小车河底栖硅藻生物的多样性

目的]探究小车河底栖硅藻的多样性和空间分布特征,以及硅藻优势种与环境因子的关系。方法]2015年6月对贵阳市小车河(阿哈水库到南明河段)10个样点采集的30个水样进行底栖硅藻调查。结果]鉴定小车河底栖硅藻为2纲6目9科22属131种(包括亚种和变种),从硅藻分布的规律来看,小车河底栖硅藻的绝对丰度在各个采样点都存在差异,且以小环藻属为优势种。通过回归分析,小车河硅藻细胞密度与水体总磷含量呈明显正相关,与水温无明显线性关系。结论]调查结果为小车河水环境监测、河流的保护与利用,以及维护生态平衡提供了理论依据。

Benthic Diatoms Biodiversity of Xiaoche River

Objective] To study the benthic diatoms biodiversity and spatial distribution of Xiaoche River, and to explore the relationship be-tween the dominant species of diatoms and the environmental factors. Method] 30 water samples from 10 sampling sites in Xiaoche River (from Aha Reservoir to Nanming River) were investigated on June 2015.Result] Benthic diatoms in Xiaoche River could be divided into 131 species, 22 genera, 9 families, 6 orders, and 2 classes ( including subspecies and varieties) .According to the law of diatom distribution, there were differences in the absolute abundance of benthic diatoms in the sampling sites of Xiaoche River.And Cyclotella was the dominant species.Regression analysis showed that diatom cell density was positively correlated to water total phosphorus ( TP) content in Xiaoche Riv-er, but had no significant linear relationship with temperature. Conclusion] Research results provide theoretical basis for the water environ-ment monitoring, river protection and utilization, and ecological environment maintenance of Xiaoche River.