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 625
- Downloads 0
Improving the Performance of Band Saws by Local Thermophysical Effects on the Blade
The performance of a band saw is largely determined by stability and durability â the ability to maintain operational properties for a long time under the influence of external and internal factors until the onset of a...
Aboveground Stand Phytomass in Experimental Cultures of Lodgepole Pine in Syktyvkar Forestry of the Komi Republic
The purpose of this work is to evaluate and comparatively analyze the above ground phytomass of lodgepole pine (Pinus contorta Dougl.) and Scots pine (Pinus sylvestris L.) in experimental cultures. The results of studies...
Long-Term Growth Trends Analysis of Norway Spruce Stands in Relation to Possible Climate Change: Case Study of Leningrad Region
The Lisino training and experimental forest of the Saint-Petersburg State Forest Technical University was chosen as a study area. The forest is located in the central part of the Leningrad region and has a high level of...
Variability in Traits of Gmelin Larch Generative Organs in Eastern Transbaikalia
Forest vegetation in Zabaykalsky Krai covers 86.6 % of the total area. The dominant forest species is Gmelin larch (Larix gmelinii (Rupr.) Rupr.), which occupies about 57 % of the forest lands. The area of forests and th...
Age Dynamics of Gray Alder Biomass in the Stands of the Arkhangelsk Region
The assessment of forest productivity in forestry and forest ecology has a long tradition, but in recent decades there has been a paradigm shift: the target function of forestry, consisting in wood cultivation, has shift...