In 1990-1991, five Scots pine forest stands of IV-VI age classes belonging to the Vaccinium, Myrtillus, and Cladonia forest-site type were observed along the atmospheric pollution deposition gradient in Estonia. In 1992, two new sites were added
five trees at each site. The impact of air pollution on the anatomical structure od Scots pine needles was studied in 1992. - (L'A.).
Air temperature ; Biogeochemistry ; Climate ; Ecosystem ; Forest ; Litter ; Pine ; Poland ; Pollution ; Vegetation
covering climatic and pollution gradients is proposed. For the sub-project on litter fall/decomposition some earlier author's results are analysed to show the conditioning of both processes by climate. - (L'A.).
The results of IIASA (Austria) based on forest monitoring programmes indicate that nearly 80% of coniferous and 40% of deciduous forests in Europe suffer from air and soil pollution effects. Satellite observations show that in Central Europe
the currents of polluted air are spread by the wind to a distance of 700 to 800 km. An increase in precipitation acidity has been recorded in western Lithuania. For several months the pH indicator of precipitation was 3.8 to 4.0. In the eastern direction
, the pH indicator becomes more alkaline. This proves that pollutants moved to Lithuania from Western Europe, including neighbouring Poland. - (L'A.).
Congrès ; Coopération internationale ; Ecologie appliquée ; Ecosystème ; Environnement ; Etats-Unis ; Europe centrale ; Europe de l'Est ; Forêt ; Gestion de l'environnement ; Hongrie ; Lituanie ; Méthodologie ; Pin ; Pollution ; Pollution
Applied ecology ; Atmospheric pollution ; Central Europe ; Climatic variability ; Congress ; Czech Republic ; Eastern Europe ; Ecosystem ; Environment ; Environmental management ; Forest ; Hungary ; International cooperation ; Lithuania
; Methodology ; Pine ; Poland ; Pollution ; Soil ; United States of America ; Vegetation
and perspectives of scientific cooperation between Poland and USA in research on effects of climatic changes and increasing levels of environmental pollution on forests ecosystems. The remaining articles are connected with forest monitoring, forest gradient studies
, forest pollution, special methods for forest monitoring. - (DG)
The effects of environmental pollution on Scots pine in the North taiga forests of Russia
Dégradation de l'environnement ; Dégradation de la végétation ; Ecologie appliquée ; Ecosystème ; Forêt ; Kola presqu'île ; Pin ; Pollution ; Russie d'Europe ; Taïga
Applied ecology ; Ecosystem ; Environmental degradation ; European part of Russia ; Forest ; Kola Peninsula ; Pine ; Pollution ; Taiga ; Vegetation degradation
, and weight, either due to the position within the crown or proximity to the source of pollution, was revealed. - (L'A.).
The terrestrial monitoring of forests in the Czech Republic is based on the harmonized methodology of International Co-operative Programme on Assessment and Monitoring of Air Pollution Effects on Forests (UNEP/ECE) and consists of three parts
Degradation of forest ecosystems became widespread throughout the Northern hemisphere in the 1970's. Research projects were developed to clarify the role of air pollution and changes in climatic conditions by using new monitoring methods. Based