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 503
- Downloads 0
Density of Scots Pine Wood in Drained Sphagnum Pine Forest
The task of increasing forest productivity has been and remains one of the current interests of the European North of Russia, especially after the period of primary development of the forest areas. In the European Northe...
Improving Chemical Maintenance Techniques in Forest Plantations
This article covers concerns about the elimination of low-value deciduous trees by chemical treatment in favour of conifers. Various methods for removing undesirable vegetation are discussed with an indication of their a...
Mathematical Estimation of Information Reliability Regarding Forest Fires
The rapid development of digital technologies, especially methods for processing a large amount of information, offers vast opportunities for obtaining new algorithms for supporting management decisions, including the pr...
Photosynthetic Pigments in Silver Birch Leaves (Betula pendula Roth.) with Technogenic Load
The content of photosynthetic pigments in silver birch leaves (Betula pendula Roth.) is studied in areas with technogenic load and in baseline conditions. The research is performed in a forb type of birch forest in the s...
Ecological and Cenotic Activity of Species of the Middle Taiga Flora
The control of the main weeds of forestry objects has always played an important role in forestry. The development of evidence-based measures, primarily in the areas of forest nurseries, relies on identifying the feature...