东太湖沉水植物现状及影响因子分析  

Status of Submerged Plants and Its Influencing Factors in East Lake Taihu

作　　者：徐德瑞 周杰[1] 张建华[2] 徐秀楠 吴时强[1] XU De-rui;ZHOU Jie;ZHANG Jian hua;XU Xiu-nan;WU Shi-qiang(Nanjing Hydraulic Research Institute,Nanjing 210029,China;Water Resources Department of Jiangsu Province,Nanjing 210029,China;Wujiang Water Conservancy Bureau of Suzhou City,Suzhou 215200,China)

机构地区：[1]南京水利科学研究院,江苏南京210029 [2]江苏省水利厅,江苏南京210029 [3]苏州市吴江区水务局,江苏苏州215200

出　　处：《水电能源科学》2020年第4期64-67,94,共5页Water Resources and Power

基　　金：国家科技重大专项水体污染控制与治理专项(2017ZX07203);江苏省水利科技项目(2018006,2018001);国家自然科学基金项目(51479121)。

摘　　要：为确定东太湖沉水植物生物量与环境因子的关系,通过对2013~2017年东太湖水生植物种群结构和水环境状况进行野外调查,分析了水生植物的现状和各因子对沉水植物生物量变化的影响。结果表明,采样区共发现水生植物14种,其中沉水植物6种,浮叶植物6种,挺水植物2种,生物多样性持续减少;东太湖水深先升后降,pH值、叶绿素a含量不断增加,透明度快速下降,营养盐含量变化不大,水下光照环境的恶化越来越不利于沉水植物生长;透明度、温度和pH值等影响因子对沉水植物季节生长和光合作用具有重要影响,其中透明度是影响沉水植物生物量变化的最主要因素。In order to determine the relationship between submerged plants and environmental factors in East Lake Taihu,the impacts of various factors on biomass reduction of submerged plants were studied through the investigation of aquatic plants community structure and water environments in 2013-2017.The results show that there were fourteen species of aquatic plants in the investigated area,among which there were six submerged plants,six floating plants and two emergent plants.Biodiversity has reduced significantly.Water depth increased first and then decreased;pH and chlorophyll-a increased continuously;Transparency decreased rapidly and nutrient concentrations had a little change.The deterioration of underwater lighting environment is increasingly detrimental to the growth of submerged plants.The influencing factors,such as transparency,temperature and pH,has important impacts on the photosynthesis and seasonal growth of submerged plants.Transparency is the main factor affecting the biomass change of submerged plants.

关 键 词：东太湖 沉水植物 影响因子 统计分析 

分 类 号：X713[环境科学与工程—环境工程]