Detrending ability of several regression equations in tree-ring research: a case study based on tree-ring data of Norway spruce (Picea abies [L.])

Bošeľa, Michal; Kulla, Ladislav; Marušák, Róbert

doi:10.17221/134/2010-jfs

Cited by 8 publications

(4 citation statements)

References 21 publications

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“…Prior to our analyses, our core data and the stand level growth needed to be standardized to a dimensionless time series in order to remove any trends caused by the different ages of the five plots or by the tree size as well as stand dynamics [56]. For this purpose we used a smoothing cubic spline function [57][58][59], which is a flexible smoothing procedure based on polynomials [60]. This was done within the package dplR [61] in statistical program R, version 3.…”

Section: Detrending Proceduresmentioning

confidence: 99%

Drought Resistance of Norway Spruce (Picea abies [L.] Karst) and European Beech (Fagus sylvatica [L.]) in Mixed vs. Monospecific Stands and on Dry vs. Wet Sites. From Evidence at the Tree Level to Relevance at the Stand Level

Rukh

Poschenrieder

Heym

et al. 2020

Forests

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Frequency of drought years is expected to increase through climate warming. Mixed stands have often shown to be more productive than monospecific stands in terms of yield and of resistance against windthrows and bark beetle attacks. Mixture of beech and spruce is of particular interest. However, little is known about its growth reaction to drought. Therefore, we investigated the drought reaction of beech and spruce in mixed vs. monospecific stands along an ecological gradient. In particular, we sought evidence for mixture-related resilience on the individual tree level. Therefore, we quantified the response of tree ring width to drought. Moreover, we attempted to explain the relevance of individual tree response on the stand level by quantifying the stand level loss of volume growth after drought. At the individual tree level, beech was found to be more resilient and resistant in pure vs. mixed stands. Spruce, in contrast, was favored by mixture, and this was especially evident on drier sites. Along the gradient, growth losses at stand level increased in both mixed and pure stands in 2015, with growth gains on the drier sites observed in the same drought year, in accordance with the Stress Gradient Hypothesis. However, the stand level difference of growth loss between mixed and pure stands was not statistically significant. Mitigating mixture effects on the level of the individual tree thus did not become evident on the level of the whole stand.

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Section: Detrending Proceduresmentioning

confidence: 99%

Drought Resistance of Norway Spruce (Picea abies [L.] Karst) and European Beech (Fagus sylvatica [L.]) in Mixed vs. Monospecific Stands and on Dry vs. Wet Sites. From Evidence at the Tree Level to Relevance at the Stand Level

Rukh

Poschenrieder

Heym

et al. 2020

Forests

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“…Assuming, in the null hypothesis, that variables have no influence on the age-increment relationship, we chose the Hugershoff equation for the age-increment model. The Hugershoff equation is, in addition to being biologically meaningful [49], easy to linearize and can therefore be handled with standard regression methods. We chose the individual tree basal area growth iba (m 2 /year) as our measure for tree increment because, in contrast to diameter increment, it directly represents information about biological production [50].…”

Section: Performance Of Growth Level Within and Beyond The Natural Rangementioning

confidence: 99%

Impact of Climate Trends and Drought Events on the Growth of Oaks (Quercus robur L. and Quercus petraea (Matt.) Liebl.) within and beyond Their Natural Range

Perkins

Uhl

Biber

et al. 2018

Forests

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Due to predicted climate change, it is important to know to what extent trees and forests will be impacted by chronic and episodic drought stress. As oaks play an important role in European forestry, this study focuses on the growth response of sessile oak (Quercus petraea (Matt.) Liebl.) and pedunculate oak (Quercus robur (L.)) under contrasting climatic conditions. Analyses cover both site conditions of their natural occurrence (Southern Germany and Northeast Italy) and site conditions beyond their natural range (South Africa). The sites beyond their natural range represent possible future climate conditions. Tree-ring series from three different sites were compared and analysed using dendrochronological methods. The long-term growth development of oak trees appears to be similar across the sites, yet the growth level over time is higher in the drier and warmer climate than in the temperate zone. When compared with previous growth periods, growth models reveal that oak trees grew more than expected during the last decades. A recent setback in growth can be observed, although growth is still higher than the model predicts. By focusing on the short-term reactions of the trees, distinct drought events and periods were discovered. In each climatic region, similar growth reactions developed after drought periods. A decline in growth rate occurred in the second or third year after the drought event. Oaks in South Africa are currently exposed to a warmer climate with more frequent drought events. This climatic condition is a future prediction also for Europe. In view of this climate change, we discuss the consequences of the long-and short-term growth behaviour of oaks grown in the climate of South Africa for a tree species selection that naturally occurs in Europe.

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“…While many different forms of models have been presented for the relationship between ring width and age (or equivalently time), the commonly used Hugershoff (1936) (cit Peschel 1938) curves (Eq. 1) have often been reported as being the most robust (Fang et al 2010, Bošeľa et al 2011). …”

Section: Introductionmentioning

confidence: 99%

Radial variation in selected wood properties of three cypress taxa

Todoroki

Low

McKenzie³

et al. 2015

N.Z. j. of For. Sci.

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Background: New Zealand-grown cypresses are typically harvested at 35-40 years of age; however, shorter rotations have been proposed. The objective of this study was to evaluate the feasibility of producing structural products from shorter rotations through examination of wood properties of younger cypress trees. A detailed examination of radial wood property trends was necessary, and the first ring-level models for three cypress taxa were developed because there were no predictive wood property models available.

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Detrending ability of several regression equations in tree-ring research: a case study based on tree-ring data of Norway spruce (Picea abies [L.])

Cited by 8 publications

References 21 publications

Drought Resistance of Norway Spruce (Picea abies [L.] Karst) and European Beech (Fagus sylvatica [L.]) in Mixed vs. Monospecific Stands and on Dry vs. Wet Sites. From Evidence at the Tree Level to Relevance at the Stand Level

Drought Resistance of Norway Spruce (Picea abies [L.] Karst) and European Beech (Fagus sylvatica [L.]) in Mixed vs. Monospecific Stands and on Dry vs. Wet Sites. From Evidence at the Tree Level to Relevance at the Stand Level

Impact of Climate Trends and Drought Events on the Growth of Oaks (Quercus robur L. and Quercus petraea (Matt.) Liebl.) within and beyond Their Natural Range

Radial variation in selected wood properties of three cypress taxa

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