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Ecosystem functions and services

CHAPTER 3 Ecosystem functions and servicesCagan H. SekerciogluIn our increasingly technological society, peoplegive little thought to how dependent they are onthe proper functioning of ecosystems and thecrucial services for humanity thatflow fromthem. Ecosystem services are the conditionsand processes through which natural ecosystems,and the species that make them up, sustain andfulfill human life (Daily 1997); in other words, the set of Ecosystem functions that are useful tohumans (Kremen 2005). Although people havebeen long aware that natural ecosystems helpsupport human societies, the explicit recognitionof Ecosystem services is relatively recent(Ehrlich and Ehrlich 1981a; Mooney and Ehrlich1997).

andinnumerableother oxygen-dependent organ-isms to survive. Oxygen also enables the atmo-sphere to “clean” itself via the oxidation of compounds such as carbon monoxide (Sodhi et al. 2007) and another form of oxygen in the ozone layer, protects life from the sun’s carcino-genic, ultraviolet (UV) rays. Global biogeochemical cycles consist ...

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