Section 2

Ecology of Organisms

• A niche is a way of life, or a role in an ecosystem.

• Some species survive unfavorable environmental

• Both biotic, or living, factors and abiotic, or nonliving, factors influence organisms. Examples of nonliving things are climate, sunlight, and pH.

Vocabulary habitat (p. 363) biotic factor (p. 363) abiotic factor (p. 363)

tolerance curve (p. 363) acclimation (p. 364) conformer (p. 364)

regulator (p. 364) dormancy (p. 365) migration (p. 365)

niche (p. 365) generalist (p. 365) specialist (p. 365)

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