Inter-basin water diversion projects have led to accelerated colonization of aquatic organisms,including the freshwater golden mussel(Limnoperna fortunei),exacerbating global biofouling concerns.While the influence of...Inter-basin water diversion projects have led to accelerated colonization of aquatic organisms,including the freshwater golden mussel(Limnoperna fortunei),exacerbating global biofouling concerns.While the influence of environmental factors on the mussel's invasion and biofouling impact has been studied,quantitative correlations and underlying mechanisms remain unclear,particularly in large-scale interbasin water diversion projects with diverse hydrodynamic and environmental conditions.Here,we examine the comprehensive impact of environmental variables on the establishment risk of the golden mussel in China's 1432-km-long Middle Route of the South-to-North Water Diversion Project.Logistic regression and multiclass classification models were used to investigate the environmental influence on the occurrence probability and reproductive density of the golden mussel.Total nitrogen,ammonia nitrogen,water temperature,pH,and velocity were identified as crucial environmental variables affecting the biofouling risk in the project.Logistic regression analysis revealed a negative correlation between the occurrence probability of all larval stages and levels of total nitrogen and ammonia nitrogen.The multiclass classification model showed that elevated levels of total nitrogen hindered mussel reproduction,while optimal water temperature enhanced their reproductive capacity.Appropriate velocity and pH levels were crucial in maintaining moderate larval density.This research presents a quantitative analytical framework for assessing establishment risks associated with invasive mussels,and the framework is expected to enhance invasion management and mitigate biofouling issues in water diversion projects worldwide.展开更多
Golden mussel Limnoperna fortunei(Dunker 1857) is a filter-collector species of fresh water mussel originating from southern China. In the water transfer tunnels from the East River to Shenzhen and Hong Kong, golden m...Golden mussel Limnoperna fortunei(Dunker 1857) is a filter-collector species of fresh water mussel originating from southern China. In the water transfer tunnels from the East River to Shenzhen and Hong Kong, golden mussels attach to the walls of pipelines and gates, causing serious biofouling, increased flow resistance, and resulted in corrosion of the tunnel wall. Golden mussel has very high environmental adaptability and may colonize habitats with low dissolved oxygen and a wide range of trophic levels. The colonization process of the species on solid surface was studied in the Xizhijiang River, a tributary of the East River and the main water resource of Shenzhen from March 2010 to April 2011. The results showed that the golden mussel completed three generations and reproduced six cohorts per year in the tropic zone. Water temperature was the controlling factor for the growth rate and maturity of each cohort. Based on the results, an ecological method for controlling the invasion of golden mussels in water transfer tunnels was proposed.展开更多
基金supported by the National Key Research and Development Program of China(grant no.2021YFC3200902 and 2021YFC3200905)the National Natural Science Foundation of China(grant no.U2243222).
文摘Inter-basin water diversion projects have led to accelerated colonization of aquatic organisms,including the freshwater golden mussel(Limnoperna fortunei),exacerbating global biofouling concerns.While the influence of environmental factors on the mussel's invasion and biofouling impact has been studied,quantitative correlations and underlying mechanisms remain unclear,particularly in large-scale interbasin water diversion projects with diverse hydrodynamic and environmental conditions.Here,we examine the comprehensive impact of environmental variables on the establishment risk of the golden mussel in China's 1432-km-long Middle Route of the South-to-North Water Diversion Project.Logistic regression and multiclass classification models were used to investigate the environmental influence on the occurrence probability and reproductive density of the golden mussel.Total nitrogen,ammonia nitrogen,water temperature,pH,and velocity were identified as crucial environmental variables affecting the biofouling risk in the project.Logistic regression analysis revealed a negative correlation between the occurrence probability of all larval stages and levels of total nitrogen and ammonia nitrogen.The multiclass classification model showed that elevated levels of total nitrogen hindered mussel reproduction,while optimal water temperature enhanced their reproductive capacity.Appropriate velocity and pH levels were crucial in maintaining moderate larval density.This research presents a quantitative analytical framework for assessing establishment risks associated with invasive mussels,and the framework is expected to enhance invasion management and mitigate biofouling issues in water diversion projects worldwide.
文摘Golden mussel Limnoperna fortunei(Dunker 1857) is a filter-collector species of fresh water mussel originating from southern China. In the water transfer tunnels from the East River to Shenzhen and Hong Kong, golden mussels attach to the walls of pipelines and gates, causing serious biofouling, increased flow resistance, and resulted in corrosion of the tunnel wall. Golden mussel has very high environmental adaptability and may colonize habitats with low dissolved oxygen and a wide range of trophic levels. The colonization process of the species on solid surface was studied in the Xizhijiang River, a tributary of the East River and the main water resource of Shenzhen from March 2010 to April 2011. The results showed that the golden mussel completed three generations and reproduced six cohorts per year in the tropic zone. Water temperature was the controlling factor for the growth rate and maturity of each cohort. Based on the results, an ecological method for controlling the invasion of golden mussels in water transfer tunnels was proposed.
