Horizontal Structure of Forest Stands and New Growth of Northern Taiga Virgin Blueberry-Sphagnum Spruce Forests in Cisurals

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UDС

630*182.22:630*187:582.475(470.13-924.82)

DOI:

10.17238/issn0536-1036.2018.6.78

Abstract

The article considers spatial structure of forest stands and new growth of two virgin spruce blueberry-sphagnum forests in a climax stage and spontaneously developing in different forest lands of the Northern Taiga subzone and foothills of the Ural Mountains (the Komi Republic). The results of comparative analysis of size, age and horizontal structure of the forest stands are presented. The degree of differentiation of the studied plant communities was shown in respect of variability of trees diameters at a height of 1.3 m and height of new growth with the use of descriptive statistics indicators. Large variability of trees diameters and new growth heights in the both spruce forests was emphasized. Type of age structure of the forest stands which confirms their absolute age difference is shown. Estimated data received by the means of spatial statistics and point process analysis of testing of null hypothesis of complete spatial randomness is represented. Random spatial structure was found in the case of trees collocation and in the case of separate trees location according their sizes and breeds. Weak aggregation of deciduous trees at distances less than 1 m is emphasized. New growth demonstrates group character of distribution. Accumulation of the new growth in phytocenosis, which includes fir, is the strongest. The similar type of horizontal structure distribution of trees and new growth is found in developed balanced climax communities of virgin forests.

Authors

A.V. Manov, Candidate of Agricultural Sciences
I.N. Kutyavin, Candidate of Agricultural Sciences

Affiliation

Institute of Biology of Komi Scientific Centre of the Ural Branch of the Russian Academy of Sciences, ul. Kommunisticheskaya, 28, Syktyvkar, Komi Republic, 167982, Russian Federation; e-mail: manov@ib.komisc.ru, kutjavin-ivan@rambler.ru

Keywords

horizontal structure, blueberry-sphagnum spruce forest, virgin forest, tree stand, new growth, Northern taiga, Cisurals

For citation

Manov A.V., Kutyavin I.N., Horizontal Structure of Forest Stands and New Growth of Northern Taiga Virgin Blueberry-Sphagnum Spruce Forests in Cisurals. Lesnoy Zhurnal [Forestry Journal], 2018, no. 6, pp. 78–88. DOI: 10.17238/issn0536-1036.2018.6.78

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Received on February 05, 2018