スクリプス海洋研究所の科学者と共同研究者が、世界32カ所のサンゴ礁の低酸素状態を世界で初めて評価しました。 Scripps Oceanography scientists and collaborators provide first-of-its-kind assessment of hypoxia, or low oxygen levels, across 32 coral reef sites around the world
2023-03-16 カリフォルニア大学サンディエゴ校(UCSD)
この研究は、世界の海洋の酸素含有量の減少とともに、珊瑚礁での低酸素状態が普遍的であることを明らかにしています。海洋温暖化が進行するにつれて、低酸素状態はますます深刻化することが予測されています。
研究者たちは、低酸素状態が現在から2100年までにどのように進行するかをモデル化し、重度、長期間、強度の低酸素状態が珊瑚礁に影響を与えることを発見しました。
<関連情報>
- https://today.ucsd.edu/story/new-study-provides-first-comprehensive-look-at-oxygen-loss-on-coral-reefs
- https://www.nature.com/articles/s41558-023-01619-2
海洋温暖化で増加する世界のサンゴ礁の低酸素症 Increasing hypoxia on global coral reefs under ocean warming
Ariel K. Pezner,Travis A. Courtney,Hannah C. Barkley,Wen-Chen Chou,Hui-Chuan Chu,Samantha M. Clements,Tyler Cyronak,Michael D. DeGrandpre,Samuel A. H. Kekuewa,David I. Kline,Yi-Bei Liang,Todd R. Martz,Satoshi Mitarai,Heather N. Page,Max S. Rintoul,Jennifer E. Smith,Keryea Soong,Yuichiro Takeshita,Martin Tresguerres,Yi Wei,Kimberly K. Yates & Andreas J. Andersson
Nature Climate Change Published:16 March 2023
DOI:https://doi.org/10.1038/s41558-023-01619-2
Abstract
Ocean deoxygenation is predicted to threaten marine ecosystems globally. However, current and future oxygen concentrations and the occurrence of hypoxic events on coral reefs remain underexplored. Here, using autonomous sensor data to explore oxygen variability and hypoxia exposure at 32 representative reef sites, we reveal that hypoxia is already pervasive on many reefs. Eighty-four percent of reefs experienced weak to moderate (≤153 µmol O2 kg-1 to ≤92 µmol O2 kg-1) hypoxia and 13% experienced severe (≤61 µmol O2 kg-1) hypoxia. Under different climate change scenarios based on four Shared Socioeconomic Pathways (SSPs), we show that projected ocean warming and deoxygenation will increase the duration, intensity and severity of hypoxia, with more than 94% and 31% of reefs experiencing weak to moderate and severe hypoxia, respectively, by 2100 under SSP5-8.5. This projected oxygen loss could have negative consequences for coral reef taxa due to the key role of oxygen in organism functioning and fitness.
