This presentation provides basic information on abiotic and biotic components of ecosystem and their interactions.

1. ENVIRONMENTAL
SCIENCE
Srinivas Sakhamuri-Ph.D

2. Interactions in Ecosystem

3. Outcomes
Demonstrate an understanding of the
interactions of biotic and abiotic
elements in an ecosystem

4. Lesson Objectives
•Define biotic factors, abiotic
factors and interactions.
•Identify the examples for biotic
factors, abiotic factors and
interactions.

5. Abiotic Component
A+BIOTIC
Without Life
Definition: component of an ecosystem without
life is called as the abiotic component of the
ecosystem.

6. Abiotic Components
 Water
 Soil
 Sun Light
 Temperature
 Day Length
 Humidity
 Precipitation
 pH
 Amount and type of
nutrients
 Oxygen
 Wind
 Seasonality
 Topography
 UV radiation
 Weather
 Climate

7. Biotic Component
 Self
nourishing
 Synthesize
food by
photosynthesi
s/
Chemosynthe
sis
 Eg: All green
plants and
 Consumers
 Different types
 Primary(Herbivore
s)
 Secondary
Carnivores
 Tertiary carnivores
Autotrophs Heterotrophs
Detrivores
Decompositio
n
Mineral
cycling
Decomposers

8. Identify
Draw a square or circle on any component
Square = Abiotic Circle = Biotic

9. Interactions

10. Study check
1. Dynamic equilibrium in an ecosystem is
resultant of
a. Biotic factors b. Abiotic factors c. Both of
them
2. Carbon dioxide is released into air by
a. Plants b. Animals c. microbes d. All the
above
3. Intra-actions in biotic factors leads to
a. Equilibrium b. Energy flow c. Stability
4. Humidity in air is formed by the interaction of
a. Abiotic components b. Biotic componentts

11. Check your understanding
1. C
2. D
3. B
4. A

12. Summary