在高二氧化碳世界中的浮游植物化
M Debora Iglesias-Rodriguez1, Paul R Halloran, Rosalind E M Rickaby
1National Oceanography Centre, Southampton, University of Southampton Waterfront Campus, European Way, Southampton SO14 3ZH, UK.
Science (New York, N.Y.)
|April 19, 2008
概括
二氧化碳水平的上升出乎意料地促进了可可利多的化,这是海洋碳酸的主要生产者. 这一发现挑战了关于海洋酸化对这些重要生物的影响的假设.
科学领域:
- 海洋生物学 海洋生物学
- 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:
- 由于大气中二氧化碳增加,海洋酸化通常被预测会抑制海洋化.
- 藻类是海洋碳酸 (CaCO3) 生产的重要贡献者,约占全球总量的三分之一.
- 了解藻对变化的海洋化学反应对于预测未来的海洋动态至关重要.
研究的目的:
- 调查二氧化碳偏压升高对埃米利亚尼亚州化和初级生产的影响.
- 评估现场观测是否与实验室研究结果一致,以评估花对二氧化碳增加的反应.
主要方法:
- 实验室实验使Emiliania huxleyi暴露在不同的CO2部分压力下.
- 对深海沉积物核心的分析,以重建过去220年间历史上的藻质量变化.
主要成果:
- 实验室结果显示,在高二氧化碳条件下,Emiliania huxleyi的化和初级净产量显著增加.
- 实地证据表明,过去220年中,虫的平均质量增加了40%,这与实验室发现一致.
- 科利多类生物正在积极应对大气二氧化碳水平的上升.
结论:
- 与预期相反,Emiliania huxleyi显示了随着二氧化碳的增加而增强的化.
- 观察到的尾虫质量的历史增长支持这样的结论,即尾虫类生物正在适应不断变化的海洋条件.
- 这些发现需要对预测未来海洋和气候情景的生物地球化学模型进行修订.
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