Ecology Chap 4
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Ecology Chap 4

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Ecology Chap 4 Ecology Chap 4 Presentation Transcript

  • Topics-
    Climate
    Interactions
    Succession
    Biomes
    Ecology Chap 4
    Monday-Agenda
    Notes
    Lab- Parrot Island
    Castle learning**
    Review Book
    Paragraph
  • What is a niche?
    …it is the role or job of an organism in it’s environment.
    It includes what it eats, where it lives, etc…
  • What is a habitat?
    …is where the organism lives.
    EX: a pond, a tree or a hole in the ground!
  • Community Interactions
  • Commensalism: One partner living on the other with no obvious effect on the second.
    Parasitism: One partner living on the other with detrimental effect on the second.
    Mutualism (symbiosis in a strict sense): Advantages for both partners.
  • Predation Versus Parasitism
    Predators get their food from prey, but they do
    not take up residence on or in the prey.
  • Parasites get their food from hosts, and they live on or in the host for a good part of their life cycle; they may or may not kill the host.
    Common flea
    Heart worm
  • What type of symbiosis?
    Commensalism
    Parasitism
  • What type of symbiosis
    Mutualism
    Mutualism
  • What type of symbiosis?
    Mutualism
    Parasitism
    Rhyzobia on plant roots
  • Dynamics of Predator-Prey Interactions
    Many of the adaptations of predators and their victims arose through coevolution.
    The dynamics depend on:
    the carrying capacity of prey population in the absence of predation,
    the reproductive rates of the prey and predator,
    the behavioral capacity of the individual predators to respond to prey density.
  • Carrying Capacity
    number of individuals who can be supported in a given area within natural resource limits
    Limiting factors -cause population growth to decrease
    Food availability
    Human disturbances
    Predation
    Disease
  • Example of a Limiting Factor
    In mountainous regions and high latitudes, timberline is the limit of tree growth. Trees cannot grow above the high timberline because water remains frozen at the low temperature for most of the year. In this case, timberline, or more specifically, temperature is the limiting factor for tree density and distribution.
  • ExponentialGrowth -unlimited resources, continuous growth
    Logistic Growth-
    carrying capacity of 700 cells is reached
  • Primary succession
  • Secondary Succession