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The unknown third – Hydrogen isotopes in tree-ring cellulose across Europe

V. Vitali, E. Martínez-Sancho, K. Treydte, L. Andreu-Hayles, I. Dorado-Liñán, E. Gutierrez, G. Helle, M. Leuenberger, Neil Loader Orcid Logo, K.T. Rinne-Garmston, G.H. Schleser, S. Allen, J.S. Waterhouse, M. Saurer, M.M. Lehmann

Science of The Total Environment, Volume: 813, Start page: 152281

Swansea University Author: Neil Loader Orcid Logo

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DOI (Published version): 10.1016/j.scitotenv.2021.152281

Abstract

This is the first Europe-wide comprehensive assessment of the climatological and physiological information recorded by hydrogen isotope ratios in tree-ring cellulose (δ2Hc) based on a unique collection of annually resolved 100-year tree-ring records of two genera (Pinus and Quercus) from 17 sites (3...

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Published in: Science of The Total Environment
ISSN: 0048-9697
Published: Elsevier BV 2022
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URI: https://cronfa.swan.ac.uk/Record/cronfa59055
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We observed that the high-frequency climate signals in the &#x3B4;2Hc chronologies were weaker than those recorded in carbon (&#x3B4;13Cc) and oxygen isotope signals (&#x3B4;18Oc) but similar to the tree-ring width ones (TRW). The &#x3B4;2Hc climate signal strength varied across the continent and was stronger and more consistent for Pinus than for Quercus. For both genera, years with extremely dry summer conditions caused a significant 2H-enrichment in tree-ring cellulose.The &#x3B4;2Hc inter-annual variability was strongly site-specific, as a result of the imprinting of climate and hydrology, but also physiological mechanisms and tree growth. To differentiate between environmental and physiological signals in &#x3B4;2Hc, we investigated its relationships with &#x3B4;18Oc and TRW. We found significant negative relationships between &#x3B4;2Hc and TRW (7 sites), and positive ones between &#x3B4;2Hc and &#x3B4;18Oc (10 sites). The strength of these relationships was nonlinearly related to temperature and precipitation. Mechanistic &#x3B4;2Hc models performed well for both genera at continental scale simulating average values, but they failed on capturing year-to-year &#x3B4;2Hc variations. Our results suggest that the information recorded by &#x3B4;2Hc is significantly different from that of &#x3B4;18Oc, and has a stronger physiological component independent from climate, possibly related to the use of carbohydrate reserves for growth. Advancements in the understanding of 2H-fractionations and their relationships with climate, physiology, and species-specific traits are needed to improve the modelling and interpretation accuracy of &#x3B4;2Hc. 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spelling 2022-01-07T12:53:50.5122572 v2 59055 2021-12-30 The unknown third – Hydrogen isotopes in tree-ring cellulose across Europe 8267a62100791965d08df6a7842676e6 0000-0002-6841-1813 Neil Loader Neil Loader true false 2021-12-30 SGE This is the first Europe-wide comprehensive assessment of the climatological and physiological information recorded by hydrogen isotope ratios in tree-ring cellulose (δ2Hc) based on a unique collection of annually resolved 100-year tree-ring records of two genera (Pinus and Quercus) from 17 sites (36°N to 68°N). We observed that the high-frequency climate signals in the δ2Hc chronologies were weaker than those recorded in carbon (δ13Cc) and oxygen isotope signals (δ18Oc) but similar to the tree-ring width ones (TRW). The δ2Hc climate signal strength varied across the continent and was stronger and more consistent for Pinus than for Quercus. For both genera, years with extremely dry summer conditions caused a significant 2H-enrichment in tree-ring cellulose.The δ2Hc inter-annual variability was strongly site-specific, as a result of the imprinting of climate and hydrology, but also physiological mechanisms and tree growth. To differentiate between environmental and physiological signals in δ2Hc, we investigated its relationships with δ18Oc and TRW. We found significant negative relationships between δ2Hc and TRW (7 sites), and positive ones between δ2Hc and δ18Oc (10 sites). The strength of these relationships was nonlinearly related to temperature and precipitation. Mechanistic δ2Hc models performed well for both genera at continental scale simulating average values, but they failed on capturing year-to-year δ2Hc variations. Our results suggest that the information recorded by δ2Hc is significantly different from that of δ18Oc, and has a stronger physiological component independent from climate, possibly related to the use of carbohydrate reserves for growth. Advancements in the understanding of 2H-fractionations and their relationships with climate, physiology, and species-specific traits are needed to improve the modelling and interpretation accuracy of δ2Hc. Such advancements could lead to new insights into trees' carbon allocation mechanisms, and responses to abiotic and biotic stress conditions. Journal Article Science of The Total Environment 813 152281 Elsevier BV 0048-9697 Climate change; Dendroecology; Deuterium; European forests; Isotope fractionation; Mechanistic modelling; Stable isotopes; Tree physiology 20 3 2022 2022-03-20 10.1016/j.scitotenv.2021.152281 COLLEGE NANME Geography COLLEGE CODE SGE Swansea University e ISONET EU-project (EVK-CT-2002-00147) 2022-01-07T12:53:50.5122572 2021-12-30T17:30:38.2405601 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Geography V. Vitali 1 E. Martínez-Sancho 2 K. Treydte 3 L. Andreu-Hayles 4 I. Dorado-Liñán 5 E. Gutierrez 6 G. Helle 7 M. Leuenberger 8 Neil Loader 0000-0002-6841-1813 9 K.T. Rinne-Garmston 10 G.H. Schleser 11 S. Allen 12 J.S. Waterhouse 13 M. Saurer 14 M.M. Lehmann 15 59055__22073__c293c2e70183486d9b4b75b2ffdf86f6.pdf 59055.pdf 2022-01-07T12:51:25.9087726 Output 4378116 application/pdf Version of Record true © 2021 The Authors. 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 The unknown third – Hydrogen isotopes in tree-ring cellulose across Europe
spellingShingle The unknown third – Hydrogen isotopes in tree-ring cellulose across Europe
Neil Loader
title_short The unknown third – Hydrogen isotopes in tree-ring cellulose across Europe
title_full The unknown third – Hydrogen isotopes in tree-ring cellulose across Europe
title_fullStr The unknown third – Hydrogen isotopes in tree-ring cellulose across Europe
title_full_unstemmed The unknown third – Hydrogen isotopes in tree-ring cellulose across Europe
title_sort The unknown third – Hydrogen isotopes in tree-ring cellulose across Europe
author_id_str_mv 8267a62100791965d08df6a7842676e6
author_id_fullname_str_mv 8267a62100791965d08df6a7842676e6_***_Neil Loader
author Neil Loader
author2 V. Vitali
E. Martínez-Sancho
K. Treydte
L. Andreu-Hayles
I. Dorado-Liñán
E. Gutierrez
G. Helle
M. Leuenberger
Neil Loader
K.T. Rinne-Garmston
G.H. Schleser
S. Allen
J.S. Waterhouse
M. Saurer
M.M. Lehmann
format Journal article
container_title Science of The Total Environment
container_volume 813
container_start_page 152281
publishDate 2022
institution Swansea University
issn 0048-9697
doi_str_mv 10.1016/j.scitotenv.2021.152281
publisher Elsevier BV
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Geography{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Geography
document_store_str 1
active_str 0
description This is the first Europe-wide comprehensive assessment of the climatological and physiological information recorded by hydrogen isotope ratios in tree-ring cellulose (δ2Hc) based on a unique collection of annually resolved 100-year tree-ring records of two genera (Pinus and Quercus) from 17 sites (36°N to 68°N). We observed that the high-frequency climate signals in the δ2Hc chronologies were weaker than those recorded in carbon (δ13Cc) and oxygen isotope signals (δ18Oc) but similar to the tree-ring width ones (TRW). The δ2Hc climate signal strength varied across the continent and was stronger and more consistent for Pinus than for Quercus. For both genera, years with extremely dry summer conditions caused a significant 2H-enrichment in tree-ring cellulose.The δ2Hc inter-annual variability was strongly site-specific, as a result of the imprinting of climate and hydrology, but also physiological mechanisms and tree growth. To differentiate between environmental and physiological signals in δ2Hc, we investigated its relationships with δ18Oc and TRW. We found significant negative relationships between δ2Hc and TRW (7 sites), and positive ones between δ2Hc and δ18Oc (10 sites). The strength of these relationships was nonlinearly related to temperature and precipitation. Mechanistic δ2Hc models performed well for both genera at continental scale simulating average values, but they failed on capturing year-to-year δ2Hc variations. Our results suggest that the information recorded by δ2Hc is significantly different from that of δ18Oc, and has a stronger physiological component independent from climate, possibly related to the use of carbohydrate reserves for growth. Advancements in the understanding of 2H-fractionations and their relationships with climate, physiology, and species-specific traits are needed to improve the modelling and interpretation accuracy of δ2Hc. Such advancements could lead to new insights into trees' carbon allocation mechanisms, and responses to abiotic and biotic stress conditions.
published_date 2022-03-20T04:16:03Z
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score 11.035634

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