Ecological Selection
In Biology of the evolution, the ecological selection (or selection of survival ) indicates one of the two forms of Natural selection. It corresponds so that one usually summarizes under the expression " struggle for life " , i.e. the mechanism which selects the individuals best adequate to resist the threats of the Environnement and to defend oneself in the Compétition for the Ressource S with the other members of their Espèce. The ecological selection is thus complementary to sexual Sélection which supports the individuals able to reproduce.
The individuals of a given species are subjected to various types of competitions with the other individuals living to them ecosystem. There is on the one hand the interspecific Compétition: to survive in a given medium, an organization must be able to escape or to protect themselves from the Prédateur S but also to resist the parasite S. And in addition, there exists also a intraspecific Compétition: individuals of the same species being in competition between them to find Ressource S in the environment, that they are nutritive preys or other resources not like shelters (Terrier, Nid,…).
In addition, the survival of the individuals also depends on their resistance to the factors known as abiotic which constitute the Biotope, for example, the ic conditions Climat, the physicochemical composition of the medium, etc
See too
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