NEET BIOLOGY Unit22 Ecosystem ECOSYSTEM cosystem can be visualized as a functional unit of nature which varies greatly in size from a small pong to a large forest or a sea. Many ecologists regarding the entire biosphere as a global ecosystem, as a composite of all local ecosystems on earth. Wise range of living organisms ar present on earth surface. All living organisms such as plants, animals and microorganisms interact among themselves and also with the surrounding physical environment and maintains a balance in nature. This forms a self sustaining or funtional unit of the living world known as Ecosystem. This sytem is too muc big so that is why it is divided into two parts: terrestial and aquatic. Forest,vgrasslands and desert are examples of terrestial ecosystems ; pond lake , wetland, river and estuary are examples of aquatic ecosystems. This chapter gives us an overview of different types of ecosystems, structural as well as functional aspects related to productivit...
