1 / 9

KEY CONCEPT Populations grow in predictable patterns.

Explore how organisms respond to external factors, analyze population growth patterns, and recognize the impact of resource availability on species survival. Study relationships, limiting factors, and population crashes in ecosystems.

antoniowatkins
Download Presentation

KEY CONCEPT Populations grow in predictable patterns.

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. The student is expected to:11B investigate and analyze how organisms, populations, and communities respond to external factors; 12A interpret relationships, including predation, parasitism, commensalism, mutualism, and competition among organisms;12D recognize that long-term survival of species is dependent on changing resource bases that are limited

  2. KEY CONCEPT Populations grow in predictable patterns.

  3. Changes in a population’s size are determined by immigration, births, emigration, and deaths. • The size of a population is always changing. • Four factors affect the size of a population. • immigration • births • emigration • deaths

  4. Population growth is based on available resources. • Exponential growth is a rapid population increase due to an abundance of resources.

  5. Logistic growth is due to a population facing limited resources.

  6. A population crash is a dramatic decline in the size of a population over a short period of time. • Carrying capacity is the maximum number of individuals in a population that the environment can support.

  7. Ecological factors limit population growth. • A limiting factor is something that keeps the size of a population down. • Density-dependent limiting factors are affected by the number of individuals in a given area.

  8. predation • competition • Density-dependent limiting factors are affected by the number of individuals in a given area. • parasitism and disease

  9. unusual weather • natural disasters • human activities • Density-independent limiting factors limit a population’s growth regardless of the density.

More Related