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Wyszukujesz frazę "Deforestation" wg kryterium: Wszystkie pola


Wyświetlanie 1-3 z 3
Tytuł:
Wylesienia i rekultywacje gruntów w kierunku leśnym planowane w Polsce do roku 2030
Deforestation and land reclamation into forests planned in Poland up to 2030
Autorzy:
Referowska-Chodak, E.
Powiązania:
https://bibliotekanauki.pl/articles/989009.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
ksztaltowanie przestrzeni
wylesienia
gminy
plany wylesien
rekultywacja gruntow
rekultywacja lesna
powiaty
plany rekultywacji
ochrona krajobrazu
Panstwowe Gospodarstwo Lesne Lasy Panstwowe
deforestation
forest reclamation
afforestation
landscape protection
state forests
Opis:
The aim of the study is to present – in the perspective of up to 2030 – plans about deforestation in the area administered by the State Forests, formulated at the level of communes and judged on the level of provinces (voivodeships), as well as plans for land reclamation into forests, formulated at the level of counties. The data was collected in 2013−2014 in a survey, which included the following groups of respondents: mayors of all rural and urban−rural communes, heads of all rural counties and marshals of provinces. According to information provided by 34.4% of communes, it is planned to cease the production on at least 517.1 hectares of forests, located in 64 forest districts. In relation to requests for deforestation, marshals of provinces presented various approach to their assessment, but always within the limits of applicable law. On the other hand, according to the data provided by 57.3% of counties, land reclamation into forests is planned to reach at least 498 hectares in 57 forest districts. Deforestation and forest reclamation affect both the landscape and the level of forest cover of the country. The results show a greater concern of commune heads about deforestation than it is in the case of heads of counties about land reclamation into forests. The balance in these activities proportion would be at least a positive natural, economic and social achievement. The processes of deforestation, afforestation, forest management and land restoration into forests – directly affecting the quality of the landscape – are important for assessing the implementation of the European Landscape Convention in Poland. Taking into account the current level of afforestation in Poland, it is unlikely to achieve the forest cover of 33% by 2050. Therefore, it is important to control the size of deforestation and to increase the scope and pace of land reclamation into forests.
Źródło:
Sylwan; 2017, 161, 02; 163-169
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ wylesień na krótkoterminowe zmiany składu chemicznego wody w zlewni Potoku Malinowskiego (Beskid Śląski)
Influence of deforestation on short-term changes in the chemical composition of water in the Malinowski Stream catchment (southern Poland)
Autorzy:
Kosmowska, A.
Żelazny, M.
Małek, S.
Siwek, J.P.
Powiązania:
https://bibliotekanauki.pl/articles/989906.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
gory
Beskid Slaski
wylesienia
zlewnia Potoku Malinowskiego
wody plynace
sklad chemiczny
zmiany skladu chemicznego
streamwater chemistry
sulfur
nitrogen
flood events
deforestation
Opis:
The aim of the study was to determine the effect of deforestation caused by environmental pollution on the chemical composition of stream waters draining the small catchments located in the Skrzyczne massif (Beskid Śląski, southern Poland). In the 1950−60s this area was subjected to heavy anthropogenic pressure with excessive deposition of sulfur and nitrogen compounds. It resulted in the damage to the stands and deforestation of the ridge fragments of the studied area. The study was conducted in the catchment of the Malinowski Stream and its two subcatchments: forested and deforested in 2013. Waters of the studied streams characterized by low conductivity and mineralization. In the ridge subcatchments they were slightly acidic and in the main catchment – slightly alkaline. In all catchments anions were predominated by sulfates – with the largest in the deforested catchment (31% mval/L). Also nitrates had very large share in the structure of the chemical composition of water, particularly in the forested catchment (15% mval/L). Interestingly, there were low levels of bicarbonates, particularly in the ridge catchments, with their share lower than sulfates and nitrates. Cations in all streams were predominated by calcium. The structure of the chemical composition of water of the Malinowski Stream, expressed by the average share of individual ions was as follows: SO4−HCO3−NO3−Cl−F−Ca−Na−Mg−K−NH4, and in the case of streams draining small ridge catchments: – SO4−NO3−HCO3−Cl−F−Ca−Na−Mg−K−NH4. Conductivity of water decreased together with increased water levels in streams during floods. In the deforested catchment this decrease was more evident. The reaction of nitrate concentration to the increase in water level was however different, as in the stream draining the forested catchment it decreased sharply, while in the deforested catchment it decreased slightly or remained at the similar level. In the dry periods the chemical composition of waters of the examined streams were subject to far less change than during the floods, with the changes of e.g. conductivity being much higher in the stream draining the forested catchment.
Źródło:
Sylwan; 2015, 159, 09; 778-790
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ wiatrołomu i degradacji drzewostanu na zróżnicowanie chemizmu wód w zlewni Potoku Kościeliskiego w obszarze Tatrzańskiego Parku Narodowego
Effect of wind damage to tree stands on spatial differences in water chemistry in the Koscieliski Stream catchment in the Tatra National Park
Autorzy:
Żelazny, M.
Siwek, J.P.
Fidelus, J.
Stańczyk, T.
Siwek, J.
Rutkowska, A.
Kruk, P.
Wolanin, A.
Jelonkiewicz, L.
Powiązania:
https://bibliotekanauki.pl/articles/987105.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
parki narodowe
Tatrzanski Park Narodowy
wiatrolomy
degradacja drzewostanow
wylesienia
zlewnie rzek
zlewnia Potoku Koscieliskiego
wody odplywowe
sklad chemiczny
azotany
zmiany skladu chemicznego
water chemistry
nitrate
deforestation
tatra national park
Opis:
The study focused on the effects of deforestation by heavy winds and tree stand damage produced by bark beetle invasion on water chemistry of mountainous catchment of Kościeliski Stream in the Tatra National Park (southern Poland). 200 samples of stream and spring water were collected in three series: in July, August and October 2015. Water samples obtained from areas characterized by tree stand damage caused by heavy winds were found to have much higher mean concentration of nitrate (15.44 mg/L) as well as a much higher overall mean nitrate content (3.44% mval/L) than samples obtained from non−deforested areas (3.26 mg/L and 0.78% mval/L). The increase in nitrate concentration and its share in overall water chemistry was high enough that the anion sequence for the deforested areas became altered from HCO3>SO4>NO3>Cl to HCO3>NO3> SO4>Cl. The mean change in water nitrate concentration in areas with tree stands damaged by the bark beetle was smaller (6.17 mg/L; 1.60% mval/L) than that for areas deforested by wind. The concentration of NO3 – in stream water in deforested areas varied more than that in stream water in non−deforested areas.
Źródło:
Sylwan; 2017, 161, 01; 27-33
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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