Lecture Notes
Introduction to Environment Microbiology
Defnition:
Environmental Microbiology is the branch of microbiology that studies microorganisms and
their interactions with the natural environment such as soil, water and air.
Explanation:
Microorganisms are present everywhere in nature. They play a very important role in
maintaining balance in ecosystems by recycling nutrients and decomposing organic matter.
Key Points:
Microorganisms include bacteria, fungi, algae and protozoa.
They are found in all types of environments.
They can be both beneficial and harmful.
MICROBIAL HABITATS
Microorganisms live in different natural environments. These environments are called habitats.
Soil Microbiology
Soil is the richest habitat for microorganisms.
It contains bacteria, fungi and actinomyctes.
Microbes help in decomposition and nutrient cycling.
They improve soil fertility.
Water Microbiology
Includes freshwater (rivers, lakes) and marine water (oceans).
Contains bacteria, algae and protozoa.
Microorganisms play a role in aquatic food chains.
, Air Microbiology
Air is not a natural growing habitat but carries microorganisms.
Microbes are present in dust particles.
Air helps in the transmission of diseases.
Important Points:
Soil has the highest number of microorganisms (Abundent)
Water supports active microbial growth. (Moderate)
Air mainly acts as a transport medium. (Low)
IMPORTANCE OF MICROORGANISMS IN ENVIRONMENT
Microorganisms are very important for the survival of life on Earth.
Major Roles:
1. Decomposition
Microorganisms break down dead plants and animals into simpler substances.
2. Nutrient Recycling
They recycle important nutrients like nitrogen, carbon and sulfur.
3. Soil Fertility
They improve soil structure and increase fertility.
4. Environmental Balance
They maintain ecological balance by supporting life processes.
Conclusion:
Introduction to Environment Microbiology
Defnition:
Environmental Microbiology is the branch of microbiology that studies microorganisms and
their interactions with the natural environment such as soil, water and air.
Explanation:
Microorganisms are present everywhere in nature. They play a very important role in
maintaining balance in ecosystems by recycling nutrients and decomposing organic matter.
Key Points:
Microorganisms include bacteria, fungi, algae and protozoa.
They are found in all types of environments.
They can be both beneficial and harmful.
MICROBIAL HABITATS
Microorganisms live in different natural environments. These environments are called habitats.
Soil Microbiology
Soil is the richest habitat for microorganisms.
It contains bacteria, fungi and actinomyctes.
Microbes help in decomposition and nutrient cycling.
They improve soil fertility.
Water Microbiology
Includes freshwater (rivers, lakes) and marine water (oceans).
Contains bacteria, algae and protozoa.
Microorganisms play a role in aquatic food chains.
, Air Microbiology
Air is not a natural growing habitat but carries microorganisms.
Microbes are present in dust particles.
Air helps in the transmission of diseases.
Important Points:
Soil has the highest number of microorganisms (Abundent)
Water supports active microbial growth. (Moderate)
Air mainly acts as a transport medium. (Low)
IMPORTANCE OF MICROORGANISMS IN ENVIRONMENT
Microorganisms are very important for the survival of life on Earth.
Major Roles:
1. Decomposition
Microorganisms break down dead plants and animals into simpler substances.
2. Nutrient Recycling
They recycle important nutrients like nitrogen, carbon and sulfur.
3. Soil Fertility
They improve soil structure and increase fertility.
4. Environmental Balance
They maintain ecological balance by supporting life processes.
Conclusion:
