Spatial organization of Cyclachaena xanthiifolia (Nutt.) Fresen. populations on the railway line

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Abstract

The spatial structure of populations under the conditions of anthropogenic impact is a very important indicator that reflects the behavioral patterns of the species, such as changes in the structure and aggregation of individuals. Quarantine weeds are the object of ecologists’ close attention, as these weeds carry the greatest danger to the population, since they most often cause pollinosis and a significant deterioration in the quality of life during seasonal outbreaks of the disease. That is why they should be investigated by methods of analyzing the spatial structure of their populations. Railways are considered to be corridors along which quarantine weeds and other alien and invasive species are able to spread to new territories. Spatial behavior of species, formation of aggregations and large clusters, or a uniform distribution of individuals can reveal a fundamental relationship between the conditions of anthropogenic impact along the right-of-way and the spatial structure of populations. Along the Kinel-Bezenchuk Kuybyshev railroad in the spatial structure of the population of Cyclachaena xanthiifolia (Nutt.) Fresen. there is a group and uniform distribution of individuals. Aggregation of individuals in clusters (group distribution) are found in the places with the highest anthropogenic load.

About the authors

Nikolay Alexandrovich Nikitin

Samara State University of Social Sciences and Education

Author for correspondence.
Email: nikitin_nikolai@inbox.ru

postgraduate student of Chair of Biology, Ecology and Methods of Teaching

Russian Federation, Samara

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Supplementary files

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2. Figure 1 - Test site No. 10, within the boundaries of which a group growth of individuals was recorded

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3. Figure 2 - Test site No. 13, within which a uniform distribution of individuals is recorded

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Copyright (c) 2018 Nikitin N.A.

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