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Ecology

An overview of Ecology

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ECOLOGY
ENVIRONMENTAL STUDIES
ABHIJITH RAJ. R, BSC,MSC
ECOLOGY (GK : OIKOS AND LOGOS)
• Ecology is the branch of biology that deals with the study of living system in
relation to their environment.
• According to the Taylor , Ecology is the science of all relation of all organisms to
all their environment.
• Andrewartha’s definition states that Ecology is the scientific approach to the study
of environmental interactions which control the welfare of living things ,
regulating their distribution , abundance , reproduction and evolution.
ECOSYSTEM
• An ecosystem is a system consisting of living and non living components that
function together as a unit.
• Simply, a place where community or group of living organism with non living
factors such as water, air , soil etc in mutual relationship constitute the ecosystem.
• Ecosystem is defined as a complex of living organisms, physical environment and
all their interrelationships in a particular unit of space.
STRUCTURE AND FUNCTION OF ECOSYSTEM
• The structure indicates compositional aspects of biotic community and the
functions means the rate of energy flow.
• Ecosystem composed of two major components Abiotic(non living), and
Biotic(living).
This Photo by Unknown Author is licensed under CC BY-SA
This Photo by Unknown Author is licensed under CC BY
ABIOTIC SYSTEM
• The non living factors or the physical environment prevailing in an ecosystem
form the abiotic components.
• It includes soil , water, land , air, minerals etc.
• Abiotic constituents are further classified into two;
• Physical constituents-Soil, temperature, light and water.
• Chemical constituents(inorganic and organic)-Carbon, hydrogen , nitrogen,
carbohydrates, fats, protein etc.
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Ecology

  • 2. ECOLOGY (GK : OIKOS AND LOGOS) • Ecology is the branch of biology that deals with the study of living system in relation to their environment. • According to the Taylor , Ecology is the science of all relation of all organisms to all their environment. • Andrewartha’s definition states that Ecology is the scientific approach to the study of environmental interactions which control the welfare of living things , regulating their distribution , abundance , reproduction and evolution.
  • 3. ECOSYSTEM • An ecosystem is a system consisting of living and non living components that function together as a unit. • Simply, a place where community or group of living organism with non living factors such as water, air , soil etc in mutual relationship constitute the ecosystem. • Ecosystem is defined as a complex of living organisms, physical environment and all their interrelationships in a particular unit of space.
  • 4. STRUCTURE AND FUNCTION OF ECOSYSTEM • The structure indicates compositional aspects of biotic community and the functions means the rate of energy flow. • Ecosystem composed of two major components Abiotic(non living), and Biotic(living).
  • 5. This Photo by Unknown Author is licensed under CC BY-SA This Photo by Unknown Author is licensed under CC BY
  • 6. ABIOTIC SYSTEM • The non living factors or the physical environment prevailing in an ecosystem form the abiotic components. • It includes soil , water, land , air, minerals etc. • Abiotic constituents are further classified into two; • Physical constituents-Soil, temperature, light and water. • Chemical constituents(inorganic and organic)-Carbon, hydrogen , nitrogen, carbohydrates, fats, protein etc.
  • 7. BIOTIC ECOSYSTEM • The living organism including plants, animals and microorganisms like bacteria, fungi, that are present in an ecosystem form the biotic components. • Biotic components are classified into producers (Autotrophs) and consumers(Heterotrophs). • Consumers are further classified into Macroconsumers and Microconsumers.
  • 8. This Photo by Unknown Author is licensed under CC BY-SA-NC
  • 9. This Photo by Unknown Author is licensed under CC BY-SA
  • 10. This Photo by Unknown Author is licensed under CC BY