1. Mrs. Kooiman La Serna High School

2. Everything organisms do in ecosystems (running, breathing, burrowing, growing) Requires ENERGY!!!!

3.  The rate at which organic material is produced by photosynthetic organisms in an ecosystem.  Examples of photosynthetic organisms…..

4.  Producers: Organisms that first capture energy (photosynthetic) from the sun.  Consumers: Organisms that consume plants or other organisms to obtain the energy necessary to build their molecules.  Trophic Level: A group of organisms that have the same source of energy; a step in the food chain.

5. Energy Producer Primary Secondary Consumer Consumer

6. Top Carnivores 0.1% Energy Producers 100% Energy Herbivores 10% Energy Carnivores 1% Energy

7. producers.  The lowest trophic level of an energy pyramid is composed of producers. › Examples: grass, leaves, algae, flowers, phytoplankton primary consumers or herbivores  The next trophic level in the pyramid is composed of primary consumers or herbivores. › Examples: insects, rabbits, cows, zooplankton secondary consumers carnivores  The third trophic level of an energy pyramid is composed of secondary consumers or carnivores. › Examples: mice, small fish, anything that eats meat top carnivorestop predators  The top trophic level of an energy pyramid is composed of top carnivores or top predators. › Examples: snakes, sharks, bears, people

8. Top Carnivores 0.1% Energy Producers 100% Energy Herbivores 10% Energy Carnivores 1% Energy

9.  10% of energy is PASSED ON at each trophic level.  So…90% of energy is LOST at each level  Organisms use energy and it is eventually lost as HEAT!!