地理科学 ›› 2003, Vol. 23 ›› Issue (5): 622-628.doi: 10.13249/j.cnki.sgs.2003.05.622

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湿地生态系统碳循环研究进展

宋长春   

  1. 中国科学院东北地理与农业生态研究所, 吉林 长春 130012
  • 收稿日期:2002-07-11 修回日期:2002-12-11 出版日期:2003-09-20 发布日期:2003-09-20
  • 基金资助:
    中国科学院知识创新工程重大项目——中国陆地和近海生态系统碳收支研究(KZCX 1-SW-01);中国科学院知识创新工程重要方向项目(KZCX 3-SW-332)支持

Advance in Research on Carbon Cycling in Wetlands

SONG Chang-Chun   

  1. Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun, Jilin 130012
  • Received:2002-07-11 Revised:2002-12-11 Online:2003-09-20 Published:2003-09-20

摘要: 碳在不同类型湿地中储藏量约占地球陆地碳总量的15%。由于全球湿地面积迅速减少,湿地生态系统正常的水循环和碳循环过程产生一定的变化,湿地生态系统的演变也可能是全球大气CO2含量升高的一个不可忽视的重要因素。气候条件是湿地碳循环生物地球化学过程的重要驱动因素,湿地特殊的生态水文过程和土壤环境条件,使得湿地碳循环具有区别于其它生态系统碳循环的特征。影响湿地中碳积累与分解过程的重要控制因子是温度、水文条件和植物群落,特别是水文条件对湿地碳循环过程影响较大。湿地土壤呼吸通量与根层土壤温度呈正相关关系,并受地表积水深度和地下潜水水位的影响,另外,洪泛作用会增加湿地CO2的排放率,湿地水文过程决定溶解有机碳的输入与输出过程。

Abstract: Wetlands have an important role in storing carbon and the carbon stored in which accounts for 15% of the total terrestrial carbon storage.The area of wetlands decreased rapidly due to climatic change and human activities.The normal hydrologic cycling process and carbon cycling process have been changed and the evolution of wetlands maybe a very important factor that is responsible for the rise of global CO2.Climatic condition is the main driving factor of carbon biogeochemical cycling in wetlands.Carbon cycling in wetlands distinguishes from that in other types of ecosystems because of special eco-hydrological process and soil environment.The key factors influencing carbon accumulation and decomposition are vegetation community, temperature and hydrological conditions (especially water table).Transpiration of soil and vegetation has positive correlation with the soil temperature and increases linearly as water table decreases.Similarly, flooding can increase CO2 emission of wetlands and hydrological process of wetlands determines the input and output of dissolved organic carbon.

中图分类号: 

  • P595