1. Limits to Growth Vocabulary Limiting factor
There are many different factors that can limit the population growth.
A factor that causes population growth to decrease is called limiting factor.

2. Types of Limiting factors
Vocabulary Density-dependent limiting factors
Density-Dependent limiting factors.
They depend on population size.
They become limiting only when the population density reaches a certain level.
They include competition, predation, parasitism, and disease.

3. Density-Dependent Limiting Factors
Vocabulary
Predator-prey relationship
Density-Dependent Limiting Factors
Competition: When a population becomes crowded, organisms compete, or struggle, with one another for food, water, space. Competition can also occur between members of different species. Two species cannot occupy the same niche at the same place and time.
Predation: Populations in nature are often controlled by predation. Predator-prey relationship
Parasitism and disease: Parasites and disease are easier to transmit in a large, and dense population

4. Predator-Prey Relationship
Figure 5-7 Wolf and Moose Populations on Isle Royale
Predator-Prey Relationship
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5. Vocabulary Density-Independent limiting factors
They affect all populations in similar ways regardless on the population size.
They include unusual weather, natural disasters, seasonal cycles, and certain human activities (damming rivers, and clear-cutting forests).

6. Populations Density-Dependent factors Density-Independent factors
Predation
Competition
Unusual weather
Natural disasters
Some human activities
Parasitism and
disease