对"海洋酸化对突出的N2固定菌的复杂影响"的评论的回应
Dalin Shi1, Rong Shen2, Sven A Kranz3
1State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, Fujian, PR China. dshi@xmu.edu.cn.
概括
由于pH值下降,高二氧化碳会对三角质的生长产生负面影响,这与之前的研究结果相反. 低于最佳的生长条件可能解释了关于海洋酸化对这种蓝藻菌的影响的相互矛盾结果.
科学领域:
- 海洋微生物学
- 海洋学
- 生物地质化学
背景情况:
- 是全球重要的一种固细菌.
- * 高水平的二氧化碳可以通过海洋酸化影响海洋生物.
- * 之前的研究表明,三二氧化碳和pH值变化对三二氧化碳的反应有所不同.
研究的目的:
- 针对Hutchins等人对高CO2反应的发现.
- * 澄清pH在高CO2对*Trichodesmium*生长的影响中的作用.
- * 调查生长速度对三体对环境变化的反应的影响.
主要方法:
- 在定义的生长条件下对实验结果进行重新评估.
- 在不同的CO2和pH水平下对Trichodesmium生理学的比较分析.
- * 控制的实验室实验评估生长速度和细胞参数.
主要成果:
- 在快速生长条件下,由于pH值降低,高二氧化碳会对三体产生负面影响.
- *高二氧化碳的有益作用被同时发生的酸化所抵消.
- 与Hutchins等的差异可能源于影响生长速度的培养条件的差异.
结论:
- 海洋酸化,不仅仅是高二氧化碳,对于三反应至关重要.
- * 低于最佳的生长条件可能导致误解酸化的好处.
- 需要进一步的研究来了解三体在不断变化的海洋环境中的适应性.
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