Leaf isotopes reveal tree diversity effects on the functional responses to the pan-European 2018 summer drought.

Autor: Jing X; State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems, and College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, 730020, China.; Department of Earth and Environmental Sciences, KU Leuven, Leuven, 3001, Belgium., Baum C; Soil Science, Faculty of Agricultural and Environmental Sciences, University of Rostock, Justus-von-Liebig-Weg 6, Rostock, 18059, Germany., Castagneyrol B; BIOGECO, INRAE, University of Bordeaux, Cestas, 33610, France., Eisenhauer N; German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Puschstrasse 4, Leipzig, 04103, Germany.; Institute of Biology, Leipzig University, Puschstrasse 4, Leipzig, 04103, Germany., Ferlian O; German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Puschstrasse 4, Leipzig, 04103, Germany.; Institute of Biology, Leipzig University, Puschstrasse 4, Leipzig, 04103, Germany., Gebauer T; Geobotany, Faculty of Biology, University of Freiburg, Schänzlestr. 1, Freiburg, 79104, Germany., Hajek P; Geobotany, Faculty of Biology, University of Freiburg, Schänzlestr. 1, Freiburg, 79104, Germany., Jactel H; BIOGECO, INRAE, University of Bordeaux, Cestas, 33610, France., Muys B; Department of Earth and Environmental Sciences, KU Leuven, Leuven, 3001, Belgium., Nock CA; Geobotany, Faculty of Biology, University of Freiburg, Schänzlestr. 1, Freiburg, 79104, Germany.; Renewable Resources, Faculty of Agriculture, Life and Environmental Sciences, University of Alberta, Edmonton, AB, T6G 2R3, Canada., Ponette Q; Earth and Life Institute, Université catholique de Louvain, Croix du Sud 2 - box L7.05.24, Louvain-la-Neuve, 1348, Belgium., Rose L; Geobotany, Faculty of Biology, University of Freiburg, Schänzlestr. 1, Freiburg, 79104, Germany.; Ministry of Environment, Climate, Energy and Agriculture (BUKEA), Hamburg, 21109, Germany., Saurer M; Forest Dynamics, Swiss Federal Research Institute WSL Birmensdorf, Zuercherstrasse 111, Birmensdorf, 8903, Switzerland., Scherer-Lorenzen M; Geobotany, Faculty of Biology, University of Freiburg, Schänzlestr. 1, Freiburg, 79104, Germany., Verheyen K; Forest & Nature Lab, Campus Gontrode, Department of Environment, Ghent University, Melle-Gontrode, 9090, Belgium., Van Meerbeek K; Department of Earth and Environmental Sciences, KU Leuven, Leuven, 3001, Belgium.; KU Leuven Plant Institute, KU Leuven, Leuven, 3001, Belgium.
Jazyk: angličtina
Zdroj: The New phytologist [New Phytol] 2024 Aug; Vol. 243 (4), pp. 1312-1328. Date of Electronic Publication: 2024 Jun 27.
DOI: 10.1111/nph.19931
Abstrakt: Recent droughts have strongly impacted forest ecosystems and are projected to increase in frequency, intensity, and duration in the future together with continued warming. While evidence suggests that tree diversity can regulate drought impacts in natural forests, few studies examine whether mixed tree plantations are more resistant to the impacts of severe droughts. Using natural variations in leaf carbon (C) and nitrogen (N) isotopic ratios, that is δ 13 C and δ 15 N, as proxies for drought response, we analyzed the effects of tree species richness on the functional responses of tree plantations to the pan-European 2018 summer drought in seven European tree diversity experiments. We found that leaf δ 13 C decreased with increasing tree species richness, indicating less drought stress. This effect was not related to drought intensity, nor desiccation tolerance of the tree species. Leaf δ 15 N increased with drought intensity, indicating a shift toward more open N cycling as water availability diminishes. Additionally, drought intensity was observed to alter the influence of tree species richness on leaf δ 15 N from weakly negative under low drought intensity to weakly positive under high drought intensity. Overall, our findings suggest that dual leaf isotope analysis helps understand the interaction between drought, nutrients, and species richness.
(© 2024 The Authors. New Phytologist © 2024 New Phytologist Foundation.)
Databáze: MEDLINE
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