1 / 16

Understanding Population Dynamics: Types, Growth Rates, and Influencing Factors

A population is a group of organisms of the same species living in a specific area at a given time. This overview explores key concepts including population density, dispersion, and survivorship curves. We differentiate between Type III (r-selected) organisms that thrive in unstable environments, and Type I or II (K-selected) ones found in stable conditions. Additionally, it covers immigration, emigration, and how to calculate growth rates, emphasizing factors that affect population changes in developed versus developing countries.

aulii
Download Presentation

Understanding Population Dynamics: Types, Growth Rates, and Influencing Factors

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. Populations

  2. What is a population? • Group of organisms that belong to the same species and live in a particular place at a particular time

  3. Population Density

  4. Dispersion

  5. Survivorship Curve

  6. Type III Survivorship = R selected • Because they live in an unstable environment with many densitry independent limiting factors they… • Remain small • Use little energy to make each individual • Produce many offspring • Mature early • Die early • Individuals reproduce only once

  7. Type I or II survivorship = K selected • Because they live in a stable environment with many density dependent limiting factors they… • Are large • Use a lot of energy to make each individual • Produce few offspring • Mature slowly • Have long life expectancy • Reproduce more than once

  8. Immigration vs. Emigration

  9. Calculate the growth rate if… • There is a population of 1500 people • 50 people die in one year • 75 people are born in the same year

  10. Growth rate = birth rate – death rate • Birth rate = # of births/total population • Death rate = # of deaths/total population • When will population size increase? Decrease?

  11. Exponential Model In order for this to occur, the population requires _____________ resources.

  12. Logistic Model What is K?

  13. Density Independent Factors What are some examples?

  14. Density Dependent Factors What are some examples?

  15. Human Population

  16. Developed vs. Developing Countries

More Related