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    Wyświetlanie 1-4 z 4
    Tytuł:
    Zamieranie olszy czarnej Alnus glutinosa (L.) Gaertn. wzdłuż rzeki Narewki na terenie Nadleśnictwa Białowieża
    Decline of Black Alder Alnus glutinosa (L.) Gaertn. along the Narewka River in the Białowieża Forest District
    Autorzy:
    Malewski, T.
    Topor, R.
    Nowakowska, J.A.
    Oszako, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/2142614.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    alder
    dieback
    drought
    Phytophthora
    pcr
    olsza
    zamieranie
    susza
    Opis:
    Black Alder Alnus glutinosa (L.) Gaertn. is an important tree commonly growing in Poland. Alders are actinorhizal plants that play an important ecological role in riparian ecosystems through atmospheric nitrogen fixation, filtration and purification of waterlogged soils as well as providing a refuge for terrestrial and aquatic organisms thus helping to stabilize stream banks. Black Alder used to be considered a very pest and disease resistant species but, the situation changed in 2000, when an unprecedented decline of Alders was observed in Poland. In the Białowieża Forest District, this decline has been observed on wet meadow habitats and along rivers or watercourses. Currently, there are several hypotheses explaining Alder dieback, among them climatic changes and Phytophthora infections. In terms of climate, Black Alder requires a high atmospheric humidity during all phases of its reproductive cycle. It tolerates neither long-term summer flooding nor a significant decrease in the groundwater level. In terms of pests, oomycete pathogens of the genus Phytophthora are the most destructive plant pathogens known and many of them are present in forests and nurseries all over Europe. The aim of this study was to evaluate the health of Black Alder along the Narewka River in the Białowieża Forest District. Selected areas were monitored in 2012 and 2018, but no relationship between drought and alder health was found. A preliminary analysis of soil and water samples by real time PCR revealed the presence of two Phytophthora species: P. alni and P. cactorum. Further and more detailed research is required to elucidate the role of these pathogens in Alder dieback.
    Źródło:
    Leśne Prace Badawcze; 2020, 81, 4; 147-152
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dynamics of Cu, Mn, Ni, Sr and Zn release during decomposition of four types of litter in headwater riparian forests in northern Poland
    Autorzy:
    Jonczak, J.
    Parzych, A.
    Sobisz, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/1317603.pdf
    Data publikacji:
    2014
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    heavy metal
    strontium
    black alder
    leaf litter
    decomposition
    dynamics
    copper
    manganese
    nickel
    zinc
    headwater area
    riparian forest
    Polska
    leaf litter decomposition
    headwater areas
    heavy metals
    Opis:
    The aim of the study was to compare the dynamics of Cu, Mn, Ni, Sr and Zn release during decomposition of leaves of Black alder (native material), Norway maple, Red oak and European beech (exogenous material) in the area of headwater riparian forests along the upper course of the Kamienna Creek (Northern Poland). Litter bag method was used in the experiment. Initial materials differed in terms of their chemical composition. Cu, Mn, Ni, Sr and Zn contents were low in general, and in fact, even a few times lower than limit values for decomposition rate. Different trends in the dynamics of the leaf metal content during decomposition were observed in particular tree species despite the fact, that every materials were exposed in the same site. Release dynamics was strongly affected by the content of metals in initial materials and in topsoil. Accumulation of Cu, Mn and Zn was observed during decomposition of poorest in the elements maple leaves, as well as Ni in alder leaves and Sr in the leaves of maple, alder and oak. In beech leaves we observed intensive leaching of Ni, whereas downward trends in the Cu concentration of beech leaves, as well as Mn and Zn in beech and oak leaves, were related to weight loss of the leaves. In some cases, the dynamics of metal release displayed a more complicated two- or three-stage character (release of Ni from maple and oak leaves; Cu from maple leaves; Sr from alder, maple and oak leaves; and Zn from alder and maple leaves).
    Źródło:
    Leśne Prace Badawcze; 2014, 75, 2; 193-200
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synantropizacja flory roślin naczyniowych rezerwatu Wieliszewskie Łęgi (środkowa Polska)
    Synanthropization of vascular plant flora in the Wieliszewskie Legi Nature Reserve (central Poland)
    Autorzy:
    Zaniewski, P.T.
    Dembicz, I.
    Zaniewska, E.
    Kanabus, A.
    Kozub, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/2136714.pdf
    Data publikacji:
    2021
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    rezerwaty przyrody
    rezerwat Wieliszewskie Legi
    flora
    rosliny naczyniowe
    sklad gatunkowy
    synantropizacja
    wskaznik synantropizacji
    apophytization
    kenophytization
    anthropophytization
    disturbance
    embankments
    transformation into oak-hornbeam
    forest
    transformation into alder carr
    Mazovia
    Opis:
    Understanding human influence on vegetation dynamics is important from both conservation and human management perspectives. The Wieliszewskie Łęgi Reserve, located in central Poland, is a young forest area that was cut off from the flood waters of the Narew river in 1963, but since then has been constantly and intensively supplied with water from overflows under the dike. On the southern side, adjacent to the reserve, there are patches of valuable meadows, rushes and scrub communities. The aim of this study was to determine the degree of synanthropization of the flora in the Wieliszewskie Łęgi reserve and to assess changes occurring in its vegetation. The vascular plant flora of the reserve and its southern vicinity was surveyed in 2017 and the plant communities within the study area were mapped. In the area of the reserve, we observed a total of 264 vascular plant species, whereas for the entire area under study, 314 spe- cies were recorded. Of these, 14 were classified as valuable. The high species richness was mainly due to the presence of a large number of apophytes – native species quickly colonizing sites transformed by man. Therefore the degree of naturalness of the reserve's flora was relatively low, which is most likely due to the lack of refugia for typical forest species. A number of plant communities of non-forest, scrub and forest character, typical for swampy, wet, semixeric as well as dry habitats were recorded. Succession, manifested by the disappearance of non-forest and scrub communities and progression of forest communities, is superimposed on the processes of transformation into semixeric oak-hornbeam communities in the highest areas and carr com- munities in the lowest areas. A low proportion of kenophytes (16 species) and a zero value of the index of fluctuation changes indicate a relative resistance of the reserve to invasion by alien species.
    Źródło:
    Leśne Prace Badawcze; 2021, 82, 2; 47-66
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prędkość propagacji fali dźwiękowej w pniach olszy czarnej Alnus glutinosa (L.) Gaertn. w zależności od temperatury
    Temperature dependence of sound wave propagation in as a diagnostic tools for healthy and rotten black alder (Alnus glutinosa (L.) Gaertn.) tree trunks
    Autorzy:
    Orzechowski, M.
    Budniak, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1317727.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    drzewa
    olsza czarna
    Alnus glutinosa
    pnie drzew
    fale dzwiekowe
    propagacja fal
    predkosc dzwieku
    czynniki atmosferyczne
    temperatura powietrza
    alder
    speed of sound wave propagation
    temperature
    internal decay
    impulse hammer
    Opis:
    The aim of this study was to determine how thermal conditions affect the speed of sound wave propagation, in trunks of living alder Alnus glutinosa (L.) Gaertn. trees. This method in practiced when diagnosing the presence of internal decay in standing trees. Field work was carried out four times at different temperatures (+13°C, +3°C, -7°C and -16°C) using an Impulse Hammer. There was a significant correlation between the thermal conditions and the speed of sound wave propagation. Therefore, temperature must be taken into account to correctly diagnose tree health and timber quality.
    Źródło:
    Leśne Prace Badawcze; 2013, 74, 4; 285-291
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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