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    Wyświetlanie 1-4 z 4
    Tytuł:
    Zmiany powierzchni leśnej w Bieszczadach Zachodnich w XIX i XX wieku
    Forest cover change in Western Bieszczady Mts. in 19 th and 20 th century
    Autorzy:
    Gielarek, S.
    Klich, D.
    Antosiewicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/973953.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    Bieszczady Zachodnie
    zmiany lesistosci
    wiek XIX
    wiek XX
    użytkowanie terenu
    forest cover
    landscape metrics
    Bieszczady Mts.
    Opis:
    This study aimed at quantitative spatial analysis of forest cover transformation in the Western Bieszczady Mts. based on two areas: Bieszczady Wysokie Mts. (from 1852 to 2004) and Baligród Forest District (from 1938 to 1996). Raster maps were created to illustrate two cover types: forest and non−forest. Using ACSII files and Fregstats 3.3 program, landscape metrics were calculated for whole landscape and both cover types. Landscape structure became simplified. Forest cover area increased with simultaneous patch number decrease and aggregation degree increase. Non−forest cover underwent inverse changes, such as area and aggregation degree decrease. Patch number change differed in both areas in relation to various processes of patch creation.
    Źródło:
    Sylwan; 2011, 155, 12; 835-842
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zmiana powierzchni zbiorowisk o charakterze leśnym w dolinie Karpnickiego Potoku jako przykład zmian lesistości w dolnych partiach Sudetów
    Changes in the area covered by woody plants communities in the Karpnicki Potok valley as an example of changes in forest area in lower parts of the Sudety Mountains
    Autorzy:
    Jaworek, J.
    Filipiak, M.
    Napierała-Filipiak, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/990969.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    Sudety
    wies Karpniki
    dolina Karpnickiego Potoku
    zmiany lesistosci
    zmiany powierzchniowe
    Numeryczny Model Terenu
    mapy topograficzne
    ewidencja gruntow
    mapy ewidencyjne
    zdjecia lotnicze
    increase of forest area
    lower parts of the mountains
    seminatural succession
    landscape
    Opis:
    On the basis of historical and recent cadastral maps, topographic maps, and aerial photographs, we analysed changes in forest area within the cadastral units of Karpniki village, in the Karpnicki Potok (SW Poland). In 1823−2012, forest area increased there from about 41% to over 57% of the total area. The greatest increase has been recorded recently. Moreover, at that time over 16% of land classified officially as farmland was naturally colonized by communities dominated by woody plants. This seminatural process in the analysed case does not pose any serious threat to natural resources, but a complete lack of its control may lead to deterioration of the value of the local landscape and development of low−quality forest stands. The observed changes seem to be typical of other areas located in lower parts of the Sudety Mountains.
    Źródło:
    Sylwan; 2014, 158, 09; 704-713
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zmiany wielkości i struktury przestrzennej lesistości a rozwój sieci obszarów chronionych na Roztoczu w XX w.
    Changes of Forest Area and Forest Cover and Development of a Network of Protected Areas on Roztocze in 20th Century
    Autorzy:
    Kałamucka, W.
    Kałamucki, K.
    Cebrykow, P.
    Cygan, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1818014.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Koszalińska. Wydawnictwo Uczelniane
    Tematy:
    zmiany lesistości
    formy ochrony przyrody
    Roztocze
    analiza przestrzenna
    forestation changes
    nature protection forms
    spatial analysis
    Opis:
    The aim of the study is to assess the size and the spatial distribution of forest cover change in Roztocze in the period 1930-1990, the identification of main causes and the connection with the system of protected areas. Different types of protected areas in both Polish and Ukrainian part of Roztocze were selected as test areas. High rank of natural values of Roztocze area justifies this selection. In 2011, Biosphere Reserve was created in the Ukrainian part and Transboundary Biosphere Reserve Roztocze will be created in the near future, including the Polish part. The area of TRB Roztocze will include the most important protected areas in the Polish and Ukrainian part of Roztocze, where the forests are a significant element of biodiversity.The study was based on the spatial data on forest areas and built-up areas obtained from topographic maps at scale 1: 100 000 made in the 30s and 90sof the twentieth century. Maps selection was preceded by query cartographic materials and the assessment of their suitability for these types of researches. The spatial analysis methods (GIS) were used in the studies, mainly cartometric methods. Their results are presented on maps using cartographic methods of presentation: ranges and cartograms.The study showed that in Roztocze region the forest area increased by over 20% in the analyzed time period (approx. 60 years). This situation refers mainly to protected areas situated on Roztocze Rawskie and Tomaszowskie. However, there was almost no changes recorded in the case of Roztocze Gorajskie, where the protected areas are the smallest. The main reason for the forest area increase were settlement changes (many of villages on the Polish-Ukrainian border zone disappeared after World War II) and forestry succession on rural areas. The forest area reduction was caused by the spatial development of urban centers such as Tomaszów Lubelski, Józefów and a formation of the military training ground in the Ukrainian part of Roztocze.
    Źródło:
    Rocznik Ochrona Środowiska; 2016, Tom 18, cz. 2; 363-374
    1506-218X
    Pojawia się w:
    Rocznik Ochrona Środowiska
    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
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