10.5061/DRYAD.827VF48
Goldsmith, Gregory R.
Chapman University
Paul Scherrer Institute
Allen, Scott T.
Paul Scherrer Institute
Braun, Sabine
Swiss Federal Institute of Technology in Zurich
Engbersen, Nadine
Swiss Federal Institute of Technology in Zurich
Romero González-Quijano, Clara
Leibniz Institute of Freshwater Ecology and Inland Fisheries
Kirchner, James W.
Swiss Federal Institute for Forest, Snow and Landscape Research
Siegwolf, Rolf T.W.
Paul Scherrer Institute
Data from: Spatial variation in throughfall, soil, and plant water
isotopes in a temperate forest
Dryad
dataset
2018
root water uptake
hydrogen isotopes
mixing models
leaf water enrichment
Picea abies
ecohydrologic separation
Fagus sylvatica
2018-12-05T14:23:34Z
2018-12-05T14:23:34Z
en
https://doi.org/10.1002/eco.2059
36376 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Studies of stable isotopes of water in the environment have been
fundamental to advancing our understanding of how water moves through the
soil-plant-atmosphere continuum; however, much of this research focuses on
how water isotopes vary in time, rather than in space. We examined the
spatial variation in the δ18O and δ2H of throughfall and bulk soil water,
as well as branch xylem and bulk leaf water of Picea abies (Norway Spruce)
and Fagus sylvatica (Beech), in a 1 ha forest plot in the northern Alps of
Switzerland. Means and ranges of water isotope ratios varied considerably
among throughfall, soil, and xylem samples. Soil water isotope ratios were
often poorly explained by soil characteristics and often not predictable
from proximal samples. Branch xylem water isotope values varied less than
either soil water or bulk leaf water. The isotopic range observed within
an individual tree crown was often similar to that observed among
different crowns. As a result of the heterogeneity in isotope ratios,
inferences about the depth of plant root water uptake drawn from a two
end-member mixing model were highly sensitive to the soil sampling
location. Our results clearly demonstrate that studies using water
isotopes to infer root water uptake must explicitly consider how to
characterize soil water, incorporating measures of both vertical and
lateral variation. By accounting for this spatial variation and the
processes that shape it, we can improve the application of water isotopes
to studies of plant ecophysiology, ecohydrology, soil hydrology, and
paleoclimatology.
Goldsmithetal_2018EcohydrologyDataData on stable isotopes of water in the
environment collected from a 1 ha forest plot in Switzerland, as described
in Goldsmith et al. (2018) published in Ecohydrology. Headers are
described in metadata tab. Ancillary data available upon request to first
author.Goldsmithetal_EcohydrologyData.xlsx
Switzerland