Biochemical composition is not the main factor influencing variability in carbon isotope composition of tree rings

Eglin, Thomas; Maunoury-Danger, Florence; Fresneau, Chantal; Lelarge, Caroline; Pollet, Brigitte; Lapierre, Catherine; François, Christophe; Damesin, Claire

doi:10.1093/treephys/28.11.1619

Cited by 24 publications

(19 citation statements)

References 43 publications

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“…The isotopic composition of whole-wood was compared with that of cellulose in larger samples to establish the relationship between the two. They typically show similar patterns in d 13 C with somewhat higher values in cellulose (Helle and Schleser 2004;Loader et al 2003, Verheyden et al 2005Harlow et al 2006;Eglin et al 2008). This was confirmed for the series of Carapa and Goupia that were used for this comparison (Fig.…”

Section: Resultssupporting

confidence: 74%

Identification of anatomically non-distinct annual rings in tropical trees using stable isotopes

Pons

Helle

2010

Trees

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Annual rings are generally not anatomically distinct in trees growing in the humid tropics. The possibility to use radial variation in stable isotopes (d 18 O and d 13 C) for the identification of annual rings in these trees was investigated in two species growing in the tropical rainforest of Central Guyana, Carapa guianensis and Goupia glabra. The climate is characterised by an annual precipitation of 2,700 mm that is distributed over two rainy and two dry seasons. Cores were taken from trees of measured diameter increment rates. High-resolution tangential sections in radial direction were dissected from these cores and isotopic ratios were measured on whole wood. Variation in d 13 C was about 1% at an annual scale, whereas d 18 O showed two to four times larger annual excursions. The minima in d 18 O were selected as primary indicators of annual boundaries at the main wet season when also d 18 O of precipitation water has its minimum. The minima in d 13 C coincided often with these. The simultaneous occurrence is consistent with increased discrimination against 13 C at high water availability. They were used as secondary criteria. Annual rings could thus be identified with reasonable certainty in both species from radial variation in isotopic ratios as verified with measured diameter increment rates. The short sequence covered in the analysis did not show clear correlation with the available precipitation data for the area. The method supplemented with other dating methods may prove to be practically useful for identifying annual rings and applying classical dendrochronology when more cost effective automatic sampling devices become available.

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Section: Resultssupporting

confidence: 74%

Identification of anatomically non-distinct annual rings in tropical trees using stable isotopes

Pons

Helle

2010

Trees

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“…In contrast, d 13 C values measured with the IRMS system were obtained from extracted cellulose. Several studies have demonstrated an offset between d 13 C of whole wood and cellulose, which is constant and independent of season (Livingston and Spittlehouse 1996;Borella et al 1998;Leuenberger et al 1998;Eglin et al 2008).…”

Section: Carbon Isotopesmentioning

confidence: 99%

Discrete versus continuous analysis of anatomical and δ13C variability in tree rings with intra-annual density fluctuations

Micco

Battipaglia

Brand

et al. 2011

Trees

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Intra-annual density fluctuations (IADFs) are anomalies of tree rings where wood density is abruptly altered after sudden changes in environmental conditions. Their characterisation can provide information about the relationship between environmental factors and eco-physiological processes during tree growth. This paper reports about the variability of anatomical traits and stable carbon isotopic composition along tree rings as resulting from the application of two different methodological approaches: (a) the separation of each ring into different regions (earlywood, latewood and IADF) and the comparison of anatomical and isotopic parameters measured in those specific sectors and (b) the analysis of such features in continuum along ring width. Moreover, different parameters of vessels (i.e. ecd-equivalent circle diameter, elongation, sphericity and convexity of vessel lumen) were considered to identify those more appropriate for the representation of intra-annual anatomical variations. The analysis was conducted on Arbutus unedo L. growing on the Elba Island (Italy); tree rings of this species form IADFs with features clearly responsive to the environmental conditions experienced during plant growth. Results showed that the first approach, although more suitable to obtain data for subsequent statistical comparisons and for the calculation of correlations with environmental parameters, suffers from elements of subjectivity due to the size and position of the selected tree-ring regions. The in continuum method allows a clearer identification of the variation of tree-ring properties along ring width. Regarding anatomical parameters, shape indexes were not suitable indicators of intra-annual variability. The overall analysis suggested that using both methodologies in synergy helps to gain complete information and avoid misleading interpretations of IADFs in tree rings.

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“…Verificou-se empobrecimento em 13 C na lignina nas espécies que compõem o CLU de 3,57 ‰ e nas que colonizam a FES de 2,30 ‰ (Quadro 5), em relação ao conjunto do tecido vegetal, e esse foi acima do preconizado por Eglin et al (2008), que foi de 1-2 ‰ de δ 13 C, com relação ao conjunto tecido vegetal.…”

Section: Composição Isotópica Da Lignina E Da Celulose Da Vegetaçãounclassified

“…De maneira geral, a celulose é enriquecida em 1-2 ‰ de δ 13 C, em relação ao tecido vegetal (Leavitt & Long, 1986). Durante a lignificação, ocorre fracionamento isotópico por causa da deposição lenta da lignina em relação à produção de celulose, ocasionando nessa um enriquecimento em 13 C. A molécula de lignina possui aproximadamente 50 % a mais de C que a de celulose e a maior parte desse carbono é 12 C. O aumento de 10 % no teor de lignina na planta promove enriquecimento de 0,25 a 0,47 ‰ nos valores de δ 13 C da fração celulose (Eglin et al, 2008).…”

Section: Composição Isotópica Da Lignina E Da Celulose Da Vegetaçãounclassified

Composição lignocelulósica e isótopica da vegetação e da matéria orgânica do solo de uma turfeira tropical: I - composição florística, fitomassa e acúmulo de carbono

Silva¹,

Silva

Pereira

et al. 2013

Rev. Bras. Ciênc. Solo

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RESUMOA matéria orgânica do solo (MOS) é um dos grandes reservatórios de carbono (C) da Terra e constitui um dos principais componentes do ciclo do C. Turfeiras, ambientes acumuladores de MOS, são produto da decomposição de vegetais, que se desenvolvem e se acumulam em ambientes saturados com água, sendo o estádio inicial da sequência de carbonificação. A fitomassa participa de forma marcante no ciclo global do C, armazenando em torno de 85 % de todo o C terrestre acima do solo. O tecido vegetal é composto principalmente por lignina, celulose e hemicelulose, constituindo até 85 % da biomassa seca. As plantas discriminam C de forma diferenciada, em razão de seu ciclo fotossintético (C 3 , C 4 e CAM). As turfeiras da Serra do Espinhaço Meridional (SdEM-MG) são colonizadas por vegetação de Campo Limpo Úmido (CLU) e de Floresta Estacional Semidecidual (FES), onde ocorrem espécies dos ciclos fotossintéticos C 3 e C 4. Este trabalho objetivou avaliar a contribuição dessas duas fitofisionomias para o acúmulo de MOS, por meio da avaliação da fitomassa e da composição lignocelulósica e isotópica da vegetação e da MOS. A turfeira estudada localiza-se na SdEM e ocupa 81,75 ha.

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Biochemical composition is not the main factor influencing variability in carbon isotope composition of tree rings

Cited by 24 publications

References 43 publications

Identification of anatomically non-distinct annual rings in tropical trees using stable isotopes

Identification of anatomically non-distinct annual rings in tropical trees using stable isotopes

Discrete versus continuous analysis of anatomical and δ13C variability in tree rings with intra-annual density fluctuations

Composição lignocelulósica e isótopica da vegetação e da matéria orgânica do solo de uma turfeira tropical: I - composição florística, fitomassa e acúmulo de carbono

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