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    Wyświetlanie 1-6 z 6
    Tytuł:
    O Baublisie raz jeszcze...
    About Baublis once again...
    Autorzy:
    Tomusiak, R.
    Zarzyński, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1009653.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    pomniki przyrody
    dab Baublis
    historia
    Litwa
    lesnictwo
    drzewa lesne
    'baublis'
    common oak
    monumental tree
    lithuania
    Opis:
    This paper is a kind of addition to four other articles about famous Lithuanian oak−tree called 'Baublis' published in Sylwan, especially those from 1827 and 2002. The first one, written by Dionizy Paszkiewicz was a description of its cut down in 1812. The latter was a scientific estimation of 'Baublis'es' main parameters (trunk circumference, height, volume, age, etc.) basing on facts from the previous article. However, some new data about this tree were found basing on the parameters of unique building made from its trunk that had survived on Lithuania since the beginning of 1880s. The new estimations of this famous oak−tree size are presented.
    Źródło:
    Sylwan; 2009, 153, 12; 847-851
    0039-7660
    Pojawia się w:
    Sylwan
    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
    Tytuł:
    Standardy dendrochronologiczne sosny zwyczajnej (Pinus sylvestris L.) i dębu szypułkowego (Quercus robur L.) z północno-wschodniej Polski
    Dendrochronological standards of Scots pine (Pinus sylvestris L.) and English oak (Quercus robur L.) from north-eastern Poland
    Autorzy:
    Krąpiec, M.
    Szychowska-Krąpiec, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1024214.pdf
    Data publikacji:
    2004
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    Polska Polnocno-Wschodnia
    dendrochronologia
    Quercus robur
    sosna zwyczajna
    lesnictwo
    dab szypulkowy
    standardy dendrochronologiczne
    Pinus sylvestris
    drzewa lesne
    pine
    oak
    tree−ring analysis
    local and regional chronologies
    ne poland
    Opis:
    The study presents results of dendrochronological analyses of Scots pine (162 trees) and English oak (97 trees) from 13 research plots located in NE Poland. The investigations resulted in construction of local chronologies (six for oak and seven for pine), which in turn enabled to define new regional chronologies; 2_NE_PL for pine, covering the period 1738−2003 AD, and Q_NE_PL for oak, 308−year long (1696−2003 AD). The elaborated chronologies allow for absolute dating of wood and yield new data on the extent of dendrochronological signal.
    Źródło:
    Sylwan; 2004, 148, 07; 11-19
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Czy zakładanie upraw dębowych metodą biologicznej racjonalizacji sprzyja zachowaniu leśnych zgrupowań skoczogonków (Collembola, Hexapoda)?
    Does alternative methods of oak plantations establishment create favourable conditions for forest collembolan assemblages (Collembola, Hexapoda)?
    Autorzy:
    Sławska, M.
    Sławski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/986682.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    hodowla lasu
    uprawy lesne
    uprawy debowe
    zakladanie upraw lesnych
    prowadzenie upraw lesnych
    metody biologicznej racjonalizacji
    fauna glebowa
    zgrupowania zwierzat
    skoczogonki
    Collembola
    oak cultivation
    corridor and tree group methods
    soil fauna
    species richness
    abundance
    Opis:
    Alternative methods of oak cultivation aim at reducing the cost of establishment of young plantations and decrease in the expenditure on their tending. In these methods, the corridors consisting of oak seedlings planted in the rows or isolated groups of twenty six seedlings are enclosed by stripes or patches without intervention left for natural succession. The restriction in site preparation on these areas and spontaneous development of young generation of trees are assumed to create favourable conditions for many forest organisms and, in results, significantly improve biological diversity of the managed forests. The aim of the study was to recognize the response of forest collembolan assemblages on alternative methods of establishment of oak plantations. The study was performed in the Forest Experimental Station in Rogów (Central Poland). In a mature stand on moderately humid mixed deciduous forest site, on clear−cut and on oak young plantations made by corridor and tree groups methods, fifteen study plots were established. In case of young plantations, these plots encompassed both artificially planted corridors or tree groups and adjacent fragments of plantation left for natural succession. Soil samples were taken in June and September 2014 and, using a simplified Tullgren apparatus, 18 thousands of collembolan specimens belonging to 84 taxa were identified. Our study proved that clear−cut and site preparation by rotary tiller on moderately humid mixed deciduous forest had a negative impact on Collembola assemblages, because caused a reduction in species number and abundance. However, the establishment of oak plantations by alternative methods, consisting in abandonment an artificial planting on some patches of renewed plots, significantly mitigate negative effects of clear−cut and reforestation on collembolan assemblages. The species number and abundance of springtails on patches left for spontaneous succession were distinctly higher than in artificially planted corridors or groups of trees in case of all studied plantations. Furthermore, it seems that corridor method in oak plantations establishment is advantageous for forest springtails, because the number of specimens per square meter on corridor plantation was higher than in tree group method. The beneficial effect on soil fauna of alternative methods of oak cultivation described in this paper weighs in favour of their wider application in silviculture.
    Źródło:
    Sylwan; 2018, 162, 07; 580-589
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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