Drought and ecosystem carbon cycling
Drought and ecosystem carbon cycling
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DOI：
10.1016/j.agrformet.2011.01.018
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发表时间：
2011-07
影响因子：
6.2
通讯作者：
M. Molen;A. Dolman;P. Ciais;T. Eglin;N. Gobron;B. Law;P. Meir;W. Peters;O. Phillips;M. Rei
中科院分区：
文献类型：
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作者：
M. Molen;A. Dolman;P. Ciais;T. Eglin;N. Gobron;B. Law;P. Meir;W. Peters;O. Phillips;M. Rei
干旱作为水循环的间歇性干扰与碳循环的相互作用不同于“渐进”的气候变化。在干旱期间，植物根据物种特异性的水分利用策略在生理和结构上做出反应以防止过度的水分损失。这对光合作用的碳吸收和总生态系统呼吸的碳释放产生了影响。干旱后，土壤中的水分、有机质和养分以及植物中的碳水化合物的储存受到干扰，导致植物碳循环受到长期影响，并可能导致死亡。直接和遗留效应、死亡率以及随后的物种竞争与物种的生存策略密切相关。在这里，我们回顾了最先进的理解之间的关系土壤水分干旱和相互作用与陆地生态系统的碳循环。我们认为，植物的策略必须给予足够的作用，在全球植被模型中，如果干旱对碳循环的影响是合理的相互作用过程的方式来描述。
Drought as an intermittent disturbance of the water cycle interacts with the carbon cycle differently than the ‘gradual’ climate change. During drought plants respond physiologically and structurally to prevent excessive water loss according to species-specific water use strategies. This has consequences for carbon uptake by photosynthesis and release by total ecosystem respiration. After a drought the disturbances in the reservoirs of moisture, organic matter and nutrients in the soil and carbohydrates in plants lead to longer-term effects in plant carbon cycling, and potentially mortality. Direct and carry-over effects, mortality and consequently species competition in response to drought are strongly related to the survival strategies of species. Here we review the state of the art of the understanding of the relation between soil moisture drought and the interactions with the carbon cycle of the terrestrial ecosystems. We argue that plant strategies must be given an adequate role in global vegetation models if the effects of drought on the carbon cycle are to be described in a way that justifies the interacting processes.