Sap flux and stable isotopes of water show contrasting tree water uptake strategies in two co‐occurring tropical rainforest tree species

Md. Shawkat I. Sohel; John L. Herbohn; Ying Zhao; Jeffrey J. McDonnell

doi:10.1002/eco.2589

Back

Sap flux and stable isotopes of water show contrasting tree water uptake strategies in two co‐occurring tropical rainforest tree species

Journal article

Peer reviewed

Sap flux and stable isotopes of water show contrasting tree water uptake strategies in two co‐occurring tropical rainforest tree species

Md. Shawkat I. Sohel, John L. Herbohn, Ying Zhao and Jeffrey J. McDonnell

Ecohydrology, Vol.16(8), pp.1-16

2023

DOI: https://doi.org/10.1002/eco.2589

Files and links (1)

url

https://doi.org/10.1002/eco.2589View

Published Version

Abstract

dual isotope

tree water consumption

tree water storage

wood anatomy

xylem water isotope

The short‐term dynamics of tree water use strategies for neighbouring co‐occurring species are poorly understood. Here, we quantify the high frequency changes in water sources and sap flux patterns of two commonly co‐occurring tropical rainforest tree species: Dendrocnide photinophylla (Kunth; Chew) and Argyrodendron peralatum (F.M. Bailey; Edlin ex J.H. Boas). A combination of continuous sap flux measurements and hourly sampling of xylem water stable isotope composition (δD and δ 18 O) were used to observe water use strategies during a 24‐h transpiration cycle. Sap flux ranged between 2.82 and 28.50 L day −1 , with A. peralatum recording a 67% higher rate than D. photinophylla . For both tree species, sap flux increased with tree size and diurnal sap flux increase resulted in more isotopically enriched xylem water. A Bayesian Mixing Model analysis, which used sampled soil water isotopic composition from five soil depths ranging from of 0 to 1 m, revealed that D. photinophylla primarily used water from very shallow depth or soil surface layer (2–60 cm), while A. peralatum sourced its water mostly from deeper layers (60–100 cm). We propose that these differences in species' water consumption patterns are related to plant water storage capacity and wood anatomical features. This research demonstrates that combining xylem isotope composition and sap flux measurements can help reveal species‐specific water use strategies, which can be beneficial for improved process understanding in ecohydrological modelling.

Details

Title: Sap flux and stable isotopes of water show contrasting tree water uptake strategies in two co‐occurring tropical rainforest tree species
Authors: Md. Shawkat I. Sohel (Corresponding Author) - University of the Sunshine Coast, Queensland, Tropical Forests & People Research Centre
John L. Herbohn (Author) - University of the Sunshine Coast, Queensland, Tropical Forests & People Research Centre
Ying Zhao (Author) - University of Saskatchewan
Jeffrey J. McDonnell (Author) - University of Saskatchewan
Publication details: Ecohydrology, Vol.16(8), pp.1-16
Publisher: Springer Singapore
DOI: 10.1002/eco.2589
ISSN: 2522-8250
Grant note: Australian Government International Postgraduate Research Scholarship (IPRS) Wet Tropics Management Authority, Australia
Organisation Unit: Australian Centre for Pacific Islands Research; University of the Sunshine Coast, Queensland; Tropical Forests & People Research Centre; Forest Research Institute
Language: English
Record Identifier: 99968898402621
Output Type: Journal article

Metrics

9 Record Views

InCites Highlights

These are selected metrics from InCites Benchmarking & Analytics tool, related to this output

Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Ecology; Environmental Sciences; Water Resources

UN Sustainable Development Goals (SDGs)

This output has contributed to the advancement of the following goals:

Source: InCites