1 / 9

SECTION 8.1 NOTES

SECTION 8.1 NOTES. UNDERSTANDING POPULATIONS. What is a Population? . Members of the same species (reproduce with one another) Live in the same place (Geographic location) Live at the same time (Past, Present, or Future). How Fast Can a Population Grow?.

armine
Download Presentation

SECTION 8.1 NOTES

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. SECTION 8.1 NOTES UNDERSTANDING POPULATIONS

  2. What is a Population? • Members of the same species (reproduce with one another) • Live in the same place (Geographic location) • Live at the same time (Past, Present, or Future)

  3. How Fast Can a Population Grow? • Death Rate + Birth Rate = Growth Rate • Populations usually stay about the same. • Reproductive Potential • Fastest rate an organism can grow • Increase when organisms reproduce more often • Small organisms (bacteria) usually reproduce quicker than larger organisms (humans)

  4. Exponential Growth • Organisms Grow faster and faster over time! • Conditions • Plenty of Food, Space, and no competition or predators

  5. What Limits Population Growth? • Environment Changes • Resources are Used Up • Death Increases • Births Decrease • Carrying Capacity • Maximum population that the ecosystem for a particular species can support.

  6. Resource Limits • Limiting Resources such as sunlight, nutrients, water. • Carrying capacity is reached when the resource is consumed at the rate that it is made!

  7. Competition within a population • Organisms compete for resources such as: • Territory – Living Space • Mates • Food • Homes/Shelter

  8. Two Types Population Regulation • Density Dependent – cause of death is related to issues of overcrowding/space. • Density Independent – Not related to number of organisms but other factors such as weather, natural disasters, etc.

More Related