Carbon isotope ratios in tree rings respond differently to climatic variations than tree-ring width in a mesic temperate forest

ABSTRACTRelict tree species in the Andean mountains are important sources of information about climate variability and climate change. This study deals with dendroclimatology and growth patterns in Polylepis reticulata Hieron., growing at high elevation (mean of 4000 m a.s.l.) in three sites of the Ecuadorian Andes. The aims of the research were: (i) characterizing tree-ring boundaries; (ii) describing tree-ring patterns of the study sites; (iii) investigating the relationships between climate and radial tree growth; and (iv) determining the spatial correlation between seasonal climatic factors and tree-ring width of P. reticulata. Tree rings were characterized by semi-ring porosity and slight differences in fibre wall thickness between latewood and subsequent earlywood. In all sampling sites, tree rings in heartwood were more clearly visible than in sapwood. Tree-ring width was more related to temperature than to precipitation, with growth being also affected by site conditions and stand structure, as well as other local factors. No significant relationships were found between tree-ring chronologies of P. reticulata and El Niño-Southern Oscillation (ENSO) and Vapour Pressure Deficit indices. The study highlights that there is not a clear driving climate factor for radial growth of P. reticulata. Additional research is needed to study growth dynamics of this species and the impacts of local environmental variables.

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Effects of age and environment on stable carbon isotope ratios in tree rings of riparian Populus

Palaeogeography Palaeoclimatology Palaeoecology ◽

10.1016/j.palaeo.2019.03.022 ◽

2019 ◽

Vol 524 ◽

pp. 25-32 ◽

Cited By ~ 6

Author(s):

Jonathan M. Friedman ◽

Craig A. Stricker ◽

Adam Z. Csank ◽

Honghua Zhou

Keyword(s):

Carbon Isotope ◽

Tree Rings ◽

Stable Carbon Isotope ◽

Isotope Ratios ◽

Stable Carbon ◽

Stable Carbon Isotope Ratios ◽

Carbon Isotope Ratios

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Tree-ring carbon-isotope ratios re-examined

Nature ◽

10.1038/333712a0 ◽

1988 ◽

Vol 333 (6175) ◽

pp. 712-712 ◽

Cited By ~ 8

Author(s):

R. J. FRANCEY ◽

K. T. HUBICK

Keyword(s):

Carbon Isotope ◽

Tree Ring ◽

Isotope Ratios ◽

Carbon Isotope Ratios ◽

Ring Carbon

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Effects of extreme drought and wet events for tree mortality: Insights from tree‐ring width and carbon isotope ratio in a Siberian larch forest

Ecohydrology ◽

10.1002/eco.2143 ◽

2019 ◽

Vol 12 (8) ◽

Cited By ~ 4

Author(s):

Shunsuke Tei ◽

Atsuko Sugimoto ◽

Hitoshi Yonenobu ◽

Ayumi Kotani ◽

Trofim C. Maximov

Keyword(s):

Carbon Isotope ◽

Tree Ring ◽

Isotope Ratio ◽

Tree Mortality ◽

Ring Width ◽

Siberian Larch ◽

Carbon Isotope Ratio ◽

Larch Forest ◽

Extreme Drought ◽

Tree Ring Width

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Are there enormous age-trends in stable carbon isotope ratios of oak tree rings?

The Holocene ◽

10.1177/0959683620941073 ◽

2020 ◽

Vol 30 (11) ◽

pp. 1637-1642

Author(s):

Danny McCarroll ◽

Josie E Duffy ◽

Neil J Loader ◽

Giles HF Young ◽

Darren Davies ◽

...

Keyword(s):

Carbon Isotope ◽

Stable Carbon Isotope ◽

Ring Width ◽

Isotope Ratios ◽

Segment Length ◽

Stable Carbon ◽

Stable Carbon Isotope Ratios ◽

Carbon Isotope Ratios ◽

Age Trends ◽

The Mean

We test a recent prediction that stable carbon isotope ratios from UK oaks will display age-trends of more than 4‰ per century by measuring >5400 carbon isotope ratios from the late-wood alpha-cellulose of individual rings from 18 modern oak trees and 50 building timbers spanning the 9th–21st centuries. After a very short (c.5 years) juvenile phase with slightly elevated values, the number of series that show rising and falling trends is almost equal (33:35) and the average trend is almost zero. These results are based upon measuring and averaging the trends in individual time-series; the ‘mean of the slopes’ approach. We demonstrate that the more conventional ‘slope of the mean’ approach can produce strong but spurious ‘age-trends’ even when the constituent series are flat, with zero slope and zero variance. We conclude that it is safe to compile stable carbon isotope chronologies from UK oaks without de-trending. The isotope chronologies produced in this way are not subject to the ‘segment length curse’, which applies to growth measurements, such as ring width or density, and have the potential to retain very long-term climate signals.

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Tree-ring width wavelet and spectral analysis of solar variability and climatic effects on a Chilean cypress during the last two and a half millennia

Climate of the Past Discussions ◽

10.5194/cpd-1-121-2005 ◽

2005 ◽

Vol 1 (1) ◽

pp. 121-135 ◽

Cited By ~ 10

Author(s):

N. R. Rigozo ◽

D. J. R. Nordeman ◽

E. Echer ◽

L. E. A. Vieira ◽

M. P. S. Echer ◽

...

Keyword(s):

Spectral Analysis ◽

Wavelet Analysis ◽

Tree Ring ◽

Confidence Level ◽

Ring Width ◽

Solar Modulation ◽

Tree Ring Width ◽

Enso Events ◽

Climatic Variations ◽

Tree Ring Data

Abstract. Spectral and wavelet analysis were performed on a tree ring width time series obtained from a 2500 yr old cypress tree (Fitzroya cupressoides) from Costa del Osorno, Chile. The periods for analysis were selected at 95% confidence level. Both periodicities characteristic of solar activity and climatic variations were found in this tree ring width series. The 11 and 22 years solar cycle periods were present in tree ring data with a confidence level above 98%. This indicates the solar modulation of climatic variations is being recorded by the tree ring grown. However wavelet analysis shows that these are present only sparsely. Short-term variations, between 2-5 years, are also present in tree ring data, and are shown by wavelet maps to be a more permanent characteristic. This time scale is a signature of ENSO events. Long-term variations, above 200 years, are also present in tree ring data. The spectral analysis performed in this work shows that this species has the ability to record solar-ENSO variations that seems to be affecting the local environment of tree growth, and also that this region was influenced by ENSO events at least in the past 2500 yr interval covered by this study.

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