Two Kinds Of Wetland Ecosystem Carbon Exchange Response To Warming

Under the background of global warming,the temperature rise of the alpine wetland ecosystem carbon exchange to a certain extent.In order to explore the alpine wetland ecosystem carbon exchange when the temperature increasing,We make the Qinghai Lake Lake Wetland and Ulan Ike wetland as the research object,through the contrast experiment of simulated warming and nature treatment the state of the system,the determination of two kinds of wetland ecosystem carbon exchange components,ecosystem respiration(Ecosystem respiration,ER),net ecosystem exchange(Net ecosystem,exchange,NEE),water use efficiency(Water use efficiency,WUE)and transpiration rate(Ecosystem evapotranspiration,ET),analyzes the two wetland ecosystem carbon exchange in response to the warming.The main conclusions are as follows:(1)Warming on small lake wetland net carbon exchange(NEE)influence June is the boundary,the small lake wetland ecosystem net exchange temperature increase before June NEE increased,after June warming treatment to small lake wetland net ecosystem exchange NEE declined.(2)Warming on small lake wetland gross ecological productivity(GEP)influence June is the boundary,the total primary productivity of small lake wetland ecosystem when warming before June GEP decreased after June GEP increased.(3)Warming on IK Ulan alpine wetland net ecosystem exchange(NEE)effect July is the boundary,the alpine wetland ecosystem Ike Ulam net exchange temperature increase before July NEE decreased after July NEE increased.(4)The total primary productivity of alpine wetland ecosystem(GEP)in response to increasing temperature July is the limits.The Ike Ulam alpine wetland net ecosystem exchange when temperature increasing before July(NEE)increased after July(NEE)decreased.(5)The warming treatment makes small lake wetland ecosystem and Ike Ulam alpine wetland ecosystem respiration(ER)increased,the transpiration rate of ecosystem(ET)increased,so as to the ecosystem water use efficiency(WUE).(6)The two alpine wetland Small lake wetland and Ulan IK wetland ecosystemduring the whole observation period in 6-9 month NEE were negative except May,the wetland in 6-9 month the ecosystem showed carbon absorption,these two kinds of wetland ecosystem was a carbon sink.