scholarly journals Tree-ring width and Variation of Wood Density in Fraxinus excelsior L. and Quercus robur L. Growing in Floodplain Forests

BioResources ◽  
2017 ◽  
Vol 13 (1) ◽  
Author(s):  
Kyriaki Giagli ◽  
Jan Baar ◽  
Marek Fajstavr ◽  
Vladimír Gryc ◽  
Hanuš Vavrčík
Keyword(s):  
Tree Ring ◽  
Wood Density ◽  
Quercus Robur ◽  
Ring Width ◽  
Fraxinus Excelsior ◽  
Floodplain Forests ◽  
Tree Ring Width

Centroid of wood density, bole eccentricity, and tree-ring width in relation to vector winds in wave forests

1991 ◽  
Vol 21 (1) ◽  
pp. 73-82 ◽  
Author(s):  
Alexander Robertson
Keyword(s):  
Tree Ring ◽  
Wood Density ◽  
Cross Sections ◽  
Ring Width ◽  
Circular Statistics ◽  
Tree Ring Width ◽  
Cross Sectional ◽  
Mean Vector ◽  
Vector Wind ◽  
Densitometric Data

Circular statistics are used to analyse directional data inherent in X-ray densitometric data that pertain to cross-sectional discs sampled from balsam fir wave forest trees at Spirity Cove, Newfoundland. The analysis concentrates on directionality of centroids of mean wood density, bole eccentricity, and tree-ring width in eight directions from the pith. The results show that the centroid of mean wood density, bole cross sections, and mean tree-ring width are significantly directional and correspond closely with the mean vector wind direction.

Intra-annual wood density fluctuations and tree-ring width patterns are sex- and site-dependent in the dioecious conifer Juniperus thurifera L.

Trees ◽  
2015 ◽  
Vol 29 (5) ◽  
pp. 1341-1353 ◽  
Author(s):  
José Miguel Olano ◽  
A. I. García-Cervigón ◽  
A. Arzac ◽  
V. Rozas
Keyword(s):  
Tree Ring ◽  
Wood Density ◽  
Ring Width ◽  
Density Fluctuations ◽  
Tree Ring Width ◽  
Juniperus Thurifera

Climate driven trends in tree biomass increment show asynchronous dependence on tree-ring width and wood density variation

2018 ◽  
Vol 48 ◽  
pp. 40-51 ◽  
Author(s):  
Astrid Vannoppen ◽  
Pascal Boeckx ◽  
Tom De Mil ◽  
Vincent Kint ◽  
Quentin Ponette ◽  
...  
Keyword(s):  
Tree Ring ◽  
Wood Density ◽  
Ring Width ◽  
Density Variation ◽  
Tree Ring Width ◽  
Tree Biomass ◽  
Biomass Increment

Soil moisture as a reliable pedunculate oak (Quercus robur L.) radial growth driver

2021 ◽  
Author(s):  
Saša Kostić ◽  
Wolfgang Wagner ◽  
Tom Levanič ◽  
Tzvetan Zlatanov ◽  
Ernest Goršić ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Tree Ring ◽  
Radial Growth ◽  
Quercus Robur ◽  
Mixed Model ◽  
New Technologies ◽  
Ring Width ◽  
Correlation Technique ◽  
Pedunculate Oak ◽  
Tree Ring Width

<p>New technologies, such as satellites and sensors, provide a wealth of new information about all ecosystems. In dendrochronological studies, all drought-related factors are of great importance for a more comprehensive understanding of associations between radial growth and water loss. Soil moisture directly reflects the wetness of immediate root surroundings, which is vital to the water uptake by trees. Owing to the advances in satellite observation systems and sensors, soil moisture (SM) can be remotely measured, opening new window in dendrochronological research.</p><p>Using the pedunculate oak (Quercus robur L.) lowland SE Europe forests dataset, which count 23 stands and more than 300 tree ring width (TRW) series, we observed reliable associations between satellite-based SM and TRW. Specifically, we observed different TRW−SM patterns based on the precipitation regime. SM in the hottest months (July and August) boosted radial growth, whereas opposite results were noted in the wettest spring months oaks that growing in wetter stands. Unlike oaks from drier and wetter stands that exhibited strong response to SM, those growing on moderately wet (optimal) stands are less sensitive to SM, making these stands optimal oak surroundings.</p><p>On the other hand, by applying a Generalized Additive Mixed Model (GAMM), we noted moderate−weak interactions between TRW series and smoothed SM timescales, with stronger deviations in extreme dry/wet years. Based on the TRW sensitivity to SM findings, which were interpreted via Pearson’s correlation technique and GAMM modeling, strong relations can be inferred, and SM can be labelled as reliable pedunculate oak driver.</p><p><strong>Keywords:</strong> Forestry, Remote sensing, Dendrochronology, Soil moisture, Pedunculate oak, GAMM</p><p><strong>Acknowledgments:</strong> This research was supported by the Science Fund of the Republic of Serbia, PROMIS, #6066697, TreeVita.</p><p><strong>Note:</strong> This contribution is a summary of a study by Kostić S, Wagner W, Orlović S, Levanič T, Zlatanov T, Goršić E, Kesić L, Matović B, Tsvetanov N, Stojanović DB. Different tree-ring width sensitivities to satellite-based soil moisture from drier, moderate and wetter pedunculate oak (Quercus robur L.) stands across a southeastern distribution margin (In press)</p>

scholarly journals Age trends and within-site effects in wood density and radial growth in Quercus faginea mature trees

2016 ◽  
Vol 25 (1) ◽  
pp. 053 ◽  
Author(s):  
Vicelina B. Sousa ◽  
José-Luís Louzada ◽  
Helena Pereira
Keyword(s):  
Tree Ring ◽  
Wood Density ◽  
Ring Width ◽  
Tree Ring Width ◽  
Mature Trees ◽  
High Quality ◽  
Quercus Faginea ◽  
Cambial Age ◽  
Age Trends ◽  
End Uses

Aim of the study: This paper aims to valorize the wood of Quercus faginea Lam. for high quality end uses (e.g. furniture) by studying growth and quality properties using mature trees. Age trends in tree-ring width and wood density are shown and the main factors responsible for variations in tree-ring width and wood density within and between trees are investigated. Area of study: The study site is in the center of Portugal within the natural species distribution area.Material and methods: Radial samples from ten mature trees were collected at 6 heights (from base to 9.7 m) and prepared for X-ray microdensity.Main results: Wood density showed high values, ranging from 0.868 g/cm3 to 0.957 g/cm3. Wood density decreased from pith to bark and with stem height. Cambial age showed a linear relationship with wood density and most of the variation in wood is explained by age. Intra-ring and axial within-tree homogeneity was good.Research highlights: Mature trees of Q. faginea showed high wood density and a high potential for high quality end uses, comparable to other oaks. Wood density is influenced by cambial age and tree-ring width. Wood quality may be improved by tree growth rates adjustment e.g. through an adequate tree stand density (e.g. thinning operations). 

CLIMATE CHANGE, TREE-RING WIDTH AND WOOD DENSITY OF PINES IN MEDITERRANEAN ENVIRONMENTS

IAWA Journal ◽  
2015 ◽  
Vol 36 (3) ◽  
pp. 257-269 ◽  
Author(s):  
Jorge Olivar ◽  
Cyrille Rathgeber ◽  
Felipe Bravo
Keyword(s):  
Tree Ring ◽  
Wood Density ◽  
Pinus Halepensis ◽  
Moving Average ◽  
Wood Quality ◽  
Ring Width ◽  
Growth Period ◽  
Mediterranean Area ◽  
Tree Ring Width ◽  
Pine Species

During the second half of the 20th century, the Mediterranean area has experienced an increase in temperature, and a decrease in precipitation leading to a higher frequency of severe droughts. Consequently, widespread Mediterranean pine species suffered a shift in their climate-growth relationships that might lead to detrimental consequences. Wood features such as wood density are also affected by recent climatic changes producing an effect on wood structure and quality. Tree-ring anatomy was analyzed in three species (Pinus halepensis, P. pinaster and P. sylvestris), the three main pine species in Spain, in order to understand the relationships between tree-ring width and wood density as well as the influence of the climatic variations on these variables. Precipitation influenced tree radial growth and wood density for the three species, but at different times of the growth period. Mean and maximum density followed different patterns for the three species, decreasing with time in P. pinaster and increasing in P. halepensis and P. sylvestris. Growth and mean density trends were followed by a 5-year moving average with low variability in the three species. However, a high variability was observed in the inter-annual trends during the most recent years presumably related to climate. These climate-triggered modifications could adversely effect wood properties and wood quality.

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