What is an Ecosystem?. An ecosystem refers to the natural systems in which energy is passed from one organism to another and matter is recycled. An ecosystem includes all of the biotic and abiotic factors which are interrelated in an area. Ecology.
2. Biological resources: eg food, medicinal resources, wood products, ornamental species, breeding stocks and population reservoirs, and future resources
3. Social benefits: eg research and monitoring, recreation, cultural values, prevention of problems like salinity or soil erosion