Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "Fragmentation" wg kryterium: Temat

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-8 z 8
    Tytuł:
    Metoda wyróżniania kompleksów leśnych na podstawie ciągłości obszarów leśnych i zadrzewionych
    Method of forest patches generalisation based on connectivity of forest and other wooded land areas
    Autorzy:
    Budniak, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/979259.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    forest patch
    connectivity
    fragmentation
    Opis:
    The aim of this study was to present a method for assessing the connectivity of forest areas and the rules for generalisation of forest patches as the spatial planning units. The analyses were carried out for the entire area of Poland. Topographic maps (vector data) as well as software for spatial analysis (QGiS) and database analyses were used. Method of generalisation of forest patches involved two stages. The first one included separation of continuous forest areas consisting in the identification of patches located at a maximum distance of 50 m from each other. Patches generalised into continues forest areas were distributed among eight area classes: over 50 000 ha, 25 000,1−50 000 ha, 500,1−25 000 ha, 200,1−500 ha, 25,1−200 ha, 5,1−25 ha, 0,6−5,0 ha and up to 0,5 ha. The other step included separation of isolated continuous forest patches, which means patches that were out of the range of continuous forest areas in higher area classes. Ranges of continuous forest areas were calculated using 500 m buffer. Results of this study shows that forest patches cover 33,9% of Polish land area. Methods used in this study allowed to reduce input number of patches (764,850) by over 50% up to 338,682 ones. Generalisation of data caused changes in the landscape metrics: mean patch size more than doubled, patch density decreased by more than half, and the largest patch index increased very strongly (forty five times). Based on the literature review and results obtained in this research, it was found that in Poland afforestation intended to conservation of specialized forest species should focus on creating ecological corridors between distinguished forest patches (continuous forest areas). With the current forest cover and forest spatial structure in Poland, afforestation intended to conservation of specialized forest species by reducing edge effect in existing forest patches remains also important, but rather is a secondary need.
    Źródło:
    Sylwan; 2020, 164, 10; 820-830
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ fragmentacji kompleksów leśnych na dokładność określania powierzchni lasów na przykładzie województwa łódzkiego
    Impact of forest complexes fragmentation on accuracy of forest area evaluation on an example of Lodz voivodeship
    Autorzy:
    Budniak, P.
    Jabłonski, M.
    Zięba, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/979213.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    fragmentacja lasow
    powierzchnia lasów
    kompleksy leśne
    leśnictwo
    woj.łódzkie
    forest complex
    fragmentation
    land use
    Opis:
    Every year official data on forest area in Poland is published by the Statistics Poland. Some of this data is based on land use information contained in the Land and Property Registry (LPR). The aim of this study was to examine compliance between forest areas obtained from official land use maps and from aerial photos. Another purpose was to investigate the impact of forest complexes fragmentation on the accuracy of forests area evaluation, using land use data. The Łódź voivodeship was selected as the study area and 280 sample plots (1 km2) were established in systematic 8×8 km grid on aerial photos. Forest areas were manually inventoried using GIS software and compared with LPR maps. In the next step inventoried forests were combined into complexes using spatial analysis. The results from this study demonstrate that 3,4% of the Łódź voivodeship is covered by forest vegetation on lands not recorded as a forest in the LPR. Therefore real value of forest area is possibly higher than those based upon data published by Statistics Poland. Additionally, the part of lands with forest vegetation not recorded as a forest in LPR in total forest area has a statistical relationship with forest complex fragmentation. Much of inventoried forest complexes (41%) officially are not considered as such because of different land use record in LPR. However, our research shows that most of them (given area not the number of objects) is located in forest complexes partly recorded in LPR with correct land use record.
    Źródło:
    Sylwan; 2020, 164, 02; 142-150
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ocena fragmentacji lasów Pomorza Zachodniego pomiędzy XV a XX wiekiem
    Evaluation of the forest cover fragmentation in Western Pomerania between the 15th and 20th century
    Autorzy:
    Pieńkowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/989791.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    lasy
    fragmentacja lasu
    spadek lesistosci
    Pomorze Zachodnie
    wiek XV-XX
    forest fragmentation
    land use changes
    landscape metrics
    Opis:
    The paper analyzes the changes of forest fragmentation in the Western Pomerania region (NW Poland). The analysis was carried out basing on maps from 16th and 18th century as well as 1930s, when the forest cover in the studied area was the lowest. The historical area of forests was assessed on the basis on Hartnack utilization maps. The analysis of numerical maps was carried out in the GUIDOS program, which enables to evaluate the fragmentation of the forests through Morphological Spatial Pattern Analysis (MSPA) that describes the geometry of patches and their interconnectivity. The program calculated the forest areas classified for the seven categories according to their functions in the landscape (MSPA classes). In the 15th century the forests coverage was around 52.5%. There was a significant loss of forest area between the 16th and 18th century, and in the 18th century they occupied 24.7% of the researched area. Because of the economic changes in the country that took place after the World War II, the forest area in Pomerania increased to 33.7%. It was found that changes in the forest area in the examined period resulted in a decrease in the area classified as forest interior (CORE) and an increase in the boundary area (EDGE). Taking into account the equidistant of 1 km², the area occupied by the core patches dropped in the analysed period from 59.9% to 35.6%. At the same time the spatial isolation of many patches increased, which was reflected in an increase in the area classified as ‘islands' (ISLET). Their share in relation to the entire forest area increased from 4.4% to 23.6%. This could be particularly seen in the area of Pyrzycko−Stargardzka Plain and Choszczno Lakeland, where in the 1930s the so−called forest islands constituted the entire forest area of these mesoregions. The MSPA analysis enabled to specify forest patches classes, which can be useful for landscape characterization, including the patch and corridor model. The fragmentation of forests can be objectively assessed using GUIDOS and it can make the output results obtained in GIS programs complete.
    Źródło:
    Sylwan; 2015, 159, 07; 610-616
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ zmian w lesistości na stopień fragmentacji lasów Pojezierza Ińskiego w XX wieku
    Impact of the forest cover changes on the degree of fragmentation of the Insko Lakeland forests in the 20th century
    Autorzy:
    Pieńkowski, P.
    Podlasiński, M.
    Stoltman, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/979351.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    Pojezierze Inskie
    wiek XX
    leśnictwo
    lesistość
    zmiany lesistości
    fragmenatacja lasów
    orest cover
    landscape metric
    habitat fragmentation
    historical maps
    Opis:
    The aim of this work was to present changes in the fragmentation of forest area characterised by a two−fold increase in forest cover during the last century. The Forest Area Density (FAD) indicator was utilised in order to determine the forest fragmentation for the raster analysis of numeric maps. Its calculation was made using GuidosToolbox software. The research covered 1862 km2 of a predominantly post−glacial area of the Ińsko Lakeland, located in the north−western part of Poland. At the end of the 19th century, forests occupied 273.0 km2 of this area, while at the beginning of the 21st century their area coverage increased to 612.5 km2. The observed increase in the forest cover was associated with changes in forest fragmentation, which was analysed using the FAD. When comparing the two surveyed periods on the synthetic result maps obtained by utilising the FAD method, visible changes can be seen in individual forest categories, which indicate a decrease in the fragmentation of forest areas. The use of fragmentation measures is justified because according to the data found in the literature, the recently observed increase in forest coverage in many areas of Europe does not always determine the decrease in their fragmentation. This verifies the legitimacy of using the FAD indicator in the context of ecological and economic assessments.
    Źródło:
    Sylwan; 2020, 164, 01; 41-48
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Gospodarka łowiecka i ostatnie carskie polowania w Puszczy Białowieskiej (1912-1913) w relacji Mitrofana Golenki
    Game management and the last imperial hunts in Bialowieza Primeval Forest [1912-1913] in the report of Mitrofan Golenko
    Autorzy:
    Daszkiewicz, P.
    Jędrzejewska, B.
    Samojlik, T.
    Bańka, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1013091.pdf
    Data publikacji:
    2008
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lowiectwo
    historia
    gospodarka lowiecka
    lesnictwo
    Puszcza Bialowieska
    polowania carskie
    environmental history
    monarchical hunts
    forest fragmentation
    alien species introductions
    Opis:
    The paper presents Polish translation of the article by Mitrofan Golenko (originally published in 1935) reporting the last imperial hunts that Russian tsar and his family held in Białowieża Primeval Forest in 1912−1913. The article gives information on the hunting techniques and organisation of monarchical hunts in the early 20th century.
    Źródło:
    Sylwan; 2008, 152, 12; 47-59
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Drzewostany przejęte z Państwowego Funduszu Ziemi – stan i problemy zagospodarowania
    Forest stands acquired from the State Land Fund – the condition and management problems
    Autorzy:
    Kędziora, W.
    Orzechowski, M.
    Wójcik, R.
    Wrzosek, E.
    Borecki, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/985718.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    lasy prywatne
    grunty lesne
    przejmowanie gruntow
    zagospodarowanie lasu
    fragmentacja lasu
    Nadlesnictwo Siedlce
    Panstwowy Fundusz Ziemi
    private forests
    land transfer
    forest fragmentation
    Opis:
    In this paper, we present problems with the management of the forests acquired by the State Forests from the State Land Fund. This was particularly an issue in forest districts with a significant share of private forests, e.g. eastern part of Poland. The problem becomes more and more valid because of the latest amendment of the Forest Act in 2016. It gives the State Forests the right of the first purchase of private forests attributed to sale. They may receive forest stands that will generate specific economic problems related to care, conservation, felling maintenance, etc. These are mostly stands with typical features of private forests, resulting from abandoning economic operations, selective acquisition, as well as from the size, shape and neighbourhood of the plots. This study presents the characteristics of almost 2,000 tree stands acquired from the State Land Fund between 1992−2016 by the Siedlce Forest District (SFD), which is a part of the Regional Directorate of the State Forests in Warsaw. SFD has low forest cover (18%), a strong fragmentation of forest complexes and a very large share of private forests (over 75%). The analysis was based primarily on the descriptions of forest stands and the quantitative and qualitative characteristics, presenting at the same time the problems that SFD has with conducting rational forest management in acquired plots. The current status of the forests transferred from the State Land Fund was assessed as unsatisfactory. The main problems in local conditions are: (i) inadequate fixation in acquired parcels next to private forests (difficulty in locating treatments and custody over the State property), (ii) depleted tree stands, (iii) inadequate parcels (too narrow) and (iv) complications related to co−ownership of parts seized plots. The need to carry out joint−assembly works (mainly land consolidation) or to introduce land communities that would facilitate the management of these forests was demonstrated.
    Źródło:
    Sylwan; 2019, 163, 08; 665-674
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zmiany powierzchni leśnych na terenie miasta i gminy Krotoszyn w latach 1793-2005
    Changes in the forest cover in the town and commune of Krotoszyn in the years 1793-2005
    Autorzy:
    Macias, A.
    Szymczak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1008626.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    gmina Krotoszyn
    miasta
    Krotoszyn
    lasy
    kompleksy lesne
    zmiany powierzchniowe
    fragmentaryzacja lasu
    lata 1793-2005
    forest cover
    changes
    fragmentation
    archival topographic maps
    krotoszyńska plate
    Opis:
    The aim of this study was to show the changes in forest cover in the town and commune of Krotoszyn in the last 200 years. The analysis of topographic maps, with the use of landscape indicators showed that despite the relative stability of the size of forest area from 1829 to the present, significant changes in their structure caused by human activity occurred.
    Źródło:
    Sylwan; 2012, 156, 09; 710-720
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dekompozycja obumarłych drzew w ekosystemach leśnych ze szczególnym uwzględnieniem świerka, buka i jodły
    Decomposition of coarse woody debris in forest ecosystems with particular reference to spruce, beech and fir
    Autorzy:
    Bujoczek, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/994583.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    ekologia lasu
    ekosystemy lesne
    drzewa obumarle
    jodla
    Abies
    buk
    Fagus
    swierk
    Picea
    drewno jodlowe
    drewno bukowe
    drewno swierkowe
    dekompozycja
    decomposition
    fragmentation
    decay
    coarse woody debris
    fir
    spruce
    beech
    Opis:
    Dead trees are an important component of forest ecosystems, being a major reservoir of organic carbon, as well as a habitat for many species belonging to different systematic groups. The paper presents a review of the literature on wood decomposition and the factors that play an important role in this process, including its biological and physicochemical aspects. It provides recent knowledge on the rate of decomposition for the main forest tree species of Carpathian Mountains such as Norway spruce, European beech and European silver fir.
    Źródło:
    Sylwan; 2012, 156, 03; 208-217
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies