Community Ecology                         Siberian Tiger• Types of species in  communities  • Native species  • Non-native...
Native vs.                        Non-Native         Zebra Mussel     Species                                             ...
A Few Examplesof Non-Natives...                        Sheep                Kudzu    Wheat
Indicator Species•   Serve as an early    warning system•   Presence or    absence indicate the    quality of an    enviro...
Keystone Species                            Grey Wolf• Have large  impact on  community• Greater than  size or            ...
Species Interaction:Interspecific vs.Intraspecific• Resource Partitioning          Blackburnian • Robert MacArthur          ...
Succession: Howcommunities changeover time                     • Primary vs.                       Secondary              ...
Succession:    The theoretical plan...•    Facilitation: pioneer species     prepare the area for others•    Inhibition: c...
Succession: Thingsdon’t always go asplanned...•   Intermediate    Disturbance    Hypothesis    •   Impact of fire,        p...
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Community Ecology

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  • Community Ecology

    1. 1. Community Ecology Siberian Tiger• Types of species in communities • Native species • Non-native species (‘invasives’) • Indicator species • Keystone species
    2. 2. Native vs. Non-Native Zebra Mussel Species Kemp’s Ridley Turtle• Native species: organisms that normally live in a community• Non-Native species • Introduced or migrate into a community • Few natural predators, diseases, parasites • Often out-compete & replace native species • Most of our crops and livestock non-native
    3. 3. A Few Examplesof Non-Natives... Sheep Kudzu Wheat
    4. 4. Indicator Species• Serve as an early warning system• Presence or absence indicate the quality of an environment• Examples: fish: trout or amphibian: frog Rainbow Trout
    5. 5. Keystone Species Grey Wolf• Have large impact on community• Greater than size or Bull Shark abundance would indicate
    6. 6. Species Interaction:Interspecific vs.Intraspecific• Resource Partitioning Blackburnian • Robert MacArthur Warbler • Species competing for the same resources evolve traits that allow them to share • Warblers in Maine
    7. 7. Succession: Howcommunities changeover time • Primary vs. Secondary Succession
    8. 8. Succession: The theoretical plan...• Facilitation: pioneer species prepare the area for others• Inhibition: colonizers inhibit growth of some pioneers: shade and toxic substances• Tolerance: late succession species have high tolerance for shade, fire, etc. Mt. St. Helen’s
    9. 9. Succession: Thingsdon’t always go asplanned...• Intermediate Disturbance Hypothesis • Impact of fire, pests/disease, natural disasters (hurricane, tornado, flood) • >Biodiversity
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