浙江浦阳江大型底栖无脊椎动物物种多样性和生态功能恢复研究

为科学评估河流修复效果,研究修复河流中底栖动物物种多样性和生态功能恢复特征,以浙江省浦江县浦阳江干流为研究对象,分别对2个近自然河段、2个城区修复河段和3个郊区修复河段在修复后1,3,4和5年的水质和底栖动物恢复状况进行调查研究.采用广义最小二乘法(GLS)模型探索底栖动物物种多样性(总物种丰富度、EPT丰富度和Sha...

A Study on Recovery of Macroinvertebrate Species Diversity and Ecological Function in Puyangjiang River, Zhejiang Province

Puyangjiang river,which locates in Zhejiang Province,was chosen as research object to scientifically evaluate the effect of river restoration,and to study macroinvertebrates species diversity and ecological function restoration characteristics.The research focused on the water quality and the restoration status of benthos of the surveyed reaches,including 2 near-natural reaches,2 restored reaches in urban area and 3 restored reaches in rural area,and 1years,3 years,4 years and 5 years later after the involved sections were restored.Generalized least squares(GLS)model was adopted to study how the Benthic animal species diversity(total species richness,EPT richness and Shannon Wiener diversity)and functional diversity indices(functional richness,functional evenness and Rao’s quadratic entropy index)is correlated with recovery years and the types of restored reach.Our results revealed the concentration of NH 3-N and TP after restoration was significantly improved(p<0.001)and the species diversity and functional diversity of benthic communities enhanced in the restored reaches and the whole surveyed stream segment with increase of restoration years.Moreover,GLS model demonstrated that the years of restoration played a more important role than the types of restoration in the effect of river restoration,and suburban reach played a significant and positive role in RaoQ(p<0.001).Our study indicates the restoration years and types of disturbance are two important factors that affect recovery of macroinvertebrate species diversity and functional diversity in restored reaches.