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    Wyświetlanie 1-5 z 5
    Tytuł:
    Analiza stanu zachowania najgrubszych dębów powiatu gryfińskiego
    Analysis of the state of conservation of the largest oaks in Gryfino County
    Autorzy:
    Jankowski, Krzysztof
    Klimowicz, Marta
    Powiązania:
    https://bibliotekanauki.pl/articles/50113557.pdf
    Data publikacji:
    2022-05-01
    Wydawca:
    Polskie Towarzystwo Dendrologiczne
    Tematy:
    Quercus
    oak tree
    natural monument
    Gryfino County
    Opis:
    Oaks have often been depicted in scientific and popular literature primarily for their size, as well as cultural and historical value. Such studies usually concerned the most impressive specimens on a national scale. However, often there is little data on the largest specimens on a local scale. The study carried out between 2020-2021 in Gryfino County was an attempt to fill this gap. The study was conducted on a group of trees that are thickest in terms of diameter at breast height. The analysis included a detailed description of dendrological parameters and an assessment of health according to the scales used in modern dendrology. Information from historical sources was also taken into account.
    Źródło:
    Rocznik Polskiego Towarzystwa Dendrologicznego; 2021, 69; 59-70
    2080-4164
    2300-8326
    Pojawia się w:
    Rocznik Polskiego Towarzystwa Dendrologicznego
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Oak (Quercus spp.) response to climate differs more among sites than among species in central Czech Republic
    Autorzy:
    Rybnicek, M.
    Cermak, P.
    Prokop, O.
    Zid, T.
    Trnka, M.
    Kolar, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/41078.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    oak
    Quercus
    plant response
    climatic parameter
    precipitation
    temperature
    tree ring
    Czech Republic
    Opis:
    Climatic parameters are the main environmental factors affecting tree growth. The main aim of the presented study was to determine whether different oak species growing under contrasting environmental conditions show different sensitivity to climatic parameters. Four oak stands with Quercus robur, Quercus petraea, Quercus polycarpa and Quercus dalechampii growing in the same area were evaluated. Standard dendrochronological methods were used for sample preparation, ring width measurements, cross-dating, chronology development, and the assessment of growth-climate response patterns. Although the species grew under different environmental conditions, their local tree-ring chronologies are highly correlated. The radial growth responses to climatic parameters differ slightly, but the response depends more on local site conditions than on the oak species. At the same time, the strongest correlations between radial growth and climatic parameters were identical among species and sites. The amount of water available in the soil was the main climate-dependent factor limiting radial growth. Approximately since the 1990s, the distribution of rainfalls within the growing season has changed at the expense of spring precipitation. The significance of relative soil moisture content during spring for oak growth increased and the significance of summer values decreased.
    Źródło:
    Dendrobiology; 2016, 75
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dynamika powstawania pęknięć i listew mrozowych na wybranych drzewach w parkach Poznania
    Autorzy:
    Dziurzyński, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1022019.pdf
    Data publikacji:
    2005
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    parki miejskie
    uszkodzenia drzew
    listwy mrozowe
    platan
    Platanus
    pekniecia mrozowe
    Poznan
    Quercus
    dab
    drzewa
    frost crack
    frost rib
    plane−tree
    oak
    Opis:
    Detailed measurements of the frost crack width were made in selected trees during two subsequent winter seasons. Also frost ribs were measured. Such individual approach to generally known phenomenon of frost cracks enables its better understanding.
    Źródło:
    Sylwan; 2005, 149, 06; 40-44
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Rola sójki (Garrulus glandarius) w inicjowaniu przemian sukcesyjnych zbiorowisk leśnych z udziałem dębu (Quercus sp.)
    Role of jay (Garrulus glandarius) in initializing successional changes in forest communities with the participation of oak (Quercus sp.)
    Autorzy:
    Olszewski, A.
    Brzeziecki, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/980357.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    zbiorowiska lesne
    sukcesja roslin
    dab
    Quercus
    zoochoria
    sojka
    Garrulus glandarius
    acorn
    jay
    oak
    ornitochory
    seed dispersal
    stand heterogeneity
    tree succession
    zoochory
    Opis:
    The ability of spatial expansion and conquering of new locations, suitable for growth, is one of the most important properties enabling different plant species (including forest trees) a permanent existence in a constantly changing (in space and in time) environment. In the course of evolution, plants developed several adaptations and mechanisms enabling them to capture new localities appropriate for life. The key role in this process is played by so called propagules, i.e. differently built spores, seeds and fruits. The main sources of forces and major transportation vectors for propagules are such mechanisms as: power of gravity (barochory), wind (anemochory), water (hydrochory), animals (zoochory) and man (antropochory). Among them, in case of tree species producing large seeds, containing bulky amounts of food resources, the most important role is played by zoochory. The special variant of zoochory is ornitochory, i.e. dispersion of plant propagules by birds. One of the best known and documented examples of ornitochory is dispersal of oak acorns by jays (Garrulus glandarius). The contemporary research shows that during a vegetation period one single bird is able to deposit even several thousends of acorns within the area of 10 to 100 ha. The dispersal distance in case of acorns distributed by jays is variable and depends on several factors, first of all, climatic conditions and degree of environmental heterogeneity. On average, acorns are distributed within a distance of several hundred meters from seed trees; sometimes they are disseminated at a distance of several (4−8, maximum 20) kilometers. As a rule, only a part of deposited acorns is uncovered and consumed by birds, thus at least some of them can germinate and produce new oak seedlings. It was also recently demonstrated that jays preferably put down acorns under the stand canopies composed by tree species other than oak, for instance, under Scots pine trees. Under favourable conditions, this initiates natural successional processes and leads to a significant conversion of tree stand composition. Considering a large scale and commonness of this phenomenon, it deserves an interest and attention, not in the case of natural forests only, but in the case of managed forests as well, in which the quasi−natural, successional processes, initiated by jays, can considerably contribute to a greater compositional and structural diversity of tree stands.
    Źródło:
    Sylwan; 2019, 163, 06; 479-88
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Określanie wieku starych dębów
    Estimation of the age of old oak trees
    Autorzy:
    Ufnalski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1013012.pdf
    Data publikacji:
    2008
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    wiek drzew
    okreslanie wieku
    srednie przyrosty roczne
    drzewa stare
    Quercus
    lesnictwo
    dab
    przyrosty roczne
    drzewa lesne
    quercus robur
    quercus petraea
    old oak trees
    tree age
    age estimation
    Opis:
    The age of old trees is often estimated only on the basis of trunk thickness. A more detailed method for estimation of the age of old oak trees is presented here, depending on species and environmental conditions. For oak trees growing singly or at forest edges, the mean annual ring width is over 2 mm, while in the forest interior ca. 1 mm for Quercus petraea, and 1.2−2.5 mm for Q. robur, depending on site fertility.
    Źródło:
    Sylwan; 2008, 152, 10; 36-40
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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