What question did this study set out to answer?

This research aims to understand the factors that influence tree water uptake in a pre-Alpine environment by analyzing water sources and their isotopic compositions.

March 28, 2026Open Access

Seasonal Variation in Tree Water Uptake in a Pre-Alpine Catchment (Alptal, CH): A Stable Isotope Study

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This research aims to understand the factors that influence tree water uptake in a pre-Alpine environment by analyzing water sources and their isotopic compositions.
Sampled twig and stem core xylem water, bulk and mobile soil water at five sites on five separate days.
Analyzed isotopic composition (δ2H and δ18O) in relation to precipitation, soil moisture, and environmental data.
Calculated contributions of shallow and deep soil water to tree water uptake using the MixSIAR model.
All water sources showed enrichment in heavy isotopes during August, linked to summer evaporation and autumn snowfall.
Twig xylem water samples exhibited a positive lc-excess, suggesting possible dew or fog uptake.
No clear spatial or temporal trends in water uptake depth (WUD) were observed, attributed to high model uncertainty and small sample size.

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Implication

This thesis investigates tree water uptake variability in a pre-Alpine catchment, indicating complex interactions within the ecosystem.

Cite This Study

Meret Vogler (2025) studied this question.

synapsesocial.com/papers/69c771838bbfbc51511e17c9 https://doi.org/10.5167/uzh-293130

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Seasonal Variation in Tree Water Uptake in a Pre-Alpine Catchment (Alptal, CH): A Stable Isotope Study

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Discussion

Implication

Cite This Study

Seasonal Variation in Tree Water Uptake in a Pre-Alpine Catchment (Alptal, CH): A Stable Isotope Study

Key Points

Discussion

Implication

Cite This Study

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