Ecosystem changes following the eradication of invasive species: Evaluation of various eradication scenarios by computer simulation

摘要: Abstract The decline of the natural ecosystem on Ogasawara Islands caused by invasive species has been an important environmental problem and projects for eradicating are currently underway. Some have proliferated in host environment affecting material cycle ecosystem. If were removed from environment, may be altered native that should protected negatively affected. After introduction alien species, namely goats rats, vegetation declined Nakoudojima Island, island belongs to Islands. Therefore, this study, a mathematical model was developed simulate analyze changes occurred following eradication rats. When only rats eradicated, island’s changed grassland but revegetation delayed biomass animal did not recover significantly. recovered increased; however, became forested many herbaceous plant extinct. eradicated simultaneously, very unstable two extreme results obtained – entire either forest or grassland. study suggest instead simply it is necessary monitor post-eradication take adaptive measures as required.