What is the role of ecological niches in community life?

The concept of ecological niche is very useful for understanding the laws of coexistence of species. For example, any green plant, taking one or another part in the formation of biogeocenosis, ensures the existence of a number of ecological niches. Among them there may be niches, including organisms that feed on root tissues (root beetles) or leaf tissues (leaf beetles and suckers), flowers (flowering beetles), fruits (fruit-eaters), root secretions (ekcisotrophs), etc. All together they form an integral system of diverse use plant body mass. Moreover, all heterotrophs eating plant biomass almost do not compete with each other.
Each of these niches includes groups of organisms that are heterogeneous in species composition. For example, the ecological group of root eaters includes both nematodes and the larvae of some beetles (May beetle, nutcracker), and bugs, aphids are in the niche of sucking plant juices.
Ecological niches of animals feeding on plant biomass
Ecological niches of animals feeding on plant biomass
Groups of species in the community that have similar functions and niches of the same property, some authors call guilds (guild of root eaters, guild of nocturnal predators, guild of scavengers, etc.).

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