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Which best defines an ecological 'sink' population in met... | QuestionStock

Representative image for question: Which best defines an ecological 'sink' population in metapopulation theory?

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Nature

Which best defines an ecological 'sink' population in metapopulation theory?

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Which best defines an ecological 'sink' population in metapopulation theory?

Options:

A population that cannot sustain itself without immigration
A population with higher birth than death rates
A population that increases by emigration only
A permanently isolated population

Correct answer: A population that cannot sustain itself without immigration

Explanation: A sink population has local birth rates lower than death rates and persists only with net immigration; the formal source–sink concept was articulated in ecological literature around 1988.

Created 2026-03-10T17:17:31.724Z. Updated 2026-03-10T17:17:31.724Z.