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#net recruitment

2 public questions tagged with this topic.

Population Regulation

A dome-shaped net recruitment curve is due to:

A dome-shaped net recruitment curve rises at low abundance because more potential parents can produce more recruits, reaches a maximum, and then falls when crowding becomes severe. Intraspecific competition for food, space, or other resources reduces survival or reproduction at high density. The descending limb therefore records overcompensating density dependence rather than constant mortality or an absence of density effects. Population regulation concerns feedback, not mere limitation. A drought may sharply reduce numbers yet fail to push the population toward a repeatable equilibrium. Comp

Ref: Ecology: From Individuals to Ecosystems, Begon et al., 5th Ed., Ch. 5

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Population Ecology

What is the net recruitment pattern in density-dependent systems?

“Dome-shaped” for what is the net recruitment pattern in density-dependent systems. This relationship follows from the ecological mechanism represented by the terms in the item, not merely from an association between their names. Mechanistic support comes from showing how resource limitation, enemies, mate availability, or physiological stress changes demographic performance. A descriptive association alone does not establish regulation or causation. The remaining alternatives—“Sigmoidal”, “Constant”, “Linear”—refer to different states, processes, or scales and therefore do not express the sam

Ref: Campbell Biology, Urry et al., 12th Ed., Unit 8 Ecology

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