Elton suggested species-rich communities would be more resistant to invasion than species-poor communities. This was known as the

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Elton's idea that species-rich communities are more resistant to invasion than species-poor communities is known as the Biotic Resistance Hypothesis. This concept suggests that diverse ecosystems are better at resisting the establishment of invasive species due to a variety of mechanisms, such as competition and predation, that are more prevalent in these rich communities.

Elton Suggested Species-Rich Communities Would Be More Resistant to Invasion