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The research investigates if and to what extent the current state of the sprinkled surface and the temperature of the water used can influence the level of interception. The analysis was based on a series of experiments undertaken in laboratory conditions. Photographic documentation has recorded the angle at which water droplets at different temperatures hit the surface of leaves and needles of beech,...
When using such methods as terrestrial laser scanning (TLS), one of the major factors influencing the accuracy of stand characteristics determination is the visibility of trees on a sample plot, which is often obscured by the shadow effect caused by trees located closer to the plot center. Because of this, the percentage of the identified trees and basal area depends on the distance from the plot...
The research analyses the use of space by the Wild boar living in a human−transformed landscape. CMR method was used. Animals were caught in two complexes from February 2009 to May 2010. Fifty boars were captured. Information on the location and hunting time were collected. Results show small range of activity of investigated Wild boars. Animals were shot within 4 km from the trapping place. The longest...
Clear−cutting impacts site conditions seriously. However, in nutrient−poor sites the effects of stand removal can be minor than in nutrient−rich sites. The aim of this work was to assess whether the clear−cut can improve species diversity of ground Cladonia species, which decline has been observed in forest communities. In stands of different age classes (10, 11−20, 21−40, 41−60, 61−80, 81 years)...
This study was carried out in north−eastern Poland in 20 Scots pine stands with well−developed lower layer of pedunculate oak. In each stand, 5 highest oak trees were selected. Basing on the stem analysis, a growth model for oak undergrowth in Scots pine stands was elaborated. It can be used for determination the height growth rate in relation to the age and height of oak. Obtained model was compared...
The paper presents an analysis of abundance of the millipedes (Diplopoda) in the Białowieża Forest (eastern Poland) regarding habitat moisture and fertility. Mean individual biomass depends mostly on habitat fertility achieving higher values on eutrophic and moist sites. PCA and RDA confirmed observed pattern of relationship between millipedes abundance and site conditions.
The paper studies tree damage after late thinning operation in lowland spruce stands. The research was done in the 4th age class stands, where three different methods of timber harvesting were applied: full tree system (FTS), long wood system (LWS), short wood system (SWS). The lowest level of damage was observed in SWS.
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