Linked from
The 29 pages that link to Population ecology, each with the reason it gives.
MetapopulationNarrower topic: Each local population is one component of the larger system.
DispersalNarrower topic: Dispersal is one process shaping population distribution and dynamics.
HabitatNarrower topic: A habitat supports populations, not just isolated organisms.
Siberian tigerNarrower topic: It frames estimates of tiger abundance, reproduction, and survival.