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    Wyświetlanie 1-9 z 9
    Tytuł:
    Diversity of polyisoprenoids in ten Okinawan mangroves
    Autorzy:
    Basyuni, M.
    Sagami, H.
    Baba, S.
    Iwasaki, H.
    Oku, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/41117.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    diversity
    polyisoprenoid
    Okinawan mangrove
    mangrove
    root
    leaf
    polyprenol
    tree
    Opis:
    The distribution and occurrence of polyisoprenoids (dolichols and polyprenols) in the leaves and roots of nine true Okinawan mangroves and the leaves of one associate mangrove were analyzed using two-dimensional thin layer chromatography. In the leaves, the distribution of three types (I, II, and III) of polyprenols and dolichols were detected. (I) The predominance of dolichols over polyprenols (more than 90%) was observed in Avicennia marina, Bruguiera gymnorrhiza, B. gymnorrhiza (yellow leaves), and Rhizophora stylosa. (II) The occurrence of both polyprenols and dolichols is observed in Excoecaria agallocha, Kandelia obovata, K. obovata (yellow leaves), Lumnitzera racemosa, Pemphis acidula, and Sonneratia alba. (III) The predominance of polyprenols over dolichols (more than 90%) is observed in Heritiera littoralis and Hibiscus tiliaceus. However, in the roots, a type-I distribution was observed in A. marina, B. gymnorrhiza, E. agallocha, H. littoralis and S. alba. A type-II distribution was observed in K. obovata, L. racemosa, P. acidula, and R. stylosa with no type-III distribution. The chain-length distribution of dolichols in the leaves and roots was C50–C140 and C60–C120, respectively. A similar chain-length distribution of polyprenols of C45–C140 and C65–C85 was detected in the leaves and roots respectively. Taken together, sixteen out of twenty-one tissues indicated that dolichols are more abundant than polyprenols in both leaves and roots. The present study is the first to clarify the diversity of polyisoprenoids in both the leaves and roots of mangrove, suggesting the chemotaxonomic significance of polyisoprenoids in the mangrove tree species.
    Źródło:
    Dendrobiology; 2016, 75
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Genetic diversity and mating system of Scots pine plus trees
    Autorzy:
    Wasielewska, M
    Klemm, M.
    Burczyk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/41784.pdf
    Data publikacji:
    2005
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    Scotch pine
    Pinus sylvestris
    genetic diversity
    mating system
    genetic variation
    plus tree
    plant quality
    tree
    Opis:
    We have investigated genetic diversity and the mating system of Scots pine plus trees from the Tuchola Forests – Poland, using allozymes as genetic markers. The studied plus trees possess high genetic diversity (expected heterozygosity He = 0.427) and low inbreeding (Wright’s index F = –0.028), which is comparable to Scots pine trees observed in other studies in natural populations and seed orchards. The mating system analyses revealed that almost all offspring produced by the plus trees were due to outcrossing (tm = 0.983), with no apparent bi-parental inbreeding. The estimate of correlation of paternity indicated that each of mother trees is pollinated on average by a relatively large number of effective males (Nep = 30.3). The observed genetic diversity and mating system patterns indicate that the seeds produced by the studied plus trees possess high genetic variation needed in reforestation processes.
    Źródło:
    Dendrobiology; 2005, 53; 57-62
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tree diversity and management of Village Common Forests in Bandarban
    Autorzy:
    Kamrul, K.I.
    Jashimuddin, J.
    Hossain, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/10013.pdf
    Data publikacji:
    2017
    Wydawca:
    Fundacja na Rzecz Młodych Naukowców
    Tematy:
    tree
    species diversity
    management
    biodiversity
    Village Common Forests
    Bandarban district
    Bangladesh
    Opis:
    Village Common Forests (VCF) are used sustainably for water source conservation, livelihoods and other biomass needs ofethnic communities in the hilly areas of Bangladesh. The current forest degradation rate warrants the importance and potentiality of VCF for sustainable natural resources management. This study was conducted in two VCF of Lama and RumaUpazila at Chimbuk hill range in Bandarban district to explore the indigenous management techniques and tree species diversity. To identify tree species diversity, eighteen plots (9 plots from each VCF) were selected at different hill position (top, middle and bottom) by stratified random sampling method with the dimension of 20m×20m per plot. Shiner-winner and Simpson index were used to calculate the tree species diversity. According to the analyses, it was found that diversity was higher in top of the hill, but species density (stem/ha) was higher in the valley. It was also found that 23000 seedlings/ha regenerated naturally and among the 31 identified families, Moraceae was dominant where the density was 354 stems/ha with basal area 52.63 m2/ha. The dominant species were Schleicher oleosaand Anisopterascaphula and important non-timber species were Melocannabaccifera and Calamusgurubagrowing abundantly in the study areas. It was observed that the VCF were managed by ethnic Mro community with two different committees (customary and executive) who made some rules for natural forest conservation. This management practice is not only conserving hill forests, but also helping to improve degraded forest and create new habitats for biodiversity in the study area.
    Źródło:
    Environment, Earth and Ecology; 2017, 1, 2
    2543-9774
    2451-4225
    Pojawia się w:
    Environment, Earth and Ecology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zróżnicowanie florystyczne wybranych alei gmin: Namysłów, Świerczów oraz Domaszowice na Dolnym Śląsku
    Floristic Diversity of Selected Tree Alleys in Lower Silesian Communes: Namysłów, Świerczów and Domaszowice
    Autorzy:
    Tomaszewska, K.
    Bogdańska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1188063.pdf
    Data publikacji:
    2011
    Wydawca:
    Uniwersytet Przyrodniczy we Wrocławiu
    Tematy:
    zróżnicowanie
    flora
    Dolny Śląsk
    aleja
    drzewo
    floristic diversity
    alley
    tree
    Lower Silesia
    Opis:
    One of the functions of roadside tree planting is biodiversity protection. The analysis often alleys from Lower Silesia region confirmed their floristic wealth. Nineteen tree species and five shrub species were recognized. Planted species forming alleys are predominant among sites was different, but two alleys attract an attention with their compositional arrangement: chestnut lane in Staroscin ended with a group of old, monumental oaks surrounding a historic figure, and two-part lane in Biestrzykowice. The cherry alley in Dąbrowa Namysłowska should be covered by a special care since there are less and less alleys of this type. Floristic diversity may be seen especially clearly in the case of roadside herbaceous plants. In all analysed sites 123 species of herbaceous plant belonging to 32 families were recognised. The number of individuals from particular families was varied. The most abundant were aster family (Asteraceae), blue grass family (Poaceae) and pea family (Fabaceae). High diversity is also confirmed by the fact that only two species were present in all ten alleys, while as much as 49% of species were observed once only. Among recognized species, the predominant are those characteristic for roadsides, however also another ones from neighbouring areas may be found. The alleys may also be a place of protected species occurrence bear's-garlic ( Allium ursinum) or ones characteristic for quite other kinds of sites triangle pink (Dianthus deltoides).
    Źródło:
    Architektura Krajobrazu; 2011, 1; 27-31
    1641-5159
    Pojawia się w:
    Architektura Krajobrazu
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Macrofungi of wooded patches in the agricultural landscape. I. Species diversity
    Grzyby wielkoowocnikowe zadrzewien srodpolnych w krajobrazie rolniczym. I. Roznorodnosc gatunkowa
    Autorzy:
    Kujawa, A
    Powiązania:
    https://bibliotekanauki.pl/articles/67311.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    macrofungi
    wooded patch
    agricultural landscape
    species diversity
    tree
    nature conservation
    fungi community
    Opis:
    This article begins a four-part series, which presents the results of mycological research carried out in 2000-2007 in the agricultural landscape of the General Dezydery Chłapowski Landscape Park. This part includes description of the study area and field research methods, as well as a list and localities of 617 macrofungal taxa recorded in the Park. The next parts of this series will deal with: species that are rare, protected by law or recorded for the first time in Poland; the role of wooded patches for preservation of fungal diversity in the agricultural landscape; and changes in species diversity and structure of fungal communities in forest communities under strong human pressure.
    Powyższy artykuł jest pierwszym z serii czterech artykułów prezentujących wyniki badań nad grzybami wielkoowocnikowymi przeprowadzonych w krajobrazie rolniczym Wielkopolski. W latach 2000-2007 badano różnorodność gatunkową grzybów wielkoowocnikowych zadrzewień śródpolnych, parków wiejskich i lasów gospodarczych w Parku Krajobrazowym im. gen. Dezyderego Chłapowskiego. Przez trzy lata badania prowadzono na 50 stałych powierzchniach. Przez cały okres badań zbierano też grzyby poza stałymi powierzchniami. Stwierdzono występowanie 569 taksonów macromycetes, a po uwzględnieniu nielicznych danych z literatury liczba znanych taksonów z tego terenu wynosi 615. W pierwszym artykule zawarto opis terenu badań oraz wykaz gatunków i ich lokalizację. Kolejne artykuły będą dotyczyły: gatunków chronionych, rzadkich oraz stwierdzonych w Polsce po raz pierwszy,• roli zbiorowisk drzewiastych w ochronie różnorodności gatunkowej grzybów wielkoowoc• nikowych w krajobrazie rolniczym, zmian w różnorodności gatunkowej i strukturze zbiorowisk grzybów w zbiorowiskach le• śnych będących pod wpływem silnej antropopresji.
    Źródło:
    Acta Mycologica; 2009, 44, 1; 49-75
    0001-625X
    2353-074X
    Pojawia się w:
    Acta Mycologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    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:
    Geographical pattern of haplotypic variation in Austrian native stands of Picea abies
    Autorzy:
    Mengl, M
    Geburek, T.
    Schueler, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/41567.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    international conference
    Europe
    forest ecosystem
    plant breeding
    tree
    Norway spruce
    Picea abies
    mitochondrial DNA
    biogeography
    genetic diversity
    haplotypic variation
    native stand
    Austria
    tree species
    Opis:
    In the present study we analysed the mitochondrial intraspecific variation in natural populations of Norway spruce. We used the second intron of the nad1 gene, which contains two polymorphic short tandem repeats. Due to the maternal inheritance of mitochondrial DNA in Norway spruce, the spatial distribution of haplotype DNA allows insights into seed dispersal and artificial seed transfer. A total of 504 trees distributed all over Austria were genotyped, and 9 different haplotypes could be found. A geographical map of the haplotype variation pattern of Picea abies is presented.
    Źródło:
    Dendrobiology; 2009, 61 Supplement
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Implication of forest zonation on tree species composition, diversity and structure in Mabira Forest, Uganda
    Autorzy:
    Weldemariam, E.C.
    Jakisa, E.S.
    Ahebwe, D.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/9997.pdf
    Data publikacji:
    2017
    Wydawca:
    Fundacja na Rzecz Młodych Naukowców
    Tematy:
    forest zonation
    management zone
    tree
    woody species
    plant species
    species composition
    species diversity
    species structure
    Mabira Forest Reserve
    Uganda
    Opis:
    The study aimed to investigate effectiveness of forest management zoning in conserving biodiversity of Mabira forest reserve. The study sites buffer, production, and strict nature reserve management zones were purposively selected. This was undertaken through investigating woody species diversity, composition and structure. A total of 60 sampling plots with a size of 20 m x10 m were used to collect vegetation data. Variables such as woody plant species identification and counts as well as diameter at breast height (DBH) of trees were done. The result depicted a total of 65 woody species; 39 in buffer, 19 in productions and 37 in strict nature reserve. Of these, only 9 trees species were found common to all zones and their Sorensen similarity coefficient was 0.2213. The population structure of the buffer and strict nature reserve zones was found to be a J - shape pattern, whereas the production zone shown an inverted J-shape pattern. Higher woody species diversity was depicted in the buffer and strict nature zones with (H’=2. 73512) and (H’=2. 68412) respectively, and lower in a production zone (H’=1. 63628). The evenness index value of a buffer zone was (J =0. 746574), strict nature (J= 0.743335) and production (J=0. 555719). The production zone had shown higher IVI values followed by buffer and strict nature reserve zone. The most important woody species identified based on their IVI value were Broussonetia papyrifera (Production), Acalypha neptunica (Buffer), Funtumia Elastica (strict nature reserve). The existing forest management is effective in conserving the biodiversity of the forest reserve. Nevertheless, the production zone was still suffering from exploitation of the surrounding community, hence serve for protecting the remaining management zones from further human interference. Further investigation is also required on the adjacent community perceptions of the forest management zoning.
    Źródło:
    Environment, Earth and Ecology; 2017, 1, 1
    2543-9774
    2451-4225
    Pojawia się w:
    Environment, Earth and Ecology
    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
      Wyświetlanie 1-9 z 9

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