摘要
通过对比常德滨湖水体、沉积物营养盐含量变化,分析浮游生物群落组成,探索沉水植物恢复对城市湖泊生态环境的初步影响。结果表明:沉水植物恢复可有效降低湖泊水体中N、P等营养盐浓度,抑制藻类生长,使水体由中度富营养化转变为中营养化。沉积物中TOC、TN及TP含量较恢复前分别下降56.3%、45.2%及23.9%。沉水植物恢复后水体中浮游植物以绿藻为主,小球藻为优势种;浮游动物生物量较小,以枝角类为主。综上所述,沉水植物恢复是改善城市富营养化湖泊水体水质及生态环境的有效手段,且在不进行疏浚的条件下,沉水植物恢复仍可有效控制内源负荷。
Nutrient levels and plankton community composition were studied in Binhu Lake of Changde in order to understand the effects of submerged macrophyte restoration on the environmental and ecological quality of urban lakes. Results showed that restoration of submerged macrophyte reduced the concentrations of nitrogen and phosphorus in water effectively,inhibited the growth of algae,and turned the lake from eutrophic level to mesotrophic level. After submerged macrophyte restoration,TOC,TN and TP contents in the sediments reduced by 56. 3%,45. 2% and 23. 9%,respectively. Phytoplankton was dominated by green algae,and the Chlordella sp. was the dominant species. Zooplankton had a low biomass and was mainly cladocerans. To sum up,submerged macrophyte restoration was an effective measure for improving the water environmental and ecological quality of eutrophic urban lakes,and could control the endogenous load effectively even without dredging.
作者
黄小龙
郭艳敏
万斌
胡红娟
童莉
李小平
HUANG Xiao-long;GUO Yan-ming;WAN Bin;HU Hong-juan;TONG Li;LI Xiao-ping(Wuhan Zhongke Hydrobiological Environment Engineering Co.,Ltd,Wuhan 430071,China;Institute of Hydrobiology,Chinese Academy of Sciences,Wuhan 430072,China)
出处
《环境工程》
CAS
CSCD
北大核心
2018年第7期17-21,共5页
Environmental Engineering
基金
湖北省中国科学院科技合作专项
湖北省科技支撑计划项目(2015BCA246)
关键词
沉水植物
富营养化
沉积物
浮游生物
submerged macrophytes
eutrophication
sediment
plankton
