Survival. Objectives: Identify and describe food, water, and shelter as three essential components of habitat. Describe the importance of good habitat.

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Presentation transcript:

Survival

Objectives: Identify and describe food, water, and shelter as three essential components of habitat. Describe the importance of good habitat for animals. Define “limiting factors.” Recognize that some fluctuations in wildlife populations are natural as ecological systems undergo constant change.

Survival What are things you need to survive?

Survival Factors for survival of an organism Food Water Shelter Space Reproduce Disease Predator/Prey relationships Weather conditions Accidents Pollution Habitat destruction

Survival Limiting factors: are factors that prevent wildlife populations from reproducing in numbers greater than their habitat can support. They limit the growth of a population

Survival Carrying capacity: is the maximum number of individuals that an ecosystem can support.

Survival Oh’ Deer Activity Count off in fours, all ones are deer Two lines 20 yards apart Three components: Food, water, shelter Symbols for each Keep count!!!

Survival Oh’ Deer Questions 1. What do animals need to survive? 2. What are some of the “limiting factors” that affect their survival? 3. Are wildlife populations static, or do they tend to fluctuate, as part of an overall “balance of nature”? Explain. 4. Is nature every really in “balance” or are ecological systems involved in a process of constant change? Explain

Survival Oh’ Deer with a predator Go over graphs Discuss the Hudson By trappers in American history. Who were they?

Survival Hudson Bay Trappers: There are hundreds of years showing records of lynx and hare pelts. Records would show the number of pelts that were sent to Europe from America. Interestingly enough it showed the hare population would peak every seven to nine years and then crash. It also showed the lynx population would do the same but one year after the hare population.

Survival

Questions: Which animals is the predator? Which is the prey? Are predators controlling the prey, or are the prey controlling the predators? Is this like the deer habitat activity we just played? Who controls? What do you think controls the hare population?

Survival