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刘同琳,陈皓若,洪陈聪,张健,马婕,陈立婧.2021.苏州城区河道后生浮游动物群落结构 与环境因子的关系.动物学杂志,56(5):674-685.
苏州城区河道后生浮游动物群落结构 与环境因子的关系
Relationship between Metazooplankton Community Structure and Environmental Factors in Suzhou Urban River
投稿时间:2020-11-17  修订日期:2021-08-18
DOI:10.13859/j.cjz.202105005
中文关键词:  浮游动物  群落结构  环境因子  生境异质性
英文关键词:Zooplankton  Community structure  Environmental factor  Habitat heterogeneity
基金项目:“十三五”水专项-苏州区域水质提升与水生态安全保障技术及综合示范项目(No. 2017ZX07205)
作者单位E-mail
刘同琳 上海海洋大学水产动物遗传育种中心上海市协同创新中心上海海洋大学海洋动物系统分类 与进化上海高校重点实验室 上海 201306 764409127@qq.com 
陈皓若 上海海洋大学水产动物遗传育种中心上海市协同创新中心上海海洋大学海洋动物系统分类 与进化上海高校重点实验室 上海 201306 790395245@qq.com 
洪陈聪 上海海洋大学水产动物遗传育种中心上海市协同创新中心上海海洋大学海洋动物系统分类 与进化上海高校重点实验室 上海 201306 549730602@qq.com 
张健 上海海洋大学水产动物遗传育种中心上海市协同创新中心上海海洋大学海洋动物系统分类 与进化上海高校重点实验室 上海 201306 1220501648@qq.com 
马婕 上海海洋大学水产动物遗传育种中心上海市协同创新中心上海海洋大学海洋动物系统分类 与进化上海高校重点实验室 上海 201306 527752279@qq.com 
陈立婧 上海海洋大学水产动物遗传育种中心上海市协同创新中心上海海洋大学海洋动物系统分类 与进化上海高校重点实验室 上海 201306 ljchen@shou.edu.cn 
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中文摘要:
      2018年1月至11月对苏州城区8个片区23个监测点的河道断面进行每两月一次的后生浮游动物(轮虫、枝角类、桡足类)定量采集和分析,共鉴定出后生浮游动物127种,其中,轮虫48种,枝角类41种,桡足类38种。苏州城区河道后生浮游动物的年度优势种共24种,优势种生态位宽度变化范围在0.25 ~ 0.84之间,不同片区之间的生境异质性导致优势种生态位重叠指数差异较大。各片区的年均后生浮游动物总密度为(315.2 ± 161.4)ind/L,年均后生浮游动物总生物量为(0.77 ± 0.27)mg/L。不同片区间的生境异质性导致后生浮游动物现存量存在差异,轮虫在各片区的密度占比均达85.3%以上,成为绝对优势类群。典范对应分析(CCA)表明,电导率、水温、溶解氧、透明度、叶绿素a、总氮和总磷是影响后生浮游动物群落结构的重要环境因子。
英文摘要:
      In order to explore the relationship between metazooplankton (Rotifers, Cladocera and Copepod) community structure and water environmental factors in Suzhou urban river, bimonthly quantitative collection and analysis of metazooplankton were carried out at 23 monitoring points in 8 urban areas of Suzhou City from January to November 2018 (Fig. 1), and the water environmental factors were determined. Metazooplankton were collected according to the national standard method and identified under microscope. A total of 127 species of zooplankton were identified, including 48 species of Rotifers, 41 species of Cladocera and 38 species of Copepod. The number of species in Shantang area was the highest, with 81 species, while in Western of the city the number was the lowest, with 49 species (Fig. 2). The water environmental factors were determined according to the national standards (Table 1), and it was found that there were some differences among different regions (P < 0.05). Using the formula to calculate the dominance (Y) of metazooplankton in Suzhou urban river, 24 species of annual dominant species (Y ≥ 0.02) were identified (Table 2). Using the formula to calculate the niche breadth (Bi) and niche overlap (Qik) of dominant species, it was found that the niche breadth was 0.25﹣0.84 (Table 2). According to this, the dominant species of metazooplankton in Suzhou urban river were divided into three niche groups, and the habitat heterogeneity between different areas led to a large difference in niche overlap (Fig. 3). The average annual total density of metazooplankton in each area was 124.1﹣626.4 ind/L (Fig. 4), with the highest in Western of the city and the lowest in Ganjiang area. Rotifers account for more than 85.3% of the total metazooplankton density in each area, making them an absolute dominant group. The annual total biomass of metazooplankton in each area was 0.49﹣1.12 mg/L (Fig. 5), with the highest in Western of the city and the lowest in Southern of the ancient city. The variation law of metazooplankton biomass in each area is not completely consistent with the change of density. Different habitats in different regions lead to differences in the current stock of metazooplankton. The metazooplankton community composition and environmental factors were subjected to detrended correspondence analysis (DCA), because the maximum gradient was more than 3, so the final selection canonical correspondence analysis (CCA) was selected for the constrained sequencing. Canonical correspondence analysis shows that electrical conductivity, water temperature, dissolved oxygen, transparency, chlorophyll a, total nitrogen and total phosphorus are important environmental factors affecting the metazooplankton community structure in Suzhou urban river.
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