Soil and stem xylem water isotope data from two pan-European sampling campaigns

Marco M  Lehmann; Josie Geris; Ilja van Meerveld; Daniele Penna; Youri Rothfuss; Matteo Verdone; Pertti Ala-aho; Matyas Arvai; Alise Babre; Philippe Balandier; Fabian Bernhard; Lukrecija Butorac; Simon Damien Carrière; Natalie C.  Ceperley; Zuosinan Chen; Alicia Correa; Haoyu Diao; David Dubbert; Maren Dubbert; Fabio Ercoli; Marius G. Floriancic; Teresa E. Gimeno; Damien Gounelle; Frank Hagedorn; Christophe Hissler; Frédéric Huneau; Alberto Iraheta; Tamara Jakovljević; Nerantzis Kazakis; Zoltan Kern; Karl Knaebel; Johannes Kobler; Jiří Kocum; Charlotte Koeber; Gerbrand Koren; Angelika Kübert; Dawid Kupka; Samuel Le Gall; Aleksi  Lehtonen; Thomas Leydier; Philippe Malagoli; Francesca Sofia Manca di Villahermosa; Chiara  Mancino; Núria Martínez-Carreras; Nicolas Martin-StPaul; Hannu Marttila; Aline Meyer Oliveira; Gaël Monvoisin; Natalie Orlowski; Kadi Palmik-Das; Aurel Persoiu; Andrei Popa; Egor Prikaziuk; Cécile Quantin; Katja T Rinne-Garmston; Clara Rohde; Martin Sanda; Matthias Saurer; Daniel Schulz; Michael Paul Stockinger; Christine Stumpp; Jean-Stéphane Venisse; Lukas Vlcek; Stylianos Voudouris; Björn Weeser; Mark E.  Wilkinson; Giulia Zuecco; Katrin Meusburger

doi:10.5194/essd-2024-409

Soil and stem xylem water isotope data from two pan-European sampling campaigns

Marco M Lehmann^* (Corresponding Author)
, Josie Geris
, Ilja van Meerveld
, Daniele Penna
, Youri Rothfuss
, Matteo Verdone
, Pertti Ala-aho
, Matyas Arvai
, Alise Babre
, Philippe Balandier
, Fabian Bernhard
, Lukrecija Butorac
, Simon Damien Carrière
, Natalie C. Ceperley
, Zuosinan Chen
, Alicia Correa
, Haoyu Diao
, David Dubbert
, Maren Dubbert
, Fabio Ercoli

Marius G. Floriancic, Teresa E. Gimeno, Damien Gounelle, Frank Hagedorn, Christophe Hissler, Frédéric Huneau, Alberto Iraheta, Tamara Jakovljević, Nerantzis Kazakis, Zoltan Kern, Karl Knaebel, Johannes Kobler, Jiří Kocum, Charlotte Koeber, Gerbrand Koren , Angelika Kübert, Dawid Kupka, Samuel Le Gall, Aleksi Lehtonen, Thomas Leydier, Philippe Malagoli, Francesca Sofia Manca di Villahermosa, Chiara Mancino, Núria Martínez-Carreras, Nicolas Martin-StPaul, Hannu Marttila, Aline Meyer Oliveira, Gaël Monvoisin, Natalie Orlowski, Kadi Palmik-Das, Aurel Persoiu, Andrei Popa, Egor Prikaziuk, Cécile Quantin, Katja T Rinne-Garmston, Clara Rohde, Martin Sanda, Matthias Saurer, Daniel Schulz, Michael Paul Stockinger, Christine Stumpp, Jean-Stéphane Venisse, Lukas Vlcek, Stylianos Voudouris, Björn Weeser, Mark E. Wilkinson, Giulia Zuecco, Katrin Meusburger

^*Corresponding author for this work

Geography & Environment

Research output: Working paper › Preprint

Abstract

Stable isotope ratios of hydrogen (δ2H) and oxygen (δ18O) are crucial for studying ecohydrological dynamics in forests. However, most studies are confined to single sites, resulting in a lack of large-scale isotope data for understanding tree water uptake. Here, we provide a first systematic isotope dataset of soil and stem xylem water collected during two pan-European sampling campaigns at 40 beech (Fagus sylvatica), spruce (Picea abies), or mixed beech-spruce forest sites in spring and summer 2023 (Lehmann et al., 2024). The dataset is complemented by additional site-, soil-, and tree-specific metadata. The samples and metadata were collected by different researchers across Europe following a standardized protocol. Soil samples were taken at up to 5 depths (ranging from 0 to 90 cm) and stem xylem samples from three beech and/or spruce trees per site. All samples were sent to a single laboratory, where all analytical work was conducted. Water was extracted using cryogenic vacuum distillation and analyzed with an isotope laser spectrometer. Additionally, a subset of the samples was analyzed with an isotope ratio mass spectrometer. Data quality checks revealed a high mean total extraction efficiency, mean absolute water amount (> 1 mL), as well as high analytical accuracy and precision. The water isotopic signature of soil and stem xylem water varied as a function of the geographic origin and changed from spring to summer across all sites. While δ2H and δ18O values were strongly correlated, the soil water data plotted closer to the Global Meteoric Water Line (GMWL) than the stem xylem water. Specifically, the δ2H values of the stem xylem were more enriched than those of the soil water, leading to a systematic deviation from the GMWL. Isotopic enrichment of the stem xylem water was larger for spruce than for beech trees at mixed forest sites. This dataset is particularly useful for large-scale studies on plant water use, ecohydrological model testing, and isotope mapping across Europe.

Original language	English
Publisher	Copernicus Publications
Number of pages	27
DOIs	https://doi.org/10.5194/essd-2024-409
Publication status	Published - 17 Oct 2024

Bibliographical note

Data availability
All data is freely available under the agreement “Creative Commons Zero - No Rights Reserved (CC0 1.0)” in the data repository EnviDat: Lehmann, M. M., Geris, J., van Meerveld, I., Penna, D., Rothfuss, Y., Verdone, M., Ala455 Aho, P., Arvai, M., Babre, A., Balandier, P., Bernhard, F., Butorac, L., Carrière, S. D., Ceperley, N. C., Chen, Z., Correa, A., Diao, H., Dubbert, D., Dubbert, M., Ercoli, F., Floriancic, M. G., Gimeno, T. E., Gounelle, D., Hagedorn, F., Hissler, C., Huneau, F., Alberto, I., Jakovljević, T., Kazakis, N., Kern, Z., Knaebel, K., Kobler, J., Kocum, J., Koeber, C., Koren, G., Kübert, A., Kupka, D., le Gall, S., Lehtonen, A., Leydier, T., Malagoli, P., Manca di Villahermosa, F. S., Marchina, C., Martínez-Carreras, N., Martin-StPaul, N., Marttila, H., Meyer Oliveira, A., Monvoisin, G., Orlowski, N., Palmik-Das, K., Persoiu, A., Popa, A., Prikaziuk, E., Quantin, C., Rinne-Garmston, K. T., Rohde, C., Sanda, M., Saurer, M., Schulz, D., Stockinger, M. P., Stumpp, C., Vénisse, J.-S., Vlcek, L., Voudouris, S., Weeser, B., Wilkinson, M., Zuecco, G., and Meusburger, K.: Soil and stem xylem water isotope data from two pan-European sampling campaigns [dataset], https://www.doi.org/10.16904/envidat.542, 2024.

Funding

This study was financially supported by the COST Action: “Water isotopes in the critical zone: from groundwater recharge to plant transpiration - WATSON” CA19120 (www.cost.eu). The extraction of the water and isotope analyses were financially supported by the Swiss National Science Foundation (“TreeWater”, No. 205492; “InsightForest”, No. 213367) and by WSL (“Innovative project Oxygen17”). Alicia Correa was supported by the German Academic Exchange Service (DAAD) from funds of Federal Ministry for Economic Cooperation (BMZ), SDGnexus Network (No. 57526248). Aurel Persoiu and Andrei Popa were supported by UEFISCDI Romania (No. PN-III-P2-2.1-PED-2019-4102 & No. PN-III-P4-ID-PCE-2020-2723). Maren Dubbert acknowledges the funding by the Deutsche Forschungsgemeinschaft (No. 501530203) and by the Leibniz collaborative excellent grant (No. K444/2022), supporting Alberto Iraheta, Charlotte Koeber, and Clara Rohde. Katja Rinne was funded by the Academy of Finland (No. 343059). Research part at University of Oulu was supported by Research Council of Finland (No. 347348 and No. 356043), and Marie Skłodowska-Curie Postdoctoral Fellowship (No. 101111527)

Funders	Funder number
European Cooperation in Science and Technology	CA19120
Swiss National Science Foundation	205492, 213367
German Academic Exchange Service	57526248
UEFISCDI Romania	PN-III-P2-2.1-PED-2019-4102 , PN-III-P4-ID-PCE-2020-2723
Deutsche Forschungsgemeinschaft	501530203
Leibniz Collaborative Excellent Grant	K444/2022
Academy of Finland	343059
Research Council of Finland	347348, 356043
Marie Skłodowska-Curie Actions	101111527

Keywords

critical zone science
Europe
forest
hydrology
hydrogen isotopes
oxygen isotopes
root water uptake
soil water recharge
water stable isotopes
water sources

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10.5194/essd-2024-409Licence: CC BY

Soil and stem xylem water isotope data from two pan-European sampling campaigns
Lehmann, M. (Creator), Geris, J. (Creator), van Meerveld, I. (Creator), Penna, D. (Creator), Rothfuss, Y. (Creator), Verdone, M. (Creator), Ala-aho, P. (Creator), Arvai, M. (Creator), Babre, A. (Creator), Balandier, P. (Creator), Bernhard, F. (Creator), Butorac, L. (Creator), Carriere, S. D. (Creator), Ceperley, N. C. (Creator), Chen, Z. (Creator), Correa, A. (Creator), Diao, H. (Creator), Dubbert, D. (Creator), Dubbert, M. (Creator), Ercoli, F. (Creator), Floriancic, M. G. (Creator), Gimeno, T. E. (Creator), Gounelle, D. (Creator), Hagedorn, F. (Creator), Hissler, C. (Creator), Huneau, F. (Creator), Iraheta, A. (Creator), Jakovljevic, T. (Creator), Kazakis, N. (Creator), Kern, Z. (Creator), Knaebel, K. (Creator), Kobler, J. (Creator), Kocum, J. (Creator), Koeber, C. (Creator), Koren , G. (Creator), Kubert, A. (Creator), Kupka, D. (Creator), le Gall, S. (Creator), Lehtonen, A. (Creator), Leydier, T. (Creator), Malagoli, P. (Creator), Manca di Villahermosa, F. S. (Creator), Marchina, C. (Creator), Martinez-Carreras, N. (Creator), Martin-StPaul, N. (Creator), Marttila, H. (Creator), Meyer Oliveira, A. (Creator), Monvoisin, G. (Creator), Orlowski, N. (Creator), Palmik-Das, K. (Creator), Persoiu, A. (Creator), Popa, A. (Creator), Prikaziuk, E. (Creator), Quantin, C. (Creator), Rinne-Garmston, K. T. (Creator), Rohde, C. (Creator), Sanda, M. (Creator), Sauer, M. (Creator), Schulz, D. (Creator), Stockinger, M. P. (Creator), Stumpp, C. (Creator), Venisse, J.-S. (Creator), Vlcek, L. (Creator), Voudouris, S. (Creator), Weeser, B. (Creator), Wilkinson, M. (Creator), Zuecco, G. (Creator) & Meusburger, K. (Creator), EnviDat, 27 Aug 2024
DOI: 10.16904/envidat.542
Dataset

Cite this

Lehmann, M. M., Geris, J., van Meerveld, I., Penna, D., Rothfuss, Y., Verdone, M., Ala-aho, P., Arvai, M., Babre, A., Balandier, P., Bernhard, F., Butorac, L., Carrière, S. D., Ceperley, N. C., Chen, Z., Correa, A., Diao, H., Dubbert, D., Dubbert, M., ... Meusburger, K. (2024). Soil and stem xylem water isotope data from two pan-European sampling campaigns. Copernicus Publications. https://doi.org/10.5194/essd-2024-409

Lehmann, MM, Geris, J, van Meerveld, I, Penna, D, Rothfuss, Y, Verdone, M, Ala-aho, P, Arvai, M, Babre, A, Balandier, P, Bernhard, F, Butorac, L, Carrière, SD, Ceperley, NC, Chen, Z, Correa, A, Diao, H, Dubbert, D, Dubbert, M, Ercoli, F, Floriancic, MG, Gimeno, TE, Gounelle, D, Hagedorn, F, Hissler, C, Huneau, F, Iraheta, A, Jakovljević, T, Kazakis, N, Kern, Z, Knaebel, K, Kobler, J, Kocum, J, Koeber, C, Koren , G, Kübert, A, Kupka, D, Le Gall, S, Lehtonen, A, Leydier, T, Malagoli, P, Manca di Villahermosa, FS, Mancino, C, Martínez-Carreras, N, Martin-StPaul, N, Marttila, H, Meyer Oliveira, A, Monvoisin, G, Orlowski, N, Palmik-Das, K, Persoiu, A, Popa, A, Prikaziuk, E, Quantin, C, Rinne-Garmston, KT, Rohde, C, Sanda, M, Saurer, M, Schulz, D, Stockinger, MP, Stumpp, C, Venisse, J-S, Vlcek, L, Voudouris, S, Weeser, B, Wilkinson, ME, Zuecco, G & Meusburger, K 2024 'Soil and stem xylem water isotope data from two pan-European sampling campaigns' Copernicus Publications. https://doi.org/10.5194/essd-2024-409

@techreport{df45661002ff479896c1289bd0a8c0e9,

title = "Soil and stem xylem water isotope data from two pan-European sampling campaigns",

abstract = "Stable isotope ratios of hydrogen (δ2H) and oxygen (δ18O) are crucial for studying ecohydrological dynamics in forests. However, most studies are confined to single sites, resulting in a lack of large-scale isotope data for understanding tree water uptake. Here, we provide a first systematic isotope dataset of soil and stem xylem water collected during two pan-European sampling campaigns at 40 beech (Fagus sylvatica), spruce (Picea abies), or mixed beech-spruce forest sites in spring and summer 2023 (Lehmann et al., 2024). The dataset is complemented by additional site-, soil-, and tree-specific metadata. The samples and metadata were collected by different researchers across Europe following a standardized protocol. Soil samples were taken at up to 5 depths (ranging from 0 to 90 cm) and stem xylem samples from three beech and/or spruce trees per site. All samples were sent to a single laboratory, where all analytical work was conducted. Water was extracted using cryogenic vacuum distillation and analyzed with an isotope laser spectrometer. Additionally, a subset of the samples was analyzed with an isotope ratio mass spectrometer. Data quality checks revealed a high mean total extraction efficiency, mean absolute water amount (> 1 mL), as well as high analytical accuracy and precision. The water isotopic signature of soil and stem xylem water varied as a function of the geographic origin and changed from spring to summer across all sites. While δ2H and δ18O values were strongly correlated, the soil water data plotted closer to the Global Meteoric Water Line (GMWL) than the stem xylem water. Specifically, the δ2H values of the stem xylem were more enriched than those of the soil water, leading to a systematic deviation from the GMWL. Isotopic enrichment of the stem xylem water was larger for spruce than for beech trees at mixed forest sites. This dataset is particularly useful for large-scale studies on plant water use, ecohydrological model testing, and isotope mapping across Europe.",

keywords = "critical zone science, Europe, forest, hydrology, hydrogen isotopes, oxygen isotopes, root water uptake, soil water recharge, water stable isotopes, water sources",

author = "Lehmann, \{Marco M\} and Josie Geris and \{van Meerveld\}, Ilja and Daniele Penna and Youri Rothfuss and Matteo Verdone and Pertti Ala-aho and Matyas Arvai and Alise Babre and Philippe Balandier and Fabian Bernhard and Lukrecija Butorac and Carri{\`e}re, \{Simon Damien\} and Ceperley, \{Natalie C.\} and Zuosinan Chen and Alicia Correa and Haoyu Diao and David Dubbert and Maren Dubbert and Fabio Ercoli and Floriancic, \{Marius G.\} and Gimeno, \{Teresa E.\} and Damien Gounelle and Frank Hagedorn and Christophe Hissler and Fr{\'e}d{\'e}ric Huneau and Alberto Iraheta and Tamara Jakovljevi{\'c} and Nerantzis Kazakis and Zoltan Kern and Karl Knaebel and Johannes Kobler and Ji{\v r}{\'i} Kocum and Charlotte Koeber and Gerbrand Koren and Angelika K{\"u}bert and Dawid Kupka and \{Le Gall\}, Samuel and Aleksi Lehtonen and Thomas Leydier and Philippe Malagoli and \{Manca di Villahermosa\}, \{Francesca Sofia\} and Chiara Mancino and N{\'u}ria Mart{\'i}nez-Carreras and Nicolas Martin-StPaul and Hannu Marttila and \{Meyer Oliveira\}, Aline and Ga{\"e}l Monvoisin and Natalie Orlowski and Kadi Palmik-Das and Aurel Persoiu and Andrei Popa and Egor Prikaziuk and C{\'e}cile Quantin and Rinne-Garmston, \{Katja T\} and Clara Rohde and Martin Sanda and Matthias Saurer and Daniel Schulz and Stockinger, \{Michael Paul\} and Christine Stumpp and Jean-St{\'e}phane Venisse and Lukas Vlcek and Stylianos Voudouris and Bj{\"o}rn Weeser and Wilkinson, \{Mark E.\} and Giulia Zuecco and Katrin Meusburger",

note = " Data availability All data is freely available under the agreement “Creative Commons Zero - No Rights Reserved (CC0 1.0)” in the data repository EnviDat: Lehmann, M. M., Geris, J., van Meerveld, I., Penna, D., Rothfuss, Y., Verdone, M., Ala455 Aho, P., Arvai, M., Babre, A., Balandier, P., Bernhard, F., Butorac, L., Carri{\`e}re, S. D., Ceperley, N. C., Chen, Z., Correa, A., Diao, H., Dubbert, D., Dubbert, M., Ercoli, F., Floriancic, M. G., Gimeno, T. E., Gounelle, D., Hagedorn, F., Hissler, C., Huneau, F., Alberto, I., Jakovljevi{\'c}, T., Kazakis, N., Kern, Z., Knaebel, K., Kobler, J., Kocum, J., Koeber, C., Koren, G., K{\"u}bert, A., Kupka, D., le Gall, S., Lehtonen, A., Leydier, T., Malagoli, P., Manca di Villahermosa, F. S., Marchina, C., Mart{\'i}nez-Carreras, N., Martin-StPaul, N., Marttila, H., Meyer Oliveira, A., Monvoisin, G., Orlowski, N., Palmik-Das, K., Persoiu, A., Popa, A., Prikaziuk, E., Quantin, C., Rinne-Garmston, K. T., Rohde, C., Sanda, M., Saurer, M., Schulz, D., Stockinger, M. P., Stumpp, C., V{\'e}nisse, J.-S., Vlcek, L., Voudouris, S., Weeser, B., Wilkinson, M., Zuecco, G., and Meusburger, K.: Soil and stem xylem water isotope data from two pan-European sampling campaigns [dataset], https://www.doi.org/10.16904/envidat.542, 2024. ",

year = "2024",

month = oct,

day = "17",

doi = "10.5194/essd-2024-409",

language = "English",

publisher = "Copernicus Publications",

address = "Germany",

type = "WorkingPaper",

institution = "Copernicus Publications",

}

TY - UNPB

T1 - Soil and stem xylem water isotope data from two pan-European sampling campaigns

AU - Lehmann, Marco M

AU - Geris, Josie

AU - van Meerveld, Ilja

AU - Penna, Daniele

AU - Rothfuss, Youri

AU - Verdone, Matteo

AU - Ala-aho, Pertti

AU - Arvai, Matyas

AU - Babre, Alise

AU - Balandier, Philippe

AU - Bernhard, Fabian

AU - Butorac, Lukrecija

AU - Carrière, Simon Damien

AU - Ceperley, Natalie C.

AU - Chen, Zuosinan

AU - Correa, Alicia

AU - Diao, Haoyu

AU - Dubbert, David

AU - Dubbert, Maren

AU - Ercoli, Fabio

AU - Floriancic, Marius G.

AU - Gimeno, Teresa E.

AU - Gounelle, Damien

AU - Hagedorn, Frank

AU - Hissler, Christophe

AU - Huneau, Frédéric

AU - Iraheta, Alberto

AU - Jakovljević, Tamara

AU - Kazakis, Nerantzis

AU - Kern, Zoltan

AU - Knaebel, Karl

AU - Kobler, Johannes

AU - Kocum, Jiří

AU - Koeber, Charlotte

AU - Koren , Gerbrand

AU - Kübert, Angelika

AU - Kupka, Dawid

AU - Le Gall, Samuel

AU - Lehtonen, Aleksi

AU - Leydier, Thomas

AU - Malagoli, Philippe

AU - Manca di Villahermosa, Francesca Sofia

AU - Mancino, Chiara

AU - Martínez-Carreras, Núria

AU - Martin-StPaul, Nicolas

AU - Marttila, Hannu

AU - Meyer Oliveira, Aline

AU - Monvoisin, Gaël

AU - Orlowski, Natalie

AU - Palmik-Das, Kadi

AU - Persoiu, Aurel

AU - Popa, Andrei

AU - Prikaziuk, Egor

AU - Quantin, Cécile

AU - Rinne-Garmston, Katja T

AU - Rohde, Clara

AU - Sanda, Martin

AU - Saurer, Matthias

AU - Schulz, Daniel

AU - Stockinger, Michael Paul

AU - Stumpp, Christine

AU - Venisse, Jean-Stéphane

AU - Vlcek, Lukas

AU - Voudouris, Stylianos

AU - Weeser, Björn

AU - Wilkinson, Mark E.

AU - Zuecco, Giulia

AU - Meusburger, Katrin

N1 - Data availability All data is freely available under the agreement “Creative Commons Zero - No Rights Reserved (CC0 1.0)” in the data repository EnviDat: Lehmann, M. M., Geris, J., van Meerveld, I., Penna, D., Rothfuss, Y., Verdone, M., Ala455 Aho, P., Arvai, M., Babre, A., Balandier, P., Bernhard, F., Butorac, L., Carrière, S. D., Ceperley, N. C., Chen, Z., Correa, A., Diao, H., Dubbert, D., Dubbert, M., Ercoli, F., Floriancic, M. G., Gimeno, T. E., Gounelle, D., Hagedorn, F., Hissler, C., Huneau, F., Alberto, I., Jakovljević, T., Kazakis, N., Kern, Z., Knaebel, K., Kobler, J., Kocum, J., Koeber, C., Koren, G., Kübert, A., Kupka, D., le Gall, S., Lehtonen, A., Leydier, T., Malagoli, P., Manca di Villahermosa, F. S., Marchina, C., Martínez-Carreras, N., Martin-StPaul, N., Marttila, H., Meyer Oliveira, A., Monvoisin, G., Orlowski, N., Palmik-Das, K., Persoiu, A., Popa, A., Prikaziuk, E., Quantin, C., Rinne-Garmston, K. T., Rohde, C., Sanda, M., Saurer, M., Schulz, D., Stockinger, M. P., Stumpp, C., Vénisse, J.-S., Vlcek, L., Voudouris, S., Weeser, B., Wilkinson, M., Zuecco, G., and Meusburger, K.: Soil and stem xylem water isotope data from two pan-European sampling campaigns [dataset], https://www.doi.org/10.16904/envidat.542, 2024.

PY - 2024/10/17

Y1 - 2024/10/17

N2 - Stable isotope ratios of hydrogen (δ2H) and oxygen (δ18O) are crucial for studying ecohydrological dynamics in forests. However, most studies are confined to single sites, resulting in a lack of large-scale isotope data for understanding tree water uptake. Here, we provide a first systematic isotope dataset of soil and stem xylem water collected during two pan-European sampling campaigns at 40 beech (Fagus sylvatica), spruce (Picea abies), or mixed beech-spruce forest sites in spring and summer 2023 (Lehmann et al., 2024). The dataset is complemented by additional site-, soil-, and tree-specific metadata. The samples and metadata were collected by different researchers across Europe following a standardized protocol. Soil samples were taken at up to 5 depths (ranging from 0 to 90 cm) and stem xylem samples from three beech and/or spruce trees per site. All samples were sent to a single laboratory, where all analytical work was conducted. Water was extracted using cryogenic vacuum distillation and analyzed with an isotope laser spectrometer. Additionally, a subset of the samples was analyzed with an isotope ratio mass spectrometer. Data quality checks revealed a high mean total extraction efficiency, mean absolute water amount (> 1 mL), as well as high analytical accuracy and precision. The water isotopic signature of soil and stem xylem water varied as a function of the geographic origin and changed from spring to summer across all sites. While δ2H and δ18O values were strongly correlated, the soil water data plotted closer to the Global Meteoric Water Line (GMWL) than the stem xylem water. Specifically, the δ2H values of the stem xylem were more enriched than those of the soil water, leading to a systematic deviation from the GMWL. Isotopic enrichment of the stem xylem water was larger for spruce than for beech trees at mixed forest sites. This dataset is particularly useful for large-scale studies on plant water use, ecohydrological model testing, and isotope mapping across Europe.

AB - Stable isotope ratios of hydrogen (δ2H) and oxygen (δ18O) are crucial for studying ecohydrological dynamics in forests. However, most studies are confined to single sites, resulting in a lack of large-scale isotope data for understanding tree water uptake. Here, we provide a first systematic isotope dataset of soil and stem xylem water collected during two pan-European sampling campaigns at 40 beech (Fagus sylvatica), spruce (Picea abies), or mixed beech-spruce forest sites in spring and summer 2023 (Lehmann et al., 2024). The dataset is complemented by additional site-, soil-, and tree-specific metadata. The samples and metadata were collected by different researchers across Europe following a standardized protocol. Soil samples were taken at up to 5 depths (ranging from 0 to 90 cm) and stem xylem samples from three beech and/or spruce trees per site. All samples were sent to a single laboratory, where all analytical work was conducted. Water was extracted using cryogenic vacuum distillation and analyzed with an isotope laser spectrometer. Additionally, a subset of the samples was analyzed with an isotope ratio mass spectrometer. Data quality checks revealed a high mean total extraction efficiency, mean absolute water amount (> 1 mL), as well as high analytical accuracy and precision. The water isotopic signature of soil and stem xylem water varied as a function of the geographic origin and changed from spring to summer across all sites. While δ2H and δ18O values were strongly correlated, the soil water data plotted closer to the Global Meteoric Water Line (GMWL) than the stem xylem water. Specifically, the δ2H values of the stem xylem were more enriched than those of the soil water, leading to a systematic deviation from the GMWL. Isotopic enrichment of the stem xylem water was larger for spruce than for beech trees at mixed forest sites. This dataset is particularly useful for large-scale studies on plant water use, ecohydrological model testing, and isotope mapping across Europe.

KW - critical zone science

KW - Europe

KW - forest

KW - hydrology

KW - hydrogen isotopes

KW - oxygen isotopes

KW - root water uptake

KW - soil water recharge

KW - water stable isotopes

KW - water sources

U2 - 10.5194/essd-2024-409

DO - 10.5194/essd-2024-409

M3 - Preprint

BT - Soil and stem xylem water isotope data from two pan-European sampling campaigns

PB - Copernicus Publications

ER -

Soil and stem xylem water isotope data from two pan-European sampling campaigns

Abstract

Bibliographical note

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Keywords

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Soil and stem xylem water isotope data from two pan-European sampling campaigns

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