Energy Flow Through an Ecosystem Food Chains, Food Webs, Energy Pyramids copyright cmassengale1.

Presentation on theme: "Energy Flow Through an Ecosystem Food Chains, Food Webs, Energy Pyramids copyright cmassengale1."— Presentation transcript:

1 Energy Flow Through an Ecosystem Food Chains, Food Webs, Energy Pyramids copyright cmassengale1

2 Question: How does energy enter an ecosystem? copyright cmassengale2

3 3 Begins with the SUNBegins with the SUN-Photosynthesis Begins with chemicalsBegins with chemicals-chemosynthesis

4 Photosynthesis Photosynthesis Chemical reaction where green plants use water & carbon dioxide to store the sun’s energy in glucose () Chemical reaction where green plants use water & carbon dioxide to store the sun’s energy in glucose ( C 6 H 12 O 6 ) copyright cmassengale4 6CO 2 + 6H 2 O + sunlight  C 6 H 12 O 6 + 6O 2

5 copyright cmassengale5

6 Organisms that can make glucose during chemosynthesis or photosynthesis are called PRODUCERS. copyright cmassengale6

7 Producers use most of the energy they make for themselves. copyright cmassengale7 - growing -moving -reproducing -waste heat

8 Producers use cellular respiration to supply the energy they need to live. copyright cmassengale8

9 CELLULAR RESPIRATION is the chemical reaction that releases the energy in glucose. copyright cmassengale9 6O 2 + C 6 H 12 O 6 --> 6H 2 O + 6CO 2 + energy

10 The energy that is not used by producers can be passed on to organisms that cannot make their own energy. copyright cmassengale10

11 Organisms that cannot make their own energy are called CONSUMERS. copyright cmassengale11

12 Consumers that eat producers to get energy: Are first order (1 st ) or primary consumers Are herbivores (plant-eaters) copyright cmassengale12

13 Most of the energy the primary consumer gets from the producer is used by the consumer. copyright cmassengale13 - growing -moving -reproducing -waste heat

14 Some of the energy moves into the atmosphere as heat. copyright cmassengale14

15 Some energy in the primary consumer is STORED & not lost to the atmosphere or used by the consumer itself. This energy is available for another consumer (predator). copyright cmassengale15

16 A Consumer that Eats Another Consumer for Energy: Is called a secondary or 2nd order consumer Is called a secondary or 2nd order consumer May be a carnivore or a omnivore May be a carnivore or a omnivore May be a predator May be a predator May be a scavenger May be a scavenger copyright cmassengale16

17 Most of the energy the secondary consumer gets from the primary consumer is used by the secondary consumer. copyright cmassengale17

18 Some of the energy is lost as heat, but some energy is stored and can passed on to another consumer. copyright cmassengale18

19 A consumer that eats a consumer that already ate a consumer: Is called a 3rd order or tertiary consumer Is called a 3rd order or tertiary consumer May be a carnivore or a omnivore May be a carnivore or a omnivore May be a predator May be a predator May be a scavenger May be a scavenger copyright cmassengale19

20 Consumers that eat producers & other consumers Are called omnivores Are called omnivores Omnivores eat plants and animals Omnivores eat plants and animals copyright cmassengale20

21 Consumers that eat other dead consumers are called Detritivores copyright cmassengale21

22 The transfer of energy from the sun to producer to primary consumer then to higher order consumers can be shown in a FOOD CHAIN. copyright cmassengale22

23 copyright cmassengale23

24 Food Chains Show Available Energy copyright cmassengale24

25 Another way of showing the transfer of energy in an ecosystem is the ENERGY PYRAMID copyright cmassengale25

26 Energy Pyramids Show Amount of available energy decreases for higher consumers Amount of available energy decreases for higher consumers Amount of available energy decreases down the food chain Amount of available energy decreases down the food chain It takes a large number of producers to support a small number of primary consumers It takes a large number of producers to support a small number of primary consumers It takes a large number of primary consumers to support a small number of secondary consumers It takes a large number of primary consumers to support a small number of secondary consumers copyright cmassengale26

27 copyright cmassengale27

28 Food Webs: Are interconnected food chains Are interconnected food chains They show the feeding relationships in an ecosystem They show the feeding relationships in an ecosystem copyright cmassengale28

29 copyright cmassengale29 How Many Chains are in this web?

30 Identify the Producers, Consumers, & Decomposers: copyright cmassengale30 Count the Food Chains!