1. Introduction to
Ecosystems
An ecosystem refers to a community of living organisms together with
the nonliving components of their environment, interacting as a
system. This includes the interactions between organisms and their
physical environment. PRESENTED BY
PIYUSH KUMAR SHARMA
2301307(CIVIL)
2. Concept of an Ecosystem
1 Multifaceted
System
An ecosystem is a complex network of interactions involving biotic and
abiotic factors.
2 Natural Equilibrium
The concept emphasizes the delicate balance between living and non-
living elements.
3 Dynamic Nature
Ecosystems are dynamic, with constant changes and adaptations.
3. Structure of an Ecosystem
Biotic Components
Includes all living
organisms within the
ecosystem.
Abiotic
Components
Encompasses the non-
living elements such as
water, soil, and climate.
Trophic Levels
Indicate the position that
an organism occupies in
the food chain.
4. Function of an Ecosystem
1 Nutrient Cycling
Recycling of nutrients through
biological, geological, and chemical
processes.
2 Primary Production
Conversion of inorganic compounds
to organic matter by autotrophs.
3 Decomposition
Breakdown of organic matter into
simpler substances by detritivores
and decomposers.
4 Regulation
Ecosystems regulate essential
processes like air and water quality.
5. Energy Flow in the Ecosystem
1 Solar Energy
Initially captured by producers during photosynthesis.
2 Trophic Levels
Transfer of energy from producers to different trophic levels.
3 Heat Loss
Energy is lost at each trophic level due to metabolic processes.
6. Food Chains in Ecosystems
Producers
Convert solar energy into
organic compounds using
photosynthesis.
Primary Consumers
Feed on producers and
are preyed upon by
secondary consumers.
Secondary
Consumers
Prey on primary
consumers, forming
tertiary and higher level
consumers.
7. Ecosystems: Forest, Desert,
Grassland, Aquatic
Forest
Ecosystem
Characterized by
dense vegetation
and diverse animal
life.
Desert
Ecosystem
Marked by arid
conditions, limited
rainfall, and
specialized flora
and fauna.
Grassland
Ecosystem
Domination of
grasses with fewer
trees and diverse
herbivores.
Aquatic
Ecosystem
Comprising
freshwater and
marine ecosystems,
accommodating
various species of
fish and aquatic
plants.
8. Conclusion
In conclusion, ecosystems play a vital role in sustaining life on Earth,
showcasing the intricate relationships between living and non-living
elements.