9.1 Population Metrics Flashcards
Population
Group of individuals in the same area at the same time that rely on the same resources and interbreed with each other
Population density
Organisms per area
Population distribution
How organisms space themselves in their area
Clumped
Organisms live in groups
Clumped reasons
Clumped resources, social interactions (animals), seeds drop straight to the ground/asexual reproduction (plants)
Uniform
Organisms evenly spaced
Uniform reasons
Scarce resources, competition/territoriality, allelopathy
Random
Organisms spread randomly
Random reasons
No important social interactions, abundant resources throughout, seeds dispersed randomly
Random sampling
Sampled individuals/sampled area = total individuals/total area
Mark and recapture
Total marked/total individuals = recaptured with mark/total recaptured
