Accommodation (ecology)

Types of placement of individuals of two coenopopulation plants: A - diffuse non-segregated (non-disconnected); B - group non-segregated; B - group segregated; G - group partially segregated; D - diffuse partially segregated; E - partially grouped and segregated (Greig-Smith, 1964)

Placement ( Ramensky , 1929), distribution , physiognomic homogenity ( Sukachev , 1927), public ( Brown-Blanke , 1928), accuracy (Ramensky, 1938), pattern (pattern: Greig-Smith, 1952) - distribution pattern of individuals and populations in biocenosis . It largely depends on the biology of the species, in particular on the mode of reproduction and settlement, and on the conditions of the biocenotic environment - the uniformity of the bedding layer, rotting fodder, necropodia. It is necessary to distinguish diffuse , or uniform , group and spotty (clones of vegetatively mobile plants) placement. The latter is often called contagious . Groups and spots of different species can be segregated and non-segregated , and, in the structure of the main layer, they play the role of a parcel , a minor one - microcenoses . A number of invertebrates and vertebrates can normally exist and have high produktivivnost only with group placement (" group effect "). Biocenoses with a diffuse distribution of plants are often called diffuse , and with contagious plants, they are called mosaic .

It should be borne in mind that organisms in biocenoses, or price ecosystems, are located not only in one plane, but in three-dimensional space, in various biohorizon (lichens, arthropods, birds, and other vertebrates). This also applies to aquatic ecosystems.

Placement is examined both by eye and by more accurate methods: projections (with determination of areas of individuals, groups and spots), measurements, occurrences, often using mathematical methods.