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Ecology (Demographics (Demography (COHORT (group individuals, study same…
Ecology
Demographics
Demography
study statistics
birth, death and migration
COHORT
group individuals
study same age birth-death
Life table
survival and reproductive rates
specific age group
same population
Survivorship curve
plot proportion of cohort
alive at each age
TYPES
TYPE 2
low death rates early and middle
death increases older ages
TYPE 3
long life for those who survive die-off period
high death rates for young
TYPE 1
constant death rate throughout life
Population
Density
number of individuals
per unit
Density Dependent
birth & death rates
depend on pop density
DENSITY DEPENDENT REGULATION
Disease
Predation
Competition for resources
Territoriality
Intrinsic Factors
Toxic Factors
Density Independent
birth and death rates
do not depend on pop density
Dispersion
