南京林业大学学报（自然科学版）2016，Vol.40Issue(4)：29-34,6.DOI:10.3969/j.issn.1000-2006.2016.04.005
崇明东滩湿地不同植物群落下沉积物中CO2和N2O的释放动态研究
Emissions of CO2 and N2 O in sediments with different vegetation types in Chongming Dongtan wetland
摘要
Abstract
The relationship of greenhouse gases emissions and vegetation types in wetlands is becoming a hotspot with global climate changes. The present study aims to characterize the emissions of greenhouse gases in sediments with differ⁃ent vegetations community in typical coastal wetlands. Sediment samples were collected from three vegetation communities of Phragmites australis, Spartina alterniflora, the intergrowth area of the two species and mudflat ( no vege⁃tation) in Chongming Dongtan wetland. The samples were incubated for 60 days and measured the releases of CO2 and N2 O. The results showed that the total emissions of CO2 in sediments under vegetations community ( 1 066-1 105 mg/kg) were much higher than those in mudflat ((846±22) mg/kg) (P<0�05). No significant difference was found a⁃mong 3 vegetation communities. Combined with the significant positive correlation between the total emissions of CO2 andω ( TN) in sediments ( P<0�05) , the fact that can be deduced thatω( TN) in sediments rather than under the vegeta⁃tion types community acts as a key role in control of CO2 emissions from sediments. In contrast, the total emissions of N2O in sediments with Ph. australis ((0�41±0�01) mg/kg) were substantially higher than that under S. alterniflora ((0�23±0�01) mg/kg), the intergrowth area of the two species ((0�32±0�01) mg/kg) and mudflat ((0�21±0) mg/kg) , respectively. This suggested that Ph. australis possibly facilitates the production and emissions of N2 O in sedi⁃ ment in the wetland. It is worth further studying on the roles of Ph. australis for the control and evaluation of N2 O emis⁃sions in a coastal wetland.关键词
滨海湿地/沉积物/芦苇/互花米草/N2 O/CO2/崇明岛Key words
coastal wetlands/sediment/Phragmites australis/Spartina alterniflora/N2 O/CO2/Chongming Island分类
资源环境引用本文复制引用
印杰,汤逸帆,崔洪磊,韩建刚,李萍萍..崇明东滩湿地不同植物群落下沉积物中CO2和N2O的释放动态研究[J].南京林业大学学报（自然科学版）,2016,40(4):29-34,6.基金项目
国家自然科学基金项目（41375149）；国家林业公益性行业科研专项项目（201404305）；江苏省“青蓝工程”资助项目（苏教师［2016］15号）；江苏高校优势学科建设工程资助项目 （）
