Trophic Structure of Ecosystems

1. Trophic Structure of Ecosystems
Where does all life on Earth get
energy from?
By
Achudhan.D

2. Energy flows to and from the Earth.
Nutrients cycle within Earth.

3. What is TROPHIC STRUCTURE?
• A characteristic feature of any ecosystem,
measured and described either in terms of
the standing crop per unit area, or energy
fixed per unit area per unit time, at successive
trophic levels. It can be shown graphically by
the various ecological pyramids,

4. • Trophic Levels. All organisms in
an ecosystem can be placed in trophic levels
depending on what energy source they rely
upon and how they provide energy for other
organisms in the food web.
• Trophic structure refers to the way in which
organisms use food resources. to get their
energy for growth and reproduction, and is
often refered to in. simple terms as the “food
web” or “food chain”. A healthy marine
ecosystem. consists of trophiclevels that have
complex linkages to form a food web.

5. What is TROPHIC LEVEL?
• broad class of organisms within
an ecosystem characterized by mode of food
supply. The first trophic level comprises the
green plants, the second is the herbivores and
the third is the carnivores which eat the
herbivores.

6. • Trophic structure,
The amount of energy at
each trophic
level decreases as it
moves through an
ecosystem. As little as 10
percent of the energy at
any trophic
level is transferredto the
next level; the rest is lost
largely through metabolic
processes as heat.

7. What is the flow of energy?
• The amount of energy at each trophic
level decreases as it moves through an
ecosystem. As little as 10 percent of
the energy at any trophic
level is transferredto the next level; the rest is
lost largely through metabolic processes as
heat.

10. Energy flow and tropical levels