Energy Flow in Ecosystems (What Eats What (Organisms can be classified by…
Energy Flow in Ecosystems
Life Depends on the Sun
Photosythesis: plants use sunlight to make sugar molecules
End result: carbohydrates & oxygen
Water, co2, sunlight.
Producers to Consumers
Producers (plants, autotrophs): make their own food/organic molecules
Exceptions: deep-ocean communities; no photosynthesis. Bacteria are producers.
Consumer (herbivore, carnivore, omnivore): eats other organisms for food
What Eats What
Organisms can be classified by what they eat.
Herbivores (Primary Consumers)<-Producers (Primary Producers)
Carnivores (Secondary/Tertiary Consumers)<-Other Consumers
Omnivores (Secondary/Tertiary Consumers)<-Consumers & Producers
Decomposers<-Everything (after it's dead)
Burning the Fuel
Occurs inside the cell's mitochondria
Absorb oxygen; uses oxygen and glucose to produce co2, water, and energy
Process of breaking down food to yield energy & carbohydrates
Occurs whenever an organism eats another organism
Food Chains, Food Webs, Food Pyramids
Trophic level: one of the steps in a food chain or web.
Some energy lost as heat, making less energy available in each trophic level.
10% of the energy in one trophic level reaches the next level. This affects the # of organisms in a tropic level, and the # of trophic levels
This results in there being more plants and less top carnivores.