • Author(s): 戸祭森彦・今 孝悦
  • Organizer: 第66回日本生態学会大会
• [Presentation] Geochemistry analyses of sea floor sediments from the coasts of Shikine island in Japan indicate an influence of CO2 seeps to coastal environments. (2018)
  • Author(s): Hirano H., Kon K., Yoshida M., Harvey B., Setiamarga D.
  • Organizer: The 8th International Conference on Geotechnique, Construction Materials and Environment
  • Int'l Joint Research
• [Presentation] Local-scale genetic structure and kinship in the sleeper goby, Eleotris oxycephala, an amphidromous migratory fish, in the Sagami River System, Japan. (2018)
  • Author(s): 4.Yamakawa U., Imai R., Tsunamoto Y., Kon K., Suyama Y., Faulks L., Yoshiaki Tsuda Y.
  • Organizer: The 8th East Asian Federation of Ecological Societies International Congress.
  • Int'l Joint Research
• [Book] Marine Ecology: Sea Shelf to Deep Sea. In: Inaba K. and Hall-Spencer J. (eds), Japanese Marine Life -A Practical Training Guide in Marine Biology- (2020)
  • Author(s): Fujiwara Y. and Kon K.
  • Publisher: Springer Singapore
  • ISBN: 9789811513251
• [Book] Experimental Design in Marine Ecology. In: Inaba K. and Hall-Spencer J. (eds), Japanese Marine Life -A Practical Training Guide in Marine Biology- (2020)
  • Author(s): Kon K., Yamashiro H., Horinouchi M. and Kawaida S.
  • Publisher: Springer Singapore
  • ISBN: 9789811513251
• [Book] Survey Techniques in Marine Ecology. In: Inaba K. and Hall-Spencer J. (eds), Japanese Marine Life -A Practical Training Guide in Marine Biology- (2020)
  • Author(s): Harvey B., Kon K. and Agostini S.
  • Publisher: Springer Singapore
  • ISBN: 9789811513251
• [Book] Marine Ecology: Intertidal/Littoral Zone. In: Inaba K. and Hall-Spencer J. (eds), Japanese Marine Life -A Practical Training Guide in Marine Biology- (2020)
  • Author(s): Kon K., Shimanaga M. and Horinouchi M.
  • Publisher: Springer Singapore
  • ISBN: 9789811513251
• [Book] Distribution of Organisms on the Seashore. In: Inaba K. and Hall-Spencer J. (eds), Japanese Marine Life -A Practical Training Guide in Marine Biology- (2020)
  • Author(s): Kon K.
  • Publisher: Springer Singapore
  • ISBN: 9789811513251
• [Book] Human Impact. In: Inaba K. and Hall-Spencer J. (eds), Japanese Marine Life -A Practical Training Guide in Marine Biology- (2020)
  • Author(s): Hall-Spencer J. and Kon K.
  • Publisher: Springer Singapore
  • ISBN: 9789811513251