Поливариантность пространственно-возрастной структуры ценопопуляции подроста сосны крымской (Pinus рallasiana D. Don)

Abstract

Studies of the processes of natural renewal of Crimean pine, carried out during 2018–2019, on the mountain ranges of the Yalta Mountain Forest Reserve allowed us to establish a number of the following features. The surge of renewal is transient in time and the basis of the coenopopulations of undergrowth at the object of research is made up of plants that appeared in the first two post-fire years. Individuals that appeared in subsequent years occupy vacant places in the conditions of existing renewal niches, complementing the structure of the age spectra of pine undergrowth, emphasizing the asymmetry of the spectral distribution series. On the one hand, the spatial structure of undergrowth coenopopulations is a representation of the “matrix” of forest fire, on the other hand, it is determined by the structure of pine trees’ fruiting. The monotonous decrease in the density of the population field of undergrowth, due to the remoteness of the walls of the mother plantings and the specifics of seed dispersal, is supplemented by the alternation of undergrowth biogroups of increased density. The presence of areas of increased density against the background of constantly decreasing density of plants with a distance from the walls of the mother plant is predetermined by the influence of testes and seed curtains preserved during the fire. At each specific point in the renewal space, the structure of the process or its shape will be determined by the influence of external environmental and internal endogenous factors due to the biogroup effect of plant groupings. Polyvariance of the spatio-age structure of the undergrowth in the gorelnik space is the result of autoregulation of the cenopopulation structure in accordance with the capacity of the existing renewal niches.