ecological theory of population distributions
Download
Skip this Video
Download Presentation
Ecological Theory of Population Distributions

Loading in 2 Seconds...

play fullscreen
1 / 21

Ecological Theory of Population Distributions - PowerPoint PPT Presentation


  • 110 Views
  • Uploaded on

Ecological Theory of Population Distributions. The Concept of “Niche”. Elton’s (1927) Emphasized animal’s place in the biotic community What does the animal do for a living? Hutchinson’s (1957) N-dimensional hypervolume What environmental conditions does the critter occupy?.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Ecological Theory of Population Distributions' - cale


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.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
the concept of niche
The Concept of “Niche”
  • Elton’s (1927)
    • Emphasized animal’s place in the biotic community
    • What does the animal do for a living?
  • Hutchinson’s (1957)
    • N-dimensional hypervolume
    • What environmental conditions does the critter occupy?
but relationships are dynamic
But… Relationships Are Dynamic
  • The environment is dynamic (i.e., changing)
  • Site fidelity may prevent immediate response
  • Animal’s may acclimate producing different responses
factors limiting distributions
Factors Limiting Distributions
  • Mobility/dispersal
  • Habitat
  • Temperature, moisture, light, oxygen, vegetation, aquatic/lithic substrates
  • 3. Interactions with other animals
limiting factors habitat
Limiting Factors - Habitat
  • Temperature, Moisture, Light, Oxygen
  • Vegetation, Aquatic or Lithic Substrates
limiting factors other organisms
Limiting Factors – Other Organisms
  • Intraspecific Interactions
    • Fretwell’s Ideal Free Distribution
    • The Ideal Despotic Distribution
limiting factors other organisms1
Limiting Factors – Other Organisms
  • Interspecific Interactions
    • Competition
      • Gause’s Competitive Exclusion
        • MacArthur (1958) northeastern warblers
      • Character displacement
limiting factor or factor s
Limiting Factor? or Factors?
  • Leibig’s Law
    • Stressed importance of single factors limiting distributions
  • Does not work for interacting factors
ad