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Wyświetlanie 1-5 z 5
Tytuł:
Factors determining natural regeneration of yew (Taxus baccata L.) in the Kórnik Arboretum
Autorzy:
Giertych, P.
Powiązania:
https://bibliotekanauki.pl/articles/41677.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
seed dispersal
Turdidae
environmental factor
natural regeneration
yew
Taxus baccata
Sitta europea
regeneration
Kornik Arboretum
Opis:
All yew plants in the Kórnik Arboretum have been plotted onto maps of individual sectors and analysed with respect to location category (“near trunk”, “under canopy”, “in the open”), size (assumed to reflect age), genus of tree associated with in the “near trunk” category and environmental factors characterising the respective Arboretum sectors. There is practically no regeneration “in the open” (0.2%), most of it 82.5% is “under canopy” and only 17.3% “near the trunk”. It is assumed that thrushes (Turdidae) are primarily responsible for regeneration in the under canopy category (endozoochoria) and nuthatches (Sitta europea L.) in the near trunk category (synzoochoria). Under canopy regeneration exists in all size classes while near the trunk there is a distinct decline in the number of yew plants with increase in size (age) suggesting that conditions for further development there are less favourable. Nutchatches disperse yew seeds in the vicinity of mother plants, for cleaning them preferring trees to shrubs and particularly trees with smooth bark trunks (Fagus, Carpinus), however yew survival near the trunk is better under conifers. Thrushes disperse yew seed over wider areas. Survival of yews is best under loose canopies, in moderate shade, on drier well draining, low pH, soils.
Na planach sekcji Arboretum Kórnickiego zaznaczono wszystkie cisy, wyróżniając kategorię lokalizacji („przy pniu”, „pod koroną”, „naotwa rtej przestrzeni”), rozmiar cisa (związany z wiekiem), rodzaj drzewa dlaka tegorii „przy pniu” i czynniki środowiskowe różnicujące sekcje Arboretum. Praktycznie nie ma odnowienia„ naotwa rtej przestrzeni” (0,2%), większość cisów rośnie „pod koronami” (82,5%), a tylko 17,3% „przy pniu”. Zakłada się, że głównie drozdowate (Turdidae) są odpowiedzialne za odnowienie „pod koronami” (endozoochoria), a kowaliki (Sitta europea L.) „przy pniu” (synzoochoria). „Pod koronami” jest odnowienie we wszystkich klasach wielkości (wieku), a „przy pniu” obserwuje się wyraźny spadek liczebności wraz ze wzrostem siewek, co sugeruje, że warunki rozwoju są tam gorsze. Kowaliki roznoszą nasiona cisa w pobliżu drzew matecznych, ado ich czyszczeniapreferują pnie drzew bardziej niż krzewów i to drzew o gładkiej korze (Fagus, Carpinus), cisy natomiast przeżywają lepiej „przy pniu” drzew iglastych. Drozdowate rozprowadzają nasiona na większym obszarze. Utrzymanie się odnowieniajest najskuteczniejsze pod luźnym zadrzewieniem, w niewielkim ocienieniu, na suchszych, przepuszczalnych glebach, o niskim pH.
Źródło:
Dendrobiology; 2000, 45
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Interakcje genotypu ze srodowiskiem swierka pospolitego [Picea abies [L.] Karst.] z Beskidu Slaskiego, Zywieckiego i Orawy
Autorzy:
Krupski, P.
Giertych, M.
Czech, I.
Powiązania:
https://bibliotekanauki.pl/articles/821870.pdf
Data publikacji:
1996
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
Beskid Slaski
zmiennosc genetyczna
proweniencje
hodowla lasu
Orawa
Beskid Zywiecki
interakcja genotypowo-srodowiskowa
Picea abies
lesnictwo
swierk pospolity
drzewa lesne
Źródło:
Sylwan; 1996, 140, 09; 35-47
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Temperature effects performance of Lymantria dispar larvae feeding on leaves of Quercus robur
Autorzy:
Karolewski, P
Grzebyta, J.
Oleksyn, J.
Giertych, M.J.
Powiązania:
https://bibliotekanauki.pl/articles/41435.pdf
Data publikacji:
2007
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
herbivore insect
sex ratio
Lymantria dispar
larva
gypsy moth
feeding
leaf
oak
English oak
Quercus robur
pedunculate oak
temperature
performance
Opis:
Future climatic warming may modifyinsect development, sex ratio, quantitative changes in populations that could affect the frequency of outbreaks. Here we analyzed the influence of temperature on larval growth and development in the gypsy moth (Lymantria dispar L.). The larvae were reared at three constant temperatures: 15, 20 or 25°C, and fed with leaves of the English oak (Quercus robur L.). Larval mortality, duration of development (DD), relative growth rate (RGR), total mass of food eaten (TFE), and pupal mass (PM) were estimated. Larval mortality was lowest at 20°C, higher at 25°C, and highest at 15°C. DD significantly decreased with increasing temperature and depended on sex. The influence of temperature on the shortening of DD was stronger in males than in females. RGR significantly depended on temperature and was the highest at 25°C, and lowest at 15°C. At 15°C, RGR did not change markedly with time. In contrast, RGR at 20°C was characterized bya continuous decreasing trend. At 25°C, RGR was very high for 2 weeks but quickly declined afterwards. Temperature did not affect the TFE. PM was significantly correlated with temperature and sex. PM of females was higher at 20°C than at 15 and 25°C, in contrast to that of males, which was similar at 20 and 25°C, and higher than at 15°C. For larval growth and development, the most favourable was the medium temperature (20°C). The least favourable temperature for females was 25°C, for males 15°C. The results suggest that global warming may modifythe future sex ratio of gypsy moths that may affect insect development and outbreaks.
Źródło:
Dendrobiology; 2007, 58; 43-49
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Species composition of arthropods on six understory plant species growing in high and low light conditions
Autorzy:
Karolewski, P.
Lukowski, A.
Adamczyk, D.
Zmuda, M.
Giertych, M.J.
Maderek, E.
Powiązania:
https://bibliotekanauki.pl/articles/2078197.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
Cornus sanguinea
Corylus avellane
Frangula alnus
Prunus padus
Prunus serotine
Sambucus nigra
Opis:
The quality of leaves as food for insects is affected both by plant species and the light conditions present during growth. Little information exists concerning the impact of these factors on the diversity of insects that live in the forest understory. We studied arthropod fauna on six understory plant species commonly occurring in Europe. Different groups of herbivorous insects were identified, as well as predatory insects and arachnids. We analysed the influence of both plant species and light conditions during growth (low light; high light) on the species spectrum, and the number of insect specimens present. The resulting data were investigated in relation to the susceptibility of plant leaves to feeding by folivorous insects, as determined in earlier studies. We compared the similarity in species diversity, based on the Sørensen’s coefficient, and discussed the potential causes of observed differences in leaf damages. We found a total of 153 arthropod taxa on studied plants, under both light conditions. Corylus avellana and Prunus serotina, species characterized by greater leaf damage, have a wider diversity of arthropod species, and a greater number of herbivorous insects. Generally, light conditions had a greater effect on arthropod abundance than on species diversity. For two plant species, C. avellana and P. serotina, light conditions strongly, but reversely, influenced the total number of insects and, thus, the extent of leaf damage. The number and abundance of zoophagous species, and ratio to folivores (except C. avellana) are associated more with plant species than with light conditions
Źródło:
Dendrobiology; 2020, 84; 58-80
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of elevated temperature and fluorine pollution on relations between the pedunculate oak (Quercus robur) and oak powdery mildew (Microsphaera alphitoides)
Autorzy:
Grzebyta, J
Karolewski, P.
Zytkowiak, R.
Giertych, M.J.
Werner, A.
Zadworny, M.
Oleksyn, J.
Powiązania:
https://bibliotekanauki.pl/articles/41557.pdf
Data publikacji:
2005
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
pedunculate oak
Quercus robur
environment pollution
phenol
tannin
lignin
carbohydrate
starch
nitrogen
fluorine
oak powdery mildew
Microsphaera alphitoides
soil pollution
Opis:
Effects of elevated temperature and soil pollution with fluorine on host-pathogen relations were studied in seedlings of the pedunculate oak (Quercus robur L.) inoculated with oak powdery mildew (Microsphaera alphitoides Griff. et Maubl.) and control seedlings. The plants were grown for 1month in elevated temperature (on average by 1.6°C) and soil pollution with sodium fluoride (330 ppm F). The above factors did not have any significant effect on nitrogen content of leaves or on concentrations of metabolites favourable to growth and development of the fungal pathogen (total non-structural carbohydrates, including soluble carbohydrates and starch) and those unfavourable to fungi (soluble phenols, condensed tannins and lignins). The elevated temperature and fluorine pollution did not affect the leaf infection rate. However, a significant temperature × pollution interaction was observed in inoculated seedlings. At the elevated temperature, fluorine caused a less severe infection by powdery mildew. This could be due to a direct toxic effect of fluorine on the pathogen or by an indirect influence, resulting from changes in levels of other metabolites, which were not analysed in this study. The inoculation of oak seedlings with powdery mildew caused a decline in the carbohydrate content of leaves but did not have any significant effect on levels of other analysed metabolites. However, it significantly affected the distribution of phenols and lignins in oak leaves. Those compounds accumulated within necrotic lesions and in adjacent cells. Our results do not enable drawing definite conclusions on effects of a slight rise in temperature and a relatively low level of fluorine pollution of the soil on relations between the pedunculate oak and oak powdery mildew. Lower values of the leaf infection rate in seedlings growing in elevated temperature and fluorine pollution suggest that in warmer years a lower level of infection by M. alphitoides may be expected in areas affected by fluorine pollution.
Źródło:
Dendrobiology; 2005, 53; 27-33
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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