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By F. Haemmerli, R. Schlaepfer (auth.), Dr. habil Reinhard F. Huettl, Professor. Dr. Dieter Mueller-Dombois (eds.)

Forest harm, wooded area decline, wooded area dieback - no longer regarding biotic brokers - is happening within the Atlantic and Pacific areas. In Europe and jap North the US this major problem is taken into account to be, a minimum of to a few half, with regards to business air toxins and their atmospheric conversion items, comparable to acid rain or ozone. woodland declines within the Pacific area were attributed principally to normal reasons concerning woodland dynamics, for the reason that pollution and different unfavorable anthropogenic affects are virtually absent. awarded listed here are general decline phenomena within the Pacific and Atlantic area, capability motives, results and mitigation suggestions, and the query no matter if there are any similarities on a practical or structural foundation is addressed.

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In most of the cases where the diagnosis of the currently observed decline is unambiguous (death of groups of trees and of stands), we could find old descriptions which are very similar to contemporary accounts. In the case of fir, the first explicit mention of decline concerns the Vosges in the late 1940s. Fourchy (1951) described the consequences of the exceptional droughts of the years 1942-1949 on agricultural crops and forests thus: "the older (forest) stands have not been spared, although woody plants are in general less sensitive to water stress than agricultural crops.

E. France). In: Bucher JB, Bucher-Wallin I (eds) Air pollution and forest decline, 14th IUFRO Int Meet, Interlaken, Switzerland, 2-8 Oct 1988. ) dans Ie massif du Jura: etude phytoecologique et dendrochronologique. ) dans Ie Jura. Etude dendroecologique. Ann Sci For 47:395-412 Boisseau T (1986) Influence de I'origine genetique (landaise ou iberique) des peuplements de Pin maritime sur les degilts causes par Ie froid de janvier 1985 au massif forestier aquitain. ENITEF, Nogent-sur-Vernisson, 90 pp Bonneau M (1989) Etude de la nutrition minerale du sapin et d'epiceasjaunissants du Jura central et meridional.

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