尾虫Oikopleura dioica可以在高CO2海洋中增强碳出口
Jan Taucher1, Anna Katharina Lechtenbörger1, Jean-Marie Bouquet2,3
1GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany.
Global change biology
|November 10, 2023
概括
海洋酸化可能会促进碳出口,因为尾虫,如Oikopleura dioica,在低pH下壮成长. 这些关键的动物浮游生物通过产生更多的生物质和沉降颗粒来增加碳流,影响海洋.
科学领域:
- 海洋生态海洋生态学
- 海洋学 海洋学 海洋学
- 生物地质化学生物地质化学
背景情况:
- 凝性动物浮游生物对海洋的生物碳至关重要.
- 尾虫很丰富,但它们在碳出口中的未来作用尚不清楚.
- 海洋酸化对海洋生态系统构成威胁.
研究的目的:
- 调查OA对浮游生物食物网和碳出口的影响.
- 专注于关键石的尾动物物种Oikopleura dioica.
- 评估极端OA事件如何影响O. dioica和碳流.
主要方法:
- 在现场中宇宙实验 (~55-60 m3).
- 模拟环境和高二氧化碳的条件.
- 监控浮游生物群落结构和垂直碳流.
主要成果:
- 高二氧化碳显著增加了O. dioica生物量 (+~2倍) 和生育能力 (+20%).
- 在高CO2的O. dioica开花期间,碳出口增长了42%-64%.
- 来自O. dioica的废弃粘液库和便颗粒占碳出口总量的39%.
结论:
- O. dioica 在OA下壮成长,增强碳出口.
- 尾虫可能会成为更重要的碳载体与正在进行的OA.
- 这凸显了海洋酸化对复杂的生态反应.
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