MORPHOLOGICAL AND ANATOMICAL PECULIARITIES OF THE SCOTS PINE ANNUAL RINGS IN MOSS-COVERED AND LEDUM TYPES OF FORESTS
DOI:
https://doi.org/10.31861/biosystems2021.01.093Ключові слова:
forest type, Scots pine, microanatomical structure, tracheids, principal component analysis, discriminant analysis of projections onto latent structuresАнотація
In the introduction, it is emphasised that any plant is an indicator of the environmental conditions of its site, and it is true for every cell of a plant. The purpose of this work is to assess the possibility of differentiation of moss-covered (Pinetum polytrichosum) and ledum pine forests (Pinetum ledosum) which are characterised by quite similar site conditions on the basis of a comparative analysis of quantitative characteristics of morphological and anatomical structures of annual rings. In the main part of the article, general tendencies of the wood-ring chronology are analysed; as a result, it is determined that perennial and yearly variations for these types of forests are quite similar, which makes it impossible to differentiate between them only on the basis of a tree-ring analysis. A complex assessment of variations of individual dimensional parameters of early and late tracheids sensitive to ecological gradient impact, including the use of intentionally selected chemometric analysis algorithms, has been performed. On the basis of a discriminant analysis of projections on latent structures, an algorithm for automatic identification of a forest type has been presented, which makes it possible to receive maximum diagnostic and identification information, as well as key parameters sufficient for a classification procedure have been determined. Thus, the most substantial contribution to the differentiation between moss-covered and ledum pine forests is made by the cell wall area and late tracheid cavity area, as well as the late tracheid cell wall thickness. The
classification model obtained has shown high predictive capacity; classification total mean accuracy has reached 97.48%. In the conclusion, it is stated that the established correlation between individual morphological and anatomical structures and site conditions makes it possible to use them as individualising factors when performing forensic examinations.
Посилання
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