KAYLER, Zachary E.; BRÉDOIRE, Félix; MCMILLAN, Helene; BARSUKOV, Pavel A.; RUSALIMOVA, Olga; NIKITICH, Polina; BAKKER, Mark R.; ZELLER, Bernhard; FONTAINE, Sébastien; DERRIEN, Delphine

doi:10.1038/s41598-018-28977-8

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KAYLER, Zachary E.
Institute for Landscape Biogeochemistry
University of Idaho [Moscow, USA]
Lawrence Livermore National Laboratory [LLNL]

BRÉDOIRE, Félix
Unité de recherche Biogéochimie des Ecosystèmes Forestiers [BEF]
Interactions Sol Plante Atmosphère [UMR ISPA]

MCMILLAN, Helene

Langue

Article de revue

Ce document a été publié dans

Scientific Reports. 2018, vol. 8, n° 1, p. 1-12

Nature Publishing Group

Résumé en anglais

Southwest Siberia encompasses the forest-steppe and sub-taiga climatic zones and has historically been utilized for agriculture. Coinciding with predicted changes in climate for the region is the pressure of agricultural development; however, a characterization of the soil water and carbon dynamics is lacking. We assessed current soil water properties and soil organic carbon turnover in forests and grasslands for two sites that span the forest steppe and sub-taiga bioclimatic zones. Soil evaporation was 0.62±0.17mm d−1 (mean±standard error) in grasslands and 0.45±0.08mm d−1 in the forests of the forest-steppe site. Evaporation at the sub-taiga site was 1.80±1.70mm d−1 in grasslands and 0.96±0.05mm d−1 in forest plots. Evaporation was signifcantly greater at the sub-taiga site than the forest-steppe site. The density of fne roots explained the soil water isotopic patterns between vegetation types and sites. We found soil organic matter turnover to be three times faster in the sub-taiga site than in the forest-steppe site. Our results show that while climate factors, in particular snow levels, between the two sites are drivers for water and carbon cycles, site level hydrology, soil characteristics, and vegetation directly interact to infuence the water and carbon dynamics.< Réduire

Mots clés

hydrogen isotopy

évaporation

Mots clés en anglais

carbon turnover

carbon isotopy

URI

https://oskar-bordeaux.fr/handle/20.500.12278/196339

DOI

http://dx.doi.org/10.1038/s41598-018-28977-8

Project ANR

Recherches Avancées sur l'Arbre et les Ecosytèmes Forestiers

Origine

Importé de hal

Unités de recherche

Interactions Soil Plant Atmosphere (ISPA) - UMR 1391