خيارات البحث
النتائج 1 - 4 من 4
The environmental situation in Baltic countries and their environmental management strategy.
1994
Kairiukstis L.
Can air pollution influence spruce bark beetle populations in the Central European mountains?
2002
Turcani, M. (Forest Research Institute, Banska Stiavnica (Slovak Republic). Forest Station) | Grodzki, W. | Fleischer, P. | Novotny, J.
Bark beetle populations were estimated periodically each year in 50 ha plots using a series of pheromone traps and through the dissection of 0.5 m sections of infested trees. Data were recorded on several parameters including the volume of infested trees, captures in pheromone traps, number of attacks, and the presence and relative abundance of related bark beetle species. In the period 2000-2001 3 transects were established in the High Tatra Mts., where captures in pheromone traps were recorded and compared with air pollution represented by ozone
اظهر المزيد [+] اقل [-]Environmental regulations of agriculture in the Baltic Sea catchment areas, with reference to the European Union and the North Sea
1994
Bonde, T.A. (Royal Veterinary and Agricultural University, Department of Ecology and Molecular Biology, Microbiology Section, DK-1958 Frederiksberg C., Copenhagen (Denmark))
Soil field data and critical loads near a large point SO2 source in Northernmost Europe
1999
Koptsik, S. | Koptsik, G. (Moscow Univ. (Russia))
