摘要
以处于发育后期的草型富营养化湖泊白洋淀作为研究对象,检测温室气体的时空排放规律。研究表明,白洋淀湿地CH4气体排放呈现两种空间变化特征,一种以相对宏观的空间变化(湿地河口区域-湿地内部区域),一种是相对微观的湿地水陆交错带空间变化(水面区域-陆地区域)。水陆交错带区域,水面区域的甲烷排放通量大于陆地区域;河口区域甲烷排放最大通量大于中心区域,从河口区域到中心区域,CH4平均排放通量从1.15±3.20 mg m-2h-1减少到0.96±2.97 mg m-2h-1,河口区域排放相对中心区域大20.0%。白洋淀湖泊湿地甲烷的排放通量具有明显的时间特征,呈现夏季月CH4排放通量较大,春季、秋季次之,冬季最小。
TIn this paper, the Baidyangdian wetland was selected to study the temporal and spatial variation patterns of greenhouse gas emissions. The results showed that there were two spatial variations of CH4emissions in Baiyangidan wetland. Firstly, the severely polluted place(R) was about 20.0% higher than the slightly polluted place(Q). From station R to station Q, the average CH4emission value decreased from 1.15 ± 3.20 mg m-2h-1to 0.96 ± 2.97 mg m-2h-1. Secondly, from water area to land area, the CH4emission was gradually decreased and the downtrend of CH4emission was found in both two stations. CH4fluxes in the land/water wetlands also displayed a strong temporal variation. Meanwhile the freeze- thaw period was the very important time for CH4emission.
出处
《土壤通报》
CAS
CSCD
北大核心
2014年第3期579-584,共6页
Chinese Journal of Soil Science
基金
国家自然基金项目(51209231,51179207,51279213,51179206)资助
关键词
湿地
白洋淀
甲烷
温室气体
富营养化
Wetlands
Baiyangdian,Methane
Greenhouse gas
Eutrophication
