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    Wyświetlanie 1-11 z 11
    Tytuł:
    Biogrupy drzew w lesie naturalnym: czy prof. Włoczewski miał rację?
    Tree biogroups in natural forests: was prof. Włoczewski right?
    Autorzy:
    Brzeziecki, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1024241.pdf
    Data publikacji:
    2004
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    biogrupy
    las naturalny
    lesnictwo
    Bialowieski Park Narodowy
    rozmieszczenie przestrzenne
    drzewa lesne
    białowieża national park
    contagion index
    natural forest
    permanent plot
    spatial pattern
    tree biogroup
    Opis:
    The contagion index [Gadow i in. 1998] is used to analyse a spatial pattern of trees in a natural forest stand occurring on a permanent study plot, located in a compartment 319 of the Białowieża National Park. By means of this index it is found that at a small spatial scale, the random occurrence of trees is a dominating mode of tree spatial pattern. At the same time, the share of trees forming biogroups is estimated to ca. 25% (at average). The results are compared with similar analysis performed by means of the Donnelly index and the Ripley's K function.
    Źródło:
    Sylwan; 2004, 148, 07; 3-10
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Struktura i dynamika wielogeneracyjnych starodrzewów sosnowych występujących w obszarach ochrony ścisłej Kaliszki i Sieraków w Kampinoskim Parku Narodowym. Część 1. Zróżnicowanie gatunkowe, zagęszczenie i pierśnicowe pole przekroju
    Structure and dynamics of uneven−aged Scots pine−dominated old−growth stands in Kaliszki and Sieraków strict protection areas in the Kampinos National Park. Part 1. Species composition, tree density and basal area
    Autorzy:
    Brzeziecki, B.
    Zajączkowski, J.
    Olszewski, A.
    Bolibok, L.
    Andrzejczyk, T.
    Bielak, K.
    Buraczyk, W.
    Drozdowski, S.
    Gawron, L.
    Jastrzębowski, S.
    Szeligowski, H.
    Żybura, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/978936.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    forest dynamics
    long−term research
    old−growth forest
    permanent study plot
    strict protection
    tree
    species composition
    Opis:
    The paper describes changes, which took place over the last 30 years in old−growth forest stands occupying two permanent research plots, established in the Kaliszki and Sieraków strict protection areas in the Kampinos National Park (central Poland). Both plots have a form of ecological transects. The Kaliszki plot is 20 m wide and 700 m long (1.40 ha), while the Sieraków plot (total area of 2.56 ha) consists of two parts: main (40×460 m) and side (40×180 m) transect. In the Kaliszki plot, the stand measurements were conducted in 1993, 2007, and 2017, while in the Sieraków plot – in 1989, 1994, 2006, and 2017. For every tree with breast height diameter (DBH) 5 cm, species identity, DBH and spatial coordinates were determined. Starting from the second census, all trees which had died (‘losses’), as well as trees which exceeded the DBH threshold (‘gains’) since the previous record were noted, as well. The major tree species occurring on sample plots are Scots pine (Pinus sylvestris), pedunculate oak (Quercus robur), silver and downy birch (Betula sp.), and black alder (Alnus glutinosa). During the study period, the overall tree density declined by ca. 50%. The diminishing trends occurred for all dominant tree species. In contrast to major, dominant tree species, the demographic status of a group of minor tree species (lime, hornbeam and maple) was much more stable. One may even speak about some expansion in this case. Particularly, hornbeam density increased rapidly in the period 2006−2017 in some areas of the main transect located in the Sieraków plot. The future studies will show if this tendency will be maintained and will include other regions of sample plots. Assuming a lack of significant disturbances, one may expect that the stands growing on research plots will rather slowly change in the nearest future. Most dynamics will have a quantitative and not qualitative character. One may anticipate, for example, a growing role of pedunculate oak at the expense of Scots pine, however, considering that the two species are rather long−living, they will probably for a long time keep their dominant roles in the stand canopies.
    Źródło:
    Sylwan; 2020, 164, 05; 392-403
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Struktura i dynamika wielogeneracyjnych starodrzewów sosnowych występujących w obszarach ochrony ścisłej Kaliszki i Sieraków w Kampinoskim Parku Narodowym. Część 2. Procesy zamierania i dorastania oraz ich wpływ na rozkład grubości drzew
    Structure and dynamics of uneven−aged, Scots pine−dominated, old−growth stands in Kaliszki and Sieraków strict reserves in Kampinos National Park. Part 2. Tree mortality and recruitment processes and their effects on tree diameter distributions
    Autorzy:
    Brzeziecki, B.
    Zajączkowski, J.
    Olszewski, A.
    Bolibok, L.
    Andrzejczyk, T.
    Bielak, K.
    Buraczyk, W.
    Drozdowski, S.
    Gawron, L.
    Jastrzębowski, S.
    Szeligowski, H.
    Żybura, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/979128.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    demographic non−equilibrium
    diameter structure
    long−term study
    old−growth forest
    permanent study
    plot
    scots pine
    strict protection
    Opis:
    Two fundamental demographic processes (tree recruitment and mortality) are analyzed for forest stands growing on permanent study plots located in strictly protected Scots pine−dominated, old−growth stands of Kampinos National Park (central Poland). The major implications of the observed demographic trends for the general shape of tree size distributions are determined, as well. During the past ca 30 years, in the stands sampled, there was a pronounced lack of balance between mortality and recruitment processes. Mortality rate was eight times higher than recruitment rate. Eventually, there was a net significant decline in population density, observed for all major tree species, including Scots pine, pedunculate oak, silver and downy birch, and black alder. As mortality processes affected mainly smaller trees, there was also a significant deterioration of the general demographic status of most important tree species. This effect was shown by the change of the overall shape of diameter distributions over the study period: from reverse J−shaped to flat curves running nearly parallel to X−axis. The values of recruitment rates were markedly lower, and the values of mortality rates – significantly higher, than analogous values characterizing comparable forests (e.g., those obtained for the natural stands of Białowieża National Park). Low recruitment rates, as obtained for Kampinos stands, suggest that presently, in the local, Scots pine−dominated, old−growth stands, the general conditions for forest regeneration and for maintaining a long−term demographic stability are unfavorable. Most probably, the regeneration of this type of forest has an episodic, ‘wave−like’ character and corresponds to the ‘catastrophic’ model, according to which the successful regeneration of current dominants (especially Scots pine, silver and downy birch, black alder) must be preceded by a stand−initiating (stand−replacing) disturbance, leading to total or partial, but heavy, destruction of the currently existing stand. At the moment, it would be difficult to predict, however, if and when such a disturbance will affect the stands under investigation. Thus, we predict that in the nearest future at least, the state of overall demographic unbalance will continue or even increase.
    Źródło:
    Sylwan; 2020, 164, 06; 443-453
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zagrożone gatunki drzew Białowieskiego Parku Narodowego (Rezerwat Ścisły)
    Threatened tree species of the Bialowieza National Park (the Strict Reserve)
    Autorzy:
    Brzeziecki, B.
    Keczyński, A.
    Zajączkowski, J.
    Drozdowski, S.
    Gawron, L.
    Buraczyk, W.
    Bielak, K.
    Szeligowski, H.
    Dzwonkowski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1007075.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    hodowla lasu
    Bialowieski Park Narodowy
    rezerwaty scisle
    Obreb Ochronny Orlowka
    stale powierzchnie obserwacyjne
    sklad gatunkowy
    drzewa lesne
    grab
    lipa
    swierk
    olsza
    brzoza
    dab
    sosna
    jesion
    klon
    wiaz
    topola osika
    zageszczenie populacji
    liczebnosc
    struktura grubosci
    gatunki dominujace
    gatunki zagrozone
    diameter distribution
    dynamic status
    large−scale inventory
    long−term trend
    natural forest
    permanent plot
    population density
    population dynamics
    strict protection
    Opis:
    An assessment of the current dynamic status of tree species occurring in the Strict Reserve of the Białowieża National Park is presented. On the basis of long−term trends and analysis of large−scale inventory data, the three major groups of trees are distinguished: 1) ‘safe’ group, containing hornbeam and lime, 2) ‘presently safe, but declining in a long−term run’ group, involving spruce, birch and alder, and 3) ‘threatened and highly threatened’ group, consisting of oak, pine, ash, maple, elm and aspen.
    Źródło:
    Sylwan; 2012, 156, 04; 252-261
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Changes in the structure of tree stands on bog habitats in the Bialowieza forest
    Autorzy:
    Czerepko, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/38483.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    structural change
    tree stand
    bog habitat
    Bialowieza Forest
    bog forest
    permanent plot
    plant succession
    stand structure
    Opis:
    The analyses of 4 permanent study plots located in the Białowieża forest (NE Poland, at 52º43´ N, 23º50´ E) were carried out 4 times, first time in 1973 or 1974 and next in 1985, 1998, 2008. The paper presents the results of a long–term study on natural forest dynamics in two forest communities: raised-bog pine forest of the association Ledo-Sphagnetum magellanici Sukopp 1959 em. Neuhäusl 1969 and transitional bogs represented by the boreal spruce forest Sphagno girgensohnii-Piceetum Polak. 1962. On each measurement date the DBH of all trees were recognized. At the same time, stems of shrub species as well as tree species with the height lower than 1.3 m were counted within the experimental areas. During the study period the structure of stands changed significantly. The major change observed on raised bog sites was an increase in numbers of Betula spp., Picea abies (L.) H. Karst. and Quercus robur L. After 34th-year of observations the boreal spruce forest stand partly passed the terminal phase and regenerated. New species occurred in the stands, especially in their lower layer, are typical for oak-lime-hornbeam forest, such as e.g. Carpinus betulus L., Q. robur, Acer platanoides L. Rapid development of Corylus avellana L. was also observed. During last decades, the decrease in the number of Pinus sylvestris L. trees has been observed. The results of analyses of stand data in four research periods show that the wetland habitat of the Białowieża forest has been a subject to the processes of succession conditioned by environmental changes such as desiccation through lowering of the water table as well as climatic changes entailing inter alia an increase of the air temperature and a decrease of precipitation.
    Źródło:
    Folia Forestalia Polonica. Series A . Forestry; 2010, 52, 1
    0071-6677
    Pojawia się w:
    Folia Forestalia Polonica. Series A . Forestry
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wieloletnia dynamika starodrzewów w zagospodarowanej części Puszczy Białowieskiej: gatunki ekspansywne i ustępujące
    Long-term dynamics of old-growth stands in the managed part of the Bialowieza Forest: increasing and declining tree species
    Autorzy:
    Drozdowski, S.
    Brzeziecki, B.
    Żybura, H.
    Żybura, B.
    Gawron, L.
    Buraczyk, W.
    Zajączkowski, J.
    Bolibok, L.
    Szeligowski, H.
    Bielak, K.
    Widawska, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/1008501.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    Puszcza Bialowieska
    starodrzew
    dynamika drzewostanu
    drzewa lesne
    swierk
    grab
    jesion
    olsza
    dab
    lipa
    brzoza
    klon
    sosna
    wiaz
    zageszczenie drzew
    piersnicowe pole przekroju
    piersnice drzew
    gatunki ekspansywne
    gatunki ustepujace
    stale powierzchnie obserwacyjne
    badania dlugoterminowe
    old−growth forest
    permanent plot
    long−term trend
    population density
    population dynamics
    tree species
    Opis:
    In the paper, an assessment of tree population dynamics in the old−growth stands of the managed part of the Białowieża Forest is presented. Data from five permanent sample plots with a total size of 9.3 ha and six inventories that cover the period 1949−2006, were used. Depending on the dynamic status, determined on the basis of changes in a number of individuals per hectare, basal area and quadratic mean diameter, three major groups of tree species were distinguished: 1) an increasing group, containing only hornbeam and lime; 2) a stable group, involving alder and spruce and 3) a declining group consisting of oak, ash, maple, pine, birch, elm and aspen.
    Źródło:
    Sylwan; 2012, 156, 09; 663-671
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Changes in plant species composition in abandoned and restored limestone grasslands - the effects of tree and shrub cutting
    Autorzy:
    Dzwonko, Z
    Loster, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/57086.pdf
    Data publikacji:
    2008
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    cutting
    Polska
    grassland
    secondary succession
    restoration
    species diversity
    species composition
    tree
    composition change
    plant species
    shrub
    time series
    botany
    permanent plot
    Opis:
    Abandoned semi-natural limestone grasslands are often overgrown by shrubs and trees. Little is know if and to what extant xerothermic limestone grasslands can be restored by tree cutting. This was tested in a 12-year experiment after the clearing of a 35-year-old secondary pine wood developed on unmanaged grassland in the close proximity of not overgrown old grassland. After 12 years, there were no significant differences in the number of field layer species on the plots in the old and restored grasslands. But over this period the number of meadow species increased in all sites, while the number of xerothermic calcareous species increased significantly only in the old grassland plots. The developing shrub layer negatively influenced the number of nitrophilous and ruderal species in grasslands restored in the former close and open woods, and the number of all species, including the number of non-tufted perennials and perennials with vegetative spread, in the former open wood. The number of meadow species increased in years with higher precipitation in late spring and early summer. The obtained results suggest that in overgrowing grasslands shrubs and trees should be cut every few years, before their covers increase to about 30%. However, this treatment alone will not stop the changes to communities with dominance of tall and vegetatively spreading grasses and forbs. Cutting trees and shrubs in sites where most grassland species have already vanished, without additional managements supporting their dispersal, seedling recruitment and development, is not sufficient to restore limestone grasslands rich in xerothermic species.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2008, 77, 1
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Impact of weather on dynamics of plant functional groups in an abandoned limestone grassland
    Autorzy:
    Dzwonko, Z.
    Loster, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/58030.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    weather impact
    climate condition
    plant-weather relation
    dynamics
    plant functional group
    abandoned grassland
    limestone grassland
    permanent plot
    secondary succession
    Polska
    Opis:
    We examined to what extend the rate and direction of changes in unmanaged grassland depend on fluctuations in climatic conditions. Vegetation data from permanent plots in a semi-natural grassland in southern Poland collected over 12 years were used. Relations between weather variables, time, and the cover of 41 more frequent species and 14 plant functional groups were analysed. The greatest effect on the dynamics of species and functional groups had precipitation in spring and/or early summer, particularly in the current year. The majority of plant groups were significantly affected also by the temperature in spring and early summer in one of the three previous years. During 12 years, the cover of annuals and biennials, short plants, and plants with small leaves decreased, while the cover of taller plants, plants with larger leaves, and with vegetative spread increased. The analyses suggest that these successional changes were not directly associated with climatic conditions but were affected by them indirectly through interspecific competition. The fluctuations in climatic conditions, chiefly precipitation, had a significant effect on both the composition and the rate of changes in abandoned grassland. The increase in the cover of tall perennial species with broad leaves hindered succession towards woodland despite of the presence of woods in the closed vicinity. It can be expected that during drier periods colonisation of grassland by later successional species could be easier.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2011, 80, 4
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Theoretical problems of exercising of land rights in Ukraine
    Autorzy:
    Fedchyshyn, Dmytro
    Powiązania:
    https://bibliotekanauki.pl/articles/1199365.pdf
    Data publikacji:
    2018-11-30
    Wydawca:
    Uniwersytet Gdański. Instytut Geografii
    Tematy:
    land rights
    subjective right
    exercising of land right
    limits of rights
    land plot
    intended purpose of land
    land ownership
    permanent use of land
    Opis:
    The article is devoted to theoretical issues related to the exercising of land rights. The author analyzed the concept, content and limits of the exercising of land rights. Also the relation of concepts “exercising of the rights” and “realization of the rights” is carried out. The content of the concept of “the exercise of land rights” is examined. The category “limits of realization of the land rights” is investigated. The views of scientists in the sphere of land law, which contained term of “intended purpose of a land plot”, are analyzed. It is considered as one of the main characteristics of each land plot.
    Źródło:
    Journal of Geography, Politics and Society; 2018, 8, 4; 37-41
    2084-0497
    2451-2249
    Pojawia się w:
    Journal of Geography, Politics and Society
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zmiany składu gatunkowego i struktury drzewostanów w Roztoczańskim Parku Narodowym w okresie 2007-2017
    Changes in the species composition and structure of forest stands in the Roztocze National Park in the years 2007-2017
    Autorzy:
    Łukaszewicz, J.
    Zajączkowski, G.
    Gil, W.
    Tittenbrun, A.
    Radliński, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/979113.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    forest dynamics
    species composition
    dbh distribution
    permanent plot
    strict protection
    Opis:
    The aim of the study is to analyze changes in the species composition and in the diameter structure of the main forest−building species in the Roztocze National Park (central−eastern Poland). The research was carried out on 315 permanent monitoring plots. The range of collected data included: type of protection (strict and active protection), forest site type, tree species and their dbh (>7 cm over bark). Measurements and observations were made in 2007 and repeated in 2017. There was a significant reduction in the number of all tree species, except of beech Fagus sylvatica, regardless the protection status. Despite this, the basal area for the strict and active protection zone was similar both in 2007 (37.77 and 36.39 m2/ha, respectively) and 2017 (37.17 and 37.85 m2/ha, respectively). In the whole park, the number of large trees (mainly beeches) with high individual basal area increased, while the number of young generations of all species decreased. In the strict protection zone, the admixture species (decrease by 27.3%), as well as hornbeam Carpinus betulus (decrease by 22.8%), are not particularly competitive with beech. A similar tendency, although mitigated by active silvicultural treatments, was also observed in the active protection zone, in which admixture species have lost 24.8% while hornbeam 16.2%. In the strict protection area, there was a significant reduction in the number of fir Abies alba (by 14%). In the active protection zone fir increased its range and basal area, and maintains its population practically unchanged. There was also a decrease in the number of young generations, as evidenced by changes in the frequency in the 7−16 cm dbh class. The highest level of reduction in this class was found for pine Pinus sylvestris (by 64.8%), rare species (40.4%), hornbeam (31.2%), oak Quercus robur (26.6%), and spruce Picea abies (20.5%). Only beech increased the abundance in this class (by 1.4%) as well as in the next 17−26 cm class (even by 14.2%). The presented significant changes in the species composition and structure of basal area of the stands in the Roztocze National Park that occurred in the 10−year period, indicate a significant role of tending cuts in maintaining proper species composition, appropriate diameter structure of stands, their stability of natural richness and high level of diversity of forest ecosystems.
    Źródło:
    Sylwan; 2020, 164, 08; 683-694
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pomiar zapasu grubizny z wykorzystaniem zdjęć lotniczych
    Inventory of merchantable timber volume using aerial photography
    Autorzy:
    Miścicki, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1012035.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    inwentaryzacja
    zapas grubizny
    drzewostany
    lesnictwo
    powierzchnie probne
    zdjecia lotnicze
    pomiary
    growing stock
    aerial photography
    inventory
    permanent sample plot
    airphoto sample plot
    two−phase
    method
    Opis:
    Inventory of the growing stock in the territory of the Milicz Forest District was made using the combined, two−phase method. 1980 sample plots were measured on aerial photographs that constituted Phase I of the inventory. Phase II sampling consisted of 267 ground (permanent) plots and corresponding airphoto plots depending on their location in the photograph. In the airphoto sample plots, the following characteristics were measured (or controlled): tree height and age, degree of crown cover, species composition. Taking into consideration the relationship between the results of standing volume measurements on ground sample plots and stand characteristics on airphotos, the growing stock in age sub−classes and in the entire Forest District was calculated. Using aerial photography in forest survey and growing stock inventory, the cost of forest management planning operations is likely to be comparable to the cost of such operations performed in the traditional way.
    Źródło:
    Sylwan; 2009, 153, 06; 373-385
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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