海口市红城湖轮虫群落结构特征分析

The Characteristics of Rotifers Community Structure in Hongcheng Lake,Haikou City

于2016年11月、2017年3月及2017年7月对海口市红城湖的轮虫和水质因子进行了调查分析,明晰轮虫的群落结构特征。结果显示,3次样品中共鉴定轮虫18种,轮虫的密度呈现一定的时间和空间变化特征。疣毛轮虫(Synchaeta sp.)在3个月份中均为优势种;微齿角突臂尾轮虫(Brachionus angularis bidens)仅在2016年11月为优势种;圆筒异尾轮虫(Trichcerca cylindrica)、角突臂尾轮虫(Brachionus angularis)、裂痕龟纹轮虫(Anuraeopsis fissa)、晶囊轮虫(Asplanchna sp.)在2016年11月和2017年3月均为优势种;鼠异尾轮虫(Trichocerca rattus)在2017年3月和7月为优势种;热带龟甲轮虫(Keratella tropica)和十字龟甲轮虫(Keratella cruciformis)仅在2017年7月为优势种。轮虫优势种群落结构和环境因子CCA分析显示,pH值(P<0.001)和电导率(P<0.001)为显著解释性的环境变度。

It is conducted on rotifers and water quality factors in November 2016,March 2017 and July 2017.The results show that a total of 18 species of rotifers are identified,and the density of rotifershave certain characteristics of temporal and spatial changes.Synchaeta sp.is the dominant species in all three seasons.Brachionus angularis bidens can only be the dominant species in November 2016.Trichcerca cylindrica,Brachionus angularis,Anuraeopsis fissa,and Asplanchna sp.are the dominant species in November 2016 and March 2017.Trichocerca rattus is the dominant species in March and July 2017.Keratella tropica and Keratella cruciformis are dominant species only in July 2017.The dominant population structure of rotifers and the CCA analysis of environmental factors show that pH(P<0.001)and electrical conductivity(P<0.001)are significant explanatory environmental variability.