水生态学杂志Issue(2)：18-24,7.DOI:10.15928/j.1674-3075.2015.02.004
东湖通道工程对沿线水域水生植物的影响
Influence of the East Lake Channel Project on Macrophytes in Nearby Waters
摘要
Abstract
The East Lake Channel,across the famous East Lake scenic area,is an important traffic route under construction in Wuhan City and approximately 5 km is the tunnel beneath East Lake.The construction of the chan-nel disturbed lake sediments and enclosed or semi-enclosed a portion of the water and these changes could affect the macrophyte community structure.A study was carried out on the macrophyte community structure,total biomass and water quality parameters in the waters along the tunnel line in order to investigate the influence of the tunnel construction on macrophytes and to provide management options for lake administrators.The investigation was car-ried out in March and May,2014 at 16 representative sites located in enclosed waters,semi-enclosed waters,lake bays,windward areas and areas outside the new embankments.Aquatic plants were collected randomly with grass clips (0.38 m ×0.45 m)in waters 100 m away the bank.Macrophyte species were identified and wet weight de-termined.Water samples (500 mL)were collected in glass containers for laboratory determination of total nitrogen (TN),total phosphorus (TP)and ammonia nitrogen (NH +4 -N).Water temperature (WT),pH and electronic conductivity (EC)were evaluated in situ with a YSI Pro-plus multi-parameter water quality analyzer.Results show that macrophyte community was primarily affected by water temperature.When sampled on March 20,the average water temperature was 13.7℃.Three submerged macrophytes,including Potamogeton crispus,Myriophyllum spica-tum and Ceratophyllum oryzetorum,were detected,and one floating-leaved macrophyte,Nymphoides peltatum,and a little Lemna minor were also observed,but no emergent macrophytes were recorded.Among them,Potamogeton crispus was the dominant species.When sampled on May 23,the average water temperature was 24.8℃.In addi-tion to the macrophytes recorded in March,the submerged macrophyte Vallisneria natans and the floating-leaved macrophyte Trapa bicornis were also observed.Nymphoides peltatum had the highest relative biomass and was the most dominant species.The coverage and biomass of macrophytes were higher in relatively enclosed areas than those growing in areas obviously influenced by wind and waves.High biomass was always accompanied by high nu-trient concentrations.The biomass of macrophytes showed obviously positive relationship with the concentrations of TN and TP.Macrophytes were seldom observed in the waters near the newly built embankments,which was proba-bly due to the lack of seeds,deep water and low transparency in these areas.In summary,the construction of un-derwater tunnel had positive influence on macrophytes as it increased the relatively enclosed waters along the tun-nel,where the coverage and biomass of macrophytes increased significantly.However,it is necessary to prevent damage on the existing macrophytes by suspended particles and physical disturbance when the embankments are dismantled.关键词
水生植物/东湖通道工程/影响因子Key words
macrophyte/East Lake Channel Project/impact factors分类
生物科学引用本文复制引用
李双双,吕锦刚,高翔,周维成,李小燕,李敦海..东湖通道工程对沿线水域水生植物的影响[J].水生态学杂志,2015,(2):18-24,7.基金项目
东湖通道工程“重度人工干扰下水环境污染处置及综合控制关键技术研究”。 （）
