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Predators and Prey

Predators and Prey. Factors That Affect Population Growth. Consider the Following Web. What relationships in the web could affect the hare (rabbit) population and how?. Lynx. Fox. Hare (Rabbit). Squirrel. Plant Roots. Shrubs/Berries. Predator – Prey Relationships.

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Predators and Prey

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  1. Predators and Prey Factors That Affect Population Growth

  2. Consider the Following Web • What relationships in the web could affect the hare (rabbit) population and how? Lynx Fox Hare (Rabbit) Squirrel Plant Roots Shrubs/Berries

  3. Predator – Prey Relationships • Predator-Prey relationships keep the populations of animals in balance in a healthy ecosystem. • The Prey (e.g. Hare) • Provides a source of food to the predator. • The Predator (e.g. Lynx) • Keeps the population of the prey in check (i.e. not too big) • When this relationship is disturbed or becomes unbalanced: • Populations become too big • Starvation occurs (endangering the predator or prey species) • Other parts of the food web are affected (the web may collapse)

  4. Hare & Lynx Population Data

  5. Predator & Prey Cycles • Populations of predators and prey are closely related • Their cycles repeat predictably over seasons or years

  6. Predator & Prey Cycles • Populations of predators and prey are closely related • Their cycles repeat predictably over seasons or years 1. Low Predator Population

  7. Predator & Prey Cycles • Populations of predators and prey are closely related • Their cycles repeat predictably over seasons or years 2. Increasing Prey Population

  8. Predator & Prey Cycles • Populations of predators and prey are closely related • Their cycles repeat predictably over seasons or years 3. Increasing Predator Population

  9. Predator & Prey Cycles • Populations of predators and prey are closely related • Their cycles repeat predictably over seasons or years 4. Decreasing Prey Population

  10. Predator & Prey Cycles • Populations of predators and prey are closely related • Their cycles repeat predictably over seasons or years 5. Decreasing Predator Population

  11. Predator & Prey Cycles • Populations of predators and prey are closely related • Their cycles repeat predictably over seasons or years 6. Cycle Repeats

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