安宁河流域夏季底栖动物多样性及其空间分布格局  

Diversity and spatial distribution pattern of benthic macroinvertebrates in summer in the Anning River Basin

作　　者：马宝珊[1] 魏开金[1] 徐进[1] 徐滨[1] 朱祥云[1] MA Bao-shan;WEI Kai-jin;XU Jin;XU Bin;ZHU Xiang-yun(Yangtze River Fisheries Research Institute,Chinese Academy of Fishery Sciences,Wuhan 430223,China)

机构地区：[1]中国水产科学研究院长江水产研究所,武汉430223

出　　处：《生态学杂志》2021年第12期4020-4028,共9页Chinese Journal of Ecology

基　　金：国家自然科学基金项目(51809280)资助。

摘　　要：为了解安宁河底栖动物空间分布格局及其关键驱动因子,于2018年6—7月对安宁河干支流的底栖动物进行了调查,并分析了河流纵向梯度下的底栖动物空间格局。结果表明:共检出底栖动物5门34科57种,其中水生昆虫最多(44种);安宁河干流物种丰富度低于支流;干流优势种为霍甫水丝蚓(Limnodrilus hoffmeisteri)、四节蜉(Baetissp.)、纹石蛾(Aethalopsychesp.)和尖膀胱螺(Physa acuta),支流优势种为短脉纹石蛾(Cheumatopsyche sp.)、弯握蜉未定种1(Drunellasp1)、扁蜉(Heptageniasp.)和角石蛾(Stenopsychesp.);安宁河干支流底栖动物的密度较为接近;沿"上游-下游"纵向梯度,安宁河干流底栖动物密度呈下降趋势。典型对应分析(CCA)结果显示,安宁河底栖动物优势种的密度与水温、pH和底质类型密切相关。To understand the spatial distribution pattern and key driving factors of benthic macroinvertebrates,surveys were conducted in the Anning River and its tributaries between June and July 2018.The spatial pattern of benthic macroinvertebrates along the longitudinal gradient of the river was analyzed.In total,57 species of benthic macroinvertebrates belonging to 34 families of 5 phyla were identified,among which aquatic insects(44 species)were dominant taxa.Species richness in the mainstream of the Anning River was lower than that in its tributaries.The dominant species in the mainstream wereLimnodrilus hoffmeisteri,Baetissp.,Aethalopsychesp.and Physa acuta,while the dominant species in the tributaries wereCheumatopsychesp.,Drunella sp1,Heptageniasp.andStenopsychesp.The macroinvertebrate density in the mainstream was nearly equal to that in its tributaries,but it decreased along the longitudinal gradient from upstream to downstream.The results of canonical correspondences analysis(CCA)showed that the density of dominant macroinvertebrate species in the Anning River was closely related to water temperature,pH and substrate types.

关 键 词：安宁河 底栖动物 纵向梯度 空间分布格局 环境因子 

分 类 号：Q958.8[生物学—动物学]