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    Wyświetlanie 1-3 z 3
    Tytuł:
    Zastosowanie drzew klasyfikacji do określenia preferencji środowiskowych gatunków na przykładzie głuszca (Tetrao urogallus)
    Application of classification trees for assessment species habitat preferences on the example of capercaillie (Tetrao urogallus)
    Autorzy:
    Bolibok, L.
    Brzeziecki, B.
    Drozdowski, S.
    Zawadzka, D.
    Zawadzki, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/990006.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    lowiectwo
    ptaki lowne
    gatunki chronione
    gluszec
    Tetrao urogallus
    preferencje srodowiskowe
    metody analizy
    drzewo klasyfikacyjne
    classification
    tetrao urogallus
    environmental preferences
    augustowska forest
    Opis:
    Habitat preferences of capercaillie Tetrao urogallus in the Augustowska Forest (NE Poland) were evaluated using classification trees. Data were collected on 1033 circular sampling plots localized on leks and in their vicinity with 1 km radius. Gathered information described tree stands (site conditions, age, species composition, tree density, closure, vertical structure, lower strata coverage (saplings and shrubs) and blueberry coverage (Vaccinium myrtillus) as well signs of capercaillie presence. The analysis shows that for capercaillie of key importance are tree stands growing on fresh or wet coniferous sites, more than 100 years old, with density less than 446 trees/ha, with anthill and situated more than 150 from a road.
    Źródło:
    Sylwan; 2014, 158, 04; 267-276
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Występowanie, kondycja i zagrożenia zimoziołu północnego w Puszczy Augustowskiej
    The twinflower in the Augustow Forest: occurrence, condition and threats
    Autorzy:
    Zawadzka, D.
    Zawadzki, G.
    Bednarek, J.
    Bednarek, J.B.
    Piechowska, D.
    Mikitiuk, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1293182.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    lesnictwo
    lasy
    Puszcza Augustowska
    inwentaryzacja przyrodnicza
    rosliny chronione
    rosliny ginace
    zimoziol polnocny
    Linnaea borealis
    wystepowanie
    stanowiska
    kondycja
    zagrozenia roslin
    Opis:
    The twinflower Linnaea borealis L. is a rare, boreal plant species that grows in coniferous forests and is partly protected in Poland. We studied its distribution and the condition of twinflower patches in the Augustów Forest (NE Poland) describing 22 twinflower patches in total. The following features were assessed: (1) patch area, (2) distance between individual twinflowers, (3) patch density, (4) intensity of flowering, (5) fruiting, (6) main accompanying plant species, (7) plant community structure, (8) species composition and age of the forest stands, (9) canopy cover of the forest stands, (10) existing and potential threats. In the northern part of the forest where suitable pine sites dominated, twinflowers were distributed irregularly and unevenly. Twinflowers in the Augustów Forest occur in relatively big areas with individual patches covering from 100 m2 to 3000 m2, but most commonly 500–1000 m2. The mean distance to the nearest neighbouring twinflower was 1600 m (range from 250 m to 6035 m). This pattern of distribution and separating distance does allow for sexual reproduction within the studied forest stand and blooming was confirmed in 21 out of 22 patches. In four locations, intensive blooming with >50 flowers shoot/m2 was observed. We did not observe a dependency of the flowering intensity on patch size. Despite the intensive and frequent flowering, as well as the presence of fruits, which were found in 15 patches, the twinflower reproduces mainly vegetatively. Twinflowers grew in 34–166 years-old pine-spruce stands with moderate canopy cover, but there was no relationship between the age of forest stands and the size of a flower patch. Plant species, which commonly occurred with twinflowers were: Vaccinium myrtillus, Calamagrostis arundinacea, Goodyera repens, Rubus saxatilis, Fragaria vesca, Pleurosium schreberi. Twinflower communities are threatened by invasive species in the forest understory in two locations only, while in the other locations no active protection is needed and the plants should rather be protected and monitored through multifunctional forest management. We emphasise the importance of the Augustów Forest for the twinflower in Poland, because about 10% of the Polish population grows in this forest complex.
    Źródło:
    Leśne Prace Badawcze; 2017, 78, 1
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Liczebność i rozmieszczenie głuszca w Polsce w XXI wieku
    Population size and distribution of the capercaillie in Poland in the 21st century
    Autorzy:
    Zawadzka, D.
    Żurek, Z.
    Armatys, P.
    Stachyra, P.
    Szewczyk, P.
    Korga, M.
    Merta, D.
    Kobielski, J.
    Kmieć, M.
    Pregler, B.
    Krzan, P.
    Rzońca, Z.
    Zawadzki, G.
    Zawadzki, J.
    Sołtys, B.
    Bielański, J.
    Czaja, J.
    Flis-Martyniuk, E.
    Wediuk, A.
    Rutkowski, R.
    Krzywiński, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/980118.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    lowiectwo
    ptaki lowne
    gatunki chronione
    gluszec
    Tetrao urogallus
    wystepowanie
    liczebnosc populacji
    rozmieszczenie przestrzenne
    Polska
    wiek XXI
    tetrao urogallus
    species distribution
    species abundance
    refuges
    poland
    Opis:
    The data on the distribution and number of the capercaillie Tetrao urogallus in Poland for the period from the end of the 20th century up to 2017−2018 is presented. The capercaillie is a sedentary forest grouse living in old mountain forests and within the boreal zone. Since more than a century, the decrease in the numbers of the species has been observed, interlinked with the extinction of isolated populations. Within the present borders of Poland, a 1925 questionnaire study noted 2200−2700 individuals. In the 1960s, the national population was estimated at 1700−2000 birds, living in five isolated populations. In 1985−1995, the population numbers of the capercaillie dropped to approx. 466−700 individuals in four regions, and in 2000 it was estimated at 470−570 birds. According to the results of the censuses performed in 2017−2018, the size of the capercaillie population risen to 523−631 individuals and 59−69 lekking grounds. Currently the capercaillie occurs in four isolated regions. These are the Western Carpathians (the Beskid Sądecki, Tatry, Gorce, Babia Góra, Beskid Żywiecki, and the Beskid Śląski ranges) where 284−326 individuals live and 35−41 leks are active. In the Solska and the Lasy Janowskie Forests (Lublin region), the population was estimated at 132−184 individuals and 12−13 lekking grounds. In the Augu− stów Forest (Podlasie region) 36−46 individuals and 5−7 leks were found. In the Bory Dolnośląskie Forest, where native capercaillies got extinct during the last decade, the reintroduction program resulted in the rebuilding of their 65−75 population (with 6−7 leks). The restitution of the species in the Piska Forest has begun. During the last 20 years, populations in the Carpathian national parks have been stable, although fluctuating in numbers. The increase in the number of individuals in the Augustów Forest as well as in the Sądecki and Beskid Śląski Mountains is an after−effect of the release of birds from breeding centers or translocations. In other strongholds, fluctuations or decreases have been recorded, including wisible in the Beskid Żywiecki Mountains.
    Źródło:
    Sylwan; 2019, 163, 09; 773-783
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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