Page 5 - 2. Lesson notes-Food chain and Food web

Grass Deer Lion

(producer) (herbivore) (carnivore)

3. Four-step Food Chain

Grass Insect Insectivorous Bird Hawk

(producer) (herbivore) (carnivore I) (carnivore II

4. Five-step Food Chain
Grass Insect Frog Snake Peacock

(producer) (herbivore) (carnivore I) (carnivore II) ) (carnivore III)

Trophic levels in two-food chains

AQUATIC FOOD CHAINS

Phytoplankton Zooplankton Small Fish Larger Fish Shark
(producer) (herbivore) (carnivore I) (carnivore II) (carnivore III)

Phytoplankton Zooplankton Small Fish King Fisher

(producer) (herbivore) (carnivore I) (carnivore II)

TEN PERCENT LAW
The flow of energy between various components of the environment has been extensively
studied and it has been found that –

 The green plants in a terrestrial ecosystem capture about 1% of the energy of
sunlight that falls on their leaves and convert it into food energy.