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生态学杂志 ›› 2009, Vol. 28 ›› Issue (11): 2197-2201.

• 研究报告 • 上一篇    下一篇

南太湖浮游植物特征及其富营养化评价

原居林;尹文林;沈锦玉;张爱菊;赵汉取;叶金云**   

  1. 浙江省淡水水产研究所,浙江湖州 313001
  • 出版日期:2009-11-10 发布日期:2009-11-10

Phytoplankton and its relations with eutrophication of southern Taihu Lake.

YUAN Ju-lin;YIN Wen-lin;SHEN Jin-yu;ZHANG Ai-ju;ZHAO Han-qu;YE Jin-yun    

  1. Zhejiang Institute of Freshwater Fisheries, Huzhou 313001, Zhejiang, China
  • Online:2009-11-10 Published:2009-11-10

摘要: 2008年8—9月对南太湖的浮游植物进行了调查,并对9个采样点水样进行了分析。结果表明:共有浮游植物47种,隶属于7门28属,其中蓝藻门6属9种,绿藻门10属13种,硅藻门7属18种,裸藻门2属3种,隐藻门1属2种,金藻门1种,甲藻门1种;南太湖浮游植物的密度为3.56×106~7.99×106 cells·L-1;浮游植物的Shannon Weaver多样性指数为0.29~2.27,均匀度指数在多数位点<0.5,卡尔森营养状态指数(TSIM)均大于64;根据浮游植物的优势种组成、密度、多样性指数及富营养状态指数的评价结果说明南太湖处于富营养化阶段。

关键词: 水分亏缺, 补充灌水, 冬小麦, 氮素吸收, 氮素残留

Abstract: In August September 2008, an investigation was made on the phytoplankton in southern Taihu Lake, and the water quality at nine sampling sites was analyzed. A total of 47 phytoplankton species belonging to 28 genera and 7 phylums were collected, with 9 species of Cyanophyta, 13 species of Chlorophyta, 18 species of Diatoms, 3 species of Euglenophyta, 2 species of Cryptophyta, 1 specie of Chrysophyta, and 1 specie of Dinophyta. The phytoplankton density was 3.56×106-7.99×106 cells·L-1, Shannon Weaver index was 0.29-2.77, evenness was lower than 0.5, and trophic state index (TSIM) was higher than 64. Based on the evaluation of the dominant species composition, density, and ShannonWeaver index of phytoplankton, and of the TSIM, the southern Taihu Lake was considered at the stage of eutrophication.

Key words: Water deficit, Supplemental irrigation, Winter wheat, N uptake, N residue