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An example of mutualism is the relationship between the Egyptian plover and Commensalism: only one species benefits while the other is neither helped nor. Examples of mutualistic relationships include oxpeckers and cattle, and sea anemones and clownfish. In the case of clownfish and sea. Symbiosis is any type of a close and long-term biological interaction between two different . An example of mutualism is the relationship between the ocellaris clownfish that dwell among the tentacles of Ritteri sea anemones. The territorial.
In a parasitic relationshipthe parasite benefits while the host is harmed. Parasitism is an extremely successful mode of life; as many as half of all animals have at least one parasitic phase in their life cycles, and it is also frequent in plants and fungi. Moreover, almost all free-living animal species are hosts to parasites, often of more than one species.
Mimicry Mimicry is a form of symbiosis in which a species adopts distinct characteristics of another species to alter its relationship dynamic with the species being mimicked, to its own advantage.
Batesian mimicry is an exploitative three-party interaction where one species, the mimic, has evolved to mimic another, the model, to deceive a third, the dupe. In terms of signalling theorythe mimic and model have evolved to send a signal; the dupe has evolved to receive it from the model. This is to the advantage of the mimic but to the detriment of both the model, whose protective signals are effectively weakened, and of the dupe, which is deprived of an edible prey.
For example, a wasp is a strongly-defended model, which signals with its conspicuous black and yellow coloration that it is an unprofitable prey to predators such as birds which hunt by sight; many hoverflies are Batesian mimics of wasps, and any bird that avoids these hoverflies is a dupe.
Amensalism is an asymmetric interaction where one species is harmed or killed by the other, and one is unaffected by the other. Competition is where a larger or stronger organism deprives a smaller or weaker one from a resource.
Antagonism occurs when one organism is damaged or killed by another through a chemical secretion. An example of competition is a sapling growing under the shadow of a mature tree. There are many examples in nature of two organisms living in close association with each other. The relationship can consist of two animals, two plants, a plant and an animal, or even a fungus and an algae such as in lichens.
Biologists have tried to give names to and define certain examples of 'living together' such as 'symbiosis' and 'mutualism' and 'parasitism' but it is often difficult to know where one type of association ends and another begins.
It is probably better to think of these associations as part of a broad continuum ranging from free-living organisms that depend on others for food, to two organisms that will not survive unless they are always together such as the alga and fungus that combine to form each lichen 'species'.
Here are definitions of a few of the most common words used by biologists to classify such inter-relationships.
The Sea Slug Forum - Symbiosis, commensalism, mutualism and parasitism
This comes from a Greek word simply meaning 'living together' and can be used to describe any association between two organisms. In this association one organism [the commensal] benefits, and the other [the host] is apparently unaffected.
This description would also fit the relationship between a carnivore and its live prey and a herbivore and the plant it feeds on, especially if they are very specialized in the food they eat. We normally define parasites as orgamisms which cannot survive without their host and have special modifications to their body or their life cycle for this association.
In many ways though, the difference between a lion eating a gazelle and a flea feeding on a dog, is a matter of relative size.
Many sea slugs have evolved close relationships with other organisms. The simplest associations are the many nudibranchs which are permanently found on, or close by, the organisms they feed on. These in include dorids and their sponges, aeolids on their cnidarians, polycerids on their bryozoans.