Trophic relationship

Trophic relationship are important connections between the organisms within an ecosystem. They are the feeding relationships between organisms that “ eat ” and organisms that “ are eaten ”.

1.Trophic relationship

2. Trophic levelIn a ecosystem ,we can group organisms by

the thing that they feed on .Each group forms a different trophic level.

Trophic level : The trophic level of an organism is the position it occupies in a food chain. trophic level has five groups: the producers ,the primary consumers ,the secondary consumers ,the tertiary consumers and the decomposers.

3.ProducersProducers : Producers are like plants and algae : they make their own food. Producers are eaten by herbivores.

4.Primary consumersPrimary consumers : Herbivorous organisms are primary consumers: they feed on plants and algae. Primary consumers are eaten of secondary consumers.

5.Secondary consumersPrimary consumers: Carnivorous organisms are secondary consumers: they feed on herbivorous. Secondary consumers are eaten of tertiary consumers.

6.Tertiary consumersTertiary consumers: Tertiary consumers feed on secondary consumers. Tertiary consumer are eaten by decomposers.

7.DecomposersDecomposers: Fungi and bacteria are decomposers: they break down the remains of dead organisms. Decomposers eat producers, primary, secondary and tertiary consumers.

8.Trophic or food chainA trophic chain and food chain: A trophic chain or food chain represents the interrelationships between organisms on different trophic levels.

9.An example of food chainAn example of food chain: In nature, ecosystem include more than one food chain. For example, in a country field, there can be plants that provide food for insects, but snails and mice eat the plants too. Frogs eat the insects, along with spiders , worms and slungs.

10.Trophic or food webA trophic web or food web: A trophic web or food web represents all the different food chains within an ecosystem.

Video of food chain:A video of a food chain

ActivitiesActivities of trophic levels

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