The increasing aquaculture of exotic fishes and the expansion of the ornamental fish industry have increased biological invasion risk.It is of great significance to analyze the potential geographical distribution of exotic fishes to prevent and control of biological invasions.This study used MaxEnt model(based on 132 pres-ence points and nine environmental factors)to predict the geographical distribution of Gambusia affinis in Chi-na.In the same time,the environmental and ecological factors which are significant to its distribution were also explored.The results showed that:(1)The area under the model's receiver operating characteristic curve(AUC)value was 0.977,indicating that the simulation effect of the model was good.The dominant environ-mental factors affecting the geographical distribution of G.affinis are the annual average minimum water tempera-ture(39.0%),population density(32.8%),precipitation of driest month(10.2%)and altitude(9.4%);(2)The potential geographical distribution area of G.affinis in China is 175.75×104 km2,mainly located in the Pearl River Basin,Southeast River Basin,Huai River Basin,the middle and lower reaches of the Yangtze River Basin in China.Climate change is expected to increase the risk of G.affinis invasion.In order to prevent and control the invasion of G.affinis and other exotic fishes,it is recommended to improve the industry regula-tions for the trade and breeding of exotic fishes.
exotic fishbiological invasionspecies distribution modelpotential geographical distributionbiodi-versity
NETL
NSTL
维普
万方数据
