白家河浮游藻类群落结构特征及水质评价

Community Structure Characteristics of Planktonic Algae and WaterQuality Evaluation in the Baijia River

白家河是嘉陵江的支流,也是天水市水量较大且有代表性的河流。本研究采集水样,测定其水质理化指标,调查白家河水中浮游藻类丰度和群落结构特征,并开展水质评价。结果表明,白家河水质偏碱性,水质处于Ⅱ类至Ⅲ类的水平。经分类鉴定,白家河浮游藻类为5门、27属、57种。浮游生物多样性评价显示,白家河水质为中度污染。本研究可以明确浮游藻类群落结构特征和水质状况,为水生态保护及长江禁捕效果评估提供基础数据支持。

The Baijia River is a tributary of the Jialing River and a representative river with a large water volume in Tianshui city.This study collects water samples,measures their water quality physicochemical indicators,investigates the abundance and community structure characteristics of planktonic algae in the Baijia River water,and conducts water quality evaluation.The results indicate that the water quality of Baijia River is slightly alkaline,and the water quality is at the level of ClassⅡto ClassⅢ.After classification and identification,the planktonic algae in Baijia River are classified into 5 phyla,27 genera,and 57 species.The evaluation of plankton diversity shows that the water quality of Baijia River is moderately polluted.This study can clarify the community structural characteristics of planktonic algae and water quality status,thus providing basic data support for water ecological protection and effectiveness evaluation of the Yangtze River fishing ban.