2. (1) Ecosystem Environment and all living things it supports A system of matter and energy cycling. Components: –Sun  Original Energy Source –Biotic Factors--Living Parts –Abiotic Factors--Nonliving Parts

4. (2) Abiotic Factors Nonliving (Never Living) parts of Ecosystem Physical: –Temperature –Sunlight –Quantity of nutrients Chemical: –Types of nutrients –pH of water –Salinity of water

5. (3) Biotic Factors Living (Once Capable of Living) parts of Ecosystem All organisms = Biotic Factors –Rely on BOTH biotic and abiotic factors!

6. (4) Autotrophs & Heterotrophs AutotrophHeterotroph Also called Producer Convert Un-usable Light or Chemical Energy  Usable Chemical Potential Energy Example: Plants & Bacteria Also called Consumer Rely on Autotrophs & Other Heterotrophs Example: Animals

8. (5) Types of Heterotrophs Herbivore: A heterotroph which consumes mostly photosynthetic organisms. Carnivore: A heterotroph which consumes mostly other heterotrophs (animals). Omnivore: A heterotroph which consumes both photosynthetic organisms AND heterotrophs (animals) Decomposer / Detrivore: A heterotroph which consumes “dead” remains, releasing the compounds back into ecosystem.

9. (6) Food Chains & Food Webs Food ChainFood Web Diagram that shows energy + matter transfer. Includes just a few organisms and feeding relationships. Diagram that shows energy + matter transfer. Includes ALL organisms and feeding relationships. Contains multiple food chains.

12. (7) The Arrows Arrows show movement / flow of energy and matter. Point in direction of transfer: –Food to Eater –Producer / Consumer  Consumer –Cheeseburger  Marquis

13. Energy is moving from Sun to Autotrophs/Producers (the plants) Energy is moving from Autotrophs/Producers to a Consumer Energy is moving from one consumer to another consumer…

14. (8) Food / Energy Pyramid Shows amount of energy transferred and lost as “food” moves throughout an ecosystem. Moves bottom  up –Bottom = Producers = Most Energy –Energy lost as heat –Top = Consumers = Least Energy Trophic Levels: –Refers to the “Energy Level” an organism is at. –1 st = Producer, 2 nd = Next Consumer, 3 rd …4 th …

15. Why is there less kcal of energy?! What happens to it?? Where do we have the most usable energy? Where do we have the least usable energy?

18. 1 st Trophic Level 2 nd Trophic Level 3 rd Trophic Level 4 th Trophic Level You get the picture… We learned about these levels last week… We can also use this to show trophic levels…