Density
Dependent
Density
Independent
Density
Dependent
Density
Independent
(tends to be
(tends to be
(tends to be
(tends to be
BIOTIC)
ABIOTIC)
BIOTIC)
ABIOTIC)
Limiting Factors
Examples
Examples
Limiting Factors
Examples
Examples
Density-Dependent
Limiting Factor-a limiting
factor that DEPENDS on
population size.
*A large population would
require a higher supply
of food & water.
*Limited food & water
results in COMPETITION.
*Spread of DISEASE is
faster in dense/large
populations.
Density-INdependent
Limiting Factor-a factor that
affects all populations
REGARLESS OF THE
population size.
COMPETITION
PREDATION
UNUSUAL WEATHER
PARASITISM
DISEASE
DROUGHT
CLIMATE EXTREMES
FOREST FIRES
NATURAL DISASTERS
SEASONAL CYCLES
HUMAN DISTURBANCE:
DAMMING RIVERS,
CLEAR CUTTING
FORRESTS,
POLLUTANTS, ECT.
Density-Dependent
Limiting Factor-a limiting
factor that DEPENDS on
population size.
*A large population would
require a higher supply
of food & water.
*Limited food & water
results in COMPETITION.
*Spread of DISEASE is
faster in dense/large
populations.
Density-INdependent
Limiting Factor-a factor that
affects all populations
REGARLESS OF THE
population size.
COMPETITION
UNUSUAL WEATHER
PREDATION
PARASITISM
CLIMATE EXTREMES
DISEASE
FOREST FIRES
DROUGHT
NATURAL DISASTERS
SEASONAL CYCLES
HUMAN DISTURBANCE:
DAMMING RIVERS,
CLEAR CUTTING
FORRESTS,
POLLUTANTS, ECT.