Coupling of ecosystem-scale plant water storage and leaf phenology observed by satellite
Tian, Feng (Lunds Universitet. Institutionen för naturgeografi och ekosystemvetenskap)
Wigneron, Jean-Pierre (Institut National de la Recherche Agronomique (França))
Ciais, Philippe (Laboratoire des Sciences du Climat et de l'Environnement)
Chave, Jerome (Laboratoire Evolution et Diversité Biologique)
Ogée, Jérôme (Institut National de la Recherche Agronomique (França))
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Ræbild, Anders (Københavns Universitet. Institut for Geovidenskab og Naturforvaltning)
Domec, Jean-Christophe (Bordeaux Sciences Agro)
Tong, Xiaoye (Københavns Universitet. Institut for Geovidenskab og Naturforvaltning)
Brandt, Martin (Københavns Universitet. Institut for Geovidenskab og Naturforvaltning)
Mialon, Arnaud (Centre d'Etudes Spatiales de la BIOsphère)
Rodriguez-Fernandez, Nemesio (Centre d'Etudes Spatiales de la BIOsphère)
Tagesson, Torbern (Lunds Universitet. Institutionen för naturgeografi och ekosystemvetenskap)
Al-Yaari, Amen (Institut National de la Recherche Agronomique (França))
Kerr, Yann (Centre d'Etudes Spatiales de la BIOsphère)
Chen, Chi (Boston University. Department of Earth and Environment)
Myneni, Ranga B. (Boston University. Department of Earth and Environment)
Zhang, Wenmin (Københavns Universitet. Institut for Geovidenskab og Naturforvaltning)
Ardö, Jonas (Lunds Universitet. Institutionen för naturgeografi och ekosystemvetenskap)
Fensholt, Rasmus (Københavns Universitet. Institut for Geovidenskab og Naturforvaltning)

Date:	2018
Abstract:	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.
Grants:	European Commission 746347 European Commission 610028
Rights:	Tots els drets reservats.
Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Published in:	Nature ecology & evolution, Vol. 2, issue 9 (Sep. 2018) , p. 1428-1435, ISSN 2397-334X

DOI: 10.1038/s41559-018-0630-3

Postprint 36 p, 3.1 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals) > Imbalance-P
Articles > Research articles
Articles > Published articles