These symbiotic associations can be divided into parasitism, mutualism and commensalism.
From the en.wikipedia.org
Commensalism benefits one organism and the other organism is neither benefited nor harmed.
From the en.wikipedia.org
Commensalism is a type of relationship among organisms in which neither organism is benefited nor harmed.
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It's a fascinating example of commensalism.
From the scienceblogs.com
Lichen associations may be considered as examples of mutualism, commensalism or even parasitism, depending on the species.
From the en.wikipedia.org
Depending on the context, they might be considered to be predator to prey communication, or to reflect forms of commensalism.
From the en.wikipedia.org
Commensalism describes a relationship between two living organisms where one benefits and the other is not significantly harmed or helped.
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This relationship is called commensalism because many other host species receive the benefits of clean air at no cost or harm to the associate tree species supplying the oxygen.
From the en.wikipedia.org
Commensalism is harder to demonstrate than parasitism and mutualism, for it is easier to show a single instance whereby the host is affected, than it is to prove or disprove that possibility.
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More examples
The relation between two different kinds of organisms when one receives benefits from the other without damaging it
In ecology, commensalism is a class of relationship between two organisms where one organism benefits but the other is unaffected. ...
A symbiotic relationship in which one species benefits and the other is not affected.
A situation in which two or more organisms of distant phylogeny use the same food resource without competition (noun); also adjective and noun commensal (from Latin, meaning feeding at the same table).
A type of interaction involving the joint utilisation of food, although the relationship is rarely equal, generally one member provides the food and the other consumes some part of it.
A form of symbiosis in which one organism benefits from the association but the other organism is unaffected.
In a symbiotic relationship, an association that is clearly to the advantage of one species while not harming the other
A form of symbiosis in which one species profits with no apparent benefit or cost on the other speecies (e.g. cattle egrets)(see also mutualism)
An interaction between two species in which individuals of one species benefit while individuals of the other species do not benefit and are not harmed. [14]