Predator / Prey Relationships.

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Presentation transcript:

Predator / Prey Relationships

The population of all organisms is constant. Healthy Ecosystem The population of all organisms is constant.

Grass is Diseased Grass population decreases rabbit population begins to decrease. Next, the snake population decreases Lastly the hawk population decreases After the initial drop off, the populations begins to stabilize.

Rabbits are Diseased Rabbit population decreases grass population increases The snake and hawk population decrease After 8 months, the populations stabilize (the grass stays higher than the rest)

Snakes are Diseased Snake population decreases rabbit population increases The hawk population decreases The grass population decreases slower than the other two.

Hawks are Diseased Hawk population decreases snake population increases. Increase in snakes rabbit population decreases rabbit population decreases grass population increases All populations stabilize. The hawk and rabbit population stay lower than the snake and grass population

Predator/Prey Storyboard You will DO: Identify the domino effect that will occur in an ecosystem if one trophic level changes Create a five panel storyboard that includes pictures and descriptions to tell the story of a predator/prey relationship

DUE DATE You will have class time today and time tomorrow to work on your storyboard The final storyboard is due this FRIDAY February 24th.

Predator & Prey Storyboard Lindsay Spears Core 1 Predator & Prey Storyboard Ecosystem: North American Forest Producer: Grass Primary Consumer: Rabbit Secondary Consumer: Snake: Apex Predator: Hawk Grass is wiped out due to a forest fire. With less grass available, many rabbits starve. The rabbit population decreases. With a smaller amount of prey, the snake population decreases. The hawk population will also decrease due to lack of food.