POPULATION ORGANIZATION OF MYRICARIA BRACTEATA (TAMARICACEAE) at different succession stages
Elena M. Lyakh1, Alexey Yu. Astashenkov1,2
1Central Siberian Botanical Garden, SB RAS, Novosibirsk, Russia
2Novosibirsk State University, Novosibirsk, Russia
Keywords: Tamaricaceae, Myricaria, coenopopulation, ontogenetic structure, Republic of Kazakhstan
Abstract
The analysis of the ontogenetic composition and demographic parameters of two cenopopulations (CP) of Myricaria bracteata Royle in the bed of the rivers in Republic of Kazakhstan is carried out. The studied coenopopulations of M. bracteata reflect the influence of abiotic and biotic factors on the process of population development during overgrowth of the winding river banks. It is established that the ontogenetic structure and density of individuals depends on the degree of formation of phytocenosis and abiotic factors, as well as on anthropogenic impact. Depending on floodplain width, free space and phytocoenotic environment, the ontogenetic spectrum of CP changes from left-sided incomplete to right-sided incomplete. The type and stability of CP changes in the series: unstable invasive (in a narrow floodplain) successive transitional young normal mature normal stable (in a wide floodplain).
|
