commensalism
This term describes a neutral-positive biological interaction, distinguishing it from mutualism where both parties benefit, or parasitism where one is harmed. It evokes an image of a "hitchhiker" or a scavenger that utilizes the leftovers or presence of another species without causing any disruption to the host's life cycle.
In a technical sense, the word is treated as an uncountable mass noun because it refers to a biological concept or a state of being rather than a discrete object. It does not have a plural form in standard scientific discourse, as it describes the phenomenon of the relationship itself.
Meanings
A biological relationship between two species in which one organism benefits from the association while the other is neither helped nor harmed.
The relationship between cattle egrets and grazing livestock is a classic example of commensalism.
Examples
This is commensalism.
Commensalism is a link.
Is this relationship an example of commensalism?
Commensalism differs fundamentally from mutualistic symbiosis.
Analyze the impact of commensalism on biodiversity.