RESEARCH PAPER
Inter- and intra-annual carbon isotope fluctuations in Pinus sylvestris L. tree rings whole wood and cellulose in north-eastern Lithuania
1
Laboratory of Nuclear Geophysics and Radioecology, Nature Research Centre, Lithuania
2
Laboratory of Geophysics and Radioecology, Nature Research Centre, Lithuania
3
Laboratory of Quaternary Research, Nature Research Centre, Lithuania
These authors had equal contribution to this work
Submission date: 2023-06-29
Acceptance date: 2024-08-30
Online publication date: 2024-10-11
Publication date: 2024-10-11
Corresponding author
Darius Valūnas
Laboratory of Nuclear Geophysics and Radioecology, Nature Research Centre, Akademijos 2, 08412, Vilnius, Lithuania
Laboratory of Nuclear Geophysics and Radioecology, Nature Research Centre, Akademijos 2, 08412, Vilnius, Lithuania
Geochronometria 2024;51(1)
KEYWORDS
TOPICS
DendrochronologyStable IsotopesFluvial EnvironmentsLacustrine EnvironmentsMarine EnvironmentsPeatbogsModern Period
ABSTRACT
In temperate regions trees typically exhibit growth sensitivity to climatic conditions during the growth season. Annual tree ring growth increments correlate with a variety of environmental factors. As an index of water use efficiency, δ13C is a preferred proxy to allow accurate interpretation of environmental factors critical for the tree growth, including changes in climate patterns, variation in the ambient temperature and precipitation.
We assumed that isotopic differences within individual tree rings are likely to produce seasonal isotope fluctuations in the chronology that might be interpreted as response to environmental impacts. To verify the assumption, we measured δ13C in annual tree rings of Pinus Sylvestris L. split into 13 intra-annual segments each and checked δ13C correlations with temperature, precipitation, the number of sunshine hours and relative air humidity. For the investigation, we chose a site in north-eastern Lithuania, Zarasai, located in boreal latitude and remote from industrial pollution sources. The methodology of the research was based on high coherence of δ13C chronologies measured in the whole wood and α-cellulose extracted by means of two different methods. The experiment produced strong δ13C correlations with hydrometeorological parameters, especially in the earlywood formed in June
ACKNOWLEDGEMENTS
We would like to express our deepest appreciation to Dr. Rūta Barisevičiūtė and Dr. Andrius Garbaras, researchers of Isotopic Research Laboratory at the Centre for Physi-cal Sciences and Technology, for their assistance in con-ducting isotopic measurements necessary for the present research.
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| eISSN: | 1897-1695 |
| ISSN: | 1733-8387 |
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