PPT: Ecology | Environment for UPSC CSE PDF Download

 Page 1


E c o l o g y
Page 2


E c o l o g y
Introduction
E c o lo g y is defined as a scientific study of the 
relationship of the living organisms with each other 
and with their environment.
It deals with the ways in which organisms are moulded 
by their environment, how they make use of 
environmental resources including energy flow and 
mineral cycling.
Page 3


E c o l o g y
Introduction
E c o lo g y is defined as a scientific study of the 
relationship of the living organisms with each other 
and with their environment.
It deals with the ways in which organisms are moulded 
by their environment, how they make use of 
environmental resources including energy flow and 
mineral cycling.
History of Ecology
1
The classical texts of the Vedic period such as the 
Vedas, the Samhitas, the Brahmanas the 
Aranyakas - Upanishads contain many 
references to ecological concepts.
2
The Indian treatise on medicine, the Caraka - 
Samhita and the surgical text Susruta - Samhita.
3
Contain classification of animals on the basis of 
habit and habitat, land in terms of nature of the 
soil, climate and vegetation and description of 
plants typical to various localities.
4
Caraka- Samhita contains information where air, 
land, water and seasons were indispensable for 
life and that polluted air and water were 
injurious for health.
Page 4


E c o l o g y
Introduction
E c o lo g y is defined as a scientific study of the 
relationship of the living organisms with each other 
and with their environment.
It deals with the ways in which organisms are moulded 
by their environment, how they make use of 
environmental resources including energy flow and 
mineral cycling.
History of Ecology
1
The classical texts of the Vedic period such as the 
Vedas, the Samhitas, the Brahmanas the 
Aranyakas - Upanishads contain many 
references to ecological concepts.
2
The Indian treatise on medicine, the Caraka - 
Samhita and the surgical text Susruta - Samhita.
3
Contain classification of animals on the basis of 
habit and habitat, land in terms of nature of the 
soil, climate and vegetation and description of 
plants typical to various localities.
4
Caraka- Samhita contains information where air, 
land, water and seasons were indispensable for 
life and that polluted air and water were 
injurious for health.
Components of 
Environment
Abiotic
Energy, Radiation, 
Temperature, Water, 
etc.
Biotic
Plants, Animals, Man, 
Decomposer, etc
Page 5


E c o l o g y
Introduction
E c o lo g y is defined as a scientific study of the 
relationship of the living organisms with each other 
and with their environment.
It deals with the ways in which organisms are moulded 
by their environment, how they make use of 
environmental resources including energy flow and 
mineral cycling.
History of Ecology
1
The classical texts of the Vedic period such as the 
Vedas, the Samhitas, the Brahmanas the 
Aranyakas - Upanishads contain many 
references to ecological concepts.
2
The Indian treatise on medicine, the Caraka - 
Samhita and the surgical text Susruta - Samhita.
3
Contain classification of animals on the basis of 
habit and habitat, land in terms of nature of the 
soil, climate and vegetation and description of 
plants typical to various localities.
4
Caraka- Samhita contains information where air, 
land, water and seasons were indispensable for 
life and that polluted air and water were 
injurious for health.
Components of 
Environment
Abiotic
Energy, Radiation, 
Temperature, Water, 
etc.
Biotic
Plants, Animals, Man, 
Decomposer, etc
Levels of Organizations 
in Ecology
1
Individual
Individual-Organism is an individual living being that 
has the ability to act or function independently.
2
Population
Population-Population is a group of organisms 
usually of the same species, occupying a defined 
area during a specific time.