write characteristics of food web?
Answers
in a food chain,
a) there is repeated eating in which each group eats the smaller one and is eaten by the larger one. Thus, it involves a nutritive interaction between the biotic components of an ecosystem.
b) the plants and animals which depend successively on one another form the limbs of a food chain.
c) there is unidirectional flow of energy from sun to producers and then to a series of consumers of various types. Thus, a food chain is always straight and proceeds in a progressing straight line.
d) usually 80 to 90% of potential energy is lost as heat at each transfer on the basis of second law of thermodynamics (transformation of energy involves loss of unavailable energy).
e) usually there are 4 or 5 trophic levels. Shorter food chains provide greater available energy and vice - versa.
f) omnivores occupy more than one trophic level and, some organisms occupy different trophic positions in different food chains.
A food web is a complex system formed by the interconnection of the food chains.
Explanation:
A food chain is a sequence of transmission of energy in the form of food due to the interaction between the living beings.
The food is transferred from the lower simple organisms like plants to more complex carnivores or humans.
When organisms of one food chain are consumed by organisms of other food chain then a food web is formed.
The following are the characteristics of the food web:
1. It helps in controlling the population of the living species.
2.The organisms at the top tropical levels will get variety of food due to interconnection of food chain.
3. An organism can play diversity of function in a food web a predator or prey.
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