Population - all the members of one species in a habitat, Habitat - the geographical area occupied by an ecosystem, Producer - The first organism in a food chain, Pyramid of numbers - Number of organisms at each trophic level, Pyramid of Biomass - representation of biomass at each trophic level, Food Web - all interconnected food chains in an ecosystem, Primary consumer - the second organism in the food chain, Ecosystem - flows and stores of energy and matter, Autotroph - capable of making organic molecules/food,

Ecosystem Key Terms

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