|关键词: 底栖动物 河流恢复 物种多样性 功能多样性 广义最小二乘法 浦阳江
|A Study on Recovery of Macroinvertebrate Species Diversity and Ecological Function in Puyangjiang River, Zhejiang Province
SHENG Tian-jin，EVANCE MBAO，WU Cong，ZHENG Shuai-shuai，XU Min，WANG Bei-xin1,2
1. College of Plant Protection, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China;2.Pujiang Environmental Monitoring Center, Jinhua, Zhejiang 322200, China
|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 NH3-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.
|Key words: Benthic macroinvertebrate Stream restoration Species diversity Functional diversity GLS Puyangjiang River