1 / 9

Population Ecology

Population Ecology. Population – all the individuals of the same species in a specific area. 4 characteristics of populations: Geographic distribution Density Growth rate Age. 1. Geographic distribution – where the population is located, its range.

masako
Download Presentation

Population Ecology

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. Population Ecology

  2. Population – all the individuals of the same species in a specific area. 4 characteristics of populations: • Geographic distribution • Density • Growth rate • Age

  3. 1. Geographic distribution – where the population is located, its range 2. Population Density - number of organisms per square unit volume Which state is the most densely populated?

  4. Population density can be random, uniform, or clumped.

  5. A. Random - some areas with many individuals, some with few.ex: seeds dispersed by windB.Uniform (Even) - all areas with the same number and the same distance between organisms. ex: trees in an orchard

  6. C. Clumped – groups of many individuals, with large spaces between the groupsClumped distribution could result from individuals using a common resource ex:buffalo around water holes

  7. 1. What else might cause organisms to be clumped? 2. What else might cause organisms to be evenly distributed? 3. Which of these 3 types of distributions would be least likely to occur for a population of organisms in nature? 4. When might a population be both uniform and clumped?

  8. Population Sampling: 2. Mark and recapture – animals are caught, tagged and released. They are periodically recaptured, and a formula is used to estimate the population: Number caught x number tagged number caught with tag 1. Random sampling – estimating a population by sampling a small area and scaling up. ex: if there are 5 in one square foot, there would be 50 in 10 square feet.

More Related