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Research Centre of the Dnipro Agrarian and Economic University in Pokrov (Ukraine). A-satellite image of the study area (1-reclaimed land; 2-mining quarry); B-technosoils profile; C-quarry panorama view. 

Research Centre of the Dnipro Agrarian and Economic University in Pokrov (Ukraine). A-satellite image of the study area (1-reclaimed land; 2-mining quarry); B-technosoils profile; C-quarry panorama view. 

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The ecological niche of Vallonia pulchella (Muller, 1774) was investigated by means of the general factor analysis of GNESFA. It was revealed that the ecological niche of a micromollusk is determined by both edaphic factors and ecological features of vegetation. Ecological niche optima may be presented by integral variables such as marginality and...

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... research was carried out at the Research Centre of the Dnipro Agrarian and Economic University in Pokrov (Fig. 1). The experimental site for the study of optimal regimes of agricultural recultivation was established in [1968][1969][1970]. Sampling was carried out on a variant of artificial soil (technozems) formed on red-brown clays (the geographic coordinates of the southwestern corner of the test site are 47°38'55.24"N.L., 34°08'33.30"E.L.). ...
Context 2
... in which 193 specimens of Vallonia pulchella (Muller, 1774) were found. Thus, the average density of this species in sod-lithogenic soils on red-brown clays during the study period was 1.84 ind./m 2 . In the spatial distribution of individuals, it manifests itself in the formation of "hotspots" -localities with a high concentration of mollusks (Fig. 1, 3). In order to describe the dependence of the mollusk population of Vallonia pulchella on environmental factors, along with the Pearson correlation coefficients (not taking into account the spatial context), I-Moran statistics were calculated (Table ...

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