🙏 Free review 2020
Required Environmental Legislation
Major Environmental Disasters
✍️ Free Response Questions (FRQs)
🏜 Unit 1: The Living World: Ecosystems
1.1Introduction to Ecosystems
1.10Energy Flow and the 10% Rule
🐠 Unit 2: The Living World: Biodiversity
2.5Natural Disruptions to Ecosystems
👪 Unit 3: Populations
3.0Unit 3 Overview: Populations
3.1Generalist and Specialist Species
3.2K-Selected r-Selected Species
🌏 Unit 4: Earth Systems and Resources
4.3Soil Composition and Properties
🏖 Unit 5: Land and Water Use
5.7Meat Control Methods
5.9Impacts of Mining
⚡️ Unit 6: Energy Resources and Consumption
6.0Unit 6 Overview: Energy Resources and Consumption
💨 Unit 7: Atmospheric Pollution
7.1Introduction to Air Pollution
7.5Indoor Air Pollutants
7.6Reduction of Air Pollutants
♻️ Unit 8: Aquatic and Terrestrial Pollution
🔥 Unit 9: Global Change
9.1Stratospheric Ozone Depletion
9.4Increases in the Greenhouse Gases
⏱️ 1 min read
May 1, 2020
Think about the story of Goldilocks and the Three Bears. That is what ecological tolerance is about; finding something that is ‘just right’. Populations exist in their current habitats because the conditions there are optimal.
All populations need certain factors in order to survive. Food, water, shelter are the most common but what if there was too much sunlight? Or too little soil? Would certain species be able to live there?
If there is slightly too much or too little of an environmental factor, the population size will decrease because individuals are stressed. They have enough time and energy to look after themselves and none for reproduction or care. Go beyond this level and you face intolerance. Individuals are dying or leaving due to terrible conditions.
🎥 Watch: AP Environmental Science Streams
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