Hydro-climatic variability in southern Ecuador reflected by tree-ring oxygen isotopes

Volland, Franziska; Pucha, Darwin; Bräuning, Achim

doi:10.3112/erdkunde.2016.01.05

Cited by 25 publications

(23 citation statements)

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“…A long‐term increase of δ 18 O values has been encountered in several studies conducted on tropical tree species (Poussart & Schrag ; Xu, Sano & Nakatsuka ; Brienen et al . ; van der Sleen ; van der Sleen, Groenendijk & Zuidema ; Volland, Pucha & Bräuning ) Some of these trends could be caused by ontogenetic changes, when sampling design did not correct for this, but a consistent small trend over the past century was also found in studies that did correct for ontogenetic effects (Brienen et al . ; van der Sleen ; van der Sleen, Groenendijk & Zuidema ; Volland, Pucha & Bräuning ).…”

Section: Stable Isotopes Sequences In Tropical Treesmentioning

confidence: 98%

“…; van der Sleen ; van der Sleen, Groenendijk & Zuidema ; Volland, Pucha & Bräuning ) Some of these trends could be caused by ontogenetic changes, when sampling design did not correct for this, but a consistent small trend over the past century was also found in studies that did correct for ontogenetic effects (Brienen et al . ; van der Sleen ; van der Sleen, Groenendijk & Zuidema ; Volland, Pucha & Bräuning ). For the Amazon region, these results are consistent with similar increases of δ 18 O in Andean ice cores (Thompson et al .…”

Section: Stable Isotopes Sequences In Tropical Treesmentioning

confidence: 98%

“…; van der Sleen, Groenendijk & Zuidema ) sometimes over large spatial distances (Baker et al . ; Volland, Pucha & Bräuning ). Synchronous variability in δ 18 O can be higher than for ring‐width, thus providing an alternative tool for cross dating (Baker et al .…”

Section: Stable Isotopes Sequences In Tropical Treesmentioning

confidence: 99%

“…Synchronous variability in δ 18 O can be higher than for ring‐width, thus providing an alternative tool for cross dating (Baker et al . ; Volland, Pucha & Bräuning ) and identification of false and missing rings (Boysen, Evans & Baker ). However, δ 18 O synchronization between individuals may be low for certain species or sites (e.g.…”

Section: Stable Isotopes Sequences In Tropical Treesmentioning

confidence: 99%

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Stable isotopes in tropical tree rings: theory, methods and applications

2017

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Summary1. The notion that many tropical tree species form annual growth rings has triggered research on their growth and its environmental drivers over long periods of time. Even more recently, a large number of studies have also analysed the natural abundance of stable isotopes in tropical tree rings. The rapid developments in this young field call for a review. Here, we focus on stable isotopes of carbon ( 13 C

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Section: Stable Isotopes Sequences In Tropical Treesmentioning

confidence: 98%

Section: Stable Isotopes Sequences In Tropical Treesmentioning

confidence: 98%

Section: Stable Isotopes Sequences In Tropical Treesmentioning

confidence: 99%

Section: Stable Isotopes Sequences In Tropical Treesmentioning

confidence: 99%

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Stable isotopes in tropical tree rings: theory, methods and applications

2017

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“…Many other studies have validated these findings and have raised important implications for the future of management decisions involving tropical forests (e.g. worBes 1989;1995;2002;sTahle 1999;dünisch and monTóia 2003;FichTler and clark 2003;Brienen and Zuidema 2005;Brienen and Zuidema 2006;Therrell et al 2006;Baker and BunyaveJchewin 2006;BräuninG et al 2009;lewis et al 2009;roZendaal et al 2009;Brienen et al 2010;héraulT et al 2010;roZendaal et al 2010;TroueT et al 2010;roZendaal and Zuidema 2011;wils et al 2011;donG et al 2012;Zuidema et al 2012;locosselli et al 2013;alTman et al 2013;de ridder et al 2013;Zuidema et al 2013;GroenendiJk et al 2014;locosselli et al 2016;colomBaroli et al 2016;volland et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Towards establishing a new environmental archive – Annual growth periodicity, stable carbon isotope variability and reconstruction potential of 'Akoko (Euphorbia olowaluana), a native Hawaiian tree with C4 photosynthetic pathway

Ben¹,

Hart²,

Helle³

2017

Erdkunde

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Originally published as:Ben, T., Hart, P. J., Helle, G. (2017): Towards establishing a new environmental archive -Annual growth periodicity, stable carbon isotope variability and reconstruction potential of 'Akoko (Euphorbia olowaluana), a native Hawaiian tree with C4 photosynthetic pathway. Summary: Tree ring patterns provide one of the best records of pre-instrumental environmental and climate variability. To date, tree ring chronologies were explored from woody plant species with C 3 photosynthetic pathway, only. For the first time, we have studied wood growth periodicity and stable carbon isotope ratios of tree ring cellulose of a tree species with C 4 photosynthesis and compared these data to those of a C 3 tree species from the same habitat. The investigated species, Māmane (Sophora chrysophylla, C 3 ) and 'Akoko (Euphorbia olowaluana, C 4 ), are small endemic Hawaiian trees sampled from a rather dry, high elevation site on the ridge between Mauna Loa and Mauna Kea on the island of Hawai'i, USA. A relatively strong correlation in ring patterns was found within the 'Akoko and the Māmane individuals as well as with ring-width patterns from a nearby population of introduced Deodar cedar (Cedrus deodara) trees that serve as a reference. This correlation is evidence that the C 4 -plant 'Akoko may form annual growth rings. In addition to being the first demonstration of annual growth rings in a C 4 plant, our findings have important implications for future climate change research in Hawai'i. Unlike plants with a C 3 -photosynthetic pathway, C 4 plants do not show strong discrimination against 13 C during the photosynthetic fixation of CO 2 . Thus, 'Akoko may provide a record of past atmospheric CO 2 concentration (CO 2 atm) that can be compared with, and possibly supplement, the well-known Keeling curve produced by the nearby Mauna Loa Atmospheric Observatory. Regression analysis indicates a significant relationship between 'Akoko δ 13 C averages and atmospheric δ 13 C values. Furthermore, time series of tree ring data from both species provide long-term information on the response of C 3 and C 4 -plants to increasing atmospheric CO 2 concentrations and climate change. Trends in δ 13 C (intrinsic water-use efficiency, iWUE) of the two species show similar responses in that both demonstrate an increase in iWUE over time and with increased CO 2 atm. 'Akoko and Māmane iWUE curves are different however, in that the 'Akoko (C 4 ) curve is non-linear and a significant increase could only be observed post 1975, while the Māmane curve shows a distinct linearly increasing trend throughout the observation period.Zusammenfassung: Jahrringe von Bäumen werden seit Jahrzehnten als Klima-und Umweltarchiv genutzt, um natürliche und anthropogene Veränderungen der letzten 1000 Jahre oder mehr zu rekonstruieren. Bis heute wurden Jahrringchronologien ausschließlich von Holzpflanzen mit dem C 3 -Photosynthesemechanismus erstellt. In dieser dendrochronologischen Studie wurden zum ersten Mal Untersuchungen zur Periodizität des Holzzuw...

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What drives interannual variation in tree ring oxygen isotopes in the Amazon?

Baker

Gloor

Spracklen

et al. 2016

Geophysical Research Letters

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Oxygen isotope ratios in tree rings (δ18OTR) from northern Bolivia record local precipitation δ18O and correlate strongly with Amazon basin‐wide rainfall. While this is encouraging evidence that δ18OTR can be used for paleoclimate reconstructions, it remains unclear whether variation in δ18OTR is truly driven by within‐basin processes, thus recording Amazon climate directly, or if the isotope signal may already be imprinted on incoming vapor, perhaps reflecting a pan‐tropical climate signal. We use atmospheric back trajectories combined with satellite observations of precipitation, together with water vapor transport analysis to show that δ18OTR in Bolivia are indeed controlled by basin‐intrinsic processes, with rainout over the basin the most important factor. Furthermore, interannual variation in basin‐wide precipitation and atmospheric circulation are both shown to affect δ18OTR. These findings suggest δ18OTR can be reliably used to reconstruct Amazon precipitation and have implications for the interpretation of other paleoproxy records from the Amazon basin.

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Hydro-climatic variability in southern Ecuador reflected by tree-ring oxygen isotopes

Cited by 25 publications

References 0 publications

Stable isotopes in tropical tree rings: theory, methods and applications

Stable isotopes in tropical tree rings: theory, methods and applications

Towards establishing a new environmental archive – Annual growth periodicity, stable carbon isotope variability and reconstruction potential of 'Akoko (Euphorbia olowaluana), a native Hawaiian tree with C4 photosynthetic pathway

What drives interannual variation in tree ring oxygen isotopes in the Amazon?

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