摘要
为研究湖泊生态修复后小型城市湖泊不同区域水生态状况的长期响应特征,并探讨利用不同水生生物类群评价水体水生态状况的适用性,于2018年1月~2019年5月,对湖南小型城市湖泊松雅湖水质及不同水生生物类群分别进行了逐月和季度监测,并对其水生态状况进行了评价.结果显示,与生态修复之前相比,修复后松雅湖全湖相关水质指标均优于修复前,其中Chl-a和COD_(Mn)下降比例均接近90%,而TP降幅亦超过70%.对于不同水域,修复区与未修复区TN、NH_(3)-N和TP浓度均呈下降趋势,其他水质指标亦处于较低水平,变化相对较小,但大部分指标均以修复区为更优;其中,修复区COD_(Mn)含量较高可能与入湖水体输入和沉水植物残体较多有关.此外,修复区浮游植物、浮游动物以及底栖动物物种数和生物多样性指数均高于未修复区,其中浮游植物和浮游动物的密度亦高于未修复区.水生态综合评价结果显示,修复区与未修复区的水生态状况在大部分时间均表现为良好,而不同生物评价指标中以浮游动物指示种对松雅湖的评价结果最为准确,这也表明在利用单一水生生物群落对水体水生态状况进行评价时,应根据监测目的,并充分考虑不同生物类群以及水域环境的特点等来选取合适的生物类群进行评价.
This research aims to study the long-term variations on aquatic ecological state in different regions of a small urban lake after ecological restoration,and the applicability of using different aquatic organisms to evaluate water ecological state,the water quality and different aquatic communities in Songya Lake,a small urban lake in Hunan Province,this monitoring was performance monthly and quarterly from January 2018 to May 2019,and the water ecological state was evaluated.After restoration,the results showed that the water ecological status of the whole lake was better than that of before restoration.The decrease rates of Chl-a and COD_(Mn) were nearly to 90%,and for TP it was more than 70%.The concentrations of TN,NH_(3)-N and TP in the restored area and the un-restored area,all showed a decreasing trend,and the others water quality indexes were also at a low level with relatively small variation during the survey;However,most of the indexes were better in the restored area.The higher contents of COD_(Mn) in the restored area were probably related to the exogenous input and more submerged plant residues.In addition,the numbers of species and biodiversity indexes of phytoplankton,zooplankton and zoobenthos in the restoration area were higher than those in the un-restored area,and the densities of phytoplankton and zooplankton were also higher than those in the un-restored area.The evaluated results of water ecology showed that the restored area and the un-restored area performed well in most of the time.Among the different biological indexes,the zooplankton species indicators were the most accurate in Songya Lake,this finding suggested that in order to use a single aquatic biota to evaluate the water ecological state of the water body,an appropriate biota should be selected for this evaluation according to the characteristics of the water environment and the objectives pursued.
作者
苏小妹
薛庆举
万翔
谢丽强
SU Xiao-mei;XUE Qing-ju;WAN Xiang;XIE Li-qiang(Jiangsu Provincial Key Laboratory of Environmental Engineering,Jiangsu Provincial Academy of Environmental Sciences,Nanjing 210036,China;State Key Laboratory of Lake Science and Environment,Nanjing Institute of Geography and Limnology,Chinese Academy of Sciences,Nanjing 210008,China;Nanjing Institute of Environmental Science,MEE,Nanjing 210042,China)
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2022年第1期302-312,共11页
China Environmental Science
基金
国家自然科学基金资助项目(41907326,31930074)
中国科学院科技服务网络计划区域重点项目(KFJ-STS-QYZD-156)
中国博士后科学基金(2019M651754)
江苏省环境工程重点实验室开放基金(ZX2018007)
2018年太湖水污染治理省级专项资金科研课题(TH2018402)。
关键词
水质
浮游植物
浮游动物
底栖动物
松雅湖
water quality
phytoplankton
zooplankton
zoobenthos
Songya Lake
作者简介
责任作者:谢丽强,研究员,lqxie@niglas.ac.cn;苏小妹(1989-),女,河南安阳人,工程师,博士,主要从事湖泊生物学和环境毒理学研究.发表论文6篇.
