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Population (Groups vs Individuals (schooling, herding, migrating, swarming…
Population
Groups vs Individuals
schooling
herding
migrating
swarming
flocking
hunting
protection, mating, find & share resources
fecundity
rate of reproduction
species are trying to optimize selection of their genes
low
elephants reproduce every 2-4 years
high
rabbits who reproduce every month
carrying capacity
environmentally determined max of a population
Density dependent
Biotic
predation
disease and parasites
competition for resources
waste accumulation
density independent
abiotic factors
natural disasters
can happen at any time
community
populations sharing habitat
predation
one population eats another (or herbivory)
symbiosis
parasitism
positive for parasite/negative for host
mutalism
both organism benefit
commensalism
one benefits/other indifferent
competition
competing for resources