AP Environmental Science Unit 2 - Biodiversity

2 min readoctober 14, 2021

AP Environmental Science ♻️

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AP Environmental Science Biodiversity Review

Here's an organized outline for AP Environmental Science Unit 2 reviews. This outline has been adapted from the 2019 Course Description published by College Board. You can use this to build an AP Enviro Unit 2 study guide.
The diversity of species and their habitats are vital to the survival of complex ecosystems.

Organism Survival

Ecosystems can be significantly altered by natural and manmade disruptions.
⚡ Read: AP Environmental Science - Natural Disruptions to Ecosystems 
The survival of organisms depends on their ability to adapt to disruptions to their environment. 
  • Environmental changes place new pressures on organisms and they must be able to adapt by altering their behaviors or moving. These environmental changes can be sudden or gradual and threaten a species survival. 
  • A keystone species is an organism that other species depend on and without it, the structure of the ecosystem would change. 
  • An indicator species is a plant or animal, that can be used to infer conditions about the ecosystem by its presence or absence.
⚡ Watch: AP Environmental Science - 🎥 Adaptations

Unit 2 Vocab

  • Behavioral adaptations
  • Biodiversity
  • Ecological tolerance
  • Ecosystem services
  • Generalist species
  • Genetic adaptations
  • Genetic diversity
  • Habitat diversity
  • Indicator species
  • Island biogeography
  • Keystone species
  • Natural climate changes
  • Pioneer species
  • Primary succession
  • Secondary succession
  • Specialist species
  • Species diversity
  • Species richness


Browse Study Guides By Unit
🏜Unit 1 – The Living World: Ecosystems
🐠Unit 2 – The Living World: Biodiversity
👪Unit 3 – Populations
🌏Unit 4 – Earth Systems & Resources
🏖Unit 5 – Land & Water Use
⚡️Unit 6 – Energy Resources & Consumption
💨Unit 7 – Atmospheric Pollution
♻️Unit 8 – Aquatic & Terrestrial Pollution
🔥Unit 9 – Global Change
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