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In Ecosystems. Organisms tend to get phosphorus from their local ecosystem. An  organism can also get nitrogen from its local ecosystem. Nitrogen  is added to the organism's local ecosyste â¦ m by bacteria from the  air.
Section 1-1 Living Things and the Environment. All living and nonliving things that interact in a particular area make up an ecosystem. The place where an organism lives and that provides the things the organism needs is called its habitat. Needs include food, water, and shelter. A single ecosystem may contain many habitats. The living parts of an ecosystem are called biotic factors.