Employing stable isotopes to determine the residence times of soil water and the temporal origin of water taken up by Fagus sylvatica and Picea abies in a temperate forest
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
 
ID 4480505
Author(s) Brinkmann, Nadine; Seeger, Stefan; Weiler, Markus; Buchmann, Nina; Eugster, Werner; Kahmen, Ansgar
Author(s) at UniBasel Kahmen, Ansgar
Year 2018
Title Employing stable isotopes to determine the residence times of soil water and the temporal origin of water taken up by Fagus sylvatica and Picea abies in a temperate forest
Journal The New phytologist
Volume 219
Number 4
Pages / Article-Number 1300-1313
Mesh terms Deuterium; Fagus, physiology; Forests; Isotope Labeling; Oxygen Isotopes; Picea, physiology; Plant Roots, metabolism; Rain; Regression Analysis; Soil, chemistry; Time Factors; Water, metabolism; Xylem, physiology
Abstract We assessed how the seasonal variability of precipitation δ; 2; H and δ; 18; O is propagated into soil and xylem waters of temperate trees, applied a hydrological model to estimate the residence time distribution of precipitation in the soil, and identified the temporal origin of water taken up by Picea abies and Fagus sylvatica over 4 yr. Residence times of precipitation in the soil varied between a few days and several months and increased with soil depth. On average, 50% of water consumed by trees throughout a year had precipitated during the growing season, while 40% had precipitated in the preceding winter or even earlier. Importantly, we detected subtle differences with respect to the temporal origin of water used by the two species. We conclude that both current precipitation and winter precipitation are important for the water supply of temperate trees and that winter precipitation could buffer negative impacts of spring or summer droughts. Our study additionally provides the means to obtain realistic estimates of source water δ; 2; H and δ; 18; O values for trees from precipitation isotope data, which is essential for improving model-based interpretations of δ; 18; O and δ; 2; H values in plants.
Publisher WILEY
ISSN/ISBN 1469-8137
edoc-URL https://edoc.unibas.ch/64632/
Full Text on edoc No
Digital Object Identifier DOI 10.1111/nph.15255
PubMed ID http://www.ncbi.nlm.nih.gov/pubmed/29888480
ISI-Number WOS:000440847600018
Document type (ISI) Journal Article
 
   

MCSS v5.8 PRO. 0.499 sec, queries - 0.000 sec ©Universität Basel  |  Impressum   |    
29/01/2023