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Wyszukujesz frazę "forest expansion" wg kryterium: Temat


Wyświetlanie 1-4 z 4
Tytuł:
Definicja lasu w ujęciu krajowym i międzynarodowym oraz jej znaczenie dla wielkości i zmian powierzchni lasów w Polsce
National and international definition of forest and its importance for the forest area in Poland
Autorzy:
Jabłoński, M.
Powiązania:
https://bibliotekanauki.pl/articles/989804.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
lasy
tereny lesne
powierzchnia lasow
definicje
Polska
Organizacja Narodow Zjednoczonych
Protokol z Kioto
forest definition
forest cover
land use
forest expansion
afforestation
kyoto protocol
Opis:
Sustainable forest management, the leading topic in forest and environmental policy since the 1990s, has required an appropriate tools for both clarification of general principles and measurement of its progress. Many of indicators developed for these purpose are based on forest area. However, definitions of forest are not compatible, especially on national and worldwide scale. Definition of forest applied by FAO refers to crown cover and land use, while definition adopted for reporting under Kyoto Protocol refers only to the occurrence of trees. Polish Act on Forest applies the destination of land use as a determinant of forest. Paper analyses the process of forest area assessment in Poland for the purpose of national as well as FAO and UNFCCC reporting. Natural expansion of trees on abandoned agriculture land, still classified as the agriculture areas in cadastral system, was recognized as the biggest challenge of forest area assessment in Poland. Although natural succession is described by many authors, the total area subjected to this process is unknown. According to the FAO and Kyoto Protocol rules such areas should be reported as forests. As a consequence, forest area in Poland could be at least a few hundred thousand hectares higher than reported in the last assessments basing only on cadastral system. The proper classification of forests not recorded in the cadastral system would also be important challenge, otherwise between forest area on country and international level will be a huge discrepancy. But, there are some areas classified as a forest in Poland, which probably should not be included within FAO and Kyoto reporting. However, the most important topic concerns the possibility of identification of afforested areas, submitted under article 3.3. of Kyoto Protocol, basing on forest area changes between 1989 and 2012. One should recognise if afforested area is not overestimated using such approach, as a result of modification of forest definition in Poland in 1991. Additional question concerns the forest lands included into cadastral system after 1990, but afforested or resulting from natural succession occurring before that time, which currently are reported as afforestation under article 3.3. of Kyoto Protocol.
Źródło:
Sylwan; 2015, 159, 06; 469-482
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Odnowienie naturalne dębu w Leśnym Kompleksie Promocyjnym "Puszcza Białowieska" - stan, warunki i perspektywy
Autorzy:
Paluch, R.
Powiązania:
https://bibliotekanauki.pl/articles/1022909.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesne kompleksy promocyjne
Quercus
lesnictwo
dab
odnowienia naturalne
Puszcza Bialowieska
drzewa lesne
oak
natural regeneration
białowieża primeval forest
hornbeam expansion
Opis:
The paper presents the state and conditions of oak natural regeneration in the „Białowieża Primeval Forest” Promotional Forest Complex. It has been stated that under natural conditions oak appears in all forest types but it infrequently grows into a stand. With the recent expansion of hornbeam, it is difficult for oak effectively to regenerate. It has been confirmed in this study that the shelterwood cutting system (leaving some trees to dye naturally) is the most efficient method of natural regeneration of oak in the Białowieża stands.
Źródło:
Sylwan; 2005, 149, 01; 30-41
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Współczynniki przeliczeniowe suchej biomasy drzew i ich części dla sosny pospolitej (Pinus sylvestris L.) w zachodniej Polsce
Trees and their components biomass expansion factors for Scots pine (Pinus sylvestris L.) of western Poland
Autorzy:
Wojtan, R.
Tomusiak, R.
Zasada, M.
Dudek, A.
Michalak, K.
Wróblewski, L.
Bijak, S.
Bronisz, K.
Powiązania:
https://bibliotekanauki.pl/articles/973910.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
biomass expansion factors
Polska
Lubuskie forest
Scots pine
lesnictwo
dendrometria
drzewa lesne
sosna zwyczajna
Pinus sylvestris
biomasa sucha
wspolczynniki przeliczeniowe
Opis:
Paper presents trees and their components biomass expansion factors for Scots pine growing in the Lubuskie Forest (western Poland). Elaborated formulae enable to determine aboveground biomass of Scots pine trees and stands basing on stem or merchantable wood volume.
Źródło:
Sylwan; 2011, 155, 04; 236-243
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wieloletnie zmiany składu gatunkowego drzewostanów o podwyższonym reżimie ochronnym w Puszczy Augustowskiej i Puszczy Knyszyńskiej
Long-term changes of tree species composition in high protective regime stands in the Augustow and Knyszyn Forests
Autorzy:
Paluch, R.
Gabrysiak, K.A.
Powiązania:
https://bibliotekanauki.pl/articles/979555.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
Puszcza Augustowska
Puszcza Knyszynska
rezerwaty przyrody
drzewostany naturalne
zbiorowiska lesne
sklad gatunkowy
bor brusznicowy
bor mieszany trzcinnikowo-swierkowy
grad miodownikowo-grabowy
odnowienia naturalne
zmiany skladu gatunkowego
zmiany struktury drzewostanu
natural regeneration
forest reserve
natural stand
hornbeam expansion
Opis:
In the last decades, we observed significant changes in the tree species composition in all layers of close−to−natural stands. Since the 1970s, the Forest Research Institute has collected and stored dataset from stand measurements, phytosociological and other research that are the basis for the long−term monitoring of vegetation. The aim of the research was to determine the directions of changes in the species composition and structure of tree stands, and to analyze the changes in the species composition of natural regeneration growing without human interference in various forest communities in the period of about 40 years. From 2014 to 2017, 40 permanent plots of 0.25 ha were re−measured in the nature reserves of the Knyszyn and Augustów Forests (NE Poland). The diameter of all trees was measured and the trees of the natural regeneration and bushes up to 1.3 m high were counted. The stand similarity index (S) between successive measurements was calculated. The analysis of differences in the composition of tree stands in subsequent measurements was carried out using Student t and Kruskal−Wallis tests. In the species composition of fresh coniferous forest stands and fresh mixed coniferous forest, there were significant changes in the number and share of Scots pine and Norway spruce. In the Knyszyn Forest a significant decrease in the share of spruce was observed. However, an increase in the share of deciduous species was remarkable. An inhibition of the natural pine renewal process and increase in density of spruce regeneration was observed. It is necessary to emphasize the significant expansion of hornbeam in a fresh mixed deciduous forest in the Knyszyn Forest and expansion of hazel in the Augustów Forest. Mean basal area in the forest stands has increased. The similarity index between the beginning and the end of the research reached the value of 0.73−0.94. The species composition and density of natural regenerations created without human intervention are not satisfactory from the point of view of forest sustainability. The most important factor affecting the direction and rate of changes in the species composition of tree stands is the expansion of hornbeam and/or hazel. These species cause changes in the ecological conditions of the lowest forest layers, leading to the unification of the species composition of forest communities.
Źródło:
Sylwan; 2019, 163, 10; 846-854
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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