Ecosystem Services- The benefits people obtain from ecosystems. These include provisioning services such as food and water; regulating services such as flood and disease control; cultural services such as spiritual, recreational, and cultural benefits; and supporting services such as nutrient cycling that maintain the conditions for life on Earth.
Provisioning Services - http://www.fao.org/ecosystem-services-biodiversity/background/provisioning-services/en/
Regulating Services - http://www.fao.org/ecosystem-services-biodiversity/background/regulating-services/en/
Supporting Services - http://www.fao.org/ecosystem-services-biodiversity/background/supporting-services/en/
Cultural Services - http://www.fao.org/ecosystem-services-biodiversity/background/cultural-services/en/