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AP Environmental Science / Unit 3: Populations

3.3 Survivorship Curves

3 practice questions

Notes

  • Type I: high survival until old age (humans, elephants).
  • Type II: constant death rate (birds, squirrels).
  • Type III: high death rate early (fish, insects, plants).
Age (percent of max life span)Survivors (log scale)Type IType IIType III
The three survivorship curve types.

Practice

Sea turtles lay hundreds of eggs, and most hatchlings die. Type:
Type I is typical of:
A straight-line (constant) survivorship curve is:

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