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How does Succession Effect the Animals?

How does Succession Effect the Animals?. Pioneer plant species favor herbivores, small and large As the forest grows, more predators move in As succession continues the diversity changes. Natural Selection. If an ecosystem changes, the animal populations have to adapt or move

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How does Succession Effect the Animals?

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  1. How does Succession Effect the Animals? • Pioneer plant species favor herbivores, small and large • As the forest grows, more predators move in • As succession continues the diversity changes

  2. Natural Selection • If an ecosystem changes, the animal populations have to adapt or move • Only the animals with the characteristics to survive will populate the new ecosystem • Animals can gain new characteristics by chance genetic mutations

  3. Examples of Natural Selection • Darwin’s finches • Galapagos Islands • Similar finches on each island • The finches have a unique beak shape • Specialized for food source on it’s island • Mountain Sheep • Coat color and texture • DallSheep of Alaska • Bighorn Sheep of Rocky Mountains • Desert Sheep of Mexico

  4. Adaptation • A trait shaped by natural selection • Coat color or thickness • Beak shape and length • The better suited the greater its chances of survival and reproductive success

  5. Camouflage • Morphological adaptations that allow animals to blend with their environment • Prey species • Juvenile animals • Female animals

  6. Mimicry • Morphological adaptations that make one species look like another species • Harmless species looking like a harmful species • Viceroy and Monarch butterfly • Kingsnake and coral snake

  7. Natural Selection and Resistance • The ability of an organism to tolerate a particular chemical designed to kill it • Herbicides • Roundup Resistant weeds • Pesticides • Colorado Potato Beetle • Antibiotics • Methicillin-resistant Staphylococcus aureus(MRSA)

  8. Artificial Selection The selective breeding of organisms by humans for specific characteristics

  9. Three Types of Natural Selection Stabilizing Directional Disruptive • Remember • These are examples of different populations of the same species

  10. Stabilizing Selection • Selection againstboth extremes

  11. Directional Selection • Selection against one extreme

  12. Disruptive Selection • Selection against the mean • Splits population into two groups

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