The fauna and population of Collembola in the Male Polissia agrocenoses

Abstract

There was conducted analysis of taxonomic and synecologic structure of collembola' communoties in five most widespread types of Small Polissya's agrocenosis, in particular, wheat, rape, soy, potato and corn. It was discovered that explored communities of Collembola are characterized by their high species riches (more than 49 species from 35 genera and 12 families) and for their variability of indexes density, equalization of the population and species diversity. Under the influence of agricultural using lands for arable were fixed many-sided and often not predicted changes of synecological structure of collembolan cenotical communities. Separately, it was installed expansion of collembolan' mass circle forms as part of agrogroups, comparatively with natural cenoses, appearance of specific dominants and the emergence of different species' superdominance. It was conducted that in different types of Small Polissya`s explored agrocenosis can potentially dominate 31 collembola`s species? to their total share belong 75,1-100% of all coenotic groups` number. There were calculated and analyzed point alpha-variety, coenotic alpha-variety, internallycoenotic beta-variety indices of Simpson, Berger-Parker, Shannon and Shannon`s index of leveling. Spectra of collembolan' life forms are characterized by their own specificity as in different types of agrocenosis, so in different variants for certain type. In structure of collembolan' biotopic groups was noticed increase to 50% species' representation, which are resistant to the dry environment. Also, explored agrocenosis are characterized by their sharp reduction of hydrophilic collembolas` fraction in comparison with forest and meadow cenosis of explored district (conducted 3 species from hydrophilled and hydromesophilled complexes. Analysis of collembola`s life forms correlation showed that for species riches in explored agrocenosis most often prevail representatives of upper lobe biomorph, 11-80,9% of coenotic variety. Similar structure of collembolas` life forms` spectras is also noticed in forest, meadow and meadow-stewed biotops of latitudinal zones of Ukraine`s broadleaf and mixed forests.