37 (14-21)

Energy Flow vs. Chemical Cycling

• 37.14: chemical cycles vs energy flow• 37.15: which biomes provide for best primary

productivity? (ones with most diversity)• 37.16: Each trophic level only receives 10% of

available energy!• 37.17: more energy available from plants than

meats to humans• 37.18: decomposers at every level

Chemical Cycles

Carbon

Nitrogen

Phosphorus

Water

The Carbon Cycle

The Nitrogen Cycle

The Water Cycle