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Winter climate controls soil carbon dynamics during summer in boreal forests

Title data

Haei, Mahsa ; Öquist, Mats G. ; Kreyling, Jürgen ; Ilstedt, Ulrik ; Laudon, Hjalmar:
Winter climate controls soil carbon dynamics during summer in boreal forests.
In: Environmental Research Letters. Vol. 8 (2013) Issue 2 . - 024017.
ISSN 1748-9326
DOI: https://doi.org/10.1088/1748-9326/8/2/024017

Abstract in another language

Boreal forests, characterized by distinct winter seasons, store a large proportion of the global terrestrial carbon (C) pool. We studied summer soil C-dynamics in a boreal forest in northern Sweden using a seven-year experimental manipulation of soil frost. We found that winter soil climate conditions play a major role in controlling the dissolution/mineralization of soil organic-C in the following summer season. Intensified soil frost led to significantly higher concentrations of dissolved organic carbon (DOC). Intensified soil frost also led to higher rates of basal heterotrophic CO2 production in surface soil samples. However, frost-induced decline in the in situ soil CO2 concentrations in summer suggests a substantial decline in root and/or plant associated rhizosphere CO2 production, which overrides the effects of increased heterotrophic CO2 production. Thus, colder winter soils, as a result of reduced snow cover, can substantially alter C-dynamics in boreal forests by reducing summer soil CO2 efflux, and increasing DOC losses.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER115498
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Biogeography
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 24 Apr 2015 11:56
Last Modified: 26 May 2015 12:48
URI: https://eref.uni-bayreuth.de/id/eprint/11402