地科学 [75]Frolking S, Roulet N T, Moore T R, et al. Modeling seasonal to based on ecosystem carbon cycling[]. Peggy Gross Earth Inter- annual carbon balance of I Global Biogeochem Cycles, 2002, 16(3): 1 030 [78]Williams M, Schwarz P A, Law B E, et al, An improved analysis 6]Frolking S, Roulet N T, Moore T R, et al. Modeling northern of forest carbon dynamics using data assimilation []. Global peatland decomposition and peat accumulation[]. Ecosystems, Change Biology, 2005, 11(1): 89-10 2001,45):479498 [79 Luo Y, Weng E, wu x, Gao C, et al. Parameter identifiability, [77]Potter C, Klooster S, Hiatt S, et al. Methane emissions from natu- constraint, and equifinality in data assimilation with ecosystem ral wetlands in the United States: Satellite-derived estimation models[]. Ecological Applications, 2009, 19(3): 571-574 Foreign Research Progress on Carbon Cycle in Wetland Ecosystems LUAN Jun-Wei, CUI Li-Juan, SONG Hong-Tao, WANG Yi-Fei Research Institute of Wetland, Chinese Academy of Forestry, Beijing 100091, P R China) Abstract: On the background of hydrology condition was altered by the global and human distur bance, organic carbon which was stored in wetland ecosystems at the history period would be released to the atmosphere extraordinary. Therefore, whether wetland ecosystem could still be a carbon sink received tremen dous attentions. In this paper, we briefly reviewed on the issues about evaluating the carbon sink/source func- tion of wetland ecosystem; Recent research advances in spatial and temporal variations of carbon sink/source function for wetland ecosystem; Impact factors on CH emissions in wetland ecosystems; Response mecha- nism of carbon process to global warming; as well as the modeling on carbon cycles in wetland ecosystems We consider that the carbon cycles in wetland ecosystems is an important uncertainty source of global warm- ing feedback mechanism, since that the above deficient researches. Considering the research status of carbon cycle in wetland ecosystem in China, we further proposed the key and priority scientific questions which should be focused. It is how to maintain the present carbon stocks of wetland ecosystem and enhance the func tion and potential of carbon sequestration capacity of degraded wetlands Keywords: wetland; carbon source; carbon sink; CHa; climate change; human activities 万方数据242 湿 地 科 学 lO卷 【75]Frolking S，Roulet NT’Moore TR et a1．Modeling seasonal to annual carbon balance of Mer Bleue Bog，Ontario，Canada[J]． Global Biogeochem Cycles，2002，16(3)：l 030． [761Frolking S，Roulet N T'Moore T R'el：at．Modeling northern peatland decomposition and peat accumulation[J]．Ecosystems， 2001，4(5)：479-498． 【77]Poaer C，Klooster S，Hiatt S。et a1．Methane emissions from natu． ml wetlands in t11e United States：Satellite-defived estimation based on ecosystem carbon cyclingm．Peggy Gross Each Inter￾actions，2006，10(22)：1-12． 【78]Williams M，Schwarz P A，Law B E，et a1．An improved analysis of forest carbon dynamics using data assimilation田．Global Change Biology,2005，11(1)：89—105． 【79]Luo Y'Weng E，Wu X，Gao C，et a1．Parameter identifiability, constraint,and equifinality in data assimilation with ecosyslem models[J]．Ecological Applications．2009，19(3)：571—574． Foreign Research Progress on Carbon Cycle in Wetland Ecosystems LUAN Jun-Wei，CUI Li—Juan，SONG Hong-Tao，WANG Yi-Fei (Research Institute of Wetland,Chinese Academy ofForestry，Beijing 100091，P．R．China) Abstract：On the background of hydrology condition was altered by the global warming and human distur￾bance，organic carbon which was stored in wetland ecosystems at the history period would be released to the atmosphere extraordinary．Therefore．whether wetland ecosystem could still be a carbon sink received tremen． dous attentions．In this paper,we briefly reviewed on the issues about evaluating the carbon sink／source func￾tion of wetland ecosystem；Recent research advances in spatial and temporal variations of carbon sink／source function for wetland ecosystem；Impact factors on CH。emissions in wetland ecosystems；Response mecha． nism of carbon process to global warming；as well as the modeling on carbon cycles in wetland ecosystems． We consider that the carbon cycles in wetland ecosystems iS an important uncertainty source of global warm．． ing feedback mechanism，since that the above deficient researches．Considering the research status of carbon cycle in wetland ecosystem in China，we further proposed the key and priority scientific questions which should be focused．It is how to maintain the present carbon stocks of wetland ecosystem and enhance the func￾tion and potential of carbon sequestration capacity of degraded wetlands． Keywords：wetland；carbon source；carbon sink；C}L：climate change；human activities 万方数据