Chapter 2.2

Nutrition and Energy Flow

2.2 Nutrition and Energy Flow Autotroph- uses sunlight or

chemical compounds to make own nutrients Ex. Plants, and some single-celled

organisms like algae Also known as producers

dnr.metrokc.gov/.../photos/SwimBeach005.jpgwww.cwss-scm.ca/Weeds/images/SDknotweed_flowe...

2.2 Nutrition and Energy Flow Heterotroph- must feed on other

organism to get energy/nutrients Herbivores - Carnivores – Scavengers – Omnivores - Decomposers –

Responsible for recycling nutrients

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2.2 Nutrition and Energy Flow Flow of Matter and Energy

All energy starts with sunlight. Food chain Trophic Level

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2.2 Nutrition and Energy Flow Food Web- more realistic

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2.2 Nutrition and Energy Flow Pyramid of Energy

Energy available is only 10% of the previous trophic level’s energy.

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2.2 Nutrition and Energy Flow Pyramid of Numbers - # of

consumed organisms

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www.ux1.eiu.edu/~cfruf/images/bio3002/trophic...

2.2 Nutrition and Energy Flow Pyramid of Biomass

Biomass – total mass or weight of all living matter in a given area.

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