闽江河口短叶茳芏湿地及围垦养虾塘的沉积物CH4和N2O产生潜力  

CH4 and N2O production potentials of sediments in Cyperus malaccensis marsh and reclaimed shrimp pond of Minjiang River estuary

作　　者：李玲[1] 杨平[1,2,3] 谭立山 仝川 LI Ling;YANG Ping;TAN Lishan;TONG Chuan(Key Laboratory of Humid Sub-tropical Eco-geographical Process of Fujian University,Fuzhou 350007,China;School of Geographical Sciences,Fujian Normal University,Fuzhou 350007,China;Research Centre of Wetlands in Subtropical Region,Fujian Normal University,Fuzhou 350007,China;State Key Laboratory of Estuarine and Coastal Research,East China Normal University,Shanghai 200241,China)

机构地区：[1]福建师范大学湿润亚热带生态地理过程教育部重点实验室,福州350007 [2]福建师范大学地理科学学院,福州350007 [3]福建师范大学亚热带湿地研究中心,福州350007 [4]华东师范大学河口海岸学国家重点实验室,上海200241

出　　处：《生态学杂志》2020年第2期645-654,共10页Chinese Journal of Ecology

基　　金：国家自然科学基金项目(41801070,41671088)资助.

摘　　要：河口湿地围垦转化为水产养殖塘已成沿海地区一个重要的生态环境问题,深刻影响着河口地区的碳、氮生物地球化学循环。为探讨河口湿地围垦成养虾塘后对温室气体产生的影响本研究以福建省闽江河口鳝鱼滩中部的短叶茳芏(Cyperus malaccensis)沼泽湿地及围垦养虾塘为对象,于2016年5月—2017年3月通过室内厌氧培养实验测定了2个生态系统表层沉积物的甲烷(CH4)与氧化亚氮(N2O)产生潜力。结果表明:①短叶茳芏湿地和养虾塘的表层沉积物CH4产生潜力分别为0.33~215.2和0.13~9.41 ng·g-1·d-1均值分别为40.07±23.00和2.16±0.98 ng·g-1·d-1,呈现出秋季>夏季>春季>冬季的时间变化特征;②短叶茳芏湿地和养虾塘表层沉积物N2O产生潜力分别为0.43~0.80和0.45~0.84ng·g-1·d-1均值分别为0.58±0.01和0.61±0.01 ng·g-1·d-1;③短叶茳芏湿地沉积物CH4产生潜力显著高于养虾塘沉积物(P<0.01),2个生态系统表层沉积物N2O产生潜力差异不显著(P>0.05)。Reclamation of estuarine wetlands into aquaculture ponds has been an important ecoenvironment problem in coastal areas,with consequences on carbon and nitrogen cycling of estuaries.In this study,we measured methane(CH4)and nitrous oxide(N20)production potentials of the surface sediments form Cyperus malaccensis marsh and reclaimed shrimp pond in the Shanyu shoal of the Minjiang River estuary by anaerobic incubation experiment from May 2016 to March 2017.The results showed that CH4 production potentials of surface sediments from the C.malaccensis marsh and shrimp ponds varied from 0.33 to 215.2 and 0.13 to 9.41 ng·g-1·d-1,with mean values of 40.07±23.00 and 2.16±0.98 ng·g-1·d-1,respectively.CH4 production potentials in autumn and summer were higher than that in spring and winter.N20 production potentials of the sediments in the C.malaccensis marsh and shrimp ponds ranged from 0.43 to 0.80 ng·g-1·d-1 and 0.45 to 0.84 ng·g-1·d-1,with mean values of 0.58±0.01 and 0.61±0.01 ng·g-1·d-1 respectively.CH4 production potential of the sediments from C.malaccensis marsh was significantly higher than that from shrimp ponds(P<0.01).There was no significant difference in N2 O production potentials between the two ecosystems(P>0.05).

关 键 词：CH4产生潜力 N2O产生潜力 短叶茳芏 养虾塘 沉积物 闽江河口 

分 类 号：X171[环境科学与工程—环境科学]