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EN
Technical elements, such as forest road networks, are inseparable parts of forest ecosystems. The current approach to the layout of a forest road network is largely based on technical and economic solutions and does not include an approach related to the forest ecosystem itself, which should be taken into account in the form of an ecological criterion. The aim of this work was to find out whether inclusion of the ecological criterion in the current method for the layout of a forest road network will affect the construction of forest roads and its economy. The inclusion of the ecological criterion is based on respecting forest stands with a high value of the real potential of forest functions within the accessed area so that these stands would be disrupted as little as possible and the real potential of forest functions would not be reduced considerably in consequence of the construction and use of the forest road network. The forest road network is therefore designed in the stands with a low value of the real potential. Specifically, we examined the changes in parameters of earthwork amount and we analyzed if the changes were statistically significant, and whether the spatial design of the forest road cross profile would change and how this change would be manifested in the construction of forest roads. The results showed that inclusion of the ecological criterion in the construction of forest roads causes only a slight increase in the level of the evaluated parameters of earthwork and thus also economic costs.
PL
Oszacowano biomasę dominujących gatunków drzew sosny, dębu, brzozy w ekosystemie leśnym położonym na złożu węgla brunatnego w Nadleśnictwie Legnica. Stosując wzory empiryczne, obliczono biomasę liści, gałęzi, pni i korzeni, a laku biomasę skumulowaną w ściółce. W tych samych warunkach oszacowano minimalne potrzeby wodne dla sosny, brzozy i dębu.
EN
The biomass of dominant tree species: pine, oak, birch was estimated in the forest ecosystem located on a deposit of brown coal in the Legnica Forest District. According to empirical equations the biomass of leaves, branches, trunks and roots was calculated, as well as the cumulated biomass in litter. ]n the same conditions, minimum water requirements were estimated for pine, birch and oak.
8
Content available remote Turystyczne i rekreacyjne użytkowanie ekosystemów przyrodniczo cennych
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PL
Cechą turystyki jest ciągłe zajmowanie nowych, atrakcyjnych obszarów na potrzeby turystyki i rekreacji. Współczesne trendy mówiące o odchodzeniu od turystyki biernej na rzecz turystyki aktywnej powodują, że nowych obszarów recepcji turystycznej coraz częściej poszukuje się na terenach przyrodniczo cennych. W artykule zwrócono uwagę na konieczność ostrożnego i odpowiedzialnego użytkowania turystycznego ekosystemów przyrodniczo cennych. Autorzy opierają się na przeprowadzonych badaniach terenowych w ekosystemach wodnych i leśnych Puszczy Augustowskiej. W artykule mamy charakterystykę warunków rozwoju turystyki w tych ekosystemach, omówienie negatywnych zachowań prowadzących do degradacji środowiska leśnego i wodnego wraz z określeniem sposobów minimalizacji tego wpływu oraz ocenę możliwości użytkowania turystycznego ekosystemów przyrodniczo cennych na przykładzie Puszczy Augustowskiej.
EN
The study indicates that the ecosystems are not sensibly used in consequence they are endangered with degradation. In accordance with the principles of ecodevelopment the development of tourism is naturally valuable ecosystems should be based on the following premises: - practised forms of tourism should be environmentally friendly, - utilizing ecosystems (aquatic, orest, meadow etc.) it is essential that you do natural valorization and carry out a study of its influence on the environment, - tourism cultivation should not distort the beauty of the landscape
PL
Odkrywkowa działalność górnicza PGE Kopalni Węgla Brunatnego „ Turów" S.A. przyczyniła się do powstania wielkoobszarowych zwałowisk przekształconych geomechanicznie gruntów pokopalnianych. Rekultywacja terenów pogórniczych w Turowie prowadzona od lat 60. XX w. w kierunku leśnym pozwoliła na wypracowanie własnego modelu rekultywacji.Efektem ekologicznym są powstające ekosystemy leśne o charakterze lasu mieszanego wyżynnego z charakterystycznym układem poziomów diagnostycznych właściwym dla gleb leśnych. Do dnia dzisiejszego zrekultywowano 2 609 ha gruntów pogórniczych, z czego 1 942 ha przekazano Lasom Państwowym.
EN
The opencast mine PGE KWB "Turów" contributed to local large-scale landscape ransformations ensued from the dumping grounds. In the period of 60 years of forest reclamation of dumping grounds in "Turów" an own reclamation model was elaborated. The ecological results are forest ecosystems of mixed highland forest with characteristic arrangement of diagnostic levels of the forest soils. Till today total area of reclaimed dumping grounds reached 2 609 he, of which 1 942 he. was acquired by the State Forests.
EN
The integration of carbon captured by forest ecosystems into forest management planning models has become increasingly more important, particularly in the areas of climate change, land use, and sustainable forest management. The main objective of this work is to develop a multiple-use forest management planning model that focuses on the interactions of net carbon sequestration and timber production opportunities in a forest ecosystem including forest openings. The linear programming model is used to develop various forest management scenarios for a forest that yields timber and carbon objectives. The results of forest management planning scenarios showed that increased net carbon sequestration can be attained at a significant cost in terms of forgone timber harvest and financial returns. Results also showed that reforestation of forest openings and long-term protection of forest ecosystems provides high biomass and carbon storage over the planning horizon.
EN
Saproxylic beetles are essential for the proper functioning of forest ecosystems. However, intensive forest management has led to the disappearance of suitable microhabitats of many species associated with dead wood. Cucujus cinnaberinus is an endangered saproxylic beetle which develops under the bark of dead wood. The species usually occurs in protected areas, however, some populations inhabit long-term managed forests in Central Europe. In this study, we analyzed the effect of nine silviculture-related and decay-related factors on the C. cinnaberinus microhabitat selection in managed forests. We found that potential sun exposure, bark thickness, dead wood moisture and the hardness of dead wood have a significant effect on the C. cinnaberinus microhabitat selection. The species prefers sun-exposed dead wood with thicker bark at an intermediate stage of decay with undecomposed xylem, but avoids completely dry pieces. Furthermore, we found no confirmation of a direct connection between dead wood diameter and the occurrence of C. cinnaberinus. We stressed that logging residues or stumps are mostly unsuitable for C. cinnaberinus development.
EN
Net ecosystem production reflects the potential of the ecosystem to sequestrate atmospheric CO2. Daily net ecosystem production of a mountain Norway spruce forest of the temperate zone (Czech Republic) was determined using the eddy covariance method. Growing season days when the ecosystem was a CO2 source were examined with respect to current weather conditions. During the 2005, 2006, and 2007 growing seasons, there were 44, 65, and 39 days, respectively, when the forest was a net CO2 source. The current weather conditions associated with CO2 release during the growing seasons were: cool and overcast conditions at the beginning or end of the growing seasons characterized by a 3-year mean net ecosystem production of -7.2 kg C ha-1 day-1; overcast or/and rainy days (-23.1 kg C ha-1 day-1); partly cloudy and hot days (-11.8 kg C ha-1 day-1); and overcast and hot days (-13.5 kg C ha-1 day-1). CO2 release was the highest during the overcast or/and rainy conditions (84%, average from all years), which had the greatest impact during the major production periods. As forests are important CO2 sinks and more frequent weather extremes are expected due to climate change, it is important to predict future forest carbon balances to study the influence of heightened variability in climatic variables.
EN
The aim of this study was the application of the geo-accumulation index and geostatistical methods to the assessment of forest soil contamination with heavy metals in the Babia Góra National Park (BGNP). For the study, 59 sample plots were selected to refl ect all soil units (soil subtypes) in the studied area and take into account various forms of terrain. The content of organic carbon and total nitrogen, pH, hydrolytic acidity, the base cations and heavy metals content were determined in the soil samples. The geo-accumulation index (Igeo) was calculated, enabling estimation of the degree of soil pollution. The tested soils are characterized by strong contamination with heavy metals, especially with lead. The concentration of heavy metals in the surface horizons of the tested soils exceeds allowable concentration. The content of heavy metals was related to the content of soil organic matter, soil acidity and altitude. Higher altitudes are dominated by coniferous tree stands, which are accompanied by acidic, poorly decomposed organic horizons. Our study has confi rmed the impact of pollutants transported from industrial areas on the amount of heavy metals in soils of the BGNP.
PL
Niniejsze opracowanie opisuje doświadczenia nabyte w ciągu piętnastu lat prowadzenia prac rekultywacyjnych. Zwraca uwagę na niektóre szczegóły formowania gruntu, które mają duże znaczenie w jego stabilizacji. Artykuł wskazuje metody wprowadzania roślinności, których celem jest możliwie szybkie przekształcenie terenów zdegradowanych działalnością górniczą w trwały ekosystem leśny.
EN
The article describes experiences gained during the last 15 years of the reclamation works. It puts the attention on some details of the land formation that have significant importance in its stabilization. The article points the methods of flora implementation that head at the quick post mining land transformation into long lasting forest ecosystem.
EN
The Niepołomice Forest, a large forest complex typical of Central European lowlands, is located near an urban-industrial agglomeration in southern Poland. During the past 20 years, SO₂ emissions from industry decreased from 75,000 t yr⁻¹ to 6000 t yr⁻¹. Concentration of SO₂ in the air, and pH, SO₄⁻² concentration in bulk precipitation were measured during the last 11 years and compared with data from the 1970s. The spatial distribution of concentrations and deposition of S were calculated on the basis of 30 bulk precipitation samples in 1999-2000. Mean annual concentration of SO₂ in the air was 8.25 μg m⁻³ in 2000, that is 2.5 times lower than during the period 1967-1978. At the beginning of the 1990s the concentration of SO₂ exceeded the critical level for plants during 3% of the days over the year, and at the end of the 1990s only on single days. In 1999 and 2000 the yearly mean concentration of S-SO₄⁻² in bulk precipitation in the Niepołomice Forest was 1.11 mg l⁻¹, ranging between 0.99 and 1.27 mg l⁻¹ in the forest complex. The yearly mean sulphur deposition (S-SO₄⁻²) was 8.1 kg ha⁻¹, varying from 7.3 to 8.9 kg ha⁻¹. The present concentrations and deposition of S-SO₄ were a quarter those of 1974-1978. The spatial distribution of S deposition pointed to the influx of S compounds to the Niepołomice Forest with air masses from the west. The yearly mean pH of atmospheric precipitation was 4.64 (1999-2000), and was steady within the forest complex. In the Niepołomice Forest, atmospheric precipitation was more acid recently than in the 1970s.
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