Scale of Invasive Plant Species Key To Native Plants' Destruction
The conventional environmental wisdom is that invasive species, be they plant or animal, can easily become a destructive force for native species. And that wisdom is far from wrong. But some new research adds some nuance to the situation, explaining how and when invasive plant species overrun natives and when they do not.
"Our meta-analysis reconciles the opposing views on invaders by finding that invasive plants cause a large loss in biodiversity at small scales, but this effect essentially disappears at broader scales," explains Powell. "That is, invasive plants are much more likely to cause extinctions at local but not regional or island-level spatial scales." Furthermore, while invasive species may lead to native plant extinctions at the local-level, it may take decades, centuries, or even longer for these plant species to become extirpated at the regional or global level. (Science Daily)Read more: American Journal of Botany
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