Management and Control of Invasive Alien Plants in Cascading Hydropower Development Projects:a Case Study of the Lancang River Basin(Yunnan Section)
Cascade hydropower development represents an effective way of producing renewable energy,but the relationship between cascade hydropower development and alien biological invasions has not been given sufficient attention.Based on the field survey and data collection in the cascade hydropower development zone in the Lancang River Basin(Yunnan section),this paper investigated the species and distribution of alien invasive plants in the region.It also provides an initial analysis and exploration of the interrelationships between the cascade hydropower development and the invasion of alien plants.The results showed that a total of 202 species of invasive alien plants belonging to 51 families and 146 genera were found in the this region,of which the largest number of plants originated from the Americas(126 species,52.07%),with herbaceous invasive plants(71.78%)dominating the group,and most of the invasive plants were introduced through intentional introductions(76.23%).The risk assessment demonstrated that plants belonging to the Asteraceae,Leguminosae and Euphorbiaceae families represented the most significant potential threats to the ecosystem.Spatially,areas of invasive plant enrichment and severe ecological hazards overlap to a large extent with hydropower developed areas.The available evidence does not yet prove that hydropower development has directly led to an increase in new invasive plants,but it does contribute to some extent to the introduction and spread of invasive alien plants in the region.In addition,this paper also provides some specific recommendations for the prevention and control of invasive alien plants in the construction and operation of hydropower projects.
cascade hydropower developmentthe Lancang River Basininvasive alien plantsecological managementcontrol strategies
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