Energy flows through ecosystem in one direction from sun or organic compounds to producers...

Energy flows through ecosystem in one direction from sun or organic compounds to producers (autotrophs) then to consumers (heterotrophs)

Producers? Consumers?

What do arrows show?

Food Chains: series of steps in which organisms transfer energy by eating and being eaten

ProducerConsumer1Consumer2Consumer3

Producer? Consumer1,2,3?

Food Webs: Various feeding relationships in an ecosystems (multiple food chains)

Producers, consumer1’s, consumer2’s,etc.?

Trophic Level: Each step in a food chain or food web

“trophe” greek- food or nourishment

Laws of Thermodynamics:1st Law of energy: energy cannot be created or

destroyed2nd Law of energy: no energy transfer is 100%

Ecological Pyramid- diagram shows relative amounts of energy or matter contained within each trophic level in a food chain or food web

Don’t copy: reminder

Trophic Level: Each step in a

food chain or food web“trophe” greek- food or nourishment

Which trophic level shows the

Most amount of food?

3 types of pyramids:1. Energy Pyramid- shows

relative amount of energy available at each trophic level

Don’t copy

*only 10% of energy available within one trophic level is transferred to organisms at next trophic level

*the more levels that exist between a producer and a top-level consumer, the less energy that remains from original amount

If 1st trophic level has 500% energy, 2nd has?

2. Biomass Pyramid: represents the amount of potential food available for each trophic level in an ecosystem

*Expressed in grams or organic matter per unit area

Biomass- amount of living tissue within trophic level

3. Pyramid of Numbers: Shows the relative number of individual organisms at each trophic level

How many rabbits on 2nd trophic level?