Geography A-Level
Ecological efficiency
What Ecological efficiency means in Geography A-Level, as defined for AQA.
Definition of Ecological efficiency
Check what you remember
Read the wording for your board, then hide it and explain Ecological efficiency in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
Energy is lost at each trophic level through respiration and heat following the 10% rule, so food chains rarely exceed four or five levels.
Topics that use Ecological efficiency
- Ecosystems and processes (AQA A-Level)
Related terms
- Climatic climax
- Ecological succession
- Ecosystem productivity
- Energy dynamics
- Nutrient cycling
- Plagioclimax
- Sub-climax
- System structure
Using Ecological efficiency in the exam
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