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The balance of species in an ecosystem depends on the natural features of the environment such as the nutrient status, climatic conditions, water and light, as well as the relationship with other organisms including predators and agents of disease.

“An ecosystem is a dynamic complex of plant, animal and micro-organism communities and the non-living environment interacting as a functional unit.” (UK Millennium Ecosystem Assessment, 2005)

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IEMA is the membership body for environment and sustainability professionals