铁对海藻生长的限制可能会阻止海洋植树
Ellie R Paine1, Philip W Boyd2, Robert F Strzepek3
1Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, TAS, 7001, Australia. ellie.paine@utas.edu.au.
Communications biology
|June 6, 2023
概括
海洋大藻植林用于二氧化碳的去除需要铁. 研究表明,海藻的溶解铁需求明显高于自然可用的溶解铁,可能需要铁化肥以有效缓解气候变化.
科学领域:
- 海洋生物学 海洋生物学
- 海洋学 海洋学 海洋学
- 气候科学是气候科学.
背景情况:
- 消除二氧化碳 (CDR) 和减少排放对于减缓气候变化至关重要.
- 海洋大藻植林 (OMA) 是一个正在发展的CDR战略,涉及海上海藻种植.
- 溶解铁 (dFe) 在限制OMA中的作用被忽视了.
研究的目的:
- 为了确定限制溶解铁 (dFe) 度用于Macrocystis pyrifera的生长和生理学.
- 评估OMA在自然海洋条件下的可行性,以评估铁的可用性.
主要方法:
- 试验中将dFe添加到海洋海水中的度范围 (0.0120.2 nM).
- 监测Macrocystis pyrifera的生长,生理功能和死亡率.
- 的dFe需求与海洋环境dFe水平的比较.
主要成果:
- 在测试的dFe度下,Macrocystis pyrifera表现出生理功能受损和死亡率.
- 在典型的海洋dFe度下,海藻生长是不可持续的,dFe度大约低于所需的1000倍.
- 在M. pyrifera的生长和生存方面观察到显著的dFe限制.
结论:
- 麦克罗西斯蒂斯·皮里费拉 (Macrocystis pyrifera) 是OMA的候选物种,其溶解铁的要求很高.
- 目前海洋溶解铁水平不足以支持大规模的OMA.
- 海洋大藻植林可能需要在近海水域人工铁化肥.
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