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The paper describes changes, which took place over the last 30 years in old−growth forest stands occupying two permanent research plots, established in the Kaliszki and Sieraków strict protection areas in the Kampinos National Park (central Poland). Both plots have a form of ecological transects. The Kaliszki plot is 20 m wide and 700 m long (1.40 ha), while the Sieraków plot (total area of 2.56 ha)...
In the last decades, we observed significant changes in the tree species composition in all layers of close−to−natural stands. Since the 1970s, the Forest Research Institute has collected and stored dataset from stand measurements, phytosociological and other research that are the basis for the long−term monitoring of vegetation. The aim of the research was to determine the directions of changes in...
The aim of the study was to assess the changes occurring in the forests of the Kłodzko Region in the recent period (2001−2017), with particular emphasis on the species composition of the stands, their share in age classes and the structure of harvested timber, including live trees, deadwood, wind−broken and wind−fallen trees. The Kłodzko Region located in the Sudety Mountains (SW Poland) covers the...
In Polish forest management planning, the species composition of stands in a forest district is established by adding up the volumes of tree species from individual forest stands. These volumes are calculated according to the estimated share of species cover and the estimated volume of the entire forest stand. The species structure of stands in a forest district, established on the basis of such a...
Vertical distribution of species richness of various groups of organisms within trees is still insufficiently understood. The reason for this are, among others, the difficulties in accessing standing trees. The aim of the study was to determine the differentiation of species richness of fungi, lichens and lichenicolous fungi and bryophyte of three tree species (oak, birch and pine) within windthrow...
The paper describes current (in years 2007−2017) changes of basic parameters of forest stands that constitute the managed part of Białowieża Forest (ca. 53,000 ha), divided into three forest districts: Białowieża (12,600 ha), Hajnówka (19,700 ha) and Browsk (20,400 ha). The investigated tree stands represent different phases of ecological succession, modified by silvicultural treatments and other...
The aim of the study was to analyse (on the basis of the data from the State Forests Information System) the changes occurring in the Bieszczady forests in the period of 2007−2016. One of the processes taking place in the study area is the withdrawal of grey alder stands and the appearance of natural regeneration of mainly beech and fir, and in a smaller proportion spruce (fig. 1). Another natural...
The paper presents the assumptions of the portfolio theory and the possibilities of its application in the forestry to diversify the species composition of the stand. The decision problem concerns the rationalization of the species share, ensuring the optimal ratio of annual production value from 1 ha in the stand (financial effect) to the expected level of risk. The adopted measure of the assessment...
The objective of this work was to evaluate the occurrence of two strictly protected vascular plant species in managed stands of submontane acidophilous oak forests (Luzulo luzuloidis – Quercetum petraeae Hilitzer 1932 association) in the Sudeten foothills (Lower Silesia, Poland). During the study, the most important stand parameters influencing the occurrence of the wild service tree (Sorbus torminalis...
The review focuses on use of airborne hyperspectral imagery in forest species classification. Studies mentioned in the review concern hyperspectral image classification with use of various methods. Only research, where study area is located in Europe or North America were selected. Articles were reviewed with respect to used pre−processing methods, methods of feature selection or feature extraction,...
Forest gaps, openings in the canopy caused by death of one or more trees, are the dominant form of natural disturbance in the temperate forests. Gaps play a critical role in driving stand dynamics and influencing forest growth cycle. They increase habitat diversity, structural complexity, fauna and flora species diversity. The size of a gap may strongly influence tree species regeneration composition,...
The aim of the study was to analyse the changes in abundance and species composition of dung beetles (coprophagous Scarabaeoidea) inhabiting Scots pine stands in various stage of the development. Beetles were collected in baited traps in Człuchów Forest, Pomeranian Lake District (NW Paland). In total we collected 87,596 specimens representing 41 species (tab. 2). The structure of dung beetle communities...
The aim of this research was to determine the composition of microscopic fungi colonizing Norway spruce dead wood depending on the degree of decomposition of wood and the location in the Tatra National Park (TPN; southern Poland). The work included lying and standing dead wood of Norway spruce as well as tree stumps. The sampling plots were located in the Białka Valley (eastern part of the TPN) where...
Badania miały na celu określenie wpływu wybranych cech środowiska na skład gatunkowy oraz niektóre cechy osobnicze owadów kambio- i ksylofagicznych zasiedlających pniaki sosnowe na terenie Nadleśnictwa Zwierzyniec. Prace terenowe przeprowadzono w okresie od 15 lipca do 3 września 2014 roku. Badania przeprowadzono w dwóch wydzieleniach na 29 powierzchniach i 66 pniakach. Łącznie w wyniku badań zebrano...
The studies initiated by Włoczewski in 1936 revealed changes in the species composition of forest stands in the Białowieża National Park. This led to the question about what these changes would be in the future. The aim of our study was to predict changes in the volume of tree species in the so called Strict Reserve in the Białowieża National Park over the period of 40 years. A size−class growth model...
The study presents a method of planning species composition of forest stands in mountain areas on the example of Beskid Niski Mts. (south−eastern Poland). The focus was on the species composition of forest stands growing in different conditions, taking into account the type of forest habitat and terrain characteristics: altitude, exposition and slope. The research was based on data stored in the Information...
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