According to the fundamental model of metapopulation dynamics, a condition required to save a species from going extinct is a colonization rate larger than the extinction rate.
Local populations are exterminated and new populations are colonized, according to Levins' original definition of metapopulation dynamics. Theoretically, these mechanisms may have a significant impact on population persistence. interspecies cohabitation, genetic diversity, and evolution.
The metapopulation as a whole may be particularly vulnerable to extinction if the rescue effect is necessary for c to exceed due to chance fluctuations in the fraction occupied; if this fraction becomes too low, will exceed c, encouraging further decline and complete extinction of the metapopulation.
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