生物多样性 ›› 2002, Vol. 10 ›› Issue (3): 305-310.DOI: 10.17520/biods.2002042

• 论文 • 上一篇    下一篇

浙江千岛湖桡足类的群落结构

李共国,虞左明   

  1. 1 (浙江万里学院生物技术研究所,  宁波 315100)
    2 (杭州市环境保护科学研究所,  杭州 310008)
  • 收稿日期:2001-07-30 修回日期:2002-04-05 出版日期:2002-08-20 发布日期:2002-08-20
  • 通讯作者: 李共国

Community structure of Copepoda in Qiandao Lake, Zhejiang

LI Gong-Guo,YU Zuo-Ming   

  1. 1 Institute of Biotechnology , Zhejiang Wanli University , Ningbo 315100 , China
    2 Institute of Environmental Protection Science , Hangzhou 310008 , China
  • Received:2001-07-30 Revised:2002-04-05 Online:2002-08-20 Published:2002-08-20
  • Contact: LI GongGuo

摘要: 1999年1~12月,研究了贫-中营养型的大型深水湖泊——浙江千岛湖浮游桡足类的群落结构,包括其种类组成、现存量动态及群落多样性。在一年的研究中,共观察到16种桡足类(5种哲水蚤、1种猛水蚤和10种剑水蚤)。根据各种桡足类(桡足幼体+成体)的年平均密度,哲水蚤的优势种为右突新镖水蚤(Neodiap tomus schmackeri)和球状许水蚤(Schmackeria forbesi);剑水蚤的优势种为一种中剑水蚤(Mesocyclops notius)和近邻剑水蚤(Cyclops vicinus)。桡足类群落平均密度46.81个/L,生物量0.126 mg/L,物种多样性指数1.54。桡足类现存量的季节变化为夏>秋>冬>春,8月份密度达98.50个/L,生物量0.333 mg/L;5月份密度仅10.70个/L,生物量0.017 mg/L。水平变化以Ⅱ号站现存量为最高,密度达80.10个/L,生物量0.289 mg/L;Ⅴ号站的密度最低,仅29.80个/L;Ⅳ号站生物量最低,0.066 mg/L。多样性指数以Ⅰ站为最高3.21,Ⅸ站最低,仅0.85。桡足类群落多样性随着水体透明度的增大呈下降的趋势。

Abstract: The community structure of copepods, including species composition, standing crops dynamics and diversities, was studied in a oligo-mesotrophic, large, deep-water lake — Qiandao Lake, Zhejiang. During one year of study, 16 species of copepods (5 Calanoida, 1 Harpacticoida and 10 Cyclopoida) were found. In terms of mean annual density of various species of copepods (copepodids+adults), the dominant species of Calanoida are Neodiaptomus schmackeri and Schmackeria forbesi, and the dominant species of Cyclopoida are Mesocyclops notius and Cyclops vicinus. The average density of copepods in the community is 46.81 ind./L, with biomass of 0.126 mg/L, and Margelef's diversity index of 1.54. The seasonal changes of standing crop of copepods is ranked summer>autumn>winter>spring, with the highest peak of copepod density (98.50 ind./L) and biomass (0.333 mg/L) in July to August, and the lowest copepod density (10.70 ind./L) and biomass (0.017 mg/L) in May. Station Ⅱ has the highest copepod density (80.10 ind./L) and biomass (0.289mg/L), station Ⅴ has the lowest copepods density (29.80 ind./L ), and station Ⅳ has the lowest copepods biomass (0.066 mg/L). Copepods diversity presents a maximum value of 3.21 in station Ⅰ,and a minimum value of 0.85 in station Ⅸ. The higher the transparency of the lake water, the lower the community diversities of Copepoda.