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Wyświetlanie 1-2 z 2
Tytuł:
Charakterystyka miejsc gniazdowania jerzyka Apus apus w lasach Roztocza i Równiny Biłgorajskiej
Characteristics of nesting sites of the common swift Apus apus in the Roztocze and Biłgoraj Plains
Autorzy:
Stachyra, Przemysław
Mysłajek, Robert W.
Powiązania:
https://bibliotekanauki.pl/articles/16728971.pdf
Data publikacji:
2021
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
relict bird populations
protected areas
old-growth forests
reliktowa populacje ptaków
obszary chronione
lasy naturalne
Opis:
During field studies conducted in 2019-2021, the common swift Apus apus was recorded in 78 sites located in the Roztocze and Biłgoraj Plains in south-eastern Poland. In total, 39.3% of the recorded sites were situated in national parks or nature reserves. The number of nesting pairs averaged 1.7 ±0.9 SD (range 1-5) at each study site, and did not differ between protected and managed forests. Swifts occurred in both coniferous and deciduous forests with the majority in old-growth stands (mean 147 years ±28 SD, range 80- 99). Interestingly, the mean stand age favored by the species was significantly higher in the Roztocze National Park (mean 161.9 years ±20.1 SD, range 120-90) than in managed forests (mean 139.4 years ±28.6 SD, range 80-199). All cavities in which swifts nested (n=28) were located in Scots pines Pinus sylvestris L. with a mean diameter at breast height of 57.5 cm ±9.0 SD (range 40-75 cm), and a mean height of 27.7 m ±3.0 SD (range 23-32 m). Cavities were located between 5 m and 27 m above ground (mean 16.5 m ±5.7 SD). In total, 75% of the cavities inhabited by swifts were excavated by great spotted woodpeckers Dendrocopos major, while the remaining cavities were created through bloating at the site where branches had broken o.f These results indicate that in order to protect the relict forest populations of the common swift, it is necessary to preserve patches of old-growth stands.
Źródło:
Leśne Prace Badawcze; 2021, 82, 4; 167-172
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Porównanie trzech metod szacowania liczebności kopytnych na przykładzie Roztoczańskiego Parku Narodowego
Comparing three methods for estimating the population abundance of ungulates, on the Roztocze National Park example
Autorzy:
Borowski, Zbigniew
Borkowski, Jakub
Stachyra, Przemysław
Powiązania:
https://bibliotekanauki.pl/articles/35084470.pdf
Data publikacji:
2023-12
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
ungulates
red deer
roe deer
wild boar
density estimation
Opis:
Ungulates, primarily cervids, are keystone species as they play a crucial role in the forest ecosystem functioning. In commercial forests, hunting is the most intuitive and straightforward solution to regulate ungulate population density; managing large herbivores in protected areas is much more complicated. On the one hand, deer pressure on vegetation is a part of the natural processes shaping these ecosystems. On the other hand, however, when at high densities, deer can alter natural plant succession trajectories and generate conflicts in nature conservation. Nevertheless, information on population density or trends of these mammals is necessary to predict the potential role of ungulates in forest ecosystems and manage herbivore population densities. Unfortunately, most often, the managers of protected areas do not know the current population status of the large mammals living there. Furthermore, it could be impossible to analyse the large herbivore population trends based on historical inventory data collected using different methods with unknown accuracy. Here we discuss the advantages and disadvantages of three most commonly used inventory methods for large mammals in Poland, such as snow tracking, driving censuses, and pellet group counting. Conclusions on the reliability of the three methods were drawn based on the results of ungulate inventories in the Roztocze National Park, Poland. Snow tracking generates an error of unknown magnitude; therefore, historical data estimated by this method should be cautiously approached. Additionally, with this method, only coefficients are obtained, based on which it is impossible to estimate the population size. The pellet group counting is the least variable method regarding errors; it is cheap and logistically straightforward. Moreover, it also allows the analysis of winter habitat preferences of ungulates. It is therefore recommended as a method for estimating deer and wild boar abundance in many countries worldwide. In summary, long-term trends in abundance are most important for analysing and managing large mammal populations. Therefore, it is necessary to carry out inventories over several years, for which, due to the minor estimation errors and simple logistics, the pellet group counting method seems best.
Źródło:
Leśne Prace Badawcze; 2023, 83; 69-76
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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