Oxygen isotopes in tree rings show good coherence between species and sites in Bolivia

Baker, Jessica C. A.; Hunt, Sarah F.P.; Clerici, Santiago; Newton, Robert J.; Bottrell, Simon H.; Leng, Melanie J.; Heaton, Timothy H.; Helle, Gerhard; Argollo, Jaime; Gloor, Manuel; Brienen, Roel J. W.

doi:10.1016/j.gloplacha.2015.09.008

Cited by 63 publications

(68 citation statements)

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“…This was because previous work has shown that trees from Bolivia show only a weak correspondence of ring-width patterns between trees (e.g. r mean = 0.17, EPS = 0.64; Baker et al 2015), even when rings showed very strong oxygen isotope (d 18 O) crossdating statistics (r mean = 0.71, EPS = 0.96; Baker et al 2015) and strong climate-d…”

Section: Methodsmentioning

confidence: 99%

“…This approach is a useful method for validating crossdated tree-ring samples (e.g. Andreu-Hayles et al 2015;Baker et al 2015;Bormann and Berlyn 1982;Pearson et al 2011;Santos et al 2015;Worbes and Junk 1989). All measurements were performed on a-cellulose or holocellulose extracts rather than whole wood, as these wood fractions are immobile and will thus produce more precise radiocarbon dates than if whole wood were used (Leavitt and Bannister 2009).…”

Section: Methodsmentioning

confidence: 99%

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Does Cedrela always form annual rings? Testing ring periodicity across South America using radiocarbon dating

Baker

Santos

Gloor

et al. 2017

Trees

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Key Message Radiocarbon dating shows that Cedrela trees from Bolivia, Ecuador and Venezuela form one ring per year but Cedrela trees from Suriname form two rings per year. Abstract Tropical tree rings have the potential to yield valuable ecological and climate information, on the condition that rings are annual and accurately dated. It is important to understand the factors controlling ring formation, since regional variation in these factors could cause trees in different regions to form tree rings at different times. Here, we use 'bomb-peak' radiocarbon ( 14 C) dating to test the periodicity of ring formation in Cedrela trees from four sites across tropical South America. We show that trees from Bolivia, Ecuador and Venezuela have reliably annual tree rings, while trees from Suriname regularly form two rings per year. This proves that while tree rings of a particular species may be demonstrably annual at one site, this does not imply that rings are formed annually in other locations. We explore possible drivers of variation in ring periodicity and find that Cedrela growth rhythms are most likely caused by precipitation seasonality, with a possible degree of genetic control. Therefore, tree-ring studies undertaken at new locations in the tropics require independent validation of the annual nature of tree rings, irrespective of how the studied species behaves in other locations.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Does Cedrela always form annual rings? Testing ring periodicity across South America using radiocarbon dating

Baker

Santos

Gloor

et al. 2017

Trees

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“…Several studies confirmed that tree ring δ 18 O shows large‐scale coherence between species [ Baker et al , ; Liu et al , ], and the authors proposed that this coherence was probably caused by a strong spatial coherence in precipitation δ 18 O due to the large‐scale controls on this property. Based on the precipitation δ 18 O data from Global Network of Isotopes in Precipitation stations and IAEA, spatial variation of precipitation δ 18 O over China has been estimated [ Liu et al , ].…”

Section: Discussionmentioning

confidence: 99%

“…The present larch and pine δ 18 O chronologies also showed strong coherence since 1800 (Figure a), suggesting the existence of at least two common drivers for tree ring δ 18 O of the two species. We hypothesize that the first likely arises from a dominant imprint of interannual variation in precipitation δ 18 O on tree ring δ 18 O via a strong influence of the water source δ 18 O [ Baker et al , ; Liu et al , ]. The second is leaf water enrichment, which may dampen the effect of variations in water source δ 18 O [ Ferrio and Voltas , ; Kahmen et al , ; Treydte et al , ].…”

Section: Discussionmentioning

confidence: 99%

Tree ring δ¹⁸O reveals no long‐term change of atmospheric water demand since 1800 in the northern Great Hinggan Mountains, China

et al. 2017

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Global warming will significantly increase transpirational water demand, which could dramatically affect plant physiology and carbon and water budgets. Tree ring δ18O is a potential index of the leaf‐to‐air vapor‐pressure deficit (VPD) and therefore has great potential for long‐term climatic reconstruction. Here we developed δ18O chronologies of two dominant native trees, Dahurian larch (Larix gmelinii Rupr.) and Mongolian pine (Pinus sylvestris var. mongolica), from a permafrost region in the Great Hinggan Mountains of northeastern China. We found that the July–August VPD and relative humidity were the dominant factors that controlled tree ring δ18O in the study region, indicating strong regulation of stomatal conductance. Based on the larch and pine tree ring δ18O chronologies, we developed a reliable summer (July–August) VPD reconstruction since 1800. Warming growing season temperatures increase transpiration and enrich cellulose 18O, but precipitation seemed to be the most important influence on VPD changes in this cold region. Periods with stronger transpirational demand occurred around the 1850s, from 1914 to 1925, and from 2005 to 2010. However, we found no overall long‐term increasing or decreasing trends for VPD since 1800, suggesting that despite the increasing temperatures and thawing permafrost throughout the region, forest transpirational demand has not increased significantly during the past two centuries. Under current climatic conditions, VPD did not limit growth of larch and pine, even during extremely drought years. Our findings will support more realistic evaluations and reliable predictions of the potential influences of ongoing climatic change on carbon and water cycles and on forest dynamics in permafrost regions.

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“…It has long been recognized that the stable (carbon, oxygen and hydrogen) isotope ratios of tree rings generally exhibit much stronger correlations between trees than is the case with ring widths (e.g. Robertson et al ., ; McCarroll and Pawellek, ; Treydte et al ., ; Saurer et al ., ; Baker et al ., ) and it has been noted several times that this might allow stable isotopes to be used for cross‐dating, in a similar manner to ring‐width‐based dendrochronology (Leavitt et al . ).…”

Section: Introductionmentioning

confidence: 99%

Tree ring dating using oxygen isotopes: a master chronology for central England

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McCarroll

Miles

et al. 2019

J Quaternary Science

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Ring‐width dendrochronology, based on matching patterns of ring width variability, works best when trees are growing under significant environmental (climatic) stress. In the UK, and elsewhere in the temperate mid‐latitudes, trees generally experience low stress, so dating is more difficult and often fails. Oxygen isotopes in tree rings passively record changes in the isotopic ratios of summer precipitation, so they carry a strong common signal, which offers potential for cross‐dating. A master chronology covering the period 1200–2000 ce was constructed using the oxygen isotope ratios of the latewood cellulose of oak samples from central England. Two independent chronologies, developed to verify the isotopic signal, were combined (n = 10 trees) and the method was evaluated by dating timbers of known age and historical timbers that could not be dated by ring‐width dendrochronology, from both within and beyond the central England region. The agreement between samples and the master chronology is exceptionally strong, allowing the dating of timbers with far fewer rings than is normally the case for ring‐width dendrochronology. Tree‐ring oxygen isotope values are more suited to correlation analysis than tree‐ring widths, so it is possible to provide t‐values that conform to Student's t‐distribution and can be converted into probabilities of error. A protocol for assigning dates using ‘stable‐isotope dendrochronology’ is proposed, which has the potential to revolutionize the dating of wooden structures and artefacts, allowing the dating of short and invariant ring sequences from young, fast‐grown trees. Such samples are commonplace throughout the historical building and archaeological records and were, until now, considered impossible to date. © 2019 The Authors. Journal of Quaternary Science Published by John Wiley & Sons Ltd

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Oxygen isotopes in tree rings show good coherence between species and sites in Bolivia

Cited by 63 publications

References 68 publications

Does Cedrela always form annual rings? Testing ring periodicity across South America using radiocarbon dating

Does Cedrela always form annual rings? Testing ring periodicity across South America using radiocarbon dating

Tree ring δ¹⁸O reveals no long‐term change of atmospheric water demand since 1800 in the northern Great Hinggan Mountains, China

Tree ring dating using oxygen isotopes: a master chronology for central England

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Oxygen isotopes in tree rings show good coherence between species and sites in Bolivia

Cited by 63 publications

References 68 publications

Does Cedrela always form annual rings? Testing ring periodicity across South America using radiocarbon dating

Does Cedrela always form annual rings? Testing ring periodicity across South America using radiocarbon dating

Tree ring δ18O reveals no long‐term change of atmospheric water demand since 1800 in the northern Great Hinggan Mountains, China

Tree ring dating using oxygen isotopes: a master chronology for central England

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Tree ring δ¹⁸O reveals no long‐term change of atmospheric water demand since 1800 in the northern Great Hinggan Mountains, China