Changes in Density and Species Composition of Undergrowth at Different Distances from the Forest Edges in Postagrogenic Areas
Journal Title: Lesnoy Zhurnal (Russian Forestry Journal) - Year 2020, Vol 11, Issue 1
Abstract
The work is devoted to the study of changes in density and species diversity of undergrowth at different distances from the forest edges on postagrogenic lands, as well as factors affecting the distribution of undergrowth by area. The studies were done in the middle subzone of taiga in the Velsk district of Arkhangelsk region. Undergrowth was studied on tapes laid out parallel to the forest edges and at different distances from them with 10-meter intervals. Enumerations were carried out by breed, height class and living state. The type of use, the period of non-use as intended, the degree of grassing down and the particle-size composition of soil were determined for all postagrogenic areas. The most important deriver affecting the process of overgrowth and range of propagation of undergrowth is the period of non-use of this area for the intended purpose (correlation coefficient is 0.94) and the degree of grassing down (correlation coefficient is 0.54). The more time has passed since the termination of agricultural activity, the higher the quantity of undergrowth and the further it spreads from the forest edges. At 10 years of non-use, the undergrowth occurs up to a distance of 50 m, and already at 20–25 years it appears at a distance of 90 m from the forest edge. The range of propagation of undergrowth from the forest edge is not affected by such characteristics of the field as the type of use and the particle-size composition of soil. The total density of undergrowth decreases at a distance from the forest edge from 10,000 (0–30 m) to 1,600 (80–90 m) pcs/ha. These figures for the economically valuable species, such as spruce and pine, are from 7,533 (10 m from the forest edge) to 800 (90 m from the forest edge) pcs/ha and from 2,533 to 400 pcs/ha, respectively. The species spectrum of undergrowth corresponds to the woody vegetation composition within the forest edges adjacent to the fields and includes pine, spruce, birch, alder, and aspen. Aspen disappears from the species composition with a distance of 30 m from the forest edge. The species ratio in the undergrowth composition varies, however the dominant species are spruce and pine at different distances from the forest edges.
Authors and Affiliations
P. A. Feklistov, M. V. Averina, I. N. Bolotov, B. Yu. Filippov, D. N. Klevtsov
Keywords
Related Articles
- EP ID EP683250
- DOI 10.37482/0536-1036-2020-1-88-98
- Views 507
- Downloads 0
Determination of the Initial Stiffness of Unstretched Rolled Strip Saws
The paper presents the results of studies of the initial stiffness of rolled strip unstretched saws; theoretically obtained and experimentally confirmed. A mathematical model, that allows calculating the initial stiffnes...
Zonality of Forest Fuels and Their Pyrogenic Transformation in Pine Forests of Central Siberia
Fires in the forests of Siberia occur annually and cause enormous damage to natural resources. Therefore, studies of the natural forest fire hazard, one of the components of which are forest fuels, are relevant. The rese...
Differentiation of Dust Holding Capacity of Poplar Crowns
One of the key parameters of comfort and compliance with sanitary standards for cities is dustiness of atmosphere. Plantings of representatives of the poplar genus (Populus L.) become a reliable means of optimizing this...
Range Expansion of Cotoneaster lucidus Schlecht. in Forest Parks of Yekaterinburg
Shiny cotoneaster (Cotoneaster lucidus Schlecht.) is one of the oldest plants. It originated in Southeast Asia and has many primitive traits. Its survival strategy is fascinating. Its introduction range extends throughou...
Reserves and Structure of Phytomass in Northern Taiga Pine Forest Stands in the Komi Republic
The research aims at estimating phytomass reserves of northern taiga green-moss and sphagnum pine forests growing in the Komi Republic. The study was carried out in pine forests at the Zelenoborsk forest research station...