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Carbon and oxygen dual-isotopes indicate alternative physiological mechanisms opted by European beech trees to survive drought stress

Chakraborty, Tamalika 1; Reif, Albert; Matzarakis, Andreas; Helle, Gerhard; Faßnacht, Fabian ORCID iD icon 1; Saha, Somidh 1,2
1 Institut für Geographie und Geoökologie (IFGG), Karlsruher Institut für Technologie (KIT)
2 Institut für Technikfolgenabschätzung und Systemanalyse (ITAS), Karlsruher Institut für Technologie (KIT)


Poor drought tolerance of European beech trees raised concerns in Europe. We hypothesized that beech could show an opposite physiological response to the same level of climatic drought with change in edaphic drought. We performed a combined analysis of δ$^{13}$C and δ$^{18}$O in tree rings to reveal retrospective temporal physiological responses of trees to drought. The edaphic drought was assessed by quantifying the capacity of soil to store water in plots (classified as “dry” and “less-dry”) near the drought limit of the species in three near-natural oak-beech ecotones in Germany and Switzerland. Neighbourhood competition was quantified. A climatic drought index was calculated from meteorological records and related to the δ$^{13}$C and δ$^{18}$O values of the trees. Trees from dry plots showed a higher response to drought and climatic dependency than less-dry plots. Neighbourhood competetion increased δ$^{18}$O values significantly. Dual isotope analysis shows a tendency of greater stomatal resistance in dry plots and higher stomatal conductance in less-dry plots. We conclude that beech trees belonging to the same population under changing soil water availability can show different physiological responses under climatic drought stress. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000153663
Veröffentlicht am 12.01.2023
DOI: 10.1080/02827581.2022.2155236
Zitationen: 4
Web of Science
Zitationen: 4
Zitationen: 4
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Geographie und Geoökologie (IFGG)
Institut für Technikfolgenabschätzung und Systemanalyse (ITAS)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2022
Sprache Englisch
Identifikator ISSN: 0282-7581, 1651-1891
KITopen-ID: 1000153663
HGF-Programm 37.11.02 (POF IV, LK 01) Societally-Feasible Transformation Pathways
Erschienen in Scandinavian journal of forest research
Verlag Taylor and Francis
Band 37
Heft 5-8
Seiten 295-313
Vorab online veröffentlicht am 08.12.2022
Externe Relationen Siehe auch
Schlagwörter Available soil water storage capacity, drought limit, Fagus sylvatica L, oak-beech ecotone, potential evapotranspiration, stable C and O isotopes in tree rings, water balance model
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