Spatial patterns of central European pointer years from 1901 to 1971

Neuwirth, Burkhard; Schweingruber, Fritz Hans; Winiger, Matthias

doi:10.1016/j.dendro.2006.05.004

Cited by 112 publications

(108 citation statements)

References 27 publications

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“…Pointer years have been determined when the tree-ring width deviated by 40% from the long-term trend, using a 13-year moving average (Cropper 1979;Bonn 1998;Neuwirth et al 2007). For the climate analyses, a two-step-standardisation method was conducted by applying linear regressions and cubic smoothing splines to the mean series.…”

Section: Discussionmentioning

confidence: 99%

Climate change impacts on stand structure and competitive interactions in a southern Swedish spruce–beech forest

et al. 2009

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It is believed that European beech (Fagus sylvatica L.) will increase its competitive ability at its northern range margin in Scandinavia due to climate change. In mixed old-growth forests of beech and Norway spruce (Picea abies (L.) Karst.) at Siggaboda nature reserve (southern Sweden), stand structure characteristics were sequentially recorded in the years 2004, 2005 and 2007 as well as growth in stem diameter using tree-coring analyses. Using these measurements, we studied the effects on stand dynamics of an extreme storm event (2005 ''Gudrun'' hurricane), drought and heat (mid-summer 2006, spring 2007) and subsequent bark beetle attacks on spruce (growing season 2007), overlaid with warming tendencies. The storm, which caused disastrous damage in many stands nearby, had comparatively little impact on the structure of the spruce-beech stand. All together, only 32 trees (19 spruces, 10 beeches, 3 other species) per hectare were thrown or broken mainly in the leeward direction (NE) or impacted by secondary damage by uprooted neighbour trees; this represents 7% of the total tree number and 11% of the growing stock. Diameter and height structure did not change significantly. However, the 2006 drought and the 2007 attack of biotic agents changed the stand structure and composition strongly due to the death of about 19% of the dominating older spruce trees that accounted for 35% of total stand volume. This resulted in a considerable increase in beech's contribution to stem number (4% increase) and wood volume of the living stand (7% increase). A comparison of diameter growth of beech and spruce during the periods 1894-1949 and 1950-2005 showed a distinct decrease in growth superiority of spruce during the last 50 years. These results support the idea of a northward migration of European beech as a nemoral tree species in Sweden, due to a higher tolerance to the abiotic and biotic threats accompanying climate change and an increased competitive ability compared to boreal tree species Norway spruce.

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Section: Discussionmentioning

confidence: 99%

Climate change impacts on stand structure and competitive interactions in a southern Swedish spruce–beech forest

et al. 2009

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“…Three intensity classes of pointer years (i.e. weak, strong and extreme) were considered after Neuwirth et al (2007).…”

Section: Statistical Analysesmentioning

confidence: 99%

Tapping the tree-ring archive for studying effects of resin extraction on the growth and climate sensitivity of Scots pine

et al. 2017

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“…Cropper's method (Cropper, 1979) as described in Neuwirth et al (2007). A pointer year was 121 defined as positive (or negative) when the normalized Cropper's values of at least 50% of the 122 trees were larger (or smaller) than +1 (or −1).…”

mentioning

confidence: 99%

Increased tree-growth synchronization of beech (Fagus sylvatica L.) in response to climate change in northwestern Europe

2015

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Please cite this article as: Latte, N., Lebourgeois, F., Claessens, H.,Increased tree-growth synchronization of beech (Fagus sylvatica L.) in response to climate change in northwestern Europe, Dendrochronologia (2015), http://dx.doi.org/10.1016/j.dendro. 2015.01.002 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. responded to climate change, we selected 12 sites (137 trees) with optimal growing conditions 20 along a W−E altitudinal gradient (67-590 m) in Belgium. We evaluated temporal changes in 21 growth response to climate by using pointer year analysis, moving mean sensitivities (1860-22 2011), and moving bootstrapped correlation coefficients . The strongest driving 23 climatic variables were identified by using the partial least squares method. 24The common patterns of growth trends, pointer years, and mean sensitivities among sites 25 provided evidences for the impact of environmental changes operating at a regional scale. The 26 results of growth-climate analysis indicated that these changes were strongly influenced by 27 the climatic conditions of the previous year. The climate sensitivity of beech increased 28 progressively in response to more frequent and intense heat waves and warming-related 29 droughts, especially during recent decades, leading to remarkable inter-site synchronization. 30The changes were much more pronounced for sites located in lowlands (<300 m). The 31 differences in growth responses along the altitudinal gradient and the consequences of 32 warming for beech growth and physiology are discussed. 33

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Spatial patterns of central European pointer years from 1901 to 1971

Cited by 112 publications

References 27 publications

Climate change impacts on stand structure and competitive interactions in a southern Swedish spruce–beech forest

Climate change impacts on stand structure and competitive interactions in a southern Swedish spruce–beech forest

Tapping the tree-ring archive for studying effects of resin extraction on the growth and climate sensitivity of Scots pine

Increased tree-growth synchronization of beech (Fagus sylvatica L.) in response to climate change in northwestern Europe

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