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Parasites are the most common cause of disease in European roe deer (Capreolus capreolus), but prevalence of some invasions was smaller after a dry and hot summer. In the years 2015−2016, which were distinguished by exceptionally high temperature during summer months, the presence of nematodes and protozoa was assessed in the digestive tract of roe deer in western Poland. Studies confirmed that weather...
The qualitative and quantitative descriptive models of tree architecture differ in the degree of complexity and the way of mapping tree structure, and thus, are of varied use in forestry. The qualitative, Hallé−Oldeman models, serve as a framework for analyzing tree architecture and help define the different components of a tree branching system. Among the quantitative models (here: horizontal, three−dimensional...
Bilberry, the most commonly collected fruit of Polish forests, has not only culinary values, but also proven therapeutic and preventive effects. It is a valuable forest raw material for herbal, pharmaceutical and food companies producing dietary supplements and drugs. The range of applications for bilberry is very wide, and the most important feature of this raw material is the high antioxidant potential...
The aim of the study was to determine the influence of stand density index on the tree−ring width, latewood proportion and wood density for Norway spruce. Study sites were located as follows: 12 within the north−eastern species range in Poland, 7 in the south−western range, in the Sudety Mts., and 9 in the Carpathians (southern range). Clustering stands according to their stand density index, 10 data...
The paper analyzes the spatial and temporal diversity of afforestation of non−forest land, with particular emphasis on land not being the property of the State Treasury, before joining the European Union and as part of subsequent stages of the Rural Development Program. Data from the databases of the Statistics Poland and from the Agency for Restructuring and Modernisation of Agriculture was used...
The paper presents the standardization of felling and production of assortments costs by the method of grouping forest districts with similar natural conditions. The standard costs were compared with the incurred (actual) and planned costs, and the method of determining the standard unit costs of felling and production of assortments was assessed in terms of its use in the State Forests National Forest...
The aim of the study was to assess the trophism of soils in the strict nature protection area using the soil trophic index (SIG). The ‘Rybitew’ strict protection area (224.2 ha, created in 1965), is located in the north−eastern part of the Kampinos National Park (central Poland). The results of field and laboratory studies of the physicochemical and chemical properties of soils made it possible to...
Ecological indicator values (EIV) are a commonly used tool for assessing habitat conditions in various ecosystems. They are relatively rarely used for the analysis of epiphytic communities, which results from objective difficulties in the study of this group of organisms in full height gradient on settled trees. Windthrows provide a rare opportunity to fully analyse the biota diversity of epiphytic...
The aim of the study was to compare the content of some chemical substances in a bark of about 3−year−old fast−growing poplars Populus deltoides × maximowiczii and Populus trichocarpa with literature data on the chemical composition of a bark of older deciduous trees. The Populus deltoides × maximowiczii and Populus trichocarpa material were obtained from the Wolica experimental field belonging to...
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