海草草地作为海洋酸化避难所,是海幼虫的避难所
C Ravaglioli1, L De Marchi2, J Giannessi2
1Dipartimento di Biologia, Università di Pisa, CoNISMa, via Derna 1, 56126 Pisa, Italy.
The Science of the total environment
|October 1, 2023
概括
海草Posidonia oceanica减轻了海洋酸化对海幼虫的影响. 它的存在缓冲负面影响,改善幼虫的发育和在预测的气候变化情景下的生长.
科学领域:
- 海洋生物学 海洋生物学
- 生态生态学 生态生态学
- 气候变化科学 气候变化科学
背景情况:
- 基础物种,如海草,通过缓解环境压力来创造有利的息地.
- 基础物种在保护气候敏感物种免受气候变化影响方面的作用还未得到充分研究.
- 海洋酸化对海洋化生物构成重大威胁.
研究的目的:
- 调查海草Posidonia oceanica是否可以减轻海洋酸化对海Paracentrotus lividus的有害影响.
- 评估P. oceanica在不同pH条件下对幼虫发育和生长的影响.
主要方法:
- 使用P. oceanica和P. lividus幼虫进行了一个中宇宙实验.
- 幼虫暴露在环境和低pH值 (RCP8.5情景) 条件下,有或没有P. oceanica.
- 在早期 (pluteus) 和晚期 (echinopluteus) 发育阶段测量了幼虫形率和身体长度.
主要成果:
- 海洋的存在增加了0.10.15单位的平均每日pH值.
- 在低pH下,与P. oceanica相关的幼虫显示出23%的形减少.
- 在低pH值下与P. oceanica一起种植的Echinoplutei体长总长度增加了34%.
结论:
- 海洋海通过其代谢活动提高海水pH值和碳酸盐化学成分.
- 这种缓冲能力可以减轻海洋酸化对化生物的负面影响.
- 海洋海藻可能成为打击海洋生态系统气候驱动生物多样性丧失的关键工具.
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