AP Environmental Science / Unit 1: The Living World: Ecosystems
1.8 Primary Productivity
Notes
- Gross primary productivity (GPP): total energy captured by producers.
- Net primary productivity (NPP) $=GPP-$ respiration: energy available to consumers.
- Most productive: tropical rainforests, estuaries, swamps.
Practice
GPP = 1,000 kcal; respiration = 400 kcal. NPP:
$1000-400$.
NPP represents:
After producers' own use.
Which ecosystem has high productivity?
Lots of nutrients and light.
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