خيارات البحث
النتائج 1 - 10 من 15
Transect studies of pine forests along parallel 52 deg. N, 12-32 deg. E and along a pollution gradient in central Europe: general assumptions, climatic conditions and pollution deposition
1997
Breymeyer, A. (Institute of Geography and Spatial Organization, PAS, Twarda 51/55, 00-818 Warsaw (Poland))
Air pollution status of the Bulgarian Govedartsi ecosystem
1997
Zeller, K. | Donev, E. | Bojinov, H. | Nikolov, N. (Rocky Mountain Forest and Range Experiment Station, USDA Forest Service, Ft. Collins, CO (USA))
Anthropogenic impacts on natural nitrogen isotope variations in Pinus sylvestris stands in an industrially polluted area
1997
Jung, K. | Gebauer, G. | Gehre, M. | Hofmann, D. | Weissflog, L. | Schuurmann, G. (Department of Chemical Ecotoxicology, Centre for Environmental Research Leipzig-Halle, P.O. Box 2, D-04301 Leipzig (Germany))
Decomposition of pine-litter organic matter and chemical properties of upper soil layers: transect studies
1997
Breymeyer, A. | Degorski, M. | Reed, D. (Institute of Geography and Spatial Organization PAS, Twarda 51/55, 00-818 Warsaw (Poland))
The influence of air pollutants on needles and stems of Scots pine (Pinus sylvestris L.) trees
1997
Kurczynska, E.U. | Dmuchowski, W. | Wloch, W. | Bytnerowicz, A. (Department of Biophysics and Cell Biology, Silesian University, ul. Jagiellonska 28, 40-034 Katowice (Poland))
Forest health status in Hungary
1997
Szepesi, A. (State Forest Service, H-1054 Budapest, Szechenyi u. 14 (Hungary))
Ectomycorrhizae of young and mature Scots pine trees in industrial regions in Poland
1997
Kieliszewska-rokicka, B. | Rudawska, M. | Leski, T. (Polish Academy of Sciences, Institute of Dendrology, Parkowa 5, 62-035 Kornik (Poland))
Forest health and environmental pollution in Slovakia
1997
Oszlanyi, J. (Institute of Landscape Ecology, Slovak Academy of Sciences, PO Box 254 Stefanikova St., No. 3, 814 99 Bratislava (Slovak Republic))
Effects of elevated O3 and CO2 on chlorophyll fluorescence and gas exchange in Scots pine during the third growing season
1997
Kellomaki, S. | Wang KaiYun (University of Joensuu, Faculty of Forestry, P.O. Box 111, FIN-80101 Joensuu (Finland))
Effect of copper smelting air pollution on the mites (Acari) associated with young Scots pine forests polluted by a copper smelting works at Giogów,Poland. I. Arboreal mites
1997
Seniczak, Stanisław | Dąbrowski, Janusz | DŁUGOSZ, JACEK
The arboreal mites and epiphytes in young Scots pine forests (plant association Leucobryo-Pinetum) polluted by a copper smelting works at Głogów, were investigated. The concentration of heavy metals in Scots pine bark and epiphytes increased towards the pollution source. Copper was accumulated mainly by algae, but lead was accumulated mainly by lichens; these epiphytes accumulated more heavy metals than tree bark. A high concentration of heavy metals was harmful to mites, especially to Oribatida, and to lichens, but algae tolerated these pollutants. The number of oribatid species decreased towards the pollution source, along with the increasing concentrations of heavy metals in tree bark and epiphytes. Among mites, the following categories were distinguished: a) sensitive to heavy metals, b) sensitive to a high concentration but tolerant of small concentrations and c) tolerant of these metals. The mites inhabited mainly the lower section of trees.
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