- Slides: 14
1. 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 ”.
2. Trophic level �In 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. Producers �Producers : Producers are like plants and algae : they make their own food. Producers are eaten by herbivores.
4. Primary consumers �Primary consumers : Herbivorous organisms are primary consumers: they feed on plants and algae. Primary consumers are eaten of secondary consumers.
5. Secondary consumers �Primary consumers: Carnivorous organisms are secondary consumers: they feed on herbivorous. Secondary consumers are eaten of tertiary consumers.
6. Tertiary consumers �Tertiary consumers: Tertiary consumers feed on secondary consumers. Tertiary consumer are eaten by decomposers.
7. Decomposers �Decomposers: 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 chain �A 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 chain �An 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 web �A 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
Activities �Activities of trophic levels