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    Tytuł:
    Położenie średnich drzew próbnych w strukturze drzewostanu
    Raspolozhenie srednikh model'nykh derev'ev v strukture nasazhdenija
    Situation of mean sample trees in the structure of stand
    Autorzy:
    Guminski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/811234.pdf
    Data publikacji:
    1971
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewostany
    przyrost miazszosci
    struktura drzewostanu
    struktura grubosci
    struktura miazszosci
    struktura przyrostowa
    drzewa probne
    polozenie drzew
    Źródło:
    Sylwan; 1971, 115, 02
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sklad gatunkowy, budowa i struktura oraz kierunki przemian drzewostanu z udzialem swierka w przygrzbietowej czesci rezerwatu Madohora w Beskidzie Malym
    Revisiting a hilltop spruce stand in the Madohora Reserve in Beskid Maly reveals major changes in species composition, structure and succession after 50 years
    Autorzy:
    Karczmarski, J.
    Bak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/45350.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    lesnictwo
    Beskid Maly
    rezerwat Madohora
    drzewostany swierkowe
    sklad gatunkowy
    miazszosc drzew
    zasobnosc drzewostanu
    struktura grubosci
    struktura drzewostanu
    zywotnosc drzew
    odnowienia lasu
    dynamika drzewostanu
    Źródło:
    Leśne Prace Badawcze; 2010, 71, 4; 369-380
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Struktura drzewostanu w rezerwacie cisowym "Zdroje" w Szczecinie
    Stand structure in the 'Zdroje' common yew nature reserve in Szczecin
    Autorzy:
    Friedrich, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1013127.pdf
    Data publikacji:
    2008
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    Taxus baccata
    struktura populacji
    populacje roslin
    rezerwaty przyrody
    wysokosc drzew
    struktura grubosci
    grubosc
    struktura wysokosci
    lesnictwo
    cis
    struktura drzewostanu
    rezerwat Zdroje
    stand structure
    diameter distribution
    height distribution
    common yew
    nature protection
    Opis:
    The paper presents the stand structure in the "Zdroje" common yew nature reserve in Szczecin. In 2006 the stand was built by 1848 trees that belonged to 14 species. Scots pine was the most numerous species (1067 trees). There were also 533 common yews. The other species were represented by 1−76 specimens. The diameter structure of six the most important species as well as the height structure of a common yew were analysed. Changes in the height structure of a common yew over 28 years were presented as well. No natural regeneration of common yew was observed.
    Źródło:
    Sylwan; 2008, 152, 08; 25-34
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Struktura populacji i kondycja zdrowotna cisa pospolitego w rezerwacie "Cisy nad Liswartą"
    Population structure and health conditions of European yew in 'Cisy nad Liswarta' reserve
    Autorzy:
    Hylla, W.
    Dobrowolska, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/989692.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    rezerwaty przyrody
    rezerwat Cisy nad Liswarta
    drzewa lesne
    cis pospolity
    Taxus baccata
    struktura populacji
    struktura grubosci
    struktura wysokosci
    zdrowotnosc drzew
    odnowienia naturalne
    taxus baccata
    vitality
    diameter and height structure
    natural regeneration
    Opis:
    The aim of the study was to recognise the structure (sex, height, diameter) and vitality of European yew (Taxus baccata L.) population in the ‘Cisy nad Liswartą' reserve (50°46'27,12"N 18°47'11,86"E). The field investigations were performed in years 2005−2009. We measured diameter at breast height, diameter at root collar and height of all yews in the reserve. Sex of the individuals was determined as well as their health condition was classified into one of five classes. Total number of life and dead yew specimens (with height over 0,5 m) accounted to 466. Majority of the population grew in dense stands (stand density index 0.5−0.7). Sex was described for 55% of the population. Number of female individuals was 142 (30%) and male 116 (25%). Lack of or small crown transparency was found for 30% of life yew trees. The share of high transparency crowns equalled 11%. Damage caused by the game (especially deer) was older than 10 years and found for 42% life trees. Seedlings occurred under the canopy of 47 mature trees (10% of population). 15 relevés were established in the investigated stands. Natural regeneration of yew was found on 11 of them. 5 characterised with small number of yew seedlings. The greatest number of seedlings equalled 200 individuals. It was found that the number of yews higher than 0.5 m decreased in comparison to the previous surveys. Female and male yew trees occurred in the reserve, so the generative breeding is possible. Health condition of the analysed yew population is moderate. Problems with survival of the seedlings was observed. The special treatments should be recommended – cutting of some competitors to give more light for natural regeneration and fencing the greater number of yew seedlings.
    Źródło:
    Sylwan; 2015, 159, 01; 62-70
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zmiany górnoreglowego drzewostanu świerkowego w Tatrzańskim Parku Narodowym w latach 1973?2002
    Changes of a subalpine spruce forest in the Tatra National Park in 1973-2002
    Autorzy:
    Holeksa, J.
    Krawczyk, B.
    Skawiński, P.
    Wesołowska, M.
    Wika, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1015805.pdf
    Data publikacji:
    2007
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    Tatrzanski Park Narodowy
    miazszosc drzewostanow
    zmiany struktury drzewostanu
    drzewostany swierkowe
    zageszczenie
    struktura grubosci
    regiel gorny
    parki narodowe
    lesnictwo
    struktura drzewostanu
    zamieranie drzew
    plagiothecio−piceetum
    stand structure
    volume
    equilibrium
    Opis:
    The paper presents nearly 30−year changes in the structure of a 160 ha subalpine spruce stand in the Tatra National Park that has been subjected to strict protection during last 50 years. In 1973 a regular network of 65 small 0.05 ha circular plots was established over the whole area. In 2002 diameter and height of trees were remeasured in 61 plots. Similar changes were recorded nearly in the whole forest area. The density of trees decreased and the stand volume increased considerably on most plots. At the same time the variability among plots in trees' number and volume decreased and in 2002 the stand became more homogenous in terms of both characteristics. The obtained results were compared to the suggestion of Korpeľ that subalpine spruce stands reach the equilibrium between decay and growth processes on the area of 70 ha. The investigated forest was far from such equilibrium in spite of its area being more than two times bigger than that suggested by Korpeľ.
    Źródło:
    Sylwan; 2007, 151, 09; 29-40
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wzrost jodły rosnącej w rzędach i grupach w 10 lat po uprzątnięciu osłaniającego ją przebudowywanego negatywnego starodrzewu sosnowego
    Growth of silver fir planted in rows and groups 10 years after the removal of a poor-quality old-growth pine stand under reconstruction
    Autorzy:
    Jaszczak, R.
    Małys, L.
    Turski, M.
    Nicałek, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/991493.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewostany sosnowe
    drzewostany negatywne
    przebudowa drzewostanow
    drzewa lesne
    rzedy
    biogrupy
    jodla pospolita
    Abies alba
    wzrost roslin
    liczba drzew
    struktura grubosci
    struktura wysokosci
    struktura biologiczna
    stand conversion
    abies alba
    rows
    groups
    structure
    Opis:
    The paper presents the results of the second inventory following the removal of a poor−quality old−growth pine stand relating to the biosocial structure, breast height diameter and height of fir trees planted in two experimental variants (rows and groups) that already have reached 50 years of age.
    Źródło:
    Sylwan; 2013, 157, 07; 533-538
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Charakterystyka biometryczna kęp dębu szypułkowego (Quercus robur L.) i jodły pospolitej (Abies alba Mill.) wyrosłych w warunkach rębni zupełnej, częściowej i zupełnej gniazdowej
    Biometric characterisation of tree clumps of pedunculate oak (Quercus robur L.) and silver fir (Abies alba mill.) grown in conditions of clear cutting, shelterwood cutting and group clear cutting
    Autorzy:
    Magnuski, K.
    Jaszczak, R.
    Małys, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/973045.pdf
    Data publikacji:
    2003
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    Quercus robur
    struktura biologiczna
    cechy biometryczne
    Abies alba
    struktura grubosci
    stuktura wysokości
    leśnictwo
    rębnie zupełne gniazdowe
    dąb szypułkowy
    rębnie częściowe
    rębnie zupełne
    kępy drzew
    urządzanie lasu
    drzewa leśne
    jodła
    oak
    fir
    growth traits
    clear cutting
    shelterwood cutting
    group clear cutting
    Opis:
    The article presents results of assessment of growth parameters of oak and fir trees developed on surfaces on which, earlier, the following three types of felling were carried our simultaneously: clear cutting (1−Rz), shelterwood cutting (2−Rcz) and group clear cutting (3−Rg) applied 35 years ago to reconstruct a hornbeam−oak tree stand. This is a successive stage of research showing which of the applied types of felling created sufficiently favourable permanent conditions, which are reflected at this stage of growth of the above−mentioned tree species.
    Źródło:
    Sylwan; 2003, 147, 11; 3-11
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modele struktury grubości w jednopiętrowych drzewostanach z udziałem jodły Abies alba Mill. i buka Fagus sylvatica L.
    Models of diameter structure in single-storied stands with fir Abies alba Mill.and beech Fagus sylvatica L.
    Autorzy:
    Podlaski, R.
    Pach, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/989766.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewostany mieszane
    drzewostany jednopietrowe
    struktura grubosci
    jodla pospolita
    Abies alba
    buk zwyczajny
    Fagus sylvatica
    piersnice drzew
    rozklad piersnic
    rozklad Weibulla
    forest patches
    structural heterogeneity
    tree diameter distribution
    weibull distribution
    Opis:
    The objectives of the study were (1) to determine the models of diameter at breast height (dbh) distributions in single−storied mixed stands with fir Abies alba Mill. and beech Fagus sylvatica L. as well as (2) to assess the usefulness of Weibull distribution to approximation of empirical dbh distributions for distinguished models. In the Carpathians (southern Poland) and in the Świętokrzyskie Mountains (central Poland) 36 sample plots ranging in size from 0.1 to 0.4 ha were established. To identify the dbh distribution models in single−storied stands with similar empirical dbh distributions, the hierarchical cluster analysis (HCA) with the Jaccard's measure and the Ward's minimum variance agglomeration method was used. To approximate dbh distributions, the Weibull distribution was employed. Single−storied mixed stands with fir and beech, with the mean age between 50 and 70 years at the dbh, were characterised by a large diversity of dbh distributions. Three groups of stands (I, II, III) differing, among others, in average dbh were determined (fig. 1). In these groups the average dbh ranged from 23.5 to 32.6 cm, from 18.9 to 25.1 cm, and from 13.7 cm to 19.6 cm, respectively. Within these groups, seven models of unimodal distributions were selected (figs. 2−4; tab.). The models are characterised by varying degrees of asymmetry with the highest number of trees from less than 30/ha to more than 300/ha which occurred mainly in the dbh classes between 9 and 33 cm (models AS1, SM1, AS2, AS3, AS4, AS5, SM2). The results of χ² test indicate the high flexibility and suitability of Weibull distribution for modelling of such types of dbh structures.
    Źródło:
    Sylwan; 2015, 159, 07; 586-592
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ocena przydatności wybranych funkcji do modelowania rozkładu pierśnic w drzewostanach olszy czarnej (Alnus glutinosa (L.) Gaertn.)
    Evaluation of usefulness of selected functions for modeling distribution of breast height diameter in black alder stands (Alnus glutinosa (L.) Gaertn.)
    Autorzy:
    Orzeł, S.
    Pogoda, P.
    Ochał, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/988989.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewostany olszowe
    struktura grubosci
    olsza czarna
    Alnus glutinosa
    piersnice drzew
    rozklad piersnic
    rozklad teoretyczny
    aproksymacja
    modelowanie
    funkcja gestosci prawdopodobienstwa
    test Kolmogorowa-Smirnowa
    diameter at breast height
    diameter distribution
    probability density function
    kolmogorov−smirnov test
    Opis:
    We evaluated the usefulness of ten theoretical probability density functions for the approximation of the breast height diameter distributions in managed alder stands growing in the western part of the Sandomierz Basin (southern Poland). The study material consisted of measurement results for 22,530 alders obtained for 844 circular sample plots, established in 163 stands aged 6−89. In the area of particular stands, from 2 to 10 age−dependent circular sample plots sized 0.01−0.10 ha were systematically arranged. We evaluated the following theoretical probability distributions: normal (N), double normal (P−N), Johnson SB (J), Weibull (W), beta (B), Burr (Bu), gamma (G), log−normal (L−N), log−logistic (L−L) and Birnbaum−Saunders (B−S). Additionally the usefulness of the W, B, Bu, G, L−N, L−L and B−S distributions with omitted location parameter was tested. The goodness−of−fit of each probability density function was assessed based on the Kolmogorov−Smirnov statistic, the root mean square error and ranks established on their basis. It was found that DBH distribution of majority stands is characterized by right−sided asymmetry and negative kurtosis. It was showed that the best distribution for the breast height diameter structure approximation of alder stands is the Johnson SB (J) distribution. To describe the frequency of thickness, normal (N) and log−logistic (L−L) distribution should not be used. Elimination of location parameter significantly affects usefulness of probability density functions to modeling empirical distributions of breast height diameter. Gamma and Burr distributions with omitted location parameter gave the best results in description the frequency of breast height diameter. In certain situations, these distributions can also be used to describe the structure of breast height diameter of alder stands.
    Źródło:
    Sylwan; 2017, 161, 02; 101-113
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ masowego zamierania świerka w drzewostanach Białowieskiego Parku Narodowego na odnowienie naturalne dębu
    Influence of spruce decline in stands of the Bialowieza National Park on natural oak regeneration
    Autorzy:
    Bobiec, A.
    Bobiec, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1007250.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    Bialowieski Park Narodowy
    siedlisko boru mieszanego swiezego
    siedlisko lasu mieszanego swiezego
    powierzchnie badawcze
    drzewostany swierkowe
    dynamika drzewostanu
    swierk pospolity
    Picea abies
    zamieranie drzew
    dab
    Quercus
    struktura grubosci
    odnowienia naturalne
    podrost
    diameter structure
    disturbances
    ground fires
    regeneration wave
    stand decline
    Opis:
    The study aimed at analyzing the oak population structure was performed on the 29−hectare plot representing stands dominated by spruce in the strict reserve of the Białowieża National Park. It revealed that oaks represent two distinct cohorts: the old, emerged in the late 1800s, and the new that is being established in the area subject to mass decline of spruce. We suggest that the first regeneration wave was the result of ceasing the frequent ground fire regime that prevented the regeneration of trees except for pine. The current wave has been prompted by a set of changes in the habitat quality, following the breakdown of dense spruce−dominated stands. These changes, such as access to sunlight, accelerated decomposition of spruce litter, local exposure of mineral soil, and protective structures of lying spruce logs, provide regeneration advantage to oak and other intolerant species.
    Źródło:
    Sylwan; 2012, 156, 04; 243-251
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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