Difference between: Environmental Microbiology

This series includes the difference table between

  • Habitat and Niche
  • Autochthonous and Allochthonous
  • Neuston and Pleuston
  • Extremophile and Extremozyme
Habitat Niche
A habitat is an ecological or and environmental area that is inhabited by a particular animal, plant or other types of organisms. A niche is a term describing the role and position of a species in its environment.
Habitat is made up of physiological factors and biotic factors. A niche is introduced all interactions with the biotic and abiotic factors.
It is mainly a geographical area with different kinds of organisms. It mainly describes how an organism meets all physiological needs.
It is emphasized on ecological area. It emphasizes on the function of an organism.
The concept of habitat is more easier than niche. The study or concept of niche is more difficult.
A niche doesn’t has components. Habitat has a number of niches.


Autochthonous Allochthonous
Autochthonous microorganisms are permanent members of a given ecosystem. Allochthonous microorganisms are foreign members of a given ecosystem.
Capable of survive, grow in a given ecosystem. Can not grow in the given ecosystem.
They are not transient members. They are transient members.
Organisms don’t show wide variety. Organisms show a great variation.
They occupy the functional niche available to the microbial population in a given ecosystem. They do not occupy the functional niche.


Neuston Pleuston
The uppermost layer of hydrosphere. The uppermost layer of marine ecosphere.
It is the surface microlayer between hydrosphere and atmosphere. It is the surface microlayer between marine ecosphere and atmosphere.


Extremophile Extremozyme
Organisms that thrives in extreme environment. Certain type of enzyme derived from an extremophile.
Found normally near the rocks near the hydrothermal vents. Synthesized inside extremophile.
Already there structure are highly studied. Study is still undergoing on these enzyme.
This term frequently refers to prokaryotes. This simply  means complex type of enzyme.
Example:Pyrolobus fumariiPyrococcus furiosus, Clostridium paradoxum etc. Example: Thermophilic esterase,  Thermophilic lipase etc.

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