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Wyszukujesz frazę "Durak, T." wg kryterium: Autor

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    Wyświetlanie 1-5 z 5
    Tytuł:
    Zmiany roślinności wschodniokarpackiego podgórskiego lasu mieszanego w warunkach ograniczonej gospodarki leśnej rezerwatu „Góra Sobień”
    Vegetation changes in East Carpathians piedmont mixed forest under restricted forest management in 'Gora Sobien' nature reserve
    Autorzy:
    Durak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1011968.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    zmiany skladu gatunkowego
    rezerwat Gora Sobien
    wskaznik Ellenberga
    rezerwaty przyrody
    lesnictwo
    lasy mieszane
    zwarcie drzewostanu
    „góra sobień” nature reserve
    deciduous forests
    change
    regeneration
    land use
    eastern carpathians
    Opis:
    In this study, the presence of changes leading towards renaturalization of the fertile deciduous forests has been established. An increase in the proportion of deciduous tree species and herbaceous species from clearings or forest margins also has been noted. The main direction of changes involved increase in humidity, trophic properties and reaction of soil. Improvement in properties of the ground forest, which is associated with an increase in dead organic matter counteracting the negative effect of beech leafs is the main cause of the changes. Ongoing processes should lead to an increase in the tree and undergrowth biodiversity, at the same time causing a decrease in spatial heterogeneity of the deciduous piedmont forest.
    Źródło:
    Sylwan; 2009, 153, 09; 627-634
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Różnorodność gatunkowa jako wskaźnik przemian roślinności w bieszczadzkiej kwaśnej buczynie górskiej
    Plant species diversity as an indicator of vegetation changes in acidophilous mountain beech forest
    Autorzy:
    Durak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/973949.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    Bieszczady Zachodnie
    leśnictwo
    zbiorowiska leśne
    zmiany użytkowania
    kwaśna buczyna górska
    runo leśne
    róznorodność gatunkowa
    wskaźnik równomierności
    liczba gatunków
    wskaźnik Shannona H
    diversity indices
    evenness index
    changes in forest
    forest regeneration
    eastern carpathians
    Opis:
    The intensity of disturbance plays a key role in shaping the biodiversity and hence it is a good tool for assessing community changes occurring in the Western Bieszczady, an area depopulated after World War II. Based on sampling of acidophilous mountain beech forest phytocoenosis repeated after 50 years, an analysis of plant biodiversity changes was conducted. The study focused on changes in the number of species, Shannon’s indicator, spatial distribution and coverage of specific ecological groups of species. The results confirm an undergoing process of regeneration of straitened phytocoenoses from 1958−1961, in which a slow improvement of the trophic conditions can be observed.
    Źródło:
    Sylwan; 2011, 155, 12; 843-850
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zmiany roślinności żyznej buczyny karpackiej z miesiącznicą trwałą Lunaria rediviva na podstawie analizy warstwy zielnej (Góry Słonne, Karpaty Wschodnie)
    Changes in vegetation of fertile Carpathian beech forests with perennial honesty Lunaria rediviva based on analysis of the herb layer (Slonne Mountains, Eastern Carpathians)
    Autorzy:
    Durak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/973990.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    zmiany skladu gatunkowego
    Góry Słonne
    zioła
    leśnictwo
    zbiorowiska roślinne
    Karpaty Wschodnie
    drzewostany bukowe
    zbiorowisko Dentarium glandulosae-Fagetum lunarietosum
    beech forests
    changes in forest
    ground vegetation
    species groups
    Eastern Carpathians
    Opis:
    Recently, the assessment of the degree and direction of changes in Carpathian forests has become a highly important subject. This study presents a floristic comparison between fertile Carpathian beech forest with perennial honesty surveyed in 1972−1973 and 2005−2008. The aim of the work is to determine the changes occurring in managed forests, based on the herb vegetation species. Changes were tested on community, semi−permanent sampling plot and species levels. The changes suggest a drop in humidity and fertility of the soil and an increase in light exposure. Also, an increase in biodiversity and species richness was observed. On the other hand, statistical analysis of the ecological groups of species indicated an ongoing process of reconstruction of the species structure, leading to a diminishment of the biological distinctiveness of the studied phytocenoses, and consequently to beech forest homogenization.
    Źródło:
    Sylwan; 2011, 155, 02; 120-128
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ warstwy drzew na różnorodność roślinności zielnej w zbliżonych do naturalnych wielogatunkowych lasach Puszczy Sandomierskiej
    Influence of tree layer on the diversity of the herbaceous vegetation in the semi-natural mixed Sandomierz Forest
    Autorzy:
    Durak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/989680.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewostany wielogatunkowe
    sklad gatunkowy
    struktura drzewostanu
    runo lesne
    ziola
    roznorodnosc gatunkowa
    rezerwat Las Klasztorny
    Puszcza Sandomierska
    biodiversity
    herbaceous layer
    ecosystem functioning
    monitoring
    Opis:
    Stand characteristics are important factors influencing the biodiversity of the herbaceous plants that play important roles in the functioning and shaping the structure of the forest. This study investigates the relationship between the characteristics of the tree layer and the diversity of the herbaceous layer in the semi−natural remnants of the former Sandomierz Forest (Kolbuszowa Plateau, SE Poland). The study was conducted in ‘Las Klasztorny' reserve on 40 circular plots (0.05 ha) centered on the nodes of a grid covering the area of the reserve. Each plot was analyzed in terms of the composition of the tree stand, and the height and diameter at the breast height (DBH) of live trees. In order to analyze species diversity in the herbaceous layer, the incidence of vascular plant species was recorded on 24 surfaces (1×1 m) along a transect passing through the center of each plots. For each plot the Shannon index of species diversity was calculated. Results were analyzed by multivariate PCA method. Average tree density in the reserve was 741 trees/ha and the average basal area was 33.4 m²/ha. Tree stands consisted mainly of Pinus sylvestris, Abies alba, Fagus sylvatica, Quercus robur and Carpinus betulus. Fir and pine were the most frequent. Pine had the largest share in the total basal area. The first and second PCA axis demonstrated high correlation of herbaceous plant diversity with tree characteristics (r=0.95 and r=0.71, respectively). The first axis showed the greatest negative relation with beech basal area proportion, and positive dependence on oak density and share of pine in basal area on the research plots. The second gradient showed a strong positive correlation with oak basal area proportion, and negative with trees density. Correlation analysis of tree stand characteristics and the herbaceous layer confirmed the negative impact of beech on herbaceous layer diversity. It also indicated a positive dependence of the herbaceous layer species diversity on species richness in the tree layer, oak density and average DBH. The results indicated a positive dependence of herbaceous plant diversity on the development of the tree stand. The observed greater diversity of herbaceous plants in the old growth forests with diverse spatial and species structures indicates the high importance of the old stands in maintaining forest biodiversity.
    Źródło:
    Sylwan; 2015, 159, 01; 45-52
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Rozprzestrzenianie się zarośli drzewiastych w piętrze połonin Bieszczad Zachodnich
    Expansion of brushwood in the subalpine zone of the Western Bieszczady Mts.
    Autorzy:
    Durak, T.
    Żywiec, M.
    Ortyl, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/993087.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    Bieszczady Zachodnie
    rzeka Mala Rawka
    Wielka Rawka
    poloniny
    zarosla
    drzewa
    jarzab pospolity
    Sorbus aucuparia
    olsza zielona
    Alnus viridis
    rozprzestrzenianie sie roslin
    abandoned grasslands
    land use
    sorbus aucuparia
    succession
    eastern carpathians
    Opis:
    Complete discontinuation of agricultural use of subalpine meadows in the Western Bieszczady, which dates back to 1940s, started the process of their overgrowing with brushwood. Based on available cartographic material the following features were analysed: changes in the area occupied by brushwood on Mała Rawka and Wielka Rawka subalpine meadows, their growth rate and the relationship between the overgrowth process and the previous manner of agricultural use as well as topographic conditions throughout last 30 years. In that period the brushwood on Mała Rawka meadow (in the past the area had been reaped) was characterised by a small initial area (in the 1980s), a significant growth rate of the area and its relation to the slopes exposed to N, NE and E, the zone adjacent to the timber line and steeper slopes. In 1980 on Wielka Rawka meadow (previously used as a pasture) a high share of brushwood was found (about 25% of the meadow area), whose distribution was related only to the slopes of N, NE and E exposure. In subsequent years the growth rate was low. The results indicate a progressing process of overgrowing of subalpine meadows by brushwood. The brushwood expansion is related to discontinuation of agricultural use of the meadows and its course depends on the earlier regime of cultivation. The pattern of brushwood distribution also depends on altitude, exposure and the grade of slopes. Those relations result from the expansion of the rowan tree, dominating in the brushwood, also climatic conditions and accessibility of the ground.
    Źródło:
    Sylwan; 2013, 157, 02; 130-138
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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