Article
Article name Ecological Ordination of Steppe Communities of Transbaikalia
Authors Korolyuk A.Y. Doctor of Science (Biology), akorolyuk@rambler.ru
Bibliographic description
Section Botany
UDK 581.526.53 (1–925.16)
DOI
Article type
Annotation Ordination analysis of steppe communities prevalent in Transbaikalia is carried out. Indirect ordination made it possible to reveal a system of ecological factors responsible for differentiation of steppe vegetation. These are moisture, soil richness-salinity, rockiness and temperature characteristics of habitats. The steppes of Transbaikalia are shown to divide into two belt-zonal subtypes: meadow steppes and true steppes. Edaphic variants developing on salted, stony and sandy soils are distinguished. Two catenas of petrophyte steppe communities are described. The first one – cryopetrophyte catena – comprises three types of steppe communities: dominated by short bunchgrasses, Filifolium sibiricum or low herbs. The second one includes warm stony slopes covered with phytocoenoses of Artemisia gmelinii or Stipa grandis. Position of the steppe communities on moisture and richness-salinity gradients using ecological optimums of plant species has been defined. The boundary between the true steppes and meadow steppes subtypes in Transbaikalia is 49–50 grade level of moisture scale.
Key words steppes, vegetation, ordination, moistening.
Article information
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Full articleEcological Ordination of Steppe Communities of Transbaikalia