Population Limiting Factors

Mrs. Sandy Gomez

Why do all populations eventually stop increasing?

Population Limiting Factors

Are factors that may cause population’s size to decrease.

Under ideal conditions with unlimited resources, a population will grow exponentially

Population Limiting Factors

As resources become less available, the growth of a population slows or stops.

Population Limiting Factors

The two types of population limiting factors are: Density-dependent limiting factors

Density-independent limiting factors

Density-Dependent Factors

Are limiting factors that depends on population size Some of these limiting factors are:

Competition – organisms compete for resources Parasitism and disease Predation

Density-Dependent Factors

Competition – organisms compete for resources Between members of

the same species Between members of

different species

Density-Dependent Factors

Predation – when one species feeds on another Predator – the organism

that feeds on the prey

Prey – the organism being eaten

Density-Dependent Factors

Density-Independent Factors

Affects all populations, regardless of the population size

Some of these factors are: Unusual weather – heavy storms

Natural disasters – tornado, volcanic eruption

Seasonal cycles – insects die during winter

Human activities – clear-cutting forests

Density-Independent Factors

Thanks for your attention!