TY - JOUR
T1 - Tree water uptake patterns across the globe
AU - Bachofen, Christoph
AU - Tumber-Dávila, Shersingh Joseph
AU - Mackay, D. Scott
AU - McDowell, Nate G.
AU - Carminati, Andrea
AU - Klein, Tamir
AU - Stocker, Benjamin D.
AU - Mencuccini, Maurizio
AU - Grossiord, Charlotte
N1 - Publisher Copyright: © 2024 The Authors. New Phytologist © 2024 New Phytologist Foundation.
PY - 2024/6
Y1 - 2024/6
N2 - Summary Plant water uptake from the soil is a crucial element of the global hydrological cycle and essential for vegetation drought resilience. Yet, knowledge of how the distribution of water uptake depth (WUD) varies across species, climates, and seasons is scarce relative to our knowledge of aboveground plant functions. With a global literature review, we found that average WUD varied more among biomes than plant functional types (i.e. deciduous/evergreen broadleaves and conifers), illustrating the importance of the hydroclimate, especially precipitation seasonality, on WUD. By combining records of rooting depth with WUD, we observed a consistently deeper maximum rooting depth than WUD with the largest differences in arid regions???indicating that deep taproots act as lifelines while not contributing to the majority of water uptake. The most ubiquitous observation across the literature was that woody plants switch water sources to soil layers with the highest water availability within short timescales. Hence, seasonal shifts to deep soil layers occur across the globe when shallow soils are drying out, allowing continued transpiration and hydraulic safety. While there are still significant gaps in our understanding of WUD, the consistency across global ecosystems allows integration of existing knowledge into the next generation of vegetation process models.
AB - Summary Plant water uptake from the soil is a crucial element of the global hydrological cycle and essential for vegetation drought resilience. Yet, knowledge of how the distribution of water uptake depth (WUD) varies across species, climates, and seasons is scarce relative to our knowledge of aboveground plant functions. With a global literature review, we found that average WUD varied more among biomes than plant functional types (i.e. deciduous/evergreen broadleaves and conifers), illustrating the importance of the hydroclimate, especially precipitation seasonality, on WUD. By combining records of rooting depth with WUD, we observed a consistently deeper maximum rooting depth than WUD with the largest differences in arid regions???indicating that deep taproots act as lifelines while not contributing to the majority of water uptake. The most ubiquitous observation across the literature was that woody plants switch water sources to soil layers with the highest water availability within short timescales. Hence, seasonal shifts to deep soil layers occur across the globe when shallow soils are drying out, allowing continued transpiration and hydraulic safety. While there are still significant gaps in our understanding of WUD, the consistency across global ecosystems allows integration of existing knowledge into the next generation of vegetation process models.
UR - http://www.scopus.com/inward/record.url?scp=85193023216&partnerID=8YFLogxK
U2 - https://doi.org/10.1111/nph.19762
DO - https://doi.org/10.1111/nph.19762
M3 - مقالة مرجعية
C2 - 38649790
SN - 0028-646X
VL - 242
SP - 1891
EP - 1910
JO - NEW PHYTOLOGIST
JF - NEW PHYTOLOGIST
IS - 5
ER -