太湖北部湖滨带芦苇湿地夏季水质时空变化特征分析  

Temporal and spatial changes of water quality in phragmites australis wetlands of the northern lakeshore of Taihu Lake in summer.

作　　者：吕家铭 杨桂军[3] 邵克强[1,2] 高光 汤祥明[1,2] LV Jia-ming;YANG Gui-jun;SHAO Ke-qiang;GAO Guang;TANG Xiang-ming(State Key Laboratory of Lakes and Environment,Nanjing Institute of Geography and Limnology,Chinese Academy of Sciences,Nanjing 210008,China;College of Resourses and Environment,University of Chinese Academy of Sciences,Beijing 100190,China;School of Environment and Civil Engineering,Jiangnan University,Wuxi 214122,China)

机构地区：[1]中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室,江苏南京210008 [2]中国科学院大学资源与环境学院,北京100190 [3]江南大学环境与土木工程学院,江苏无锡214122

出　　处：《环境生态学》2024年第3期99-106,共8页Environmental Ecology

基　　金：江苏省碳达峰碳中和科技创新专项资金项目(BK20220018);无锡市太湖蓝藻治理科研项目联合资助。

摘　　要：为了解太湖北部湖滨带芦苇湿地夏季水质时空变化,于2022年6—9月,在芦苇湿地时空分布调查的基础上,分别采集典型湖滨带芦苇湿地表层水体样品,测定pH、总氮(TN)、总磷(TP)、氨氮(NH+4-N)、高锰酸盐指数(COD Mn)、叶绿素a(Chl-a)等水质理化指标,并对湿地水质时空变化特征和水体富营养化状态进行分析。结果表明,所调查的7片芦苇湿地中pH、溶解氧(DO)、电导率(EC)、水温(WT)月间变化差异均极显著(p<0.01),COD Mn月间差异显著(p<0.05),但TN、TP、NH+4-N和Chl-a月间变化无显著差异(p>0.05)。所有水质理化指标在竺山湾、月亮湾、梅梁湾和贡湖湾芦苇湿地间均具有显著差异性(p<0.05)。湿地夏季水体基本呈中度或重度富营养化状态,时间上8月水质最差,地理位置上月亮湾最差。太湖北部湖滨带芦苇湿地水体属于磷限制型,限制磷元素的输入可有效控制湖滨带苇区水体富营养化的程度。In order to understand the temporal and spatial changes of summer water quality in reed wetlands along the northern lake,surface water samples of typical reed wetlands along the lake shore were collected from June to September in 2022 based on the investigation of the temporal and spatial distribution of reed wetlands.Water quality physicochemical indexes such as pH,TN,TP,NH+4-N,COD Mn,and Chl-a were determined,and the spatio-temporal variation characteristics of wetland water quality and the eutrophication state of water were analyzed.The results showed that the variation of pH,DO,EC and WT among the 7 reed wetlands was very significant(p<0.01),COD Mn had significant difference between months(p<0.05),but TN,TP,NH+4-N and Chl-a showed no significant difference between months(p<0.05).All water quality physicochemical indexes were significantly different among Zhushan Bay,Yueliang Bay,Meiliang Bay and Gonghu Bay reed wetlands(p<0.05).In summer,the water body of wetland showed moderate or severe eutrophication,the water quality was the worst in August,and the Yueliang Bay was the worst in geographical position.The reed wetland in the northern lakeside zone of Taihu Lake belongs to the phosphorus limiting type,and limiting the input of phosphorus can effectively control the eutrophication degree of reed area.

关 键 词：太湖 芦苇湿地 水质评价 综合营养状态指标法 时空变化 

分 类 号：X52[环境科学与工程—环境工程]