Regenerative niche Malva alcea L. in the Crimean mountains

Abstract

The issue of the presence of a regenerative niche Malva alcea, recently discovered on the Ai-Petrinskaya Yila, is being discussed. This species is typical polycarpic grass, rooted, hemicryptophytes with summer-green vegetation type, entomogamous, barohor with generative propagation. The range of Malva alcea covers almost the whole of Europe, includingGreat Britain; it is also found inNorth America. To obtain an ambiguous answer, we used the original program for calculating the packing density of community species on gradients of factor conditions and resource factors: (illumination-shading, thermal mode, ombro mode, cryo mode, continentality, moistening, variability of moisture, substrate acidity, salt regime (anionic composition), carbonate content, nitrogen content, granulometric (mechanical) composition (porosity) of the substrate). Most often, the species can be found in the syntaxons included in the class - Onopordetea acanthii subsp. acanthii Braun-Blanquet 1964 em. Julve 1993, order - Onopordetalia acanthii subsp. acanthii Braun-Blanquet & Tüxen 1943 em. Görs 1966, union - Onopordion acanthii subsp. acanthii Braun-Blanquet 1936, which summarize the thermophilic ruderal communities of tall weed species. Based on the analysis results, it can be stated that the introduced species successfully occupied its ecological niche due to the successful differentiation of its fundamental niche into the realized niche of the existing plant community, as well as due to the availability of free resources in the ecotope, as evidenced by the negative value of the excess coefficient of the packing density curve.