Aspect des houppiers et croissance des arbres au cours des dernières décennies dans les régions frontalières d'Allemagne,de France et de Suisse

Becker, Michel; Bräker, O. U.; Kenk, G.; Schneider, O.; Schweingruber, Fritz Hanz

doi:10.4267/2042/26075

Cited by 9 publications

(4 citation statements)

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“…The strong, negative impact of the exceptionally dry growth season in 1976 on the growth of trees in north-western Europe is well documented (e.g. Aussenac, 1978;Becker et al, 1990). In order to assess if the other recent growth depressions can also be explained by adverse climatic conditions, general growth±climate relationships were investigated.…”

Section: Ring Widthmentioning

confidence: 99%

Ring width and element concentrations in beech (Fagus sylvatica L.) from a periurban forest in central Belgium

Penninckx

Meerts

Herbauts

et al. 1999

Forest Ecology and Management

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The Fore Ãt de Soignes is a beech high forest located near Brussels (Belgium), established on a strongly acidic soil and subjected to atmospheric pollution and recreational pressure. We investigated variations in ring width and mineral element concentrations (N, P, K, Ca, Mg, Mn, Al) over the last 95 years in ®ve 135-year-old trees, variations in ring width in four 40-year-old trees and tested associations with climatic parameters. Growth curves showed a striking increase in mean sensitivity in the last 20 years in the old trees but not in the young ones, starting with the 1976 summer drought. Mean sensitivity is a statistical measure of the mean relative variability between adjacent ring widths within a tree, which is correlated to susceptibility to climatic stress (Fritts, H.C., 1976. Tree Rings and Climate, Academic Press, London, 567pp). May rainfall and, to a lesser extent, soil water recharge (i.e. pooled rainfall from October to May) correlated signi®cantly with ring width. However, two of the ®ve growth depressions in the last 20 years could not readily be accounted for by adverse climatic conditions. Element concentration pro®les were suggestive of a decrease in the availability of Mn, Mg and Ca, but no trend of increasing N was obvious. The possible causes of the recent increase in sensitivity of old beech trees are discussed in terms of interactions between ageing and extreme climatic events, aggravated by soil compaction due to logging traf®c. # 1999 Elsevier Science B.V. All rights reserved.

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Section: Ring Widthmentioning

confidence: 99%

Ring width and element concentrations in beech (Fagus sylvatica L.) from a periurban forest in central Belgium

Penninckx

Meerts

Herbauts

et al. 1999

Forest Ecology and Management

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“…In each subset the ring values of each sampling height group were averaged. Regional Curve Standardisation (RCS), used to preserve as much low-frequency variability as pos- sible in tree-ring chronologies (Mitchell 1967;Becker et al 1995Becker et al , 1990Esper et al 2003), is an advanced method of tree-ring de-trending. A test with RCS-type indexing was conducted to avoid differences within and between the subsets and to eliminate aging effects (improving signal/noise ratio).…”

Section: Methodsmentioning

confidence: 99%

Growth Reactions of Sub-Alpine Norway Spruce (Picea abies (L.) Karst.) Following One-Sided Light Exposure (Case Study at Davos “Lusiwald”)

Bräker

Baumann

2006

Tree-Ring Research

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In 1982, several rectangular openings were cut in a 100 year old sub-alpine Norway spruce forest stand to initiate regeneration at the Lusiwald site at Davos, Switzerland. The openings on the steep, northfacing slope created rapid changes to the environment of the border trees. Growth reactions of these border trees were compared and analysed with reference trees from the adjacent closed canopy stand in 1997. The radial growth pattern of the two data sets differed within the 14-year period since the openings were cut; the border trees showed growth releases. The growth reaction at the stem base was larger than at breast height. Changes in wind exposure may have influenced border trees to adapt their root systems. Sub-alpine Norway spruce stands aged around 100 years, which are usually considered slow-growing on a north aspect, still seem capable of reacting to greater resource availability such as sudden light changes.

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“…Sur le territoire européen, plusieurs résultats montrent une tendance à l'augmentation de la productivité des forêts à long terme au cours du siècle dernier pour plusieurs espèces couvrant une grande amplitude géographique (Hari et al, 1984;Becker et al, 1990;Kauppi et al, 1992;Bert, 1992;Briffa, 1992;Eriksson et Johansson, 1993;Badeau et al, 1995;Becker et al, 1995;Spiecker et al, 1996;Vaganov, 1996). Ces recherches étaient réalisées généralement dans des forêts aménagées par l'homme depuis quelques siècles.…”

Section: Tendances Observées En Europe Et En Amérique Du Nordunclassified

Tendance à long terme de la croissance de l épinette noire (Picea mariana (Mill ) B S P ) en forêt boréale québécoise

Gagné¹

2000

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Aspect des houppiers et croissance des arbres au cours des dernières décennies dans les régions frontalières d'Allemagne,de France et de Suisse

Cited by 9 publications

References 0 publications

Ring width and element concentrations in beech (Fagus sylvatica L.) from a periurban forest in central Belgium

Ring width and element concentrations in beech (Fagus sylvatica L.) from a periurban forest in central Belgium

Growth Reactions of Sub-Alpine Norway Spruce (Picea abies (L.) Karst.) Following One-Sided Light Exposure (Case Study at Davos “Lusiwald”)

Tendance à long terme de la croissance de l épinette noire (Picea mariana (Mill ) B S P ) en forêt boréale québécoise

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