幼核植物浮游生物在热带和亚热带海洋中因CO2升高而导致初级产量减少
Rongbo Dai1, Zuozhu Wen1, Haizheng Hong1
1State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, Fujian 361102, People's Republic of China.
概括
由于二氧化碳 (CO2) 的增加,海洋酸化降低了海洋浮游生物的生产力,特别是在营养缺乏地区. 小型真核浮游植物受影响最大,影响了全球初级生产预测.
科学领域:
- 海洋生物学 海洋生物学
- 海洋学 海洋学 海洋学
- 气候变化科学 气候变化科学
背景情况:
- 人为二氧化碳 (CO2) 排放正在推动海洋酸化.
- 海洋酸化对海洋浮游生物生产力的影响仍然不确定.
- 植物浮游生物是海洋生态系统中至关重要的初级生产者.
研究的目的:
- 研究海洋酸化对植物浮游生物群落组成和生产力的影响.
- 评估植物浮游生物对西北太平洋地区二氧化碳水平升高的反应的区域差异.
- 预测在脆弱海洋地区对初级生产的潜在全球影响.
主要方法:
- 实地研究在西北太平洋进行,包括北太平洋亚热带旋转和南中国海北部.
- 在环境和酸性条件下测量了浮游植物群体的组成和初级生产率.
- 数据被推断出来,以预测对寡头性海洋区域的全球影响.
主要成果:
- 海洋酸化导致北太平洋亚热带旋转和南中国海北部的初级产量持续减少.
- Prokaryotic 植物浮游生物对高CO2的反应呈现中性到积极的反应.
- 小型真核浮游植物 (<20微米),限,主要负责观察到的社区初级生产的下降.
结论:
- 海洋酸化对特定亚热带和热带地区的初级生产产生负面影响.
- 小型真核浮游植物特别容易受到海洋酸化的影响.
- 全球初级产量在低叶绿素-a,寡质型区域可能会减少约5 Pg Cy-1由于酸化和分层.
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