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Wyszukujesz frazę "zmiany lesistości" wg kryterium: Temat


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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
    Wyświetlanie 1-2 z 2

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