Transcription of 2 Ecosystems and Their Services
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2 Ecosystems and Their ServicesEXECUTIVE SUMMARY An ecosystem is a dynamic complex of plant, animal, and microorganism com-munities and the nonliving environment, interacting as a functional unit. Hu-mans are an integral part of Ecosystems . A well-defined ecosystem has strong interactions among its components andweak interactions across its boundaries. A useful ecosystem boundary is theplace where a number of discontinuities coincide, for instance in the distribu-tion of organisms, soil types, drainage basins, or depth in a water body. At alarger scale, regional and even globally distributed Ecosystems can be evalu-ated based on a commonality of basic structural units. Ecosystem Services are the benefits people obtain from Ecosystems .
2 Ecosystems and Their Services EXECUTIVE SUMMARY An ecosystem is a dynamic complex of plant, animal, and microorganism com- munities and the nonliving environment, interacting as a functional unit. Hu-mans are an integral part of ecosystems. A well-defined ecosystem has strong interactions among its components and weak interactions across its boundaries.
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