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    Wyświetlanie 1-3 z 3
    Tytuł:
    Zbrodnia w Stefanowie : 75 lat temu
    Autorzy:
    Kaczorowski, Andrzej W. (1951- ).
    Powiązania:
    Biuletyn Informacyjny / Światowy Związek Żołnierzy Armii Krajowej. Zarząd Główny 2018, nr 2, s. 68-70
    Data publikacji:
    2018
    Tematy:
    II wojna światowa (1939-1945)
    Okupacja niemiecka Polski (1939-1945)
    Ludobójstwo niemieckie (1939-1945)
    Miejsca pamięci narodowej
    Artykuł z czasopisma kombatanckiego
    Opis:
    Fotografie.
    Dostawca treści:
    Bibliografia CBW
    Artykuł
    Tytuł:
    Śmiertelność fauny na szlakach turystycznych w zależności od ich szerokości i położenia
    Mortality of invertebrate fauna on hiking trails depends on their width and location
    Autorzy:
    Bajor, P.
    Trynkos, M.
    Skłodowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/985788.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    turystyka
    fauna epigeiczna
    bezkregowce
    smiertelnosc zwierzat
    smiertelnosc weekendowa
    turysci
    oddzialywanie na srodowisko
    okolice Warszawy
    Nadlesnictwo Chojnow
    lasy
    szlaki turystyczne
    outdoor recreation
    tourism
    forest
    a. stercorosus
    trial width
    weekend mortality
    Opis:
    The study tested the following hypotheses: the mortality of invertebrate fauna is higher (1) on wide trails than on narrow ones, (2) on sections near the entrance to the forest than on the parts located within the forest, and (3) during the weekend than during the workdays. To assess the mortality of epigeic fauna trampled on hiking trails, the most frequented trails in the Chojnów Forest District (central Poland) were selected. On each trail, 100 m long segments were designated near the boundary with open terrain (‘entrance' sections) and inside the forest, 500 m from the edge. Paths wide less than 1.5 m were considered as narrow, while those wider than 3 m as wide ones. Data was collected in 2016 and 2017 (8 and 7 inspections, respectively). A total of 752 trampled animals belonging to 25 species or taxa were found. GLM analysis did not reveal significant differences between the number specimens or species trampled on trails with different location or width. However there were more dead individuals and species on the entrance segments. Also, more dead specimens and species were found on wider paths, but the difference was not significant (fig. 1, tab.). The number of trampled invertebrates increased significantly during the weekend (fig. 2, tab.). NMDS clearly ordered the data from fauna collected at the entrance trails to those collected within the forest (fig. 3). 74.9% of the variation in species data was explained by the first PCA axis and 14.0% by the second one. The first axis was associated with the trail location (fig. 4). Points representing invertebrate fauna found on narrow paths (especially inside the forest stand) are located closer together than points representing fauna on wide trails (especially those bordering on open areas). The PCA correlated the most significant trampling of the dor beetle (A. stercorosus) with narrow trails within the stand and trampling of the spring dor beetle (T. vernalis) with wide paths near the entrance. The impact of hiking on the forest and all of its fauna is still little known. In order to effectively counteract its negative effects and protect organisms present on trails, research should be continued.
    Źródło:
    Sylwan; 2018, 162, 04; 325-332
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ sposobu zrywki i doświadczenia wykonawcy na wielkość uszkodzeń drzew na powierzchniach trzebieżowych Nadleśnictwa Chojnów
    Influence of skidding method and the contractors experience on the size of tree damage on the thinning areas in the Chojnow Forest District
    Autorzy:
    Maciak, A.
    Popczyński, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/980293.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewostany potrzebiezowe
    pozyskiwanie drewna
    zrywka drewna
    zrywka nasiebierna
    zrywka nasiebierna laczona z wleczona
    uszkodzenia drzew
    operatorzy maszyn lesnych
    doswiadczenie zawodowe
    Nadlesnictwo Chojnow
    thinning
    skidding
    forwarder
    tractor ground skidding
    damage to trees
    Opis:
    Skidding includes timber transport from the place of its harvest to the place of its storage, loading or pre−treatment. This process in the thinned stands can result in serious damage to the remaining trees. The purpose of the described research was to characterize and compare the size and location of damage in the thinned stands after forwarder skidding with the damages resulting from the combined forwarder and tractor ground skidding. These tests also aimed at determining whether the contractor’s experience affects the level of damage. The research was carried out on four study plots located in the Chojnów Forest District (C Poland). Although the works on each plot were performed by different contractor, they had equipment of comparable technical and overall parameters.The height of the damage, the distance of the damaged tree from the skidding trail and the size of the damage were measured. Damage was classified according to the degree of the tissue damage. The most serious damage occurs at a distance of up to 1 m from the skidding trail and at a height of up to 1 m. The most severe damage was over 1/8 of the trunk perimeter. No significant dependence of the size and location of damages on the skidding method was found.The highest fraction of the damaged trees was recorded on the area in the Młochów Forest Range (5.17%) where only the forwarder skidding took place. In the Sierzechów Forest Range (the same method of skidding, but almost twice as dense stand), there was significantly less damage (0.62%). In this case, the share of the damaged trees was the smallest, despite the highest number of trees. The reason for this may be the impact of the human factor on the amount of damage as the most experienced contractor worked on that study plot.
    Źródło:
    Sylwan; 2019, 163, 01; 25-34
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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