Open AccessFeatures of the spatial and ontogenetic structure of the <i>Stipa korshinskyi</i> Roshev. (Poaceae) cenopopulation
Author(s) -
Tatyana Evgenievna Zenkina,
Зенкина Татьяна Евгеньевна,
В Н Ильина,
Ильина Валентина Николаевна
Publication year - 2019
Publication title -
samarskij naučnyj vestnik
Language(s) - English
Resource type - Journals
eISSN - 2782-3016
pISSN - 2309-4370
DOI - 10.17816/snv201981103
Subject(s) - samara , stipa , population , range (aeronautics) , poaceae , biology , spatial distribution , botany , geography , ecology , demography , remote sensing , materials science , sociology , composite material
Mathematical methods of analysis of the spatial and ontogenetic structure of rare plant species cenopopulations allow us to reveal organization features of individual plant populations and phytocenoses as a whole. The authors study the features of the Stipa korshinskyi Roshev. (Poaceae) population structure in the Samara High Trans-Volga Region (Sernovodny Shihan, Sergievsky District, Samara Region). Spatial location and age conditions of individuals are determined according to traditional population-ontogenetic methods. The characteristics of the distribution of individuals of S. korshinskyi , taking into account their age, are determined using modern mathematical methods. With the help of the nuclear function, it was revealed that the density of the feather grass individuals in the described cenopopulation varied in the range of 1-3 individuals per 1 m. Analysis of S. korshinskyi individuals location intensity in coenopulation using the square method showed the presence of compacted and rarefied sections. The graphical interpretation of the Ripley function showed that in the studied cenopopulation the plants are randomly distributed. Using the distribution map of the dominant age states it was noted that the generative plants were closer to the periphery of the site. Graphic interpretation of Ripleys cross-function showed that young and mature plants are placed randomly in cenopopulation. Apparently, on the whole, the random nature of the individuals distribution is characteristic of S. korshinskyi cenopopulations experiencing a significant anthropogenic load in the composition of the phytocenoses.