文章摘要
杨丽丽,刘其根.鲢鳙占优势的千岛湖浮游动物群落结构特征及其与环境因子的相关性[J].水产学报,2013,37(6):894~903
鲢鳙占优势的千岛湖浮游动物群落结构特征及其与环境因子的相关性
Community structure of zooplankton and its relation to environment factors in silver carp and bighead carp dominated Qian dao lake
投稿时间:2011-11-18  修订日期:2012-05-07
DOI:10.3724/SP.J.1231.2013.37834
中文关键词: 浮游动物,垂直分布、溞属、鲢鳙鱼、环境因子
英文关键词: zooplankton, vertical distribution, Daphnia sp. silver carp and bighead carp,environment factor
基金项目:基金项目:国家自然科学基金(31072218)资助
作者单位E-mail
杨丽丽 上海海洋大学 yanglilytjac@126.com 
刘其根 上海海洋大学 qgliu@shou.edu.cn 
摘要点击次数: 1986
全文下载次数: 2087
中文摘要:
      2007年-2008年,通过调查千岛湖浮游动物的群落结构及其与环境因子的关系,共鉴定出浮游动物115种,其中原生动物16种、轮虫51种、枝角类23种、桡足类25种;浮游动物现存量两年的季节变化为:浮游动物密度在两年中的春季都形成高峰,2007年5月密度为840.9 ind./L,2008年6月密度为850.5 ind./L;生物量在两年中的春秋季节形成双高峰,2007年、2008年的5月和9月生物量分别为1.89 mg/L,1.63 mg/L和0.837 mg/L、0.802 mg/L;浮游动物现存量的水平分布为从河流区至湖泊区依次递减;浮游动物密度的垂直分布为:河流区(1号点)和过渡区(4号点)的浮游动物密度都于水深4米时达最大值,分别为为830.0 ind./L、349.0 ind./L,湖泊区于水深8米时达到最大值,为335.9 ind./L。大型浮游甲壳动物优势种透明溞、蚤状溞、球状许水蚤等和小型浮游甲壳动物优势种长额象鼻溞、颈沟基合溞、台湾温剑水蚤等在各个位点4-12米水层生物量较高。影响浮游动物生态特征分布的环境因子很多,溶解氧与原生动物、桡足类呈显著的正相关性,总氮、硝酸盐、浮游植物生物量与轮虫、枝角类呈极显著的正相关性;典范对应分析(CCA)表明: 大部分原生动物优势种恩茨筒壳虫(Tintinnidium entzii)、淡水筒壳虫(T.fluviatile),浮枝角类的透明溞(Daphnia hyalina)等与溶解氧(DO)呈正相关性,与水温呈负相关性;轮虫中的缘板龟甲轮虫 (Keratella.tcinensis),枝角类的简弧象鼻溞(Bosmina coregoni)、长额象鼻溞(B.longirostris)等与总氮、总磷、氨氮、硝酸氮呈正相关性;奇异六腕轮虫(Hexarthra.mira)、短尾秀体溞(Diaphansoma brachyurum)与叶绿素a(Chla)呈正相关性;大部分桡足类如广布中剑水蚤(Mesocyclops leuckarti)、特异荡镖水蚤(Neutrodiaptomus incongruens)与水温呈正相关性。透明溞在2-6月份主要受到以浮游植物为食物的上行效应的影响较大,而其他月份主要受水温的影响较大。
英文摘要:
      From 2007 to 2008, a monthly investigation was conducted to study the zooplankton community structure and water environmental factors in Qiandao Lake. A total of 115 species of zooplankton were identified including 4 groups i.e. Protozoa (16 species), Rotifer (51 species), Cladocera (23 species) and Copepoda (25 species). Horizontal and temporal distributing characters of zooplankton communities were analyzed. Density of zooplankton presented a pattern of single peak in spring in two years ,peaked at 840.9 ind./L in May 2007, 850.5 ind./L in june 2008 separately; Biomass of zooplankton presented two-peak in spring and autumn , peaked at 1.89 mg/L in May 2007, 0.837 mg/L in August 2007, 1.63 mg/L in May 2008年、0.802 mg/L in August 2008. Densiey and biomass of zooplankton decreased sequentially as the following order:river region > transition zone > lake region . According to the variety in vertical distribution,density of zooplankton were distributed throughout every layer of water body, reaching the biomass maximum at the depth of 4 meter in river region(sampling 1 ) and transition zone (sampling 4) , and reaching the biomass maximum at the depth of 8 meter in lake region (sampling 9) .The significant factors affecting zooplankton distribution were DO, CODMn, water temperature, TN, NO2-N, TP, NO3-N. Biomass of Protozoa and Copepod were positively correlated with DO, the biomass of Rotifer and Cladocera were positively correlated with TN, NO3 and the biomass of phytoplankton.Canonical correspondence analysis ( CCA) was applied to explore the relationship between variation of dominant species of zooplankton and environmental factors. The results showed that certain species, such as Tintinnidium entzii,T.fluviatile,Daphnia hyalina were positively associated with DO as well as negatively associated with water temperature. Among other species, Keratella.tcinensis,Bosmina coregoni,B.longirostris were correlated positively with TP,TN,NH3-N ,NO3- while Hexarthra.mira, Mesocyclops leuckarti were showed positive correlation with Chla. Most Copepoda such as Mesocyclops leuckarti, Neutrodiaptomus incongruens were positively associated with water temperature. Meanwhile, the biomass of Daphnia was positively correlated with biomass of phytoplankton from February to june, negatively correlated with water temperature in other month.
HTML   查看全文   下载PDF阅读器
关闭

手机扫一扫看