Tekstura karpackiego dolnoreglowego drzewostanu mieszanego o charakterze pierwotnym
| Autor: | Kołodziej, Zbigniew, Paluch, Jarosław, Bartkowicz, Leszek, Pach, Maciej |
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| Jazyk: | polština |
| Rok vydání: | 2015 |
| Předmět: | |
| DOI: | 10.26202/sylwan.2014135 |
| Popis: | The aim of this study was to characterize the texture of a primeval forest composed of Fagus sylvatica (L.), Abies alba (Mill.) and Picea abies ((L.) H. Karst). Empirical data were collected in the Babia Góra National Park (southern Poland) in the stand being under strict protection since 1934. 259 circular plots with a radius of 7.0 m and an area of 154 m each were established in nodes of 20×20 m grid. For individual plots and blocks of the combined plots representing gradient of spatial scales between 0.015 and 0.640 ha, the number of trees, diameter at breast height (dbh) distributions, basal areas and the values of structural diversity indices of Gini (GI), Shannon (SH) and Staudhammer−LeMay (STVI) were determined. The indices were also calculated for several types of theoretical distributions. Based on the values obtained for the theoretical distributions, the individual plots and the blocks of the combined plots were classified as representing simple (GI0.30;STVI0.10), moderately diversified (0.30GI0.45 and 0.10STVI0.30) or complex (GI0.45; STVI0.30) dbh structure. For all the spatial scales analyzed the average values of GI and STVI indices reached the level typical for populations of a high structural diversity (i.e. exceeded the values of 0.45 and 0.30 respectively). According to the GI and STVI values, the portion of stand patches with complex dbh structure ranged from 70.9% and 68.2% at the individual plots scale, respectively, up to 100% in the blocks of 16 plots (4×4). In general, in all the spatial scales analyzed the spatial diversification of the dbh distributions and basal area levels was higher than in managed selection forests and much higher than in managed single−storied stands. The dominant frequency of highly diversified dbh distributions found in the analysed stand was not concordant with the predictions of the forest dynamics theory based on developmental stages, according to which in primeval forests with a significant partition of emAbies alba/em and emPicea abies/em should prevail stand patches of rather simple dbh structure, characteristic for the long−lasting optimum stage. Sylwan 159 (7): 600-609 |
| Databáze: | OpenAIRE |
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