Ecosystem Class 12 Notes Biology Chapter 14 - CBSE
What are Ecosystem?
Arthur Tansley first defined the term Ecosystem. It is the functional unit of nature, where living organisms nteract among themselves and with the surrounding environment.
Types of Ecosystem Based on Nature
Manmade / Artificial
Structure Of Ecosystems
An Ecosystem has two components:
Functioning Of An Ecosystem
It is the process of breaking down of dead organic matter into smaller organic or inorganic molecules.
Pyramids represents the relationship between organisms at different trophic levels in terms of their number, biomass or energy.
Predictable and orderly change in the composition or structure of a community and it can be initiated either by formation of new or unoccupied habitat.
Sere – entire sequence of community that successively change in a given area.
Ways to avoid Self-pollination
The Nutrient Cycle/biogeochemical Cycle
Living things perform a host of ecological services that help maintain life, natural systems, and moderate conditions on our planet.