文献类型：期刊文献

英文题名：Seasonal Dynamics of Soil Labile Organic Carbon and Enzyme Activities in Relation to Vegetation Types in Hangzhou Bay Tidal Flat Wetland

作者：Shao, Xuexin[1] Yang, Wenying[1] Wu, Ming[1]

第一作者：邵学新

通信作者：Wu, M[1]

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, Wetland Ecosyst Res Stn Hangzhou Bay, Fuyang, Zhejiang, Peoples R China

年份：2015

卷号：10

期号：11

外文期刊名：PLOS ONE

收录：;Scopus(收录号：2-s2.0-84955440303);WOS:【SCI-EXPANDED(收录号:WOS:000364433100111)】；

基金：This study was supported by the Fundamental Research Funds for the Central Nonprofit Research Institution (CAFYBB2014MA002, RISFCAF61256) and Special Fund for Forest Scientific Research in the Public Welfare (201404210). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

语种：英文

摘要：Soil labile organic carbon and soil enzymes play important roles in the carbon cycle of coastal wetlands that have high organic carbon accumulation rates. Soils under three vegetations (Phragmites australis, Spartina alterniflora, and Scirpusm mariqueter) as well as bare mudflat in Hangzhou Bay wetland of China were collected seasonally. Seasonal dynamics and correlations of soil labile organic carbon fractions and soil enzyme activities were analyzed. The results showed that there were significant differences among vegetation types in the contents of soil organic carbon (SOC) and dissolved organic carbon (DOC), excepting for that of microbial biomass carbon (MBC). The P. australis soil was with the highest content of both SOC (7.86 g kg(-1)) and DOC (306 mg kg(-1)), while the S. mariqueter soil was with the lowest content of SOC (6.83 g kg(-1)), and the bare mudflat was with the lowest content of DOC (270mg kg(-1)). Soil enzyme activities were significantly different among vegetation types except for urease. The P. australis had the highest annual average activity of alkaline phosphomonoesterase (21.4 mg kg-1 h(-1)), and the S. alterniflora had the highest annual average activities of beta-glycosidase (4.10 mg kg(-1) h(-1)) and invertase (9.81mg g(-1) 24 h(-1)); however, the bare mudflat had the lowest activities of alkaline phosphomonoesterase (16.2 mg kg(-1) h(-1)), beta-glycosidase (2.87 mg kg(-1) h(-1)), and invertase (8.02mg g(-1) 24 h(-1)). Analysis also showed that the soil labile organic carbon fractions and soil enzyme activities had distinct seasonal dynamics. In addition, the soil MBC content was significantly correlated with the activities of urease and beta-glucosidase. The DOC content was significantly correlated with the activities of urease, alkaline phosphomonoesterase, and invertase. The results indicated that vegetation type is an important factor influencing the spatial-temporal variation of soil enzyme activities and labile organic carbon in coastal wetlands.