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Community interactions

Limit of Tolerance . Limit of Tolerance . OPTIMAL RANGE . Range of Tolerance . Community interactions. # of Survivors . 86 94 98 101 106 . Temperature F . Ecology Hierarchy . Interactions with biotic factors

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Community interactions

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  1. Limit of Tolerance Limit of Tolerance OPTIMAL RANGE Range of Tolerance Community interactions # of Survivors 869498 101 106 Temperature F

  2. Ecology Hierarchy • Interactions with biotic factors • Individual: physiology, reproduction, development or behavior • Populations/species: habitat and resource needs, group behavior, population growth, extinction • Communities: how populations interact • Interactions with abiotic and biotic factors • Ecosystems • Biomes • Biosphere

  3. Species Interactions: competition Intraspecific competition – • Short term- • Density dependent population control • Encourages territoriality (K selected) • Send young away • Resource partition between generations • Force trespassers away • Long term • Encourages specialization

  4. Species Interactions: competition • Interspecific competition – Competitive exclusion principle • Non-native invasive species • What leads to heterogeneity? Small changes in the ecosystem Topography, slope aspect, pH, moisture Resource partitioning

  5. Species Interactions: competition Fundamental Niche Realized Niche

  6. Species Interactions: competition • Interspecific competition • Non-native invasive species • Keys to success • Generalist species • • Excellent dispersal mechanisms, allowing it to spread • • R-selected or r-strategist • Large clutch size/many offspring produced • Early onset of reproduction/early maturation • o Frequent reproduction • Superior defenses against predators in new environment • • Superior skills as a predator in new environment

  7. Snakehead fish Norway rat Cane toad Kudzu

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