TIAN, Feng; WIGNERON, Jean-Pierre; CIAIS, Philippe; CHAVE, Jérôme; OGÉE, Jérôme; PENUELAS, Josep; RÆBILD, Anders; DOMEC, Jean-Christophe; TONG, Xiaoye; BRANDT, Martin; MIALON, Arnaud; RODRIGUEZ‐FERNANDEZ, Nemesio; TAGESSON, Torbern; AL-YAARI, Amen; KERR, Yann H.; CHEN, Chi; MYNENI, Ranga; ZHANG, Wenmin; ARDO, Jonas; FENSHOLT, Rasmus

doi:10.1038/s41559-018-0630-3

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TIAN, Feng
Tsinghua University [Beijing] [THU]

WIGNERON, Jean-Pierre
Interactions Sol Plante Atmosphère [UMR ISPA]

CIAIS, Philippe
Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE]

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Article de revue

Ce document a été publié dans

Nature Ecology & Evolution. 2018, vol. 2, n° 9, p. 1428-1435

Nature

Résumé en anglais

Plant water storage is fundamental to the functioning of terrestrial ecosystems by participating in plant metabolism, nutrient and sugar transport, and maintenance of the integrity of the hydraulic system of the plant. However, a global view of the size and dynamics of the water pools stored in plant tissues is still lacking. Here, we report global patterns of seasonal variations in ecosystem-scale plant water storage and their relationship with leaf phenology, based on space-borne measurements of L-band vegetation optical depth. We find that seasonal variations in plant water storage are highly synchronous with leaf phenology for the boreal and temperate forests, but asynchronous for the tropical woodlands, where the seasonal development of plant water storage lags behind leaf area by up to 180 days. Contrasting patterns of the time lag between plant water storage and terrestrial groundwater storage are also evident in these ecosystems. A comparison of the water cycle components in seasonally dry tropical woodlands highlights the buffering effect of plant water storage on the seasonal dynamics of water supply and demand. Our results offer insights into ecosystem-scale plant water relations globally and provide a basis for an improved parameterization of eco-hydrological and Earth system models.< Réduire

URI

https://oskar-bordeaux.fr/handle/20.500.12278/194989

DOI

http://dx.doi.org/10.1038/s41559-018-0630-3

Projet Européen

Effects of phosphorus limitations on Life, Earth system and Society

Project ANR

CEnter of the study of Biodiversity in Amazonia
Towards a Unified theory of biotic Interactions: the roLe of environmental

Origine

Importé de hal

Unités de recherche

Interactions Soil Plant Atmosphere (ISPA) - UMR 1391