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Intro 5/2/12. Where did these acorns come from? What kind of animal might eat these? What kind of animal might eat the animal that ate the acorns? What was the original source of energy in the food chain?. Food Web. Add this on to yesterday’s notes!.

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Intro 5/2/12

  • Where did these acorns come from?

  • What kind of animal might eat these?

  • What kind of animal might eat the animal that ate the acorns?

  • What was the original source of energy in the food chain?


Food web
Food Web

Add this on to yesterday’s notes!

  • A diagram that shows all the possible food chains in an ecosystem.

  • Same rules apply to food webs that apply to food chains.


Ecological pyramids diagrams that show how energy flows through ecosystems
Ecological Pyramids: Diagrams that show how energy flows through ecosystems

  • Food chains will usually be no longer than 5 trophic levels.

  • Not all the energy that is stored in one level is passed on to the next level.

  • After the energy enters the body of an animal, it is used up for life processes:

    • Respiration

    • Movement

    • Growth


Pyramid of energy
Pyramid of Energy:

  • Shows the amount of available energy at each trophic level.

    10% RuleOnly about 10% of the total energy is transferred from one level to the next.


Pyramid of numbers
Pyramid of Numbers:

  • Shows that population size decreases at each higher trophic level.

Think about it… Smaller organisms tend to be present in larger quantities!


Pyramid of biomass
Pyramid of Biomass:

  • The total weight of living matter at each trophic level.

Food for thought…

If our species continues to overcrowd its means, what will happen to the available resources at the bottom of the pyramid?


Halloween story
Halloween Story

You were walking home from trick-or-treating with a mouth full of candy when a land shark came out of nowhere… and ate you!


How much of the energy from the candy does the land shark get
How much of the energy from the candy does the land shark get?

Candy Serving Size Calories/serving

Whoppers 6 180

Reeses 1 90

Hersheys 3 200

Kit-Kat 3 210

Butterfinger 2 170

Starburst 4 160


HW: get?

C#2


5 3 12 food webs game
5/3/12 get?Food Webs Game


Today swamp food web lab
Today: Swamp Food Web Lab get?

  • Packet contains

    • Organism cards

    • Information sheet

    • Chalk

  • Steps

    • Make a food chain using 4 cards.

    • Draw arrows using chalk

    • Add more organisms to show more feeding relationships (make a food web)

    • Try to use every card in your deck!

    • Show Mrs. G your finished food web to get your points!

  • CLEAN-UP

    • Wet a paper towel and erase your table!

    • A dirty table will result in points off your lab!


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