Evaluation of the non-climatic (age-related) trends of stable oxygen and carbon isotopes in Swiss stone pine (Pinus cembra L.) tree rings from the Eastern Carpathians, Romania

Kern, Zoltan; Nagavciuc, Viorica; Hatvani, István Gábor; Hegyi, István Norbert; Loader, Neil; Popa, Ionel

doi:10.1016/j.dendro.2023.126061

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Evaluation of the non-climatic (age-related) trends of stable oxygen and carbon isotopes in Swiss stone pine (Pinus cembra L.) tree rings from the Eastern Carpathians, Romania

Zoltan Kern

, Viorica Nagavciuc, István Gábor Hatvani, István Norbert Hegyi, Neil Loader

, Ionel Popa

Dendrochronologia, Volume: 78, Start page: 126061

Swansea University Author: Neil Loader

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DOI (Published version): 10.1016/j.dendro.2023.126061

Abstract

The presence, magnitude, and duration of age and/or size-related trends in the stable isotopes in tree-ring cellulose time series has been a subject of scientific debate. Where present, their evaluation and removal are key to the development of robust climate calibrations and reconstructions, especi...

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Published in:	Dendrochronologia
ISSN:	1125-7865
Published:	Elsevier BV 2023
Online Access:	Check full text
URI:	https://cronfa.swan.ac.uk/Record/cronfa62453
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Where present, their evaluation and removal are key to the development of robust climate calibrations and reconstructions, especially in the low-frequency domain and where sample replication levels are low. Where reported, results suggest that the age/size/height-related trend of stable oxygen (δ18O) and carbon (δ13C) isotope compositions in tree-ring cellulose may vary according to the tree species and the individual tree location. For this reason, it is important when developing long palaeoclimate reconstructions for a new species, geographical region or ecological setting to perform studies to investigate non-climatic (age-related) trends. This study evaluates the ontogenetic pattern in the δ18O and δ13C data in Swiss stone pine trees from the Eastern Carpathians, Romania. For this, we used a new multi-centennial dataset consisting of 5 living and 10 relict Swiss stone pine samples collected from the Eastern Carpathians, which were annually resolved for δ18O and δ13C composition. Age-related trends were evaluated using the conventional “slope of the mean” approach as well as the “mean of the slope” method. The results suggest that neither the traditional “slope-of-the mean” nor the “mean-of-the-slope” approach indicates a persistent linear trend in the Swiss stone pine δ18O data, while for the δ13C data a systematic enrichment in 13C was observed over a < 40 year-long period after germination. Despite the limited sample size of this developing dataset these findings help to inform more detailed analyses and future sampling strategies in the Eastern Carpathian Swiss stone pine stands.</abstract><type>Journal Article</type><journal>Dendrochronologia</journal><volume>78</volume><journalNumber/><paginationStart>126061</paginationStart><paginationEnd/><publisher>Elsevier BV</publisher><placeOfPublication/><isbnPrint/><isbnElectronic/><issnPrint>1125-7865</issnPrint><issnElectronic/><keywords>Age trend; Tree ring; δ13C; δ18O; Arolla pine; Timberline forest</keywords><publishedDay>1</publishedDay><publishedMonth>4</publishedMonth><publishedYear>2023</publishedYear><publishedDate>2023-04-01</publishedDate><doi>10.1016/j.dendro.2023.126061</doi><url/><notes/><college>COLLEGE NANME</college><department>Geography</department><CollegeCode>COLLEGE CODE</CollegeCode><DepartmentCode>SGE</DepartmentCode><institution>Swansea University</institution><apcterm/><funders>Thanks for support from “Lendület” program of the Hungarian Academy of Sciences (LP2012-27/2012). 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spelling	2023-02-10T14:43:32.2059799 v2 62453 2023-01-26 Evaluation of the non-climatic (age-related) trends of stable oxygen and carbon isotopes in Swiss stone pine (Pinus cembra L.) tree rings from the Eastern Carpathians, Romania 8267a62100791965d08df6a7842676e6 0000-0002-6841-1813 Neil Loader Neil Loader true false 2023-01-26 SGE The presence, magnitude, and duration of age and/or size-related trends in the stable isotopes in tree-ring cellulose time series has been a subject of scientific debate. Where present, their evaluation and removal are key to the development of robust climate calibrations and reconstructions, especially in the low-frequency domain and where sample replication levels are low. Where reported, results suggest that the age/size/height-related trend of stable oxygen (δ18O) and carbon (δ13C) isotope compositions in tree-ring cellulose may vary according to the tree species and the individual tree location. For this reason, it is important when developing long palaeoclimate reconstructions for a new species, geographical region or ecological setting to perform studies to investigate non-climatic (age-related) trends. This study evaluates the ontogenetic pattern in the δ18O and δ13C data in Swiss stone pine trees from the Eastern Carpathians, Romania. For this, we used a new multi-centennial dataset consisting of 5 living and 10 relict Swiss stone pine samples collected from the Eastern Carpathians, which were annually resolved for δ18O and δ13C composition. Age-related trends were evaluated using the conventional “slope of the mean” approach as well as the “mean of the slope” method. The results suggest that neither the traditional “slope-of-the mean” nor the “mean-of-the-slope” approach indicates a persistent linear trend in the Swiss stone pine δ18O data, while for the δ13C data a systematic enrichment in 13C was observed over a < 40 year-long period after germination. Despite the limited sample size of this developing dataset these findings help to inform more detailed analyses and future sampling strategies in the Eastern Carpathian Swiss stone pine stands. Journal Article Dendrochronologia 78 126061 Elsevier BV 1125-7865 Age trend; Tree ring; δ13C; δ18O; Arolla pine; Timberline forest 1 4 2023 2023-04-01 10.1016/j.dendro.2023.126061 COLLEGE NANME Geography COLLEGE CODE SGE Swansea University Thanks for support from “Lendület” program of the Hungarian Academy of Sciences (LP2012-27/2012). Viorica Nagavciuc was supported by a grant of the Ministry of Research, Innovation and Digitization, CNCS/CCCDI – UEFISCDI, project number PN-III-P1-1.1-PD-2019-0469, within PNCDI III. Ionel Popa was supported by a grant of the Ministry of Research, Innovation and Digitization, CNCS/CCCDI – UEFISCDI, project number PN-III-P4-PCE-2021-1002, within PNCDI III. 2023-02-10T14:43:32.2059799 2023-01-26T13:36:40.0235463 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Geography Zoltan Kern 0000-0003-4900-2587 1 Viorica Nagavciuc 2 István Gábor Hatvani 3 István Norbert Hegyi 4 Neil Loader 0000-0002-6841-1813 5 Ionel Popa 6 62453__26523__ce031df6b19a403580126d51f73d2b75.pdf 62453_VoR.pdf 2023-02-10T14:42:06.3004508 Output 5983006 application/pdf Version of Record true © 2023 The Author(s). This is an open access article under the CC BY-NC-ND license true eng http://creativecommons.org/licenses/by-nc-nd/4.0/
title	Evaluation of the non-climatic (age-related) trends of stable oxygen and carbon isotopes in Swiss stone pine (Pinus cembra L.) tree rings from the Eastern Carpathians, Romania
spellingShingle	Evaluation of the non-climatic (age-related) trends of stable oxygen and carbon isotopes in Swiss stone pine (Pinus cembra L.) tree rings from the Eastern Carpathians, Romania Neil Loader
title_short	Evaluation of the non-climatic (age-related) trends of stable oxygen and carbon isotopes in Swiss stone pine (Pinus cembra L.) tree rings from the Eastern Carpathians, Romania
title_full	Evaluation of the non-climatic (age-related) trends of stable oxygen and carbon isotopes in Swiss stone pine (Pinus cembra L.) tree rings from the Eastern Carpathians, Romania
title_fullStr	Evaluation of the non-climatic (age-related) trends of stable oxygen and carbon isotopes in Swiss stone pine (Pinus cembra L.) tree rings from the Eastern Carpathians, Romania
title_full_unstemmed	Evaluation of the non-climatic (age-related) trends of stable oxygen and carbon isotopes in Swiss stone pine (Pinus cembra L.) tree rings from the Eastern Carpathians, Romania
title_sort	Evaluation of the non-climatic (age-related) trends of stable oxygen and carbon isotopes in Swiss stone pine (Pinus cembra L.) tree rings from the Eastern Carpathians, Romania
author_id_str_mv	8267a62100791965d08df6a7842676e6
author_id_fullname_str_mv	8267a62100791965d08df6a7842676e6_***_Neil Loader
author	Neil Loader
author2	Zoltan Kern Viorica Nagavciuc István Gábor Hatvani István Norbert Hegyi Neil Loader Ionel Popa
format	Journal article
container_title	Dendrochronologia
container_volume	78
container_start_page	126061
publishDate	2023
institution	Swansea University
issn	1125-7865
doi_str_mv	10.1016/j.dendro.2023.126061
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department_str	School of Biosciences, Geography and Physics - Geography{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Geography
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description	The presence, magnitude, and duration of age and/or size-related trends in the stable isotopes in tree-ring cellulose time series has been a subject of scientific debate. Where present, their evaluation and removal are key to the development of robust climate calibrations and reconstructions, especially in the low-frequency domain and where sample replication levels are low. Where reported, results suggest that the age/size/height-related trend of stable oxygen (δ18O) and carbon (δ13C) isotope compositions in tree-ring cellulose may vary according to the tree species and the individual tree location. For this reason, it is important when developing long palaeoclimate reconstructions for a new species, geographical region or ecological setting to perform studies to investigate non-climatic (age-related) trends. This study evaluates the ontogenetic pattern in the δ18O and δ13C data in Swiss stone pine trees from the Eastern Carpathians, Romania. For this, we used a new multi-centennial dataset consisting of 5 living and 10 relict Swiss stone pine samples collected from the Eastern Carpathians, which were annually resolved for δ18O and δ13C composition. Age-related trends were evaluated using the conventional “slope of the mean” approach as well as the “mean of the slope” method. The results suggest that neither the traditional “slope-of-the mean” nor the “mean-of-the-slope” approach indicates a persistent linear trend in the Swiss stone pine δ18O data, while for the δ13C data a systematic enrichment in 13C was observed over a < 40 year-long period after germination. Despite the limited sample size of this developing dataset these findings help to inform more detailed analyses and future sampling strategies in the Eastern Carpathian Swiss stone pine stands.
published_date	2023-04-01T04:22:05Z
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Evaluation of the non-climatic (age-related) trends of stable oxygen and carbon isotopes in Swiss stone pine (Pinus cembra L.) tree rings from the Eastern Carpathians, Romania

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