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    Wyświetlanie 1-8 z 8
    Tytuł:
    Tree species diversity and above-ground biomass of natural temperate forest: montane versus lowland forest
    Autorzy:
    Gazda, A.
    Miscicki, S.
    Chwistek, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/41218.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    tree
    plant species
    species diversity
    aboveground biomass
    temperate forest
    mountain forest
    lowland forest
    species richness
    Opis:
    We studied the relationship between tree-species diversity and the above-ground biomass on an example of two natural Polish forest with different altitiudinal range, plant species pool, vegetation and climatic conditions. The study sought to determine whether: (1) above-ground biomass in natural forests correlates with tree-species diversity irrespective of the kind of forest (montane or lowland), and (2) the relationship in question is negative, (3) the above-ground biomass is greater in montane forests than in lowland ones. Natural forests present in 1º Polish Gorce Mountains (montane forest) alongside comparable data for the 2º world-renowned lowland forest that is present in the Białowieża National Park. Data were collected within 558 sample plots (á 200-square-metre). The diameter at breast height of all trees with girths of or exceeding 12 cm was measured. To compute above-ground biomass we calculated dry masses for each tree on the basis of values for dbh and height, next we summed these values for all species present within each plot. The number of tree species on a plot ranged from only one (mainly in spruce stands) to six (in mixed deciduous lowland forest stands). The above-ground accumulated biomass ranged from 6 to 1155 (average 251±13) t ha–1 within the lowland forest, and from 2 to 849 (average 242±8) t ha–1 within the montane forest. We concluded that there was a humped-back shaped relationship between tree-species diversity and above-ground biomass in both lowland and montane natural forests.
    Źródło:
    Dendrobiology; 2015, 73
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The direct and indirect effect of fire on radial growth of Pinus koraiensis trees in a northern temperate forest of China
    Autorzy:
    Gao, Lushuang
    Zhang, Chunyu
    Zhao, Xiuhai
    Zhang, Li
    Powiązania:
    https://bibliotekanauki.pl/articles/956863.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    burned trees
    growth pattern
    competition
    climate
    korean pine
    Opis:
    The long-term effects of fire on the radial growth of Korean pines (Pinus koraiensis) in Changbai Mountain is poorly understood. In order to quantify the impact of fire on the radial growth of Korean pines, we measured ring widths and developed two tree-ring chronologies from 21 burned Korean pine trees that were damaged by fire in 1857 as well as 30 control trees in the Changbai Mountain Nature Reserve, China. As expected, the growth rates of the burned trees were slower than those of the control trees in the first five years following the fire. However, beginning six years after the fire, the growth of the burned trees increased considerably, and this period of increased growth lasted 13 years, with moderate growth occurring throughout the 1866 to 1871 period. A difference in growth rates between burned and control tress was also observed for the 20 years since temperatures began markedly increasing in 1980. Burned trees tended to respond negatively to monthly minimum temperature, precipitation, and vapor pressure deficits (VPD), whereas the positive relationship between those factors and radial growth of control trees became stronger. In addition, the significantly negative effect of competition on radial growth was only observed among burned trees. These results demonstrated that the negative and direct effect of damage to physiological plant processes by fire only affected the years shortly after a fire occurred and then became obscured by its indirect effects, such as differential responses to climate and competition, which did persist for a long time. The indirect effect on radial growth over time could be explained by the variability in the relative strength of climatic responses and competition caused by fire.
    Źródło:
    Dendrobiology; 2017, 78; 111-123
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Efficiency of different forest types in carbon storage depends on their internal structure
    Autorzy:
    Gheorghe, I.F.
    Biris, I.A.
    Valcu, C.-M.
    Powiązania:
    https://bibliotekanauki.pl/articles/57973.pdf
    Data publikacji:
    2010
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    forest vegetation
    efficiency
    forest type
    carbon storage
    internal structure
    temperate forest
    productivity
    Opis:
    Forest vegetation is a key factor in the maintenance of global carbon cycle balance under the present climate change conditions. Forest ecosystems are both buffers against extreme climatic events accompanying climate change and carbon sinks diminishing the environmental impact of anthropogenic greenhouse gas emissions. We investigated the influence of stand structure and site characteristics on the productivity and carbon storage capacity of temperate forest types. Predictors of species productivity were parameters such as stand density, age, height, average diameter and wood density. Morus alba (L.) was more productive than average both in terms of annual volume increment and annual biomass gain, while Quercus sessiliflora (Matt.) Lieb. and Quercus frainetto (Ten.) were significantly less productive than average. Differences in stand productivity were explained by stand density, age, height, altitude, type of regeneration and species composition. Statistically significant differences were measured between the productivity of stands dominated by different woody species, with low productive stands dominated by slow growing species with high wood density like Quercus or Fagus, and highly productive stands rich in fast growing species with low wood density like Populus or Salix. Stands with different plant communities in the underlying herbaceous layer also tended to have different levels of productivity.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2010, 79, 4
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Similarity between seed bank and herb layer in a natural deciduous temperate lowland forest
    Autorzy:
    Wodkiewicz, M
    Kwiatkowska-Falinska, A.J.
    Powiązania:
    https://bibliotekanauki.pl/articles/56649.pdf
    Data publikacji:
    2010
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    similarity
    seed bank
    herb layer
    lowland forest
    Bialowieza Forest
    primeval forest
    oak-hornbeam forest
    seed extracting
    soil seed bank
    species dominance
    species similarity
    Opis:
    Forest seed banks mostly studied in managed forests proved to be small, species poor and not reflecting aboveground species composition. Yet studies conducted in undisturbed communities indicate a different seed bank characteristic. Therefore we aimed at describing soil seed bank in an undisturbed forest in a remnant of European lowland temperate forests, the Białowieża Forest. We compared similarity between the herb layer and seed bank, similarity of seed bank between different patches, and dominance structure of species in the herb layer and in the seed bank of two related oak-hornbeam communities. We report relatively high values of Sorensen species similarity index between herb layer and seed bank of both patches. This suggests higher species similarity of the herb layer and soil seed bank in natural, unmanaged forests represented by both plots than in fragmented communities influenced by man. Although there was a set of core seed bank species present at both plots, yielding high Sorensen species similarity index values, considerable differences between plots in seed bank size and dominance structure of species were found, indicating spatial variability of studied seed bank generated by edaphic conditions. Dominance structure of species in the herb layer was not reflected in the underlying seed bank. This stresses, that natural forest regeneration cannot rely only on the seed bank, although some forest species are capable of forming soil seed banks. While forest seed banks may not reflect vegetation composition of past successional stages, they may inform on history and land use of a specific plot.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2010, 79, 2; 157-166
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ekologia i biologia ptaków Puszczy Białowieskiej z perspektywy czterdziestoletnich badań
    Ecology and biology of birds in the Bialowieza Forest: a 40-year perspective
    Autorzy:
    Czeszczewik, D.
    Walankiewicz, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/1294404.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    lesnictwo
    Puszcza Bialowieska
    Bialowieski Park Narodowy
    fauna
    ptaki
    bogactwo gatunkowe
    ekologia zwierzat
    ptaki legowe
    zagrozenia zwierzat
    czynniki antropogeniczne
    Białowieża National Park
    temperate forests
    predation
    forest birds assembly
    forest management
    Opis:
    The aim of this study was to review the most important results from the last 40 years of intense ornithological research conducted in the Białowieża Forest. Furthermore, we discuss the threats that may destroy the unique ecology and characteristics of this forest. Studying the avifauna of the Białowieża Forest provides us with a good general knowledge about natural ecological conditions and relationships, which prevailed in temperate European forests in the past. The avifauna of the Białowieża Forest is characterized by features associated with primeval habitats such as the stability of communities over time, high species richness, relatively low densities, high proportion of hole-nesting birds, very high predation pressure and weak, insignificant competition interactions. This emphasizes the importance of predation, excess of nesting sites for cavity nesting birds, high abundance of food, especially for insectivorous species and fluctuation of bird population size due to rodent outbreaks (pulsed resources). The most severe threats for the avifauna of the Białowieża Forest are: rejuvenation of tree stands, removal of dead wood, fragmentation of old-growth stands, change of tree stand composition (reducing the proportion of some tree species). In order to expand our ecological knowledge about birds, we should keep the Białowieża Forest fully protected for years to come. The main priority should be the maintenance of natural processes changing the forest’s species composition.
    Źródło:
    Leśne Prace Badawcze; 2016, 77, 4
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Struktura naturalnego drzewostanu buczyny karpackiej w Tatrach na tle naturalnych buczyn z innych masywów Karpat
    Structure of natural stand of a carpathian beech forest in the Tatra mountains compared with natural beech stands from other parts of the Carpathian
    Autorzy:
    Szwagrzyk, J.
    Sułowski, W.
    Skrzydłowski, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1018691.pdf
    Data publikacji:
    2006
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    Tatry
    Karpaty
    lesnictwo
    drzewostany naturalne
    struktura drzewostanu
    buczyna karpacka
    canopy stratification
    diameter distribution
    height distribution
    mixed temperate forests
    natural stands
    Opis:
    The aim of this study was to compare the structure of newly found remnant of natural beech forest in Suchy Żleb in the Tatra mountains with the structure of natural tree stands in other parts of the Carpathians. In the sample plot of the size of 1 ha the stand basal area amounted to 36.7 m2; of that, 42.7% was beech, 37.4% silver fir, 19.8% Norway spruce, and 0.1% sycamore maple. In the units of volume silver fir was the most important tree in the stand (47%), while the share of beech was only 33%; the total wood volume of live trees was equal to 446.8 m3/ha. Tree number was equal to 442, among them 327 beeches, 73 silver firs and 41 Norway spruces. Number of snags was 26, and their volume 26.16 m3. Total amount of coarse woody debris was 159 m3 per hectare. Sub−canopy layer was dominated by beech, the middle layer of tree stand was a mixture of all three species, and the highest canopy layer consisted only of spruce and fir. The analyzed stand had biomass accumulation slightly below the average for the natural mixed beech forests of the Carpathians, probably because of selective tree cutting in the past. Because Suchy Żleb is the only remnant of natural stand in the montane zone of the Tatra mountains, it is very valuable as an object for comparisons with natural beech stands growing in other ranges of the Carpathians.
    Źródło:
    Sylwan; 2006, 150, 09; 3-15
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ dębu czerwonego Quercus rubra L. na populacje paproci w różnych typach fitocenoz leśnych
    Impact of northern red oak Quercus rubra L. on ferns populations in different forest phytocoenoses
    Autorzy:
    Zarzycki, W.
    Wilczek, Z.
    Woźnica, P.
    Folcik, L.
    Lewandowska, A.
    Gancarek, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/989730.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    ekologia lasu
    fitocenozy lesne
    las gradowy
    kwasna dabrowa
    buczyna
    drzewa lesne
    dab czerwony
    Quercus rubra
    allelopatia
    oddzialywanie na rosliny
    runo lesne
    paprocie
    wystepowanie
    populacje roslin
    competition
    interference
    allelopathy
    temperate forests
    biodiversity
    Opis:
    Northern red oak (Quercus rubra) is the most common alien tree species in Polish forests that is considered as an invasive one. It is native to North America. Negative impact of Q. rubra on natural habitats in Europe is well−known, but there is still a lack of information about correlations between red oak and individual species or groups of plants. Especially knowledge about impact of Q. rubra on fern communities is still unsatisfactory. The goal of research was to check if ferns could be neutral to the negative oak impact. In order to verify, populations of ferns occurring in patches of forests dominated by northern red oak and population from natural forests with the same abiotic conditions were compared. Moreover, quantitative relations between ferns and other herb species were analyzed. The research was carried out in southern Poland. Field surveys were conducted in 100 m² plots with domination of Q. rubra. Plots were settled in 3 different types of plant communities: mixed broadleaf forest, acidophilous oak forest and acidophilous beech forest. In the same types of plant communities, but without northern red oak, control plots were located. Control patch was settled in place with similar inclination, exposition, altitude and water regimes. For each surface list of all herb species with their percentage coverage and biometric measures of fern fronds were made. At maximum 50 specimens of each fern species were taken into account. Plots were located in areas of 3 geographical regions: the Śląskie Foothills, the Oświęcimska Basin and Śląska Upland. Results show that ferns in monocultures of the alien oak are bigger, more lush and their coverage is higher than in the control plots. What is more, coverage of other herb species and species diversity are significantly higher in control patches. It suggest that ferns are not sensitive to Q. rubra influence, so it can be concluded that they are competitive to other species which are sensitive to northern red oak impact.
    Źródło:
    Sylwan; 2015, 159, 08; 658-665
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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