The energy that living beings need to perform vital functions is obtained through food. According to their diet, living beings can belong to one trophic level or another. These trophic levels constitute the trophic chains, which are nothing more than abstract representations of the energy flows in ecosystems. It is sometimes difficult to distinguish between the concepts of food chain, food web and trophic level.
If you want to clarify all your doubts, consult this article by Ecologist Verde about what is a food chain and examples of this, where you will find the definition of food chain and you will also be able to know some of its main characteristics, as well as consult examples of terrestrial and aquatic food chains to facilitate understanding. In addition, in this article you will find information about what a food web is and how it differs from a food chain.
The food chain or food chain of an ecosystem It is a scheme in which the linear relationships between the species of organisms consumed and consumers are represented. That is, arrows show how energy is transferred from an organism, belonging to a lower trophic level, to another organism, which occupies a higher trophic level.
Some main characteristics of food chains are:
The amount of energy at each trophic level of the chain can be represented in trophic or ecological pyramids. At the base, with a greater accumulation of energy, are the primary producers (autotrophs). In the next level, the triangle that represents the energy used and accumulated is smaller (representing 10% of all the energy of the previous level), and so on. The available energy decreases rapidly, so these pyramids are not very long. Here you can learn more about what is a trophic pyramid and its types.
There are several types of food chains, according to the organisms that initiate them or are located at the base of them:
What examples of terrestrial food chain We indicate some of those that are given in the Mediterranean forest:
In aquatic ecosystems, food chains are longer. What examples of aquatic food chain We indicate you some marine trophic chain and some of fresh water.
The main difference between web and food chain is that the chains are isolated relationships of the food web. That is to say, the food web describes the set of food chains present in a given ecosystem.
For this reason the networks offer a more realistic representation of the nutritional relationships that occur in a community; however, they are more complex and difficult to represent and, therefore, it is often easier to study food chains separately. Here we tell you more about what are food webs and examples.
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