Biosphere, Habitat, Biome

  • The biosphere is that part of the Earth where living things thrive and live. It is the portion of the planet that can sustain life.
  • The Earth has three other spheres: the atmosphere, the lithosphere, and the hydrosphere. However, not all of them are inhabited by living things.
  • The portions or regions where organisms are found are collectively called the biosphere. Thus, it can also be said that the biosphere is the sum of all the ecosystems on Earth.
  • The biosphere is a term that encompasses all the ecosystems on Earth. It, therefore, includes both non-living elements (like sunlight and water) and living organisms.



The biosphere is mainly described by the reference of the whole life and living organisms around the Earth. It consists of five levels of organizational structure:

(1) Biomes

The large biosphere is divided into large parts of biomes. Scientists classified biomes into five different types: tundra, grassland, forests, deserts, and aquatic biomes.

(2) Ecosystem

The ecosystem is made up of a biological community and the physical environment. And so it includes both the biotic and abiotic factors. The living things and their physical environment function together as a unit.

(3) The community of Species

A biological community, though, is defined as the assemblage of interacting organisms (either of the same or different species) coexisting in a particular area and time.

(4) Population

All the members of the particular species living in the single habitat are known as  Population The population size can vary from a few to thousands of members.

(5) Organisms

The organisms are the living entities of the biosphere.


The biosphere is the connection between the healthy life of the living organisms and their interactions. The little change in the biosphere can cause a large impact on the lives of living organisms. However, this connection makes the biosphere important for every living thing. Some of them are listed below:

  • Promote life on Earth-The main reason and importance of the biosphere are that it promotes life on the Earth. Adapting to various environmental change, favorable climatic conditions, and the source of energy as food, all the living organisms on the Earth uphold the life on earth surface:
    Organic matter:
  • The biosphere helps in recycling nutrients, like oxygen and nitrogen, to sustain life on Earth.
  • Provide food or raw material- Every living thing needs food to survive; thus, the biosphere plays an important role in providing food to different animals and plants.

A biome is a large geographical area of distinctive plant and animal groups which are adapted to that particular environment.

  • Most terrestrial biomes are defined by the dominant plant life. The plant life is determined in part by the climate in a region, and climate is controlled by many factors, including latitude and geography.
  • The distribution of biomes is determined by environmental conditions, which must be appropriate to support the dominant species. Moisture and temperature are usually the most important environmental influences on the distribution of terrestrial biomes