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Acclimation of fine roots systems to soil warming : Comparison of an experimental setup and a natural soil temperature gradient

Title data

Parts, Kaarin ; Tedersoo, Leho ; Schindlbacher, Andreas ; Sigurdsson, Bjarni D. ; Leblans, Niki I. W. ; Oddsdóttir, Edda S. ; Borken, Werner ; Ostonen, Ivika:
Acclimation of fine roots systems to soil warming : Comparison of an experimental setup and a natural soil temperature gradient.
In: Ecosystems. Vol. 22 (2019) . - pp. 457-472.
ISSN 1435-0629
DOI: https://doi.org/10.1007/s10021-018-0280-y

Abstract in another language

Global warming is predicted to impact high-latitude and high-altitude forests severely, jeopardizing their overall functioning and carbon storage, both of which depend on the warming response of tree fine root systems. This paper investigates the effect of soil warming on the biomass, morphology and colonizingectomycorrhizal community of spruce fine and absorptive fine roots. We compare the responses ofspruce roots growing at a man-made long-term soil warming (+ 4°C) experiment to results obtainedfrom a geothermal soil temperature gradient (+ 1 to + 14°C) extending to the forest die-off edge, to shedlight on the generalizability of the warming response and reveal any thresholds in acclimation ability.Trees in warmer soils formed longer and less-branched absorptive roots with higher specific root length and area, and lower root tissue density in both spruce stands, irrespective of warming methodand location. Soil warming at the experimental warming site also supported the occurrence of amore varied EcM community and an increase in the abundance of Tomentella spp., indicating a shift in nutrient foraging. Fine and absorptive fine root biomass decreased toward warmer soil, with a sharp reduction occurring between + 4 and + 6°C from the ambient and leading to the collapse of the fineroot system at the geothermal gradient. At the experimental warming site, the applied + 4°Cwarming had no effect on fine and absorptive fine root biomass. The similar fine root responses at thetwo warming sites suggest that the observations possibly reflect general acclimation patterns inspruce forests to global warming.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Soil Ecology
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 29 Jan 2020 13:25
Last Modified: 29 Jan 2020 13:25
URI: https://eref.uni-bayreuth.de/id/eprint/53878