A dome-shaped recruitment curve arises when:
“Undercompensating density-dependence occurs” for a dome-shaped recruitment curve arises when. 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—“Mortality is constant”, “Density-dependence is lowest at intermediate density”, “No feedback exists”—refer
Ref: Campbell Biology, Urry et al., 12th Ed., Unit 8 Ecology