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对"海洋酸化对突出的N₂固定菌的复杂影响"的评论

David A Hutchins¹, Feixue Fu², Nathan G Walworth²

¹Marine and Environmental Biology, Department of Biological Sciences, University of Southern California, Los Angeles, CA 90089, USA. dahutch@usc.edu.

Science (New York, N.Y.)

|September 16, 2017

概括

这项研究驳斥了氨或铜对海洋菌Trichodesmium的毒性假设. 多项研究表明,高水平的二氧化碳增强,而不是降低的增长和固定.

科学领域:

海洋微生物学
生物地质化学
海洋学

背景情况:

海洋蓝藻微生物对固定至关重要.
之前的研究表明,高的二氧化碳会因毒性而抑制的生长和固定.
香港等. 预计氨或铜污染导致了这些观察到的效应.

研究的目的:

评估Hong等人提出的毒性假设.
综合多项关于三甲对高CO2反应的证据.
澄清二氧化碳增加对海洋固的影响.

主要方法:

文献审查和已发表的实验数据的综合.
在不同的二氧化碳条件下对三氧化进行研究的分析.
使用和不使用受控污染物的研究结果的比较.

主要成果:

多项独立研究与毒性假设相矛盾.
证据支持 Trichodesmium 在高CO2 的增长和固.
控制的实验始终显示高二氧化碳的积极反应.

结论:

在Trichodesmium中提出的氨或铜毒性并未得到广泛的科学文献的支持.
较高的二氧化碳水平可能会增强这种关键的海洋固生物的活性.
了解这些反应对于预测未来的海洋生物地化学至关重要.

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