Growth-ring boundaries of tropical tree species: Aiding delimitation by long histological sections and wood density profiles

Quintilhan, Manolo Trindade; Santini, L.; Rodríguez, Daigard Ricardo Ortega; Guillemot, Joannès; Cesilio, Gabriella Hita Marangom; Chambi-Legoas, Roger; Nouvellon, Yann; Filho, Mário Tomazello

doi:10.1016/j.dendro.2021.125878

Cited by 26 publications

(8 citation statements)

References 70 publications

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“…Of the 17 scanned species only 4 have distinct boundaries. X-ray µCT is sensitive to density variations [ 42 , 43 ], thus an observed difference in density can be misinterpreted as a distinct growth ring.…”

Section: Discussionmentioning

confidence: 99%

Non-destructive wood identification using X-ray µCT scanning: which resolution do we need?

Dierickx,

Genbrugge,

Beeckman

et al. 2024

Plant Methods

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Background Taxonomic identification of wood specimens provides vital information for a wide variety of academic (e.g. paleoecology, cultural heritage studies) and commercial (e.g. wood trade) purposes. It is generally accomplished through the observation of key anatomical features. Classic methodologies mostly require destructive sub-sampling, which is not always acceptable. X-ray computed micro-tomography (µCT) is a promising non-destructive alternative since it allows a detailed non-invasive visualization of the internal wood structure. There is, however, no standardized approach that determines the required resolution for proper wood identification using X-ray µCT. Here we compared X-ray µCT scans of 17 African wood species at four resolutions (1 µm, 3 µm, 8 µm and 15 µm). The species were selected from the Xylarium of the Royal Museum for Central Africa, Belgium, and represent a wide variety of wood-anatomical features. Results For each resolution, we determined which standardized anatomical features can be distinguished or measured, using the anatomical descriptions and microscopic photographs on the Inside Wood Online Database as a reference. We show that small-scale features (e.g. pits and fibres) can be best distinguished at high resolution (especially 1 µm voxel size). In contrast, large-scale features (e.g. vessel porosity or arrangement) can be best observed at low resolution due to a larger field of view. Intermediate resolutions are optimal (especially 3 µm voxel size), allowing recognition of most small- and large-scale features. While the potential for wood identification is thus highest at 3 µm, the scans at 1 µm and 8 µm were successful in more than half of the studied cases, and even the 15 µm resolution showed a high potential for 40% of the samples. Conclusions The results show the potential of X-ray µCT for non-destructive wood identification. Each of the four studied resolutions proved to contain information on the anatomical features and has the potential to lead to an identification. The dataset of 17 scanned species is made available online and serves as the first step towards a reference database of scanned wood species, facilitating and encouraging more systematic use of X-ray µCT for the identification of wood species.

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Section: Discussionmentioning

confidence: 99%

Non-destructive wood identification using X-ray µCT scanning: which resolution do we need?

Dierickx,

Genbrugge,

Beeckman

et al. 2024

Plant Methods

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“…The two cores taken from each sampled tree were processed and measured in the tree-ring and wood anatomy laboratory at the University of São Paulo, Brazil. Initially, densitometry profiles were generated in an X-ray densitometry chamber (Faxitron X-Ray, Wheeling, IL, USA), with a measurement unit scale and a cellulose acetate wedge to calibrate wood density, according to established protocols [23,24]. Each radiographed sample was cross-dated to extract the annual density profile.…”

Section: Series Of Carbon Capture and Statistical Analysismentioning

confidence: 99%

Rates of Stemwood Carbon Accumulation Are Linked to Hydroclimate Variability in Mexican Conifers

Pompa-García

Vivar-Vivar

Camacho

et al. 2023

Forests

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Evapotranspiration demand has increased rapidly as temperatures have risen, affecting forest productivity. Consequently, carbon (C) uptake by forests is being modified; therefore, a more refined knowledge of the relationships between C capture and hydroclimate variability is required, particularly in drought-prone regions. In this study, we analyzed the relationships between climate and C capture as stemwood through the dendroecological analyses of radial growth in 15 conifer species distributed along a broad bioclimatic gradient in Mexico. The C content was calculated using densitometry data; correlations and mixed models were then used to determine the influence of climatic variables (precipitation, mean maximum and minimum temperatures, SPEI drought index) on tree growth. Each species showed specific responses to the climate with Taxodium mucronatum being the most responsive species. Both precipitation and maximum temperature best explained changes in C capture, with minimum temperature and SPEI playing secondary roles. The winter before the growth period was the most important season for C capture, particularly through positive responses to wet-cool conditions. However, the climatic influences of the current fall and summer were also notable. Seasonal climatic influences have implications for C uptake and forest productivity in the face of the severe droughts that repeatedly affect the study region.

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“…Due to environmental and genetic factors, tree species may exhibit varying growth rhythms at different stages of their life. Tree ring width decreases with cambial age, increases in height in young trunks, and reduction in apical growth in young trunks [9]. However, they tend to stabilize with age while preserving their anatomical characteristics.…”

Section: Introductionmentioning

confidence: 97%

The Climate Change Influence on Cedrela odorata L. Radial Growth in the Amazon

Da Costa,

Pinheiro,

Latorraca

et al. 2023

Sustainability

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Half of the Amazon Forest, which has a marked seasonality in rainfall, is susceptible to intense droughts caused by positive phases of the El Niño-Southern Oscillation (ENSO). Cedrela odorata L., sensitive to climate variations, emerges as a promising candidate for studies on how trees respond to climate change. Given the demand for its wood and the imperative for its protection in the Amazon Biome, applying the principles of environmental sustainability becomes crucial. This study characterizes local climatic variables near the Amazon River and assesses their impact, as well as the effect of ENSO, on the radial growth of Cedrela odorata using Pearson correlation analyses. Ring synchronization followed the standard methodology in dendrochronology, confirming common growth patterns and the formation of growth rings in C. odorata. Significant correlations with growth were noted concerning local climate, with negative associations for maximum and average temperatures and evapotranspiration, and a positive correlation with relative air humidity. ENSO exhibited a significant negative correlation with growth rings, indicating reduced growth during El Niño events. The species is notably sensitive to water availability, particularly at the onset of the growth period. The study concludes that the growth of C. odorata in the Óbidos-PA microregion responds to climate change.

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Growth-ring boundaries of tropical tree species: Aiding delimitation by long histological sections and wood density profiles

Cited by 26 publications

References 70 publications

Non-destructive wood identification using X-ray µCT scanning: which resolution do we need?

Non-destructive wood identification using X-ray µCT scanning: which resolution do we need?

Rates of Stemwood Carbon Accumulation Are Linked to Hydroclimate Variability in Mexican Conifers

The Climate Change Influence on Cedrela odorata L. Radial Growth in the Amazon

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