We documented the foraging activities of woodpeckers on selected trees in an established conservation-oriented management study in five oak-dominated forests in Hungary. We examined the tree species preference of woodpeckers as a group and the impact of specific tree characteristics on the habitat use of woodpeckers. We estimated the percentage of visible foraging signs on the trunks and upper limbs of selected trees through the winter and early spring of 2019–2020. Based on the Jacobs’ index, woodpeckers preferred oak species for foraging and most foraging signs were on limbs rather than trunks. Foraging signs on trunks were more frequent on those of larger diameters and greater heights. It was also found that the lower the tree, the greater the effect of its diameter on the occurrence of signs.
The aim of this study was to investigate the relationship between certain meteorological variables and Blackap (Sylvia atricapilla) populations and productivity at a western (Tömörd) and a north-eastern Hungarian (Szalonna) bird ringing station. For the evaluation, CES ringing data for the period 2004-2016 was used. According our results, Blackcap productivity was mainly affected by the minimum temperature of April, beginning of the breeding season. Thus, in case of colder periods, number of successfully fledged young birds decreased significantly. Occasionally, increased capture number of adult breeding Blackaps matched with lower productivity, indicating abundance-determined population regulation.
KivonatA Soproni-hegység két patakvölgyében, a Tolvaj-és a Vadkan-árokban vizsgáltuk a fekvő holtfa mennyiségi és minőségi jellemzőit. A patakvölgyek keresztmetszetében transzektek mentén történt a fekvő holt faanyag felvételezése. Megállapítottuk, hogy összességében a Tolvaj-árokban magasabb a fekvő holt faanyag aránya (30,66 m 3 /ha, míg a Vadkan-árokban 21,23 m 3 /ha), valamint, hogy a holtfa korhadási fázis, átmérő és fafaj szerinti megoszlása jelentős heterogenitást mutatott a területen. A korcsoportok szerinti vizsgálat eredménye egyezik az általunk elvárttal, azaz az állomány korának előrehaladtával a fekvő holtfa mennyisége is nő, a potenciális élőhelyeket vizsgálva pedig a legtöbb holtfát a gyertyános kocsánytalan tölgyesekben találtuk.Kulcsszavak: fekvő holtfa, Soproni-hegység, vonal menti mintavétel AbstractIn this paper we have analyzed the quantitative and qualitative dispersion of lying dead wood in two streambeds of the Sopron Mountains, the Tolvaj-árok and the Vadkan-árok. The estimation of the lying dead wood was made with the line transect method by perpendicular transects at the two valleys. The amount of dead wood was higher (30,66 m 3 /ha) in the Tolvaj-árok compared to the Vadkan-árok (21,23 m 3 /ha). The distribution of dead wood showed strong heterogenity on the study area for the three studied parameters (decay stage, diameter and tree species). The amount of fallen dead wood increased with stand age. Concerning forest communities, the largest amount of dead wood has been found in the sessile oak-hornbeam forests.
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