摘要
为了解包头南海湖浮游植物群落非冰封期的时空动态特征,2017年5-10月,在南海湖设置了12个监测站位,监测浮游植物时空变化,并同步监测水环境因子。结果表明,南海湖12个站位共鉴定出浮游植物146种(含变种);其中,绿藻门(Chlorophyta)59种,蓝藻门(Cyanophyta)31种,硅藻门(Bacillariophyta)37种,裸藻门(Euglenophyta)9种,金藻门(Chrysophyta)5种,黄藻门(Xanthophyta)3种,隐藻门(Cryptophyta)2种。浮游植物密度为23.35×10~6~115.59×10~6个/L;优势度分析表明,5-6月主要以绿藻占优势,优势种为四尾栅藻(Scenedesmus quadricauda)和螺旋弓形藻(Schroederia spiralis);7-9月主要以蓝藻占优势,优势种为微小平裂藻(Merismopedia tenuissima)和水花束丝藻(Aphanizomenon flosaquae);10月以绿藻和硅藻占优势,优势种为四尾栅藻和近缘针杆藻(Synedra affinis)。空间上呈现出沿进水口向湖心区逐渐递增的趋势,湖心区整体密度较高,而排污口和芦苇区处密度相对较低;冗余分析(RDA)表明,氨氮、化学需氧量、pH、叶绿素-a以及水温是影响浮游植物分布的主要水环境因子,绿藻与总氮关系密切,蓝藻主要受总磷的影响,硅藻受pH影响较大。
Nanhai Lake is the only natural lake of Baotou City,playing important roles in climate regulation,water storage and flood control,and ecological environment conservation.In this study,we explored the spatial and temporal dynamics of the phytoplankton community and its relationship with water environmental parameters during the ice-free period.The investigation was carried out at 12 stations from May to October 2017 and parameters monitored included phytoplankton species composition,species density and dominance,and water environmental factors.The aim of the study was to provide scientific evidence for water environment conservation and treatment in Nanhai Lake.A total of 146 phytoplankton species(including varieties)were identified,including 59 Chlorophyta species,31 Cyanophyta species,37 Bacillariophyta species,9 Euglenophyta species,5 Chrysophyta species,3 Xanthophyta species and 2 Cryptophyta species.Analysis showed that the dominant species varied markedly by month.Green algae dominated from May to June and the dominant species were Scenedesmus quadricauda and Schroederia spiralis.Cyanobacteria dominated from July to September and the dominant species were Merismopedia tenuissima and Aphanizomenon flosaquae.In October,green algae and diatoms were dominant,and the dominant species were Scenedesmus quadricauda(green)and Synedra affinis(diatom).Phytoplankton density was in the range of 23.35×10~6-115.59×10~6cells/L,increasing from inlet to lake center and relatively low near the sewage outlet and planted reed beds.Redundancy analysis(RDA)shows that ammonia nitrogen,chemical oxygen demand,pH,chlorophyll and water temperature were the primary water environmental factors affecting the distribution of phytoplankton.Green algae were closely related to total nitrogen,blue algae were mainly affected by the total phosphorus,and diatoms were significantly affected by pH.
作者
姜庆宏
王佳宁
李卫平
李兴
菅广林
卜楠龙
苗春林
JIANG Qing-hong;WANG Jia-ning;LI Wei-ping;LI Xing;JIAN Guang-lin;PIAO Nan-long;MIAO Chun-lin(The College of Environment&Energy Resources,Inner Mongolia University of Science&Technology,Baotou 014010,P.R.China;Inner Mongolia Engineering Research Center for Water-Saving Agriculture,Inner Mongolia Normal University,Hohhot 010022,P.R.China;Baotou City Ecological Wetland Protection Management Center,Baotou 014010,P.R.China;Baotou Nanhai Wetland Reserve Management Office,Baotou 014010,P.R.China)
出处
《水生态学杂志》
CSCD
北大核心
2020年第1期30-36,共7页
Journal of Hydroecology
基金
内蒙古包头黄河湿地生态系统国家定位观测研究站研究项目(2015-LYPT-DW-037)
国家自然科学基金(51469026)
内蒙古科技创新引导项目(KCBJ2018033)
内蒙古自然科学基金(2018LH04002).
关键词
浮游植物
水环境因子
时空动态
南海湖
phytoplankton
water environment factors
temporal-spatial dynamics
Nanhai Lake
作者简介
姜庆宏,1976年生,男,硕士,研究方向为污染物降解微生物学。E-mail:19134210@qq.com;通信作者:李卫平,1973年生,男,博士,教授,主要从事湿地生态修复研究。E-mail:sjlwp@163.com
