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    Tytuł:
    Warunki środowiska wpływające na stan zachowania obuwika pospolitego Cypripedium calceolus L. w lasach gospodarczych
    Environment conditions influence on protection status of ladys slipper orchid Cypripedium calceolus L. in managed forests
    Autorzy:
    Czerepko, J.
    Gawryś, R.
    Cieśla, A.
    Sokołowski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/991313.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    rosliny chronione
    gatunki zagrozone
    obuwik pospolity
    Cypripedium calceolus
    wystepowanie
    stan zachowania
    warunki srodowiska
    lasy gospodarcze
    endangered species
    natura 2000
    plant ecology
    Opis:
    The paper concerns forest populations of lady's slipper orchid (Cypripedium calceolus L.). The study sites were located in localities with the most numerous populations of Cypripedium calceolus L. in managed forests in Poland. The field studies were conducted in 2012 according to Natura 2000 sites protocols. The aim of studies was the determination of population structure of lady's slipper orchid, especially in indexes reflected number of flowering and fruit plants. The relations between above factors and environmental conditions expressed by ecological indicator values, cover of vegetation layers, species richness, stand age, and intensity of thinning were studies. The obtained results confirmed negative influence of understorey layer and positive influence of density of tree layer on the development of studied orchid populations. The increase in thinning intensity has not significant influence on protection status of Cypripedium calceolus.
    Źródło:
    Sylwan; 2014, 158, 11; 867-874
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stopień uszkodzenia drzewostanów świerkowych Gór Sowich
    Damage to spruce stands in the Sowie Mountains
    Autorzy:
    Dmyterko, E.
    Kluziński, L.
    Bruchwald, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/990883.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    Gory Sowie
    drzewostany swierkowe
    uszkodzenia drzewostanow
    swierk pospolity
    Picea abies
    uszkodzenia drzew
    korony drzew
    reakcje przyrostowe
    warunki srodowiska
    degree of damage
    growth response
    picea abies
    poland
    Opis:
    The aim of the research was to assess the degree of damage to spruce trees and stands and to study their growth responses to the changing environmental conditions in the Sowie Mountains (Central Sudety Mts.). To assess the degree of damage to trees, three methods based on crown characteristics were used. The types of growth responses of trees to changing environmental conditions were additionally taken into account in one of the methods. Regardless of the assessment method, spruce stands in the Sowie Mountains demonstrated a high level of damage. The poorest growth conditions were found in the period 1966−1980 when a large number of trees showed negative growth responses, indicating a decrease in radial increment. The period 1996−2010 showed an improvement in the growth conditions of trees because the proportion of trees with negative growth responses decreased, while the proportion of trees with positive growth responses increased. It was also found that the growth conditions for spruce were more favourable in the lower montane forest zone (above 600 m a.s.l.), and less favourable at the foothills (below 600 m a.s.l.), which may be caused by the competition of beech replacing spruce in the lower locations in the mountains.
    Źródło:
    Sylwan; 2014, 158, 03; 173-182
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stopień uszkodzenia drzewostanów jodłowych Beskidu Niskiego
    Degree of damage to silver fir stands in the Beskid Niski Mts.
    Autorzy:
    Dmyterko, E.
    Bruchwald, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/989946.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewostany jodlowe
    uszkodzenia drzewostanow
    jodla pospolita
    Abies alba
    uszkodzenia drzew
    korony drzew
    reakcje przyrostowe
    warunki srodowiska
    radial increment
    environmental changes
    primary crown
    secondary crown
    abies alba
    Opis:
    The main aim of the research was to study trees growth responses to the changing environmental conditions and to assess the degree of damage to trees taking into consideration their secondary crown. Based the material from plots established in 12 silver fir stands (tab.), chronologies were developed for trees in various age classes (fig. 1). 1950 saw a downward trend in the radial growth that continued till 1985, to be followed by an upturn lasting till 2000, when the radial growth stabilised. No significant changes in tree−growth were observed in the group of the youngest trees. Three types of growth response to environmental changes (positive, neutral and negative) were distinguished in the last three 15−year−long periods. In years 1970−1984 the largest proportion of firs indicated negative growth responses, while firs with positive response dominated in the period 2000−2014 (fig. 2). The period 1970−2014 saw a steady increase in the mean value of growth responses. The assessment of the top−crown growth (feature B) showed that more than 50% of the trees showed inhibited growth (fig. 3). The assessment of tree vitality (feature C) confirmed the dominance of trees with moderate crown vitality. The vitality of the secondary crowns (Zw) situated below the primary crowns (Zp) of firs was assessed on the basis of crown density and its length (formula [1]). Incorporating Zw in the assessment of tree damage (formula [2]) resulted in an increase in the vitality of the whole crown (Z) (fig. 4). Based on the defoliation, 73% of trees were found to be within damage class 2 (fig. 5). Another method of damage to trees determination was adopted (formula [3]) to assess the damage to fir stands and showed that the largest proportion of trees was with moderate damage (fig. 6). The damage index values obtained with this method were lower compared to the method that considers the defoliation exclusively. Even lower index values were obtained while using the method based on both damage index W and tree−growth response. Of the three discussed damage assessment methods, the most accurate is the method based on damage index Wz, taking into account the growth response of the entire crown (Z).
    Źródło:
    Sylwan; 2015, 159, 11; 893-904
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Znaczenie wybranych czynników kształtujących powierzchnie terytoriów puszczyka Strix aluco w lasach Lubelszczyzny
    Importance of selected factors influencing the size of tawny owl Strix aluco territories in the forests of Lublin region
    Autorzy:
    Cios, S.
    Grzywaczewski, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/993198.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    Lubelszczyzna
    lasy
    ptaki
    puszczyk
    Strix aluco
    zageszczenie populacji
    wielkosc terytorium
    warunki srodowiska
    pory roku
    czynniki siedliska
    rzezba terenu
    fazy ksiezyca
    terytorializm
    strix aluco
    territory size
    phenological seasons
    Opis:
    Study analysis the influence of selected factors on the size of tawny owl Strix aluco territories in the forests of Lublin region. The survey was held in years 2005 and 2006 using the voice stimulation. The territory area was determined using Minimum Convex Polygon method. 43 territories with the average size of 18.8 ha were set on 26 study sites. The largest territory was found for birds during laying and incubation period (102.6 ha) and during after−breeding period (98.3 ha). Significant differences in territory size was found depending on the breeding density (high density – average territory size of 5.1 ha, low density – 26.9 ha). The average territory area in winter was 1.5 ha (range 1−2.7 ha), in spring 20.8 ha (1−102.6 ha), in summer 10.8 ha (1−65.5 ha) and in autumn 30.9 ha (1−98.3 ha).
    Źródło:
    Sylwan; 2013, 157, 05; 348-357
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Czynniki determinujące aktywność saren polnych
    Factors determining the activity of field roe deer
    Autorzy:
    Kamieniarz, R.
    Szymański, M.
    Panek, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/986627.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lowiectwo
    zwierzeta lowne
    sarna
    Capreolus capreolus
    sarna polna
    aktywnosc zwierzat
    aktywnosc dobowa
    aktywnosc sezonowa
    warunki srodowiska
    uprawy polowe
    zadrzewienia srodpolne
    czynniki meteorologiczne
    daily activity
    seasonal activity
    open farmland
    clumps and belts of trees or shrubs
    Opis:
    Between 2009 and 2011, behaviour of 15 field roe deer living in agricultural landscape in western Poland was studied using the radio telemetry method. Observed animals were active during the entire day with two distinct peaks – at the dawn and at the dusk. Moreover, night activity was greater than the day one. Such activity pattern may result from frequent human presence in the field roe deer habitat. Throughout the year, the activity rate (locations of active roe deer/all locations ratio) was higher in the agricultural lands than in clumps and belts of trees, which the most likely was the consequence of availability of easily digestible food in the crop fields (during growing season as well as after its end). Furthermore, field roe deer activity in open farmlands was the subject to bigger changes – both during warm months and in the winter it was the highest during the lowest temperature. Such changes were not observed in mid−field places with trees. However, in such places the activity rate was higher during periods of snow cover than during snowless ones.
    Źródło:
    Sylwan; 2018, 162, 03; 258-264
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ocena jakości wód źródlanych w rejonie Skrzycznego i Baraniej Góry
    Quality assessment of spring water from the area of Skrzyczne and Barania Gora mountains
    Autorzy:
    Małek, S.
    Astel, A.
    Krakowian, K.
    Opałacz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1008955.pdf
    Data publikacji:
    2010
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    gory
    Beskid Slaski
    Skrzyczne
    Barania Gora
    zrodla
    woda zrodlana
    jakosc
    wlasciwosci chemiczne
    odczyn wody
    przewodnosc elektrolityczna
    stezenie jonow
    warunki srodowiska
    podloze geologiczne
    gleby
    siedliska
    szata roslinna
    wysokosc nad poziomem morza
    rzezba terenu
    springs
    water quality
    beskid śląski
    snowmelt
    spruce stands
    Opis:
    The study was carried out in the year 2009 on northern, southern and western slopes of Skrzyczne and Głębczański and Roztoczański stream catchments on Barania Góra in the Beskid Śląski Mountains. Water samples were collected from springs during snowmelt (May 1st−3rd). Data set consisting of conductivity, water pH, concentrations of major anions (Cl–, NO3–, SO42–), major cations (Na+, K+, Ca2+, Mg2+) and metals (Al, Fe, Mn, Zn) was produced. Waters were then classified according to Polish standards. Water class depended strongly on chemical composition of melting snow. It was found that water from most sampling points in springs was not potable – 39 out of collected 48 samples on Skrzyczne and 51 out of 57 samples collected on Barania Góra were beyond the first class according to Polish standard from the year 2008. The main reason for that was too low pH and high NO3– concentration. Chemical composition of spring waters depended also on plant cover and local properties of drainage areas. Statistically significant difference was observed between spruce and beech stands. Springs located in beech stands characterised higher concentrations of Ca2+, Mg2+, K+, Na+, SO42–, Cl– and higher PEW and additionally on Barania Góra higher pH as well. This dependence should be considered while planning stand composition in springs neighbourhood.
    Źródło:
    Sylwan; 2010, 154, 07; 499-505
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wplyw Doliny Wisly w rejonie Wilanowa na warunki anemometryczne i termiczne powietrza
    Autorzy:
    Bednarek, A.
    Ozga, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/814943.pdf
    Data publikacji:
    1997
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    Dolina Wisly
    warunki anemometryczne
    czynniki srodowiska
    warunki klimatyczne
    Wilanow Zachodni
    Warszawa
    warunki termiczne
    Źródło:
    Sylwan; 1997, 141, 03; 65-74
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Glebowo-wodne uwarunkowania prowadzenia gospodarki leśnej w perspektywie zmian klimatu
    Soil-water determinants of forest management in the perspective of climate change
    Autorzy:
    Boczoń, A.
    Kowalska, A.
    Gawryś, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/986699.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    gospodarka lesna
    zmiany klimatyczne
    zmiany warunkow srodowiska
    warunki glebowo-wodne
    drzewostany
    woda glebowa
    dostepnosc wody
    susza glebowa
    drought
    soil water
    climate projections
    Opis:
    The paper reviews the projected impacts of climate change on forest stands in relation to the local conditions in Poland. One of the most urgent challenges for foresters in Central Europe is adapting the stands to the effects of climate change. Warming of the climate will lead to limited soil water availability to forest stands and to the increasing risk of long−term drought. The threatof soil drought depends on the meteorological conditions, but also on the ability of the soil to retain water. In Poland, forests grow mainly on poor sandy soils with low water retention capacity. Additionally, relatively small precipitation – less than 600 mm per year – occurs in most areas of Poland and long−term periods without precipitation are more and more frequent. In 2015, drought affected large area of the country. The forests are severely exposed to the stress of drought caused by climate change. Polish forests ared comprised of rather small number of tree species. It is considered that drought will threaten the biodiversity of forests. Of all tree species in Poland, Scots pine has the best ability to survive drought and therefore it can be expected that the share of pine in the stands will increase in the future. Pedunculate oak, which is the most common deciduous species in Poland, may retreat because of its vulnerability to drought. Forest management should aim at the adaptation of stands to climate change. The proportion of species resistant to drought stress should be increased. The thinning of forest stand can help to reduce damage. A smaller number of trees contributes to lower interception and consequently increases the amount of water reaching the soil. In some opinions the reduction in the number of trees and the density of the canopy reduces evapotranspiration, but not in Scots pine stands.
    Źródło:
    Sylwan; 2017, 161, 09; 763-771
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Adaptacja jodły jednobarwnej oraz jodły pospolitej do warunków klimatycznych nizin zachodniej Polski
    Adaptation of silver and white fir to the climate of lowlands in western Poland
    Autorzy:
    Wilczyński, S.
    Olejnik, M.
    Szymański, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/986632.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    Abies concolor
    lesnictwo
    drzewa lesne
    jodla pospolita
    Abies alba
    jodla jednobarwna
    przystosowanie do srodowiska
    analiza dendrochronologiczna
    warunki klimatyczne
    niziny
    Polska Zachodnia
    Nadlesnictwo Rzepin
    abies alba
    abies concolor
    dendroclimatology
    Opis:
    The study analysed the causes of the annual variation of tree−ring widths of silver fir and white fir. The partial populations of both fir species has been growing for over 100 years in Rzepin (western Poland) in a fresh broadleaved forest site. We assumed that the year−to−year changes of the size of radial increment presents sensitivity of trees to local climate factor. The period from 1931 to 2015 was analysed. We found that the silver and white firs had high homogeneity of radial growth responses and sensitivity to year−to−year changes of weather conditions. Warm November of the previous year, short winter and high air temperature in August had positive influence on the size of their radial increment. Moreover, precipitation in February, April and July of the year of tree−ring formation contributed to wider tree−ring. The white fir was highly resistant to winter frost in contrast to the silver fir. In addition, this fir species preferred cold springs. Furthermore, the silver fir suffered from overabundant precipitation in August. The climate conditions of western lowland part of Poland were not a limiting factor for growth of both species because the studied populations achieved the highest site index class.
    Źródło:
    Sylwan; 2018, 162, 03; 220-230
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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