adventitious species

例句：

1. 1. The introduction of exotic plants into the local ecosystem has led to a decline in native species.
   引入外来植物到当地生态系统导致本地物种数量下降。
2. 2. The conservationists are working to protect the adventitious species that have adapted to the new environment.
   保护工作者正在努力保护那些适应新环境的非本土物种。
3. 3. The study found that some adventitious species were more likely to survive and reproduce in urban areas than in rural areas.
   研究发现，一些非本土物种在城市地区比在乡村地区更有可能生存和繁殖。