Chapter 5.2 – Limits to Growth

Daily Objectives Identify factors that determine carrying capacity. Compare the density dependent factors with the density independent factors.

Limiting Factors Something that causes population growth to decrease. Determines the carrying capacity of an environment for a species.

Limiting Factors

Density-Dependent Factors Limiting factor that depends on population size.

Density-Dependent Factors Competition – organisms compete for food, water, space, sunlight, and other things

Density-Dependent Factors 2. Predation Predator-prey relationship – the regulation of a population by predation

Density-Dependent Factors 2. Predation

Density-Dependent Factors 3. Parasitism and Disease Parasites – Organisms that live on or in another organism and harm them.

Density-Independent Factors Factors that affect all populations regardless of size. 1. Weather 2. Natural disaster 3. Seasons 4. Human activities