1 Energy Flow Through an Ecosystem Food Chains, Food Webs, Energy Pyramids

2 Producers use most of the energy they make for themselves.

3 The energy that is not used by producers can be passed on to organisms that cannot make their own energy.

4 producers to 1 st level consumer Producer herbivore

5 Most of the energy is used by the consumer

6 About 10% is stored and can be passed on to next level

7 1 st level consumer to 2 nd level consumer: Carnivore

8 Most of the energy used by the secondary consumer.

9 Some of the energy is stored and can be passed on to next level.

10 A consumer that eats a consumer that already ate a consumer: 3rd level consumer

11 Consumers that eat producers & other consumers: Omnivores Omnivores eat plants and animals

12 These feeding levels are called Trophic Levels From autotroph to heterotroph heterotroph

13 Food Chain The transfer of energy along the trophic levels –

14 Food Chain What food chain do you see here?

15 Food Chains Show Available Energy

16 Another way of showing the transfer of energy in an ecosystem is the ENERGY PYRAMID

17 Energy Pyramids Show Amount of available energy decreases with each level Number of higher level organisms decreases with each level

18

19 Food Webs: interconnected food chains show the feeding relationships

20 How Many Chains are in this web?

21 1. Identify the : a)Producers b)1 st level consumers c)2 nd level (or higher) consumers d)Name the carnivores e)Name the herbivores f)Name the omnivore g)Find at least two food chains in this food web 2. Draw an energy pyramid for one of your food chains Food Chain Worksheet

22 Nutrient Cycles

23 Energy FLOWS but Matter RECYCLES

24 Energy Flows: “Useable” energy is lost at each trophic level (replaced by sun) Matter Cycles: NOT used up, just recycled over and over again: Biogeochemical Cycles

25 Water Cycle EvaporationCondensationPrecipitation

26 Carbon Cycle Photosynthesis Consumption Respiration Decomposition

27 Nitrogen- fixation Nitrification Assimilation Ammonification denitrification

28 Phosphorus Cycle Enters thru weathering