The four types of interactions in communities are:
- Mutualism
- Parasitism
- Commensalism
- Competition
Definition of each interaction:
Mutualism:
The type of interaction in which both the species involved are benefited, it is called mutualism.
Parasitism:
The type of interaction in which one species is benefited, whereas the other is harmed, it is called parasitism.
Commensalism:
The type of interaction in which one species gets benefited without harming or providing benefits to others is called commensalism.
Competition:
The type of interaction in which both species lose is called competition. It is opposite of mutualism.
Symbiotic relationship:
It refers to the type of interaction in which lastly one species gets benefited. The type of interactions such as mutualism, commensalism, and Parasitism are considered as symbiotic relationship.