خيارات البحث
النتائج 1 - 10 من 47
Response of coniferous ecosystems to reduction of SO2 and NOx emission in last decade in Poland
2002
Staszewski, T. (Institute for Ecology of Industrial Areas, Katowice (Poland)) | Uzieblo, A. | Kubiesa, P. | Lukasik, W. | Szdzuj, J.
Five permanent plots in pine and spruce stands were established at beginning of the 90s. The sites were situated in a gradient of air pollution level, from the south to the north of Poland. There are presented changes in SO2 and NO2 concentration in the air as well as loads of acidic compounds and the exceedance of critical loads in the period of 1993-2001. Response of the forest ecosystems was evaluated by changes in health status of trees and changes in biodiversity at forest permanent plots. The comparative study revealed an improvement in the health condition of trees and a tendency of ecosystems to regenerate due to greater than 30% decrease in emission in the last decade
اظهر المزيد [+] اقل [-]Mapping critical loads in Europe in the framework of the UN/CEE
1993
Hettelingh, J.P. (Institut National pour la Sante Publique et la Protection de l'Environnement, Bilthoven (Pays Bas). Centre de Coordination pour les Effets)
Evidence from nitrogen fertilisation in the forests of Germany
1988
Kenk, G. | Fischer, H. (Forest Research Institute Baden-Wuerttemberg, 7800 Freiburg (Germany, F.R.))
Differences in ability of NO2 absorption in various broad-leaved tree species
1989
Okano, K. | Machida, T. | Totsuka, T. (National Institute for Environmental Studies, Onogawa, Tsukuba, Ibaraki 305 (Japan))
Experimental work related to nitrogen deposition, nitrification and soil acidification - a case study
1988
Nilsson, S.I. | Berden, M. | Popovic, B. (Department of Ecology and Environmental Research, Swedish University of Agricultural Sciences, 750 07 Uppsala (Sweden))
[Atmospheric pollution measurement in France]
1994
Herz, O. (Agence de l'Environnement et de la Maitrise de l'Energie, Paris (France)) | Stroebel, R. | Sommer, M.
Atmospheric pollution at Quebec: 1975-1990
1993
Leduc, R. (Ministere de l'Environnement, Sainte Foy (Canada). Direction de l'Expertise Scientifique) | Bisson, M.
Comparison of emissions of nitrogen and sulfur oxides to deposition of nitrate and sulfate in the USA by state in 1990
1998
Furiness, C. | Smith, L. | Ran, L. | Cowling, E. (North Carolina State University, College of Forest Resources, Raleigh, NC (USA))
Deposition of nitrogen and other major inorganic compounds in Norway, 1992-1996
1998
Toerseth, K. | Semb, A. (Norwegian Institute for Air Research, 2007 Kjeller (Norway))
Responses of spring wheat (Triticum aestivum L.) to ozone produced by either electric discharge and dry air or by UV-lamps and ambient air
1996
Mortensen, L. | Joergensen, H.E. (National Environmental Research Institute, Department of Atmospheric Environment, Frederiksborgvej 399, DK-4000, Roskilde (Denmark))
