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Ecosystem Relationships GLE 0507.2.1 Investigate different nutritional relationships among organisms in an ecosystem. Summary Populations of living things interact with one another in communities. In an ecosystem, a community of living things interacts with many different nonliving things. When one thing changes in an ecosystem, other parts of the ecosystem are affected due to the complexity of relationships in an ecosystem. Ecosystem All the living and nonliving things that interact with one another in a given area Community A group of living things of different species found in an ecosystem Population All the members of the same type of organism living in an ecosystem Adaptation A trait or behavior that helps an organism survive Competition A contest among populations for the food, water, shelter, and space they need to survive Conservation The saving and protecting of natural resources Extinction The death of all the organisms of a species Habitat An area where an organism can find everything it needs to survive Pollution A waste product that harms living things and damages an ecosystem Predator An animal that kills and eats other animals Prey An animal that is eaten by a predator Reclamation The process of cleaning and restoring a damaged ecosystem Succession A gradual change in the kinds of organisms living in an ecosystem Symbiosis A relationship between two kinds of organisms What’s It Like Where You Live? Biomes of the World The World’s Biomes