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    Wyświetlanie 1-6 z 6
    Tytuł:
    Genetic variation of the relict and endangered population of Chamaedaphne calyculata (Ericaceae) in Poland
    Autorzy:
    Szczecinska, M
    Sawicki, J.
    Wasowicz, K.
    Holdynski, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/41179.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    plant species
    rare species
    Polska
    endangered population
    relict population
    genetic variation
    Chamaedaphne calyculata
    Ericaceae
    genetic diversity
    conservation
    geographic distribution
    Opis:
    Chamaedaphne calyculata is rare and endangerded species of Polish flora. The genetic variation within and among ten polish population of leatherleaf was analysed by ISSR and ISJ markers. The analysis revealed a total of 160loci with an average of 13.3 bands per primer. We expected a low level of genetic diversity of this narrowly distributed species in Poland, but our results indicate that Ch. calyculata revealed a high level of genetic diversity at species level (P=88.7%of polymorphic loci, AE=1.468, HE=0.290). At the population level, the variation of Ch. calyculata was significantly lower (P=27.6%, AE=1.140, HE=0.098). There was significant correlation between ecological properties (population size; number of flowering ramets) and genetic diversity parameters. Analysis of molecular variance showed that most of variation (62%) in Ch. calyculata occurred among population. Gene flow (Nm) between the ten studied populations, determined based on the GST index, was very low at 0.239. It indicated that the fragmentation and isolation of populations might result from specific evolutionary history of this plant and postglacial recolonization
    Źródło:
    Dendrobiology; 2009, 62; 23-33
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Intra-population variability of Picea abies from Zwierzyniec Lubelski and Blizyn (Poland)
    Autorzy:
    Kowalczyk, J
    Markiewicz, P.
    Matras, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/41233.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    international conference
    Europe
    forest ecosystem
    plant breeding
    tree
    Norway spruce
    Picea abies
    intrapopulation variability
    family variation
    heritability
    plant population
    Zwierzyniec Lubelski region
    Blizyn region
    Kutno Forest District
    Polska
    Opis:
    The study investigates the intra-population variability of the growth and quality traits of Norway spruce populations from Bliżyn and Zwierzyniec Lubelski. The two populations are included in the IUFRO 1972 experiment and exhibit a high growth dynamics and a narrow crown form. The research was carried out on the experimental plot established in 1996 in Chrosno (Kutno Forest District) using 8228 two-year-old seedlings planted in a single-tree plot design at a spacing of 1.5 × 1.5 m. The seedlings represent 191 open-pollinated families, among them 93 families of Norway spruce from the Bliżyn region and 98 families from the Zwierzyniec Lubelski region. The height, height increment and DBH of trees were measured periodically, and some quality traits were assessed. The last results come from the measurements done on the trees aged 10 years. It was found that the differences between the two populations of Norway spruce are statistically nonsignificant but both of them show wide within-population variability. This suggests that they have the potential to flexibly respond to future changes in the growth conditions or to seed transfer to other seed zones. Survival in the environmental conditions of the experiment was independent of family.
    Źródło:
    Dendrobiology; 2009, 61 Supplement
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Variation in size-dependent fitness components in a terrestrial orchid, Dactylorhiza majalis (Rchb.) Hunt et Summerh., in relation to environmental factors
    Autorzy:
    Mroz, L.
    Kosiba, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/57438.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    variation
    size-dependent fitness component
    terrestrial orchid
    orchid
    Dactylorhiza majalis
    environmental factor
    European orchid
    total leaf area
    plant size
    flowering probability
    flower production
    threshold size
    plant reproduction
    leaf area
    meadow site
    Polska
    soil nutrient
    plant population
    Opis:
    We investigated the flowering probability and flower production in relation to plant size in a terrestrial orchid, Dactylorhiza majalis at 10 meadow sites in central and southwestern Poland. These sites differed in altitude (low, high) and management (presence or absence of mowing). At all sites, concentrations of nutrients in the soil were also measured. The probability of flowering increased significantly with the size of the plant in all populations, indicating that individuals do not flower until they reach a threshold size. Populations at high altitudes and the unmown sites had significantly lower threshold sizes for reproduction and showed sharp increase in flowering probability with plant size, compared to other populations. The threshold sizes for reproduction tended to decrease at sites rich in N and Mg and poor in P and S. Flower production was also size-dependent in all populations. Considerable between-site differences were found in the slope and the intercept of the regression between plant size and flower production. Flower production at some sites, at high altitudes, increased more steeply with plant size than at other sites. However, no pattern in size-dependent flower production was found relative to the measured environmental variables. Most of the size-dependent components of flowering probability were related to each other but not with the size-dependent flower production.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2011, 80, 2
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Variability of needle characters of Pinus mugo Turra populations in the Karkonosze Mountains in Poland
    Autorzy:
    Sobierajska, K
    Boratynska, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/41473.pdf
    Data publikacji:
    2008
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    Polska
    Karkonosze Mountains
    mountain pine
    subalpine plant
    Pinus mugo
    needle variability
    morphological characteristics
    anatomical characteristics
    plant variation
    plant conservation
    plant population
    Opis:
    The basic aim of the work was to widen the knowledge about variation of Pinus mugo in the Karkonosze (Giant) Mountains and verification of provenance of several, probably planted populations on that basis. Seven populations were sampled, four on hardly accessible precipices of glacial cirques as natural, and three on the topical, mostly plane or only slightly in clined parts of the mountains as potentially alien ones. The variation of the needles was biometrically analyzed in respect of 23 morphological and anatomical characters. Measurement data were subject of multivariate statistical analyses. Results call attention on rather continuous variability of P. mugo in the Karkonosze Mts. The differences among samples were found as relatively low and no direct connections have been detected between variation and provenance from precipices versus plane sites.
    Źródło:
    Dendrobiology; 2008, 59; 41-49
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Differentiation of Pinus sylvestris populations of the Tatra Mts and the Tuchola forest expressed in the needle anatomical traits
    Autorzy:
    Urbaniak, L
    Chudzinska, E.
    Faferek, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/41621.pdf
    Data publikacji:
    2008
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    Polska
    Tatras Mountains
    Tuchola Forests
    Pinus sylvestris
    differentiation
    needle
    biometry
    statistical analysis
    anatomical trait
    plant population
    plant variation
    Opis:
    The differentiation among three populations of Pinus sylvestris of the Tatra National Park (TNP); Łysa Skała, Siwarowe Pańskie and Wielkie Koryciska has been investigated with regard to eight anatomical traits of needles. These populations were compared to a lowland population of Tuchola Forests. Five analyzed traits: the thickness of epidermis with cuticle, the mean of width of three epidermis cells, the width of needle cross-section, the height of a needle cross-section and the ratio of height to the width of a needle are characterized by a variation coefficient not exceeding 10%. Variation coefficients for the remaining traits: the number of resin canals, the distance between vascular bundles and a Marcet coefficient, range between 15.04 – 24.95%. The needles of the lowland population (Rzepiczna) turned out to be the widest as well as the thickest and with the biggest distance between vascular bundles. The Tatra populations of P. sylvestris have a considerably thicker cuticle together with epidermis compared with the lowland population of Tuchola Forests. None of the individual traits differentiate the populations which have already been regarded as distinct – Łysa Skała, found in the eastern part of the TNP and Wielkie Koryciska, from its western part. However, having carried out a discriminant analysis and Mahalanobis distances, the differentiation of the Tatra Scots pine in relation to its geographical location was reported. The individual character of P. sylvestris found in the eastern and western parts of the Tatra National Park might be a result of their different origin in the last glacial period.
    Źródło:
    Dendrobiology; 2008, 60; 35-43
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Gender and age structure as well as body weight of partridge (Perdix perdix L.) during periods of high and low population density in the Lublin Upland
    Struktura płci i wieku oraz masa ciała kuropatw (Perdix perdix L.) w okresach dużego i małego zagęszczenia ich populacji na Wyżynie Lubelskiej
    Autorzy:
    Flis, M.
    Panek, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2585.pdf
    Data publikacji:
    2017
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    gender variation
    age structure
    body weight
    partridge
    grey partridge
    Perdix perdix
    population density
    Lublin Upland
    Polska
    Opis:
    Gender and age structure as well as body weight of partridge (Perdix perdix L.) during periods of high and low population density in the Lublin Upland. Studies upon structure of gender and age as well as body weight of partridges were carried out in the Lublin Upland in 1988 and 2015, different in relation to the levels of these animals population density. These features were evaluated in 104 individuals culled in early October. Nearly 4-fold decrease in the population density of this species was recorded between the compared periods. Over 80-fold decrease in the hunting acquisition of partridge occurred the same period. A decrease in the share of females in the population after the breeding period was also found, which probably resulted from an increase in this gender mortality during the breeding season. Proportions of the number of juveniles to adult animals (2.4 and 1.7), and to adult males (4.0 and 1.7) in two subsequent study years, i.e. indicators of the young partridges production, did not differ significantly, but it could be mainly due to a small sample in the latter year. The gender structure of juvenile partridges was 0.94 male per female in 1988 and 0.71 male per female in 2015, which did not significantly differ between periods (χ2 = 0.178). Among adult individuals, 1.5 male per female were recorded in 1988, while only males were reported in 2015. Body weight of young partridges decreased between the years of research by 22.5 gram, i.e. 6%, while adult animals by 12.5 gram, which indicates the decrease in bird size, and thus the individual condition, presumably due to limited food resources. Differences in body weight between periods were statistically significant only at young animals. Such situation can cause enhanced mortality of young partridges in autumn and winter, therefore worsen the existing regress in this species population. The results confirmed that the previous assessment of the causes of the decline in partridges population in Poland, showing an increase in losses during the breeding season, as the main demographic mechanism, were valid also for the second decade of the twenty-first century. It follows that improving the environmental conditions during the breeding season, besides reducing the number of predators, should be an essential part of the partridge active protection programs.
    Struktura płci i wieku oraz masa ciała kuropatw (Perdix perdix L.) w okresach wysokiego i niskiego zagęszczenia ich populacji na Wyżynie Lubelskiej. Badania struktury płci i wieku oraz masy ciała kuropatw prowadzone były na Wyżynie Lubelskiej w latach 1988 i 2015, różniących się poziomem zagęszczenia tych zwierząt. Wymienione cechy oceniono u 104 osobników odstrzelonych na początku października. Pomiędzy porównywanymi okresami odnotowano prawie 4-krotny spadek poziomu zagęszczenia populacji tego gatunku. W tym samym okresie wystąpił ponad 80-krotny spadek łowieckiego pozyskania kuropatw. Stwierdzono także zmniejszenie się udziału samic w populacji po okresie rozrodu, co prawdopodobnie wynikało ze zwiększenia się śmiertelności tej płci w sezonie lęgowym. Proporcje liczby osobników młodych do dorosłych (2,4 i 1,7) oraz do dorosłych samców (4,0 i 1,7) w dwóch kolejnych latach badań, czyli wskaźniki produkcji młodych, nie różniły się istotnie, choć mogło to wynikać głównie z małej próby w drugim z tych lat. Struktura płci młodych kuropatw wynosiła 0,94 samca/samicę w 1988 oraz 0,71 samca/samicę i nie różniła się istotnie pomiędzy okresami (χ2 = 0,178). Wśród osobników dorosłych stwierdzono 1,5 samców/samicę w 1988 roku, natomiast w roku 2015 odnotowano jedynie samce. Masa ciała młodych kuropatw zmniejszyła się pomiędzy latami badań o 22,5 grama tj. 6%, zaś osobników dorosłych o 12,5 grama. Wskazuje to na obniżenie wielkości ptaków, a tym samym kondycji osobniczej, prawdopodobnie na skutek ograniczenia zasobów pokarmowych. Różnice masy ciała pomiędzy okresami były istotne tylko u osobników młodych. Tego rodzaju sytuacja, może powodować zwiększoną śmiertelność młodych kuropatw jesienią i zimą, a tym samym pogłębiać trwający regres liczebności tego gatunku. Uzyskane wyniki potwierdziły, że wcześniejsze oceny przyczyn spadku liczebności kuropatw w Polsce, wskazujące wzrost strat w sezonie rozrodczym, jako główny mechanizm demograficzny, były aktualne także w odniesieniu do drugiej dekady XXI wieku. Wynika stąd, że poprawianie warunków środowiskowych podczas sezonu rozrodczego, oprócz redukcji drapieżników, powinno być zasadniczą częścią programów czynnej ochrony kuropatw.
    Źródło:
    Annals of Warsaw University of Life Sciences - SGGW. Animal Science; 2017, 56[1]
    1898-8830
    Pojawia się w:
    Annals of Warsaw University of Life Sciences - SGGW. Animal Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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