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Wyszukujesz frazę "biodiversity conservation" wg kryterium: Wszystkie pola

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    Tytuł:
    Ochrona bioróżnorodności Puszczy Białowieskiej w kontekście dynamiki naturalnych i sztucznych zaburzeń
    Biodiversity conservation in the Bialowieza Forest in the context of natural and anthropogenic disturbances dynamics
    Autorzy:
    Hilszczański, J.
    Jaworski, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/985946.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    Puszcza Bialowieska
    ochrona bioroznorodnosci
    ochrona przyrody
    ochrona scisla
    ochrona czynna
    sukcesja naturalna
    diversity conservation
    strict protection
    active protection
    natural succession
    intermediate disturbance
    hypothesis
    Opis:
    The paper presents the issue of conservation of species diversity of the Białowieża Forest in the context of both natural and human−related disturbances. These disturbances, in the authors’ opinion, were the main factor that shaped the unique species diversity of this area. Examples of natural disturbances occurring in the Białowieża Forest include the impact of wind, insect outbreaks and, to a lesser extent, fires. On the other hand anthropogenic disturbances are related to various forms of forest use, which historically took place here, i.e. grazing by domestic animals, beekeeping, charcoal production, and recently also forest management. Currently, in the situation of rarity and unpredictability of natural disturbances, as well as due to a significant decrease in human impact on forests of the Białowieża Forest, there is a risk of decrease of biodiversity, which is related to the process of natural succession, homogenization of the forest and the decline of favourable habitats for the development of some organisms. This particularly applies to the so−called ‘open forest’ species that are dependent on sunny places in forests. Historically these species found favourable conditions in the Białowieża Forest in many sites, where traditional forms of forest use took place, but also in areas used for traditional forest management. At present, it is necessary to adapt forest management on the one hand and nature conservation on the other, in order to meet the requirements of diverse groups of organisms, both requiring passive as well as active methods of conservation. The authors postulate the necessity of introducing a diverse conservation strategy in the Białowieża Forest.
    Źródło:
    Sylwan; 2018, 162, 11; 927-932
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Alternatywne koszty ustanowienia stref ochrony gatunkowej ptaków w lasach na przykładzie wybranych nadleśnictw
    Opportunity costs of establishing bird protection zones in selected forest districts
    Autorzy:
    Kaliszewski, A.
    Młynarski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/989768.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    ochrona przyrody
    gniazda ptasie
    strefa ochronna gniazd
    ustanowienie strefy ochronnej
    koszty alternatywne
    koszty straconych korzysci
    lasy gospodarcze
    zaprzestanie uzytkowania
    utrata miejsc pracy
    zmniejszenie przychodow
    Nadlesnictwo Grojec
    Nadlesnictwo Zwolen
    biodiversity conservation
    public forests
    local labour market
    economic loss
    Opis:
    The article presents the results of research on the opportunity costs related to establishment of perennial bird protection zones in forests located in two randomly selected forest districts of the Mazowieckie Province: Grójec and Zwoleń (Regional Directorate of the State Forests in Radom). The analysis included calculation of profits lost by forest districts due to termination of timber harvest in bird protection zones and also estimation of work places lost as a result of introduction of new limitations (social costs). The analysis was conducted based on the assumption that currently protected tree stands within protection zones would have been managed in a regular manner, i.e. that pre−commercial and commercial thinning, as well as final cuttings would have taken place and that they would have been a source of income to the examined forest districts. Based on the characteristics of tree stands within protection zones derived from the forest management plans for the forest districts at stake, potential thinning and cutting volumes for a 10−year period as well as potential incomes from timber sale were determined. The calculated timber volume was also used for estimating labour intensity of timber harvesting and skidding. Establishment of perennial bird protection zones generated losses in timber harvest in the amount of about 24.6 thousand m³ during the period of 10 years, which equals to about 1.7% (Grójec) and 2.2% (Zwoleń) of planned timber harvest amounts stated in the forest management plans of the studied forest districts. Total opportunity costs were equal to 3478 thousand PLN during 10 years or 1313 PLN/ha of protection zone annually. Annual opportunity costs calculated per unit of forest area of the forest districts were equal to 11.56 PLN/ha. The estimated loss in work places was 0.85 full−time jobs annually per every 100 ha of perennial bird protection zones. Results show that economic and social costs of nature protection activities concentrate in places of their origin. Those costs are felt the most by owners of affected forests and local communities. Exploration and introduction of instruments allowing mitigation of negative effects resulting from restrictions in forest use are therefore recommended.
    Źródło:
    Sylwan; 2015, 159, 07; 558-564
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Bezpośrednie koszty i źródła finansowania ochrony przyrody i różnorodności biologicznej w nadleśnictwach w województwie mazowieckim
    Direct costs and sources of financing of nature conservation and biodiversity protection in forest districts in the Mazowieckie Province
    Autorzy:
    Kaliszewski, A.
    Młynarski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/989967.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    nadlesnictwa
    ochrona przyrody
    ochrona bioroznorodnosci
    koszty bezposrednie
    zrodla finansowania
    woj.mazowieckie
    public funds
    subsidies
    forest policy
    Opis:
    The paper analyses direct costs of nature conservation and biodiversity protection incurred by forest districts of the State Forests in the Mazowieckie Province in the period 2008−2011. It also examines sources of their financing. The study shows that the largest amount of money – 65% of all costs – was spent on a wide range of activities related to biodiversity protection. The most significant fund donors were forest districts themselves. They provided 68.3% of all resources for nature conservation and biodiversity protection. The research also shows that funds received for these purposes from the state budget are rather of secondary importance.
    Źródło:
    Sylwan; 2014, 158, 07; 491-498
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zespoły chrząszczy ściółkowych w gospodarczych i chronionych borach sosnowych - efekt 15 lat ochrony rezerwatowej
    Coleoptera assemblages inhabiting managed and preserved pine forests - the effect of fifteen years of reserve conservation
    Autorzy:
    Tamutis, V.
    Skłodowski, J.W.
    Powiązania:
    https://bibliotekanauki.pl/articles/973525.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    ekologia lasu
    owady
    bor sosnowy
    rezerwaty przyrody
    drzewostany gospodarcze
    leśnictwo
    ściółka leśna
    zgrupowania zwierząt
    chrząszcze
    analiza porównawcza
    biodiversity
    transforming managed forest into reserve
    SIMPER analysis
    Opis:
    The assemblages of Coleoptera have been examined in the managed and reserved mature pine forests of Lithuania since 1997. Beetles have been sampled from the forest litter using sieves. The present study is based on the data of 20 litter samples (10 samples per each stand) taken in the period from October 2013 to February 2014. Each sample was compiled of 5 smaller ones taking all litter (up to mineral layer of the soil) from 0.04 m2 plot. During the study a total 450 adults representing 69 species of beetles was discovered. Both the average number of species and the number of individuals were found to be higher in the samples taken in reserved forest and made 10.7±1.4 and 27.2±4.9, whereas in managed forest they made 9.7±1.1 and 17.8±3.4, but the differences were not statistically significant. The proportions of phytophagous, mecetobionts and saprophagous were also bigger in reserved forest: 9.5±2.0, 7.8±2.2, 3.1±1.0 than those in the managed forest, where these groups consisted of 8.0±1.8, 4.9±1.7 and 2.8±1.6 percent of the total number of individuals in the sample, respectively. The opposite proportions were detected for zoophages, which were more ambiguous in the managed forest and were by 76.0±2.5 higher than those in the reserved forest 72.8±3.2. These differences were not statistically significant. A non−metric multidimensional scale (NMDS) using Bray−Curtis similarity matrix indicated low differences of the Coleoptera assemblages between investigated sites (final stress=0.22). The analysis using RDA showed some differences between Coleoptera assemblages inhabiting reserved forest (R) and managed forest (D), which were correlated with proportions of humified mortmass (+0.88) and biomass of moss (–0.63 and –0.71). The dissimilarity index calculated using the algorithm SIMPER, was quite high (71%), but the obtained results showed a relatively low diversity of beetle assemblages in both forests. It means that the process of transformation of the managed forest into reserve is very slow, most likely due to the fact that restoration of the microhabitats is particularly slow. Low differentiation of Coleoptera assemblages dwelling in litter is associated with low dispersal power of most coleopteran species. Thus, the establishment of new reserves in old growth pine forests can not stimulate fast increase of specific beetle diversity mainly because the regenerative processes of microhabitats seem to be extremely slow. The specific diversity of beetle assemblages was slightly higher in the reserved forests, but it was not confirmed statistically. In comparison with the managed old growth pine forest the period of fifteen years of reservation of old growth pine forest has only a very low effect on specific diversity and ecological specialization of the beetles.
    Źródło:
    Sylwan; 2015, 159, 02; 142-150
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zmiany w runie żyznej buczyny niżowej Galio odorati-Fagetum w rezerwacie Wronie w latach 1967-2005
    Changes in herb layer vegetation in Pomeranian fertile beech forest Galio odorati-Fagetum in Wronie nature reserve in 1967-2005
    Autorzy:
    Puchałka, R.
    Cyzman, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/989805.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    lasy
    rezerwaty przyrody
    rezerwat Wronie
    drzewostany bukowe
    zbiorowiska roslinne
    zyzna buczyna nizowa
    zespol Galio odorati-Fagetum
    runo lesne
    roznorodnosc gatunkowa
    nature conservation
    biodiversity
    beech forest
    ellenberg's values
    northern poland
    Opis:
    The Wronie nature reserve was established in 1978 for conservation of Pomeranian fertile beech forest Galio odorati−Fagetum (=Melico−Fagetum) outside of the natural range of European beech Fagus sylvatica. Reserve is located in Golub−Dobrzyń Forest District (53°18'39.52"N; 18°54'3.89"E; N Poland). The aim of our study was to determine the influence of passive protection for beech forest herb layer biodiversity. For our research, we used four series of phytosociological relevés made in 1967, 1984, 1995 and 2005. To investigate changes in habitat conditions we used Ellenberg indicator values. Differences between years were analysed with ANOVA and Tukey test. In subsequent years, the frequency and cover of non−forest species, mainly from Epilobietea, Artemisietea, Trifolio−Geranietea and Molinio−Arrhenatheretea classes increased. This is caused by the increase in light availability, as result of disturbances in the tree stands (windthrow, oak decline, insect gradation). Light is the only Ellenberg coefficient that has significantly changed during 38 years (fig., tab. 2). Increase of light availability had no effect on biodiversity of forest herb species from Querco−Fagetea class. In comparison, with other studies in similar forest communities, our results suggests that passive protection might give different effects on biodiversity in similar forest communities, depending on tree stand dynamics.
    Źródło:
    Sylwan; 2015, 159, 06; 443-451
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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