Assessment of the south-to-north water transfers project (middle-route) on the invasion of plant species.
The South to North water transfers project will provide a new water dispersal pathway for plant invasion. The difference in flora between the water supplying area (Danjiangkou Reservoir Region, Hubei, China) and water receiving areas of the project was compared. A modified Australian and New Zealand weed risk-assessment system was used to identify vascular plants, which occur in water supplying areas but absent in water receiving areas with potential invasiveness. A secondary screening system concerning the dispersal and productive capacities was also applied for further evaluation. A total of 145 species were absent in the water receiving areas in Danjiangkou Reservoir Region, of which 40.8% were non-invasive, 43.5% required further investigation and 7 species were invasive.. The 7 species were identified as aquatic and wetland species implying that the project might influence the wetland and aquatic ecosystems in the water receiving areas.