Integrated Science: Food Chain, Web, Pyramid

IV. Food Chain, Web, Pyramid
A. Food Chain – sequence of organisms for which an organism is a source of food for the next; determines the transfer of energy (example: rice – chicken – humans)
B. Food Web – complex network of food chain (trophic levels: number of levels staring with producer / consumer level: starts with the 1st consumer)
C. Food Pyramid – graphic representation of the transfer of energy, biomass (numbers of organism) from one trophic level (feeding level) to the next
1. Pyramid of Energy – graphic representation of energy transfer
2. Pyramid of Biomass – graphic representation of amount of biomass (organic materials) of its trophic level. Biomass is the dry weight of organic materials; Unit area = Biomass
3. Pyramid of Number – graphic representation of the number of organisms in each tropic level

V. Graphs


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