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Wyszukujesz frazę "development structure" wg kryterium: Temat

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    Tytuł:
    The influence of shoot harvesting on the age structure of Convallaria majalis L. populations
    Autorzy:
    Kosinski, I
    Powiązania:
    https://bibliotekanauki.pl/articles/56635.pdf
    Data publikacji:
    2003
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    medicinal plant
    Convallaria majalis
    Convallaria maialis zob.Convallaria majalis
    age structure
    development stage
    shoot cutting
    Opis:
    This paper presents the structure of developmental stages and the age structure of Convallaria majalis L. populations. The investigation material consisted of individuals and modules from populations in Betulo-Quercetum, Fago-Quercetum, Melico-Fagetum and Tilio-Carpinetum, in which the leaves and inflorescence of C. majalis were cut annually over a period of three years. Fifty percent of the C. majalis regional population consisted of mature modules, 20% of juvenile modules, 25% of senile modules and a very small percentage of generative modules. In populations of Fago-Quercetum there are four times more senile modules than juvenile modules, while in Melico-Fagetum the percentage of juvenile modules is four times more numerous than the percentage of senile modules. The average age of modules is 4.7±3.8 years. Three year old individuals dominate in the population, while 10 year or older individuals are very rare. In the population disturbed by the three raw material collections, the percentage of juvenile modules was decreased by 50% and the percentage of generative modules was nonexistent. As a result, the average module age is higher than in the undisturbed population. Cutting leaves and inflorescence is an important factor in limiting the recruitment of juvenile modules. The growth of individuals in the disturbed population occurs among older modules, which were able to reproduce before the disturbance occurred. Young individuals (three to four years old) are less numerous in the disturbed population, and the majority of individuals are three to six years old.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2003, 72, 1
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of water conditions on the phenology and age structure of Luronium natans [L.] Raf. populations
    Autorzy:
    Szmeja, J
    Bazydlo, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/56879.pdf
    Data publikacji:
    2005
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    development stage
    water condition
    Luronium natans
    age structure
    European endemic plant
    aquatic plant
    phenology
    population
    Opis:
    The study presents the results of the analysis of development stages of Luronium natans (L.) Raf. depending on water conditions (pH, light, total nitrogen, total phosphorus, organic carbon) in 21 populations in north-western Poland. The fractions of seedlings, juvenile, mature and generative stems, as well as the course of phenological phenomena were determined. Seedlings are sparse and can be found from May to July. Most of them occur in waters ranging from slightly acid to neutral (pH 6.0-7.0) with TP concentrations of 10-20 µg dm-3, TN concentrations < 1.0 mg dm-3 and DOC concentrations of 3.5-5.0 mg dm-3, on a mineral (5-10% OC) and fairly well lit (31-40% PAR) substrate. The generative phase lasts from May to October. The flowering period is between August and mid-September. Only 35.2±9.4% of flowering stems produce fruits. The plant flowers abundantly in waters with total nitrogen concentrations > 1.2 mg dm-3, that is above the level of TN concentrations most favourable to seedlings and both juvenile and mature individuals. TP and DOC concentrations, and light intensity (PAR) do not influence the size of the generative stems fraction in populations. However, sediment structure is of importance in this respect: about 62.9% of stems flower and fruit on a mineral substrate (< 1% OC), whereas only 17.4% do so on an organic one. The results of this study may be useful in the conservation of this endangered European endemic species.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2005, 74, 3
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The structure of the ovule of Sida hermaphrodita (L.) Rusby after pollination
    Struktura anatomiczna zalążka Sida hermaphrodita (L.) Rusby po zapyleniu
    Autorzy:
    Chudzik, B.
    Szczuka, E.
    Domaciuk, M.
    Pavlov, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/26672.pdf
    Data publikacji:
    2010
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    ovule
    ovule structure
    Sida hermaphrodita
    pollination
    flower
    energetic plant
    arabinogalactan protein
    Malvaceae
    protein distribution
    development stage
    Opis:
    The anatomical structure and the distribution of arabinogalactan proteins were investigated in the ovule of an energetic plant Sida hermaphrodita (L.) Rusby after pollination. Material was collected from an experimental field of the University of Life Sciences in Lublin (Felin). After embedding for immunoflurescence, semi-thin sections were stained with toluidine blue or incubated with JIM 13 or MAC 207 monoclonal antibodies for immunolabeling of arabinogalactan proteins. The structure of the ovule showed some differences in comparison to other representatives of the Malvaceae family. Conversely, the distribution of arabinogalactan proteins did not differ significantly from their distribution in the ovules of other angiosperms at the investigated stage of development.
    Źródło:
    Acta Agrobotanica; 2010, 63, 2
    0065-0951
    2300-357X
    Pojawia się w:
    Acta Agrobotanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structure and dynamics of selected stands of primeval character in the Pieniny National Park
    Autorzy:
    Jaworski, A
    Podlaski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/41477.pdf
    Data publikacji:
    2007
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    Pieniny National Park
    forest
    species composition
    structure
    stand
    development stage
    fir
    Abies alba
    beech
    Fagus sylvatica
    plant regression
    Opis:
    The purpose of this study was to determine changes which occurred during 23 years (1974–1997) in four stands in respect of species composition, structure, developmental stages and phases. In 1997 the Walusiowka stand represented the growing up stage, phase of a multistory structure, and during the study period its volume decreased from 698 to 676 m3/ha.The Przełęcz Sosnow stand was in the growing up stage, phase of a little diversified storied structure and regeneration, and its volume decreased from 696 to 622 m3/ha.The Grodek stand during the entire study period was in the growing up stage, phase of the selection forest structure and regeneration, and its volume increased from 529 to 585 m3/ha.The Facimiech stand in 1997 was in the optimum stage, phase of aging and regeneration, and its volume decreased from 688 to 661 m3/ha.During 1974–1997 the percentage of fir (Abies alba) considerably decreased in three stands (Walusiowka from 46 to 33%, Przełęcz Sosnow from 58 to 36%, Grodek from 42 to 24%).The Facimiech stand was almost a pure fir stand during the entire control period. In the Przełęcz Sosnow stand, due to a rapid mortality of fir and presence of vital trees of beech (Fagus sylvatica) of the growing up and optimum growth generations, the break up stage did not take place but the growing up stage had developed, which indicated the disturbance of the natural cycle of the primeval forest described by Korpel’. A scarce presence of fir upgrowth and prevalence of beech in stands composed of these two species permits to suppose that fir will be retreating in favor of beech.
    Źródło:
    Dendrobiology; 2007, 58; 25-41
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Budowa, struktura i dynamika naturalnych górnoreglowych borów świerkowych w dolinie Rybiego Potoku (Tatrzański Park Narodowy) w okresie kontrolnym 1990-2001
    Structure and dynamics of natural spruce stands in the upper montane zone in the Rybi Potok Valley [the Tatra National Park] in the years 1990-2001
    Autorzy:
    Karczmarski, J.
    Zygarowicz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1015898.pdf
    Data publikacji:
    2007
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    dynamika drzewostanu
    sklad gatunkowy
    Tatrzanski Park Narodowy
    drzewostany swierkowe
    lesnictwo
    proces dorastania
    struktura drzewostanu
    zasobnosc drzewostanu
    Dolina Rybiego Potoku
    budowa drzewostanu
    regiel gorny
    proces ubywania
    drzewostany naturalne
    przyrost drzewostanu
    stand structure
    stand dynamics
    development stage
    primeval forests
    spruce
    Opis:
    The paper presents changes (in 1990−2001) in species composition, growing stock, dbh structure, height and storey structure, increment, density of dead trees and regeneration of primeval spruce forests situated in the Rybi Potok Valley in the Tatra National Park on the example of two permanent study sites. The stands discussed in the paper (in comparison with other stands at a similar altitudinal zone in the Polish Carpathians) feature high productivity expressed in annual volume increment amounting to 5.3−5.6 m3/ha and high stability.
    Źródło:
    Sylwan; 2007, 151, 12; 3-20
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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