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FOOD CHAINS, WEBS & PYRAMIDS. sun eclipse with palm the ultimate energy source.

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Presentation on theme: "FOOD CHAINS, WEBS & PYRAMIDS. sun eclipse with palm the ultimate energy source."— Presentation transcript:

1 FOOD CHAINS, WEBS & PYRAMIDS

2 sun eclipse with palm the ultimate energy source

3 If you are what you eat, what are you? producer detritivore omnivore carnivore herbivore consumer decomposer autotroph heterotroph

4 PRODUCERS l What are producers? sunlightproducer l Ex. Plants, algae and some bacteria

5 CONSUMERS l What are consumers? sunlightproducerconsumer 1consumer 2 l Examples: deer, rabbits, cows, mice, lions, humans, hawks, snakes

6 Where do all the dead things go?

7 DECOMPOSERS l What are decomposers? l Examples: bacteria, fungi, insects sunlightproducerconsumer 1consumer 2 consumer 3 decomposer

8 HERBIVORES l What are herbivores? l Ex. Cows, caterpillars, rabbits sunlightproducerconsumer 1consumer 2

9 CARNIVORES l What are carnivores? l Ex. tigers, wolves, snakes, hawks sunlightproducerconsumer 1consumer 2

10 OMNIVORES l What are omnivores? l Ex. bears and humans

11 Food Chains & Food Webs l Organisms in ecosystems transfer energy from organism to organism in feeding relationships called trophic levels.

12 Food Chain Example: Algae Krill Cod Leopard Killer Seal Whale producerprimary consumer quaternary consumer tertiary consumer secondary consumer herbivore carnivore

13 Food Chains & Food Webs l What would happen in this food chain if all the cod were to die? l What would happen to krill if all algae were to die? l Which is more stable, a food chain or a food web? Why?

14 Ecological Pyramids l Instead of representing trophic levels in a food web, an ecological pyramid can be used.

15 Algae Krill Cod Leopard Seal Killer Whale Ecological Pyramids

16 1 st Trophic Level 2 nd Trophic Level 3 rd TL 4 th TL 5 th TL Algae Krill Cod Leopard Seal Killer Whale

17 Ecological Pyramids Producer Primary Consumer Secondary Consumer Tertiary Consumer Quaternary Consumer Algae Krill Cod Leopard Seal Killer Whale

18 Pyramid of Energy l What happens to the energy as you go up? l How much energy is lost between levels? l Why? l How much energy is retained?

19 Pyramid of Biomass What does this pyramid of biomass illustrate? What is biomass?

20 Pyramid of Numbers What does this pyramid of numbers illustrate?

21 Ecological Pyramids l What happens to the biomass, numbers,and energy from trophic level to trophic level?

22 Ecological Pyramids l What is different about this pyramid?

23 Pyramids of Aquatic Ecosystems l Numbers l Biomass l Energy

24 Pyramids of Temperate Forests l Numbers l Biomass l Energy


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