[A-CG41] 沿岸海洋生態系－2．サンゴ礁・藻場・マングローブ

[ACG41-01] Using natural analogues for the study of ecosystems effects of Ocean Acidification: the Shikine CO₂ seep and the ICONA network

★Invited Papers

*アゴスティーニ シルバン¹、ハーベイ ベン¹、ポルジオ ルチア¹、ホール・スペンサー ジェソン^2,1、カッタノ カルロ³、ファニー ウルブレック⁴、ラバシ ティム⁵、栗原 晴子⁷、ラッセル ベイドン⁶、ライマー ジェームズ⁷、ICONA 参加者⁸、マルコ ミラッツォ⁹、リカルド ロドルフォ・メタルパ⁴、和田 茂樹¹ (1.筑波大学下田臨海実験センター、2.University of Plymouth, UK、3.Stazione Zoologica Anton Dohrn, Italy、4.UMR Entropie, New Caledonia、5.沖縄科学技術大学院大学、6.Swire Institute of Marine Science, University of Hong Kong, Hong Kong、7.琉球大学、8.ICONA network、9.University of Palermo)

キーワード：海洋酸性化、ナチュラル　アナログ、サンゴ礁

Increasing atmospheric CO₂ concentration is driving the rapid acidification of the ocean. This will certainly lead to severe consequences to the marine environment. Although laboratory experiments show that future CO₂ and temperature levels can affect a variety of physiological and behavioral traits and processes of coral reef organisms, the ecosystem effects remain uncertain and with considerable variation among species. The Shikine CO₂ seep was described in 2015 and shown to be suitable for the study of ocean acidification. Since then more than 20 papers have been published, showing a wide range of physiological and ecological effects of ocean acidification. Here we will focus on the effects on scleractinian corals. By studying the resistant species and individuals found in the high CO₂ areas, we hope to understand the eco-physiological traits and adaptation mechanisms that will shape future coral communities around the world.

Natural analogues of a high CO₂ world such as volcanic CO₂ vents, like in Shikine Island, and enclosed bays provide a unique opportunity to investigate the fundamental responses and potential adaptation of marine organisms to long-term exposure to elevated CO₂, temperature, salinity and hypoxia. The International CO₂ Natural Analogues (ICONA) network was created to foster the use of natural analogues, harmonize the techniques employed and enhance exchanges and collaboration. The network is now working closely with OARS, a UN ocean decade program.