Abstract
The article represents the analysis of the ontogenetic composition and demographic parameters of 3 cenopopulations of Myricaria bracteata in the riverbed of the Ursul River (Central Altai). It was found that the ontogenetic structure and density of individuals depend on the degree of formation of the phytocenosis and the influence of abiotic factors (features of the substrate, river bend). The invasive cenopopulation formed in a bend of the river in the absence of a phytocenotic pressure; the young normal cenopopulation formed in the river deflection on the grasscover stony shore, and the invasive-regressive cenopopulation formed on an island washed by the river.
Highlights
The littoral of any water area is one of the dynamic zones that have a significant impact on coastal-aquatic vegetation
The study of the biology and population organization of fluviaphytes – plants that have adapted to sharp short-term flood flows – is one of the main tasks in ecology and has both theoretical and practical significance
It was found, the ontogenesis of M. bracteata individuals complete, plants consistently go through all ontogenetic states (p–s); morphrogenesis includes two phases: primary escape, primary bush
Summary
The littoral of any water area is one of the dynamic zones that have a significant impact on coastal-aquatic vegetation. The study of the biology and population organization of fluviaphytes – plants that have adapted to sharp short-term flood flows – is one of the main tasks in ecology and has both theoretical and practical significance. Myricaria bracteata Royal (family Tamaricaceae) grows as part of plant groups in river floodplains, and acts as one of the pioneering shrubs species providing the accumulation of the upper soil horizon. This species can be used as a universal model object for the constructing of succession series reflecting the mechanisms of overgrowing of river coastlines. The work objective is to study the population organization of M. bracteata in the meander of the Ursul River
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