1 / 6

Limits to Population Growth

Limits to Population Growth. What slows the growth of populations?. Limiting Factors Density-dependent limiting factors : limiting factors that are dependent on population size

vega
Télécharger la présentation

Limits to Population Growth

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Limits to Population Growth

  2. What slows the growth of populations? • Limiting Factors • Density-dependent limiting factors: limiting factors that are dependent on population size • Density-independent limiting factors: limiting factors that affect the same percentage of a population regardless of its size.

  3. Density-dependent limiting factors • Food supply • Predation • Disease • Related to competition and interactions between organisms. • Greater effect in larger populations.

  4. Density-dependent limiting factors • Populations controlled by density-dependent factors show an S-shaped curve on a graph. • Exponential growth at first, then growth slows and stops at the carrying capacity. p.81

  5. Density-independent factors • Natural disasters • Hurricane • Fire • Tsunami • Limit growth of population by destroying habitat.

  6. Density-independent limiting factors • Populations controlled by density-dependent factors show a boom and bust on a graph • Exponential growth when conditions are favorable, then many die when conditions change. • Thrips, aphids, and other Insects (pg 127)

More Related