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近2000年来杭州西湖藻类种群的演替与富营养化的发展过程
引用本文:项斯端,吴文卫,黄三红,陈丽娟,姚敏.近2000年来杭州西湖藻类种群的演替与富营养化的发展过程[J].湖泊科学,2000,12(3):219-225.
作者姓名:项斯端  吴文卫  黄三红  陈丽娟  姚敏
作者单位:浙江大学生命科学学院 杭州 310012
基金项目:国家自然科学基金项目!(39370 140 )
摘    要:于1991年在西湖底作15个深度1m左右的钻孔,根据其内微分石藻的垂直分布探索西湖近2000年藻类种群的演替,并藉此反映湖泊的古生境及其富营养化发展的历程,结果显示淡水西湖形成后藻类的垂直分布由下而上可分为3带:(1)附生藻带(短缝藻-桥穹藻-异极藻组合):-85cm至-45cm,以喜酸性及真酸性的附生藻为主,适应于当时的沼泽生境。(2)附生藻向浮游藻过渡带(水花束丝藻-直链藻组合):通常在-30

关 键 词:杭州西湖  藻类  种群  演替  富营养化
收稿时间:1999/8/15 0:00:00
修稿时间:1999年8月15日

Algae Species Succession and Trophic Developing Process During the Past 2000 Years in the West Lake, Hangzhou
XIANG Siduan,WU Wenwei,HUANG Sanhong,CHEN Lijuan and YAO Min.Algae Species Succession and Trophic Developing Process During the Past 2000 Years in the West Lake, Hangzhou[J].Journal of Lake Science,2000,12(3):219-225.
Authors:XIANG Siduan  WU Wenwei  HUANG Sanhong  CHEN Lijuan and YAO Min
Institution:College of Life Science, Zhejiang University, Hangzhou 310012, China,College of Life Science, Zhejiang University, Hangzhou 310012, China,College of Life Science, Zhejiang University, Hangzhou 310012, China,College of Life Science, Zhejiang University, Hangzhou 310012, China and College of Life Science, Zhejiang University, Hangzhou 310012, China
Abstract:Fifteen One meter deeped cores were drilled in West Lake, Hangzhou, in 1991. The vertical distribution of microfossil algae in the sediment were analyzed, in order to study the algae succession and trophic developing process of West Lake. Three zones were divided as follows: (1) Epiphytic algae zone ( Eunotia spp. Cymbella spp. Gomphonema spp. assem.):-85cm to -45cm deep, mainly made up of acidobiotic and acidophilous species which were suitable for the bog stage in 2000 years ago. (2) Transitive zone from epiphytic algae to phytoplankan ( Aphanizomenon flos aquae Melosira spp. assem.):usually existed in a depth between -30cm to -40cm, consisted of indifferent species combining with some alkaliphilous species, indicating that the lake had entered into mesotrophic stage. (3) Phytoplankton zone ( Fragilaria construens var. venter Scenedesmus quadricauda Lyngbya contorta assem.): At the depth of -30cm and above alkaliphilous species became the dominant species and its density were increased indicating that the lake had been entered into eutrophic stage. Around the depth of -10cm, the density of microfossil algae reached the peak value, representing a hypertrophic stage of West Lake. At the depth of -10cm and above, the density of microfossil algae were decreased, which maybe relative to the government's comprehensive control of eutrophication after 1980.
Keywords:Microfossil algae  epiphytic algae  phytoplankton  acidophilous species  alkaliphilous species  trophic state  West Lake(HangzhoP
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