The spatio-temporal distribution pattern and spread mode of the invasive alien species Solenopsis in-victa Buren in China
Solenopsis invicta Buren,native to South America,is one of the 100 most dangerous invasive species in the world.Since its invasion was discovered in Guangdong Province in 2004,it has caused se-rious harm to the ecological security and human health in multiple provinces of mainland China.The rapid spread of S.invicta is the key factor contributing to its harmful effects.It is urgent to study the occurrence and spread pattern in order to develop effective prevention and control measures.Based on the investigation of occurrence records and field surveys,the distribution range of S.invicta in China has been identified,and the spatio-temporal spread process from 2012 to 2021 has been reconstructed.The distribution pattern of new invasion sites in different years has also been determined.Furthermore,by us-ing join-count statistics methods,diffusion models based on different media have been constructed to iden-tify the spread modes and their driving factors of new invasion sites in different years.We found that as of 2021,S.invicta has spread to 579 counties in 12 provinces in South,Central,East,and Southwest Chi-na.The number of invaded counties has exponentially increased since 2012.S.invicta has formed patial clustered distribution pattern,and newly invaded counties showed significant spatial correlation with G324 Road,Shanghai-Kunming Expressway and public boundaries between adjacent counties(P＜0.05).This dis-tribution pattern is jointly caused by the dominant aerial mating flights of S.invicta leading to continuous or infilling spread between neighboring counties,as well as the human factors(such as nursery plant trans-portation)driving the cross-regional jumping diffusion along G324 Road and Shanghai-Kunming Express-way.Our results are of great significance for formulating and developing efficient source control and early monitoring and warning programs.
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NSTL
万方数据
