AP Environmental Science 9.8 - Endangered Species

Meaning

Endangered Species: species of all types that are at high risk for extinction due to low rate of evolution, natural selection, or adaptation

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Risk Factors

• K-selected Species
  • Not adapted to unstable environmental changes
  • Lower population growth rate
  • Fewer larger offspring
  • Later reproductive stage
• Too Specialized
  • Specific habitat, climate zone, biome (latitude)
  • Specific food source
• Endemic
  • Diseases that are particularly found in a defined region within a specific plant or animal species

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Why are Species Becoming Endangered?

HIPPCO

• Habitat Destruction
• Invasive Species
• Population Size (increasing human population)
• Pollution
• Climate Change
• Overexploitation (hunting, fishing)

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Importance of Endangered Species

• Add to biodiversity
• Key species in their respective food webs
• May be an indicator species
• Community keystone or foundational species

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How to Save Endangered Species

• Habitat protection - preservations
• Legislation and enforcement
• Sanctioned breeding programs (captive breeding)
• Education and knowledge

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