会仙湿地中心区枯水期上覆水磷酸酶活性水平分布  

Phosphase Activity and Its Horizontal Distribution of the Water Body in Central Region of Guilin Huixian Wetland During Dry Season

作　　者：陆祖军[1,2] 侯美珍[1] 梁士楚[1,2] 

机构地区：[1]广西师范大学生命科学学院,广西桂林541004 [2]珍稀濒危动植物生态与环境保护省部共建教育部重点实验室,广西桂林541004

出　　处：《广西师范大学学报（自然科学版）》2011年第1期76-81,共6页Journal of Guangxi Normal University:Natural Science Edition

基　　金：国家自然科学基金资助项目(31060120);广西自然科学基金资助项目(桂科自0991098);广西教育厅科学研究资助项目(桂教科研[2009]25号)

摘　　要：将会仙喀斯特湿地中心区划分成7个小区,于2009—2010年枯水期的早、中、晚期4次采集0.5 m深水样（每小区采样点10~15个）,分析上覆水部分水化指标和磷酸酶特性。参考太湖水体富营养化评价标准,会仙喀斯特湿地上覆水处于Ⅳ~Ⅴ级营养化状态。湿地的Ⅲ、Ⅳ小区水面积最大,两区植物组成对磷均有较好的吸附、吸收和沉淀作用,但Ⅲ小区水体磷酸酶活性远高于Ⅳ小区,说明Ⅲ小区植物组成不利于抑制内源磷的释放,因此建议湿地水生植被重建时参考Ⅳ小区的（边岸区）华克拉莎-（深水区）密齿苦草/黑藻/马来眼子菜植物种类构成模式进行。枯水期早、中期湿地上覆水磷酸酶活性与上覆水活性反应磷浓度成反比例关系,说明研究期内湿地磷酸酶活性可作为水体富营养发展趋势的预警信息之一。Some chemical parameters and phosphase activity of the overlying water in the centre of Huixian Karst Wetland were analysed by 4-time water sampling（0.5 m deep） at 7 districts（the central wetland was divided into 7 districts）（10～15 sampling points in every District） in early stage,metaphase,and late stage during the dry season from 2009 to 2010.Results of the research suggested that the overlying water body in Huixian Karst Wetland was in a eutrophic state of.Scale Ⅳ～Ⅴ,refered to the evaluation criteria of Taihu Lake water body.In this wetland,District Ⅲ and Ⅳ are the two largest ones and so their principal character is representative.The plants growing in these two districts do better in adsorption,intake or precipitation of phosphorus.But the phosphase activity of the water body in District Ⅲ is much higher than that in District Ⅳ,which shows that composition of flora species in District Ⅳ is not propitious to set free its internal phosphorus.Based on the differences in TP,SRP and phosphase activity between District Ⅲ and Ⅳ,it is suggested that the restoration of aquatic vegetation in Huixian Karst Wetland should adopt the pattern of Districtt Ⅳ：Cladium chinense（planted in the shore zone）-Vallisneria denseserrulata/Hydrilla verticillat/Potamogeton malaianus（in the ballow）.The relationship between phosphase activity and SRP is inverse proportion for the whole researched water bodies in Huixian Karst Wetland in early stage,metaphase of its dry season,which suggests that phosphase activity can work as one of the prewarning information for eutrophication tendency of the water body in this Wetland during the testing period.

关 键 词：桂林会仙喀斯特湿地 上覆水 磷酸酶活性 

分 类 号：X171.4[环境科学与工程—环境科学]