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中文摘要：
人类活动导致的温室效应以及由此造成的气候变暖对草地生态系统的影响已引起人们普遍关注。草地生态系统碳循环作为陆地生态系统碳循环的重要组成,是未来陆地生物圈碳源/碳汇的关键环节之一,揭示这一作用对精确理解碳循环的过程和相关政策的制定具有重要的指导意义。本研究围绕气候变暖对草地生态系统初级生产力、土壤呼吸、凋落物输入与分解、土壤碳库的影响,探讨了草地生态系统碳循环对气候变暖响应的机制及其过程,简述了相关研究进展,提出了草地生态系统碳循环研究存在的问题和未来重点发展的方向,对草地生态系统碳循环的研究工作进行展望。
英文摘要：
Human activity-induced greenhouse effects and the impact of consequent global warming on grassland ecosystems have drawn increasing attention.Carbon cycling of grassland ecosystems is an important component in terrestrial ecosystem,and is an essential contribution to carbon sources in the terrestrial biosphere in future.It is necessary to understand the effect of carbon cycling on climate change for the prediction of terrestrial ecosystems and for relevant policy making.This paper reviews current research on the impact of global warming on net primary productivity,soil respiration,litter fall input and decomposition,and on the carbon pool of grassland ecosystems.The mechanisms and processes of grassland ecosystems in responding to global warming are discussed,existing problems in research on carbon cycling of grassland ecosystems are analyzed and possible further research is proposed.
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