在红色珊瑚藻中,在化和光合作用之间有效的碳循环
J Mao1, H L Burdett2,3, N A Kamenos2,3
1State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Institute of Marine Microbes and Ecospheres, Xiamen University , Xiamen, People's Republic of China.
Biology letters
|June 18, 2024
概括
红珊瑚藻在光合作用和化过程中有效地回收碳. 这种高效的内部回收表明,它们的二氧化碳排放可能比之前的假设要少,这将影响蓝色碳的核算.
科学领域:
- 海洋生物学 海洋生物学
- 生物地质化学生物地质化学
- 藻类生理学 藻类生理学
背景情况:
- 红珊瑚藻形成了巨大的珊瑚礁生态系统,提供了关键的生态系统服务.
- 它们的生理过程,特别是碳循环,尚未完全理解.
- 这些藻类的碳生产和封存之间的平衡是它们在海洋碳储存中的关键作用.
研究的目的:
- 为了研究红色珊瑚藻*Boreolithothamnion soriferum*中的光合作用和化之间的生理联系.
- 要量化碳循环过程在这个关键的海洋生态系统工程师.
- 重新评估化藻类对海洋二氧化碳排放和蓝色碳核算的贡献.
主要方法:
- 使用双放射性同位素追踪来追踪碳路径.
- 测量了隔离二碳酸盐 (HCO3-) 融入骨碳酸盐和有机物质的含量.
- 在光合作用过程中量化二氧化碳的转化和内部循环.
主要成果:
- 38%的被隔离的HCO3-形成碳酸骨,39%通过光合作用被纳入有机物质.
- 只有38%的被封存的HCO3-被转化为二氧化碳,近40%被内部回收.
- 净碳排放量减少到总吸收量的23%,证明了高效的碳回收.
- 化速率高度依赖光合作用基质的生产,证实了光合作用增强的化.
结论:
- 红色珊瑚藻 (Boreolithothamnion soriferum) 在光合作用和化之间表现出高效的内部碳循环.
- 这种生理学显著减少了二氧化碳净排放,挑战了关于它们在海洋二氧化碳生产中的作用的先前假设.
- 这些发现支持重新评估化藻类对蓝色碳核算和海洋碳储存的贡献.
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