Review on the role of terrestrial aquatic photosynthesis in the global carbon cycle

	Review on the role of terrestrial aquatic photosynthesis in the global carbon cycle
	Zaihua Liu
	2013
发表期刊	Procedia Earth and Planetary Science
卷号	7 期号:3-4 页码:513-516
摘要	Approximately 50% of the photosynthesis on Earth each year occurs in aquatic environments. Therefore, aquatic carbon fixation is particularly relevant in the regulation of the global climate. However, previous work concentrated mainly on the role of ocean aquatic photosynthesis in the uptake of CO2 and/or HCO3-. Here, it is shown that the role of terrestrial aquatic photosynthesis in the CO2 uptake, which utilizes dissolved inorganic carbon (DIC) by rock weathering to form the autochthonous organic carbon, and thus decreases the CO2 release to atmosphere from terrestrial aquatic systems, should not be neglected in global budgeting in the carbon cycle. The magnitude of this carbon sink may account for a few hundred million tons of carbon per year, and might increase with the rise in DIC caused by global warming and anthropogenic activities. The finding that terrestrial aquatic photosynthesis results in the storage of significant amounts of DIC (CO2) has broad implications. It indicates that the rock weathering-related carbon sink is largely underestimated if only the DIC concentrations at river mouths are considered, and transformation of DIC to autochthonous TOC is neglected. It also indicates that the atmospheric CO2 sink due to carbonate weathering might be significant in also controlling long-term climate changes, due to the substantial production and burial of autochthonous organic carbon. This challenges the traditional point of view that only the chemical weathering of Ca-silicate rocks might potentially control long-term climate change.
关键词	Rock Weathering Terrestrial Aquatic Photosynthesis Dic Fertilization Autochthonous Organic Carbon Burial Water-rock- Gas-organism Interaction Global Carbon Cycle
学科领域	环境地球化学
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/352002/5050
专题	环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文
推荐引用方式 GB/T 7714	Zaihua Liu. Review on the role of terrestrial aquatic photosynthesis in the global carbon cycle[J]. Procedia Earth and Planetary Science,2013,7(3-4):513-516.
APA	Zaihua Liu.(2013).Review on the role of terrestrial aquatic photosynthesis in the global carbon cycle.Procedia Earth and Planetary Science,7(3-4),513-516.
MLA	Zaihua Liu."Review on the role of terrestrial aquatic photosynthesis in the global carbon cycle".Procedia Earth and Planetary Science 7.3-4(2013):513-516.

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