日本地球惑星科学連合2019年大会

講演情報

[J] ポスター発表

セッション記号 A (大気水圏科学) » A-CG 大気海洋・環境科学複合領域・一般

[A-CG44] 沿岸海洋生態系─2.サンゴ礁・藻場・マングローブ

2019年5月28日(火) 17:15 〜 18:30 ポスター会場 (幕張メッセ国際展示場 8ホール)

コンビーナ:梅澤 有(東京農工大学)、宮島 利宏(東京大学 大気海洋研究所 海洋地球システム研究系 生元素動態分野)、渡邉 敦(笹川平和財団 海洋政策研究所)、樋口 富彦(東京大学大気海洋研究所)

[ACG44-P06] 環境ストレスがサンゴの白化に与える影響

*樋口 富彦1 (1.東京大学大気海洋研究所)

キーワード:地球温暖化、サンゴ白化現象、複合ストレス

Coral reefs are threatened by multiple environmental stresses at both the global and the local scales. Declining water quality in coastal reefs has been reported such as due to red soil runoff, agricultural fertilizers, and anti-fouling chemicals. Coral bleaching has been frequently reported and actively studied recently. The synergistic effects of multiple stressors have also been studied, with several studies reporting accelerated bleaching under conditions of high seawater temperature and low water quality. For example, enrichment of nitrate can accelerate coral bleaching under high light or high temperature conditions compared with single stress conditions. If the concentration of nitrate increases damage to coral reefs in coastal areas could significantly increase under high temperature or high light stress. Moreover, environmental bacteria, Sulfitobacter sp., which can be found in the seawater of coral reef, enhanced bleaching process under high temperature. These nitrate and bacteria did not affect corals severely under ambient temperature (not high temperature). To mitigate environmental stresses on coral reefs, it is important to evaluate risks due not only to global warming, but also to local stresses.