湖泊科学2017，Vol.29Issue(6)：1412-1420,9.DOI:10.18307/2017.0613
退水期鄱阳湖薹草(Carex cinerascens)和藜蒿(Artemisia selengensis)洲滩湿地CO2通量变化及其影响因子
Variations and impact factors of CO2 fluxes of Carex cinerascens-dominated and Artemisia selengensis-dominated wetland in Lake Poyang during drawdown periods
摘要
Abstract
By using static chamber and gas chromatography,the CO2 fluxes from Carex cinerascens-dominated and Artemisia selengensis-dominated wetland in Xingzi County(in the Northern Lake Poyang)were measured during drawdown periods (from October 2014 to May 2015).Ecosystem respiration of the two wetlands showed an obvious seasonal variations,with the minimum value in winter and the peak value in spring,and the mean CO2 flux for the Carex cinerascens-dominated and Artemisia selengensis-dominated wetland were 3291.80 and 2581.89 mg CO2/(m2 · h),respectively.The cumulative CO2 fluxes were 213.71±2.27 and 176.39± 11.48 t CO2/ha for the two wetlands during drawdown periods,respectively.Furthermore,the higher CO2 flux from Carex cinerascens-dominated wetland resulted from higher biomass.Soil temperature (5 cm) was the key factor controlling the seasonal variations of the CO2 fluxes.The temperature coefficient (Q10),an index of temperature sensitivity for respiration,was higher in Artemisia selengensis-dominated wetland,comparing to Carex cinerascens-dominated wetland.No significant correlations were found between soil moisture content and vegetation biomass and CO2 fluxes.关键词
鄱阳湖/薹草/藜蒿/生态系统呼吸/温度敏感性指数Key words
Lake Poyang/Carex cinerascens/Artemisia selengensis/ecosystem respiration/temperature coefficient引用本文复制引用
刘胜,陈宇炜..退水期鄱阳湖薹草(Carex cinerascens)和藜蒿(Artemisia selengensis)洲滩湿地CO2通量变化及其影响因子[J].湖泊科学,2017,29(6):1412-1420,9.基金项目
国家重点基础研究发展规划项目(2012CB417005)资助. （2012CB417005）
