Soil Cellulase Activity and Fungal Community Responses to Wetland Degradation in the Zoige Plateau, China  

作　　者：WU Li-sha FENG Su NIE Yuan-yang ZHOU Jian-hong YANG Zhi-rong ZHANG Jie 

机构地区：[1]Key Laboratory of Biological Resource and Ecological Environment of the Ministry of Education, College of Life Sciences,Sichuan University [2]State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University

出　　处：《Journal of Mountain Science》2015年第2期471-482,共12页山地科学学报（英文）

基　　金：financially supported by the National Key Technology R&D Program (Grant No. 2007BAC18B03);the Sichuan Provincial Key Technology R&D Program (Grant No. 2012SZ0045)

摘　　要：Four soil types(peat, marsh, meadow, and sandy) in the Zoige Plateau of China are associated with the severity of wetland degradation. The effects of wetland degradation on the structure and abundance of fungal communities and cellulase activity were assessed in these 4 soil types at 3 depths using DGGE(Denatured Gradient Gel Electrophoresis), q PCR(Quantitative Real-time PCR),and 3,5-dinitrosalicylic acid assays. Cellulase activity and abundance of the fungal community declined in parallel to the level of wetland degradation(from least to most disturbed). DGGE analysis indicated a major shift in composition of fungal communities among the4 soil types consistent with the level of degradation.Water content(WC), organic carbon(OC), total nitrogen(TN), total phosphorus(TP), available nitrogen(AN), and available phosphorus(AP) were strongly correlated with cellulase activity and the structure and abundance of the fungal community.The results indicate that soil physicochemical properties(WC, OC, TN, TP, AN, and AP), cellulase activity, and diversity and abundance of fungal communities are sensitive indicators of the relative level of wetland degradation. WC was the major factorinvolved in Zoige wetland degradation and lower WC levels contributed to declines in the abundance and diversity of the fungal community and reduction in cellulase activity.

关 键 词：Wetland degradation Soil cellulase Fungal community DGGE（Denatured Gradient Gel Electrophoresis） qPCR（Quantitative Real-time PCR） 

分 类 号：S154[农业科学—土壤学]