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Some examples of keystone species, and why they are considered keystone species Let us start by a pretty common example, such as the grey wolf (Canis lupus). This is an apex predator that feed on large herbivores such as moose, deer and roe deer, and are in many parts of the world important to keep these herbivore populations from growing too high.
Species interactions within ecological webs include four main types of two-way interactions: mutualism, commensalism, competition, and predation (which includes herbivory and parasitism).Because of the many linkages among species within a food web, changes to one species can have far-reaching effects.he keystone species concept is one of the best-known ideas in community ecology. Although it is true that many species potentially interact with one another in a food web such as depicted in Figure 1, in nature there are big players and little players. The biggest players of all are referred to as keystone species.