Acidification Research: Evaluation and Policy Applications: by T. Schneider

By T. Schneider

Plenty of national examine programmes within the box of acidification were conducted within the final decade. specially in Western Europe, wide programmes have ended in an exceptional evaluate of all of the results - in most cases unfavourable - because of acidifying ingredients. there's now consensus that varieties of acidification harm relate to the original geography of a space: pollution impacts plants; acid aerosol the ozone layer. New during this quantity, is the relation among clinical result of built-in examine programmes and coverage activities to avoid, decrease and restrict the frequent harm because of acidification. the result of many alternative nationwide study programmes are evaluated and in comparison to current a different compilation for the examine scientist and coverage maker. during this quantity thematic experiences on particular issues of acidification examine are awarded, by means of overviews of acidification coverage plans and real abatement plans. the result's the easiest overview of acidification examine conducted world wide over the past decade and presentation of the severe relation among study effects and coverage activities.

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However, the lack of consistency in the experimental data makes it difficult to generalise about the significance of this factor in forest decline. - "It is impossible to assess whether current levels of pollutant deposition are increasing, decreasing, or having no effect on tree growth: it is likely that all three possibilities exist on different species in different regions of the CEC . " - "Evidence suggests that pollution may enhance tree sensitivity to other environmental stresses - the most studied example being winter damage.

Summary and conclusions 9. Bibliography 28 1. INTRODUCTION A large number of contributions concerning forest vegetation and acidification have been published. Many papers and books are available which give good reviews about the known facts as well as about of what is known, as well as about the existing gaps and uncertainties. B. , 19901 - Interim Report on Cause-Effect Relationships in Forest Decline [Anonymous, 1990 a] - Proceedings of the 5th Meeting of Acidification Research Coordinators [Anonymous, 1990 b] - Different reports on national research programmes about forest decline and pollution in France, Germany, Netherlands, Finland, Switzerland, US etc.

There is no evidence of a widespread decline in the growth of European forests. - There is much experimental evidence about the form of the cause-effect relationships between pollutants and their impacts on specific processes. Unfortunately, these results cannot be easily extrapolated to field conditions. - There are only a few cases of forest decline for which a plausible explanation of the mechanisms exists. One of them is the yellowing of Norway spruce at higher altitudes on acidic soils in Germany.

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