Biodiv Sci ›› 2021, Vol. 29 ›› Issue (10): 1336-1347.DOI: 10.17520/biods.2021130

• Original Papers: Animal Diversity • Previous Articles     Next Articles

Risk analysis of fish invasion in Haihe River Basin caused by the central route of the South-to-North Water Diversion Project

Xuejian Li1,2, Wenqiao Tang1,*(), Yahui Zhao2,*()   

  1. 1 Shanghai Universities Key Laboratory of Marine Animal Taxonomy and Evolution, Shanghai Ocean University, Shanghai 201306
    2 Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101
  • Received:2021-04-09 Accepted:2021-07-14 Online:2021-10-20 Published:2021-10-20
  • Contact: Wenqiao Tang,Yahui Zhao

Abstract:

Aims: The Haihe River Basin is one of the seven main river basins in China. It also receives water from the central route of the South-to-North Water Diversion Project. Due to the combined effect of human activity and climate change, river degradation became the primary problem of Haihe River Basin over several decades. The South-to-North Water Diversion Project can improve the environment in this river basin, but it can also bring the risk of fish invasion. Therefore, this research was conducted to assess the risk of fish invasion in Haihe River Basin caused by this project.
Methods: Based on a field investigation and an analysis of the relevant research, differences in the fish species between the water diversion area and the water receiving area (Haihe River Basin) of South-to-North Water Diversion Project were evaluated. A risk assessment system for invasion of alien fishes and an aquatic species invasiveness screening kit V2.3 were used to assess the invasion risk of fish species which are not naturally distributed in Haihe River Basin. MaxEnt model was used to predict the potential distribution of fish species with invasion risk in Haihe River Basin.
Results: The scoring results of the risk assessment system and the aquatic species invasiveness screening kit showed that Tinca tinca, Neosalanx tangkahkeii and Silurus meridionalis have a high invasion risk, and that Odontobutis sinensis, Pelteobagrus nitidus and Siniperca knerii have a medium invasion risk. According to the prediction of potential geographic distribution areas conducted by MaxEnt, the Tuhaimajiahe River system, Zhangwei south Canal, and coastal rivers around the Bohai Sea are prone to fish invasion.
Conclusions: Aquatic organisms in the water-receiving area of Haihe River Basin should be continuously monitored, especially in areas most prone to fish invasion, for fish species with high invasion risk. A specific early screening system should be established. In addition, the fish resource investigation and invasion risk assessment for the Eastern Route Project should be carried out as soon as possible.

Key words: Haihe River Basin, water diversion area, central route of the South-to-North Water Diversion Project, fish invasion, AS-ISK