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引用本文:黄珂,李慧明,徐少林,林秋奇,韩博平.不同水力调度模式的两座调水型水库轮虫群落结构的比较.湖泊科学,2019,31(3):853-861. DOI:10.18307/2019.0323
HUANG Ke,LI Huiming,XU Shaolin,LIN Qiuqi,HAN Boping.Comparative analysis of rotifer community structures in two pumped-storage reservoirs with different retention times. J. Lake Sci.2019,31(3):853-861. DOI:10.18307/2019.0323
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不同水力调度模式的两座调水型水库轮虫群落结构的比较
黄珂, 李慧明, 徐少林, 林秋奇, 韩博平
暨南大学水生生物研究中心, 广州 510632
摘要:
为了解水力调度对轮虫群落结构的影响,于2016年8月-2017年7月对调水水源相同而水力调度模式不同的两座水库(直流型水库和中等水力滞留时间水库)的轮虫种类、生物量及环境因子进行逐月观测.两座水库中共鉴定出轮虫37种,常见属为臂尾轮属(Brachionus)、异尾轮属(Trichcerca)、龟甲轮属(Keratella)、三肢轮属(Filinia)和多肢轮属(Polyarthra),它们的种类数分别占直流型水库和中等水力滞留时间水库所检出轮虫总种类数的58%和64%.两座水库轮虫种类虽基本一致,但轮虫优势种(相对生物量大于10%)有较大差异.直流型水库轮虫优势种以角突臂尾轮虫(Brachionus angularis)、镰状臂尾轮虫(B.falcatus)、裂足臂尾轮虫(B.diversicornis)、剪形臂尾轮虫(B.forficula)、截头皱甲轮虫(Ploesoma truncatum)、尖尾疣毛轮虫(Synchaetidae stylata)和真翅多肢轮虫(Polyarthra euryptera)为主;中等水力滞留时间水库主要以卜氏晶囊轮虫(Asplanchna brightwelli)、裂足臂尾轮虫(B.diversicornis)和镰状臂尾轮虫为轮虫优势种.两座水库Bray-Curtis相异系数为0.42~0.77,表明轮虫群落结构差异较大.冗余分析表明,叶绿素a浓度和温度是影响两座水库轮虫群落结构的重要因素.两座水库轮虫群落结构的Bray-Curtis相异系数与基于叶绿素a浓度和水温的环境欧氏距离呈显著正相关(Radj2=0.426,P<0.05).结果表明,虽然具有相同的调水水源,但由于两座水库的水力调度不同,叶绿素a浓度和水温有显著差异,轮虫群落结构趋于相异.
关键词:  调水水库  轮虫  多样性  群落结构  相异系数
DOI:10.18307/2019.0323
分类号:
基金项目:国家自然科学基金项目(41573062)和广东省科技计划项目(2016A030313098)联合资助.
Comparative analysis of rotifer community structures in two pumped-storage reservoirs with different retention times
HUANG Ke, LI Huiming, XU Shaolin, LIN Qiuqi, HAN Boping
Institute of Hydrobiology, Jinan University, Guangzhou 510632, P.R.China
Abstract:
In order to determine the influence of hydraulic regulation and environmental variables on rotifer community structure in pumped-storage reservoirs sharing the same water input but different hydraulic conditions, a through-flowing reservoir and an intermediate retention time reservoir were intensively sampled from August 2016 to July 2017. A total of 37 species of rotifers were identified. Common species in both reservoirs are from the genus Brachionus, Trichocerca, Keratella, Filinia and Polyarthra accounting for 58% and 64% of the total rotifer species in the through-flowing reservoir and the intermediate retention time reservoir, respectively. Although the species composition of the two reservoirs are quite similar, the dominant species were different. B. angularis, B. falcatus, B. forficula, B. diversicornis, P. euryptera, Synchaetidae stylata and Ploesoma truncatum dominated in the through-flowing reservoir; while Asplanchna brightwelli, B. diversicornis and B. falcatus dominated in the intermediate retention time reservoir. The Bray-Curtis dissimilarity of rotifer community structure for the two reservoirs is from 0.42 to 0.77. Redundancy analysis showed that chlorophyll-a and water temperature were the most important environmental variables explaining the variation of rotifer communities in the two reservoirs. The Bray-Curtis dissimilarity was significantly positively correlated with the environmental Euclidean distance based on chlorophyll-a concentration and water temperature (Radj2=0.426, P<0.05). The results indicated that although they have the same water input, chlorophyll-a concentration and water temperature are significantly different due to the distinct hydraulic conditions of the two reservoirs resulting to differences in their rotifer community structure.
Key words:  Pumped-storage reservoir  rotifer  diversity  community structure  dissimilarity
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