1. Ecosystems and Conservation Biology Chapter 36 Part 2

2. 36.2 Energy flows through ecosystems

3. Productivity of Ecosystems Only about 1% of the sun’s energy is harnessed by photosynthesis Still enough to produce Earth’s biomass –Organic material

4. Productivity of Ecosystems Primary productivity –Rate at which producers in an ecosystem build biomass

5. Ecological Pyramids Follows transfer of energy through ecosystem

6. Energy Pyramids Emphasizes energy loss from one trophic level to the next In general, only 10% transferred each time

7. Biomass Pyramid Represents actual biomass (dry mass of all organisms) in each trophic level

8. Pyramid of Numbers Number of individual organisms in each trophic levels