Food chains food webs
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.food chains & food webs. ISN page 169. 169. f ood chains & food webs. Food Chain Food Web Arrows? Producers Consumers Primary Secondary Tertiary Pyramid of Biomass Rule:. Food C hain. A simple diagram that shows one part of an ecosystem.

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Food chains food webs

.food chains & food webs.

ISN page 169.


F ood chains food webs

169

food chains & food webs

  • Food Chain

  • Food Web

    • Arrows?

  • Producers

  • Consumers

    • Primary

    • Secondary

    • Tertiary

  • Pyramid of Biomass

    • Rule:


Food c hain

Food Chain

  • A simple diagram that shows one part of an ecosystem.

  • Transfer of energy from one organism to another


What is a food web

What is a food web?

  • Shows the interactions of predators and prey in an ecosystem


What do the arrows indicate in a food web

What do the arrows indicate in a food web?

  • They indicate the flow of energy from one organism to another.

  • If a worm is eaten by a robin, does the arrow point to the worm or the robin?


Food chains food webs

  • Producers make their food from the sun’s energy. They are also called autotrophs.

  • Name 2 producers

  • Algae, bladderwrack


Food chains food webs

  • Primary consumers eat producers. They are also called heterotrophs or herbivores.

  • Name 3 primary consumers.

  • Grey mullet, flat winkle, limpet, sea urchin


Food chains food webs

  • Secondary consumers eat primary consumers. They are also called carnivores.

  • Name 3 secondary consumers.

  • Crab, seal, lobster, herring gull


Food chains food webs

  • Tertiary consumers eat secondary consumers.

  • Are there any?

  • Yes…….seal, herring gull


Pyramid of biomass

Pyramid of Biomass

  • BIOMASS: how much a population of organisms weighs

  • The greatest amount of biomass is found in the producers.

  • The least amount in the tertiary consumers.


10 rule only 10 of the available energy passes on to the next trophic level

10% Rule: Only 10% of the available energy passes on to the next trophic level


F ood chains webs

food chains & webs


Food w eb practice 170

Food Web Practice: 170

  • Identify the:

  • 1. Producers

  • 2. Primary Consumers

  • 3. Secondary Consumers

  • 4. Herbivores

  • 5. Carnivores

  • 6. Omnivores

  • 7. What elements are missing from this food web?


Food chains food webs

ECOSYSTEMS NOTES

1. What happens to matter within a food chains?

2. What happens to energy within a food chain?

3. In a pyramid of numbers, what would you not expect to find ?

4. What is the carbon cycle?

5. What is a niche? Give an example.

6. What is an abiotic factor of an ecosystem?

7. What are ecosystems based on?

8. What do food producers need to make sugar?


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