Webster Dictionary(0.00 / 0 votes)Rate this definition: 1  Construct(verb) to put together the constituent parts of (something) in their proper place and order; to build; to form; to make; as, to construct an edifice. 2  Construct(verb) to devise; to invent; to set in order; to arrange; as, to construct a theory of ethics.
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.
Interactions that are long term and include parasitism, which is one species living on or in another with a cost to the host; mutualism, where both species interact and benefit from it and commensalism, this is the coexistence of a species that has neither benefit or cost.nteractions that are long term and include parasitism, which is one species living on or in another with a cost to the host; mutualism, where both species interact and benefit from it and commensalism, this is the coexistence of a species that has neither benefit or cost.