1. Energy Flow Through Ecosystem Presented by AYAN KUMAR DHAR Roll No

2. ECOLOGY & ECOSYSTEM
The branch of science which deals with the study of interactions that take place between organisms and their environment A community and its physical environment treated together as a functional system

3. ENERGY FLOW
It is a process by which solar energy is transfer from one organism to another as chemical energy.
It includes:
Acquisition of energy
Conversion of energy
Use of energy
Transfer of energy

4. SOURCE OF ENERGY

5. How is solar energy converted to chemical energy?

6. 6CO2 + 6H2O + sunlight & chlorophyll C6H12O6 + 6O2
STARTING WITH:
6CO2 + 6H2O + sunlight & chlorophyll C6H12O6 + 6O2

7. Organisms that can make glucose during photosynthesis are called PRODUCERS & use most of the energy they make for themselves

8. The energy that is not used by producers can be passed on to organisms that cannot make their own energy.

9. Organisms that cannot make their own energy are called CONSUMERS.

10. Consumers that eat producers to get energy:
Are primary consumers or herbivores (plant-eaters)

11. Most of the energy the primary consumer gets from the producer is used by the consumer.

12. Some of the energy moves into the atmosphere as heat.

13. Some energy in the primary consumer is STORED & not lost to the atmosphere or used by the consumer itself. This energy is available for another consumer (predator).

14. A Consumer that Eats Another Consumer for Energy:
Is called a secondary consumer

15. Most of the energy the secondary consumer gets from the primary consumer is used by the secondary consumer.

16. Some of the energy is lost as heat, but some energy is stored and can passed on to another consumer.

17. A consumer that eats a consumer that already ate a consumer:
Is called a tertiary consumer

18. Consumers that eat producers & other consumers
Are called omnivores
Omnivores eat plants and animals

19. Consumers that hunt & kill other consumers are called predators
Consumers that hunt & kill other consumers are called predators. The animals that are hunted & killed are called prey.

20. Consumers that eat other dead consumers are called scavengers

21. The transfer of energy from the sun to producer to primary consumer then to higher order consumers can be shown in a FOOD CHAIN.

22. Another way of showing the transfer of energy in an ecosystem is the ENERGY PYRAMID

23. ENERGY PYRAMIDS
Amount of available energy decreases for higher consumers

24. LINDEMANN 10% LAW
Only 10% of the energy is transferred from producer to primary, primary to secondary & secondary to tertiary consumers 100»10»1

25. THANK YOU