在许多太平洋岛屿上，外来动植物已经毁灭了本地物种。
Invasive animals and plants have devastated native species on many Pacific islands.
如果一种外来植物入侵了地上的动植物群落，就会改变地上群落和地下土壤群落之间的联系。
If a nonnative plant species invades an above-ground community of flora and fauna, it can alter links between the native above-ground community and the below-ground soil community.
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