Above- and belowground fluxes of methane from boreal dwarf shrubs and Pinus sylvestris seedlings

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Halmeenmäki , E , Heinonsalo , J , Putkinen , A , Santalahti , M , Fritze , H & Pihlatie , M 2017 , ' Above- and belowground fluxes of methane from boreal dwarf shrubs and Pinus sylvestris seedlings ' , Plant and Soil , vol. 420 , no. 1-2 , pp. 361-373 . https://doi.org/10.1007/s11104-017-3406-7

Title: Above- and belowground fluxes of methane from boreal dwarf shrubs and Pinus sylvestris seedlings
Author: Halmeenmäki, Elisa; Heinonsalo, Jussi; Putkinen, Anuliina; Santalahti, Minna; Fritze, Hannu; Pihlatie, Mari
Contributor: University of Helsinki, Department of Physics
University of Helsinki, Department of Food and Nutrition
University of Helsinki, Department of Physics
University of Helsinki, Department of Food and Nutrition
University of Helsinki, Department of Physics
Date: 2017-11
Number of pages: 13
Belongs to series: Plant and Soil
ISSN: 0032-079X
URI: http://hdl.handle.net/10138/307478
Abstract: The contribution of boreal forest plants to the methane (CH4) cycle is still uncertain. We studied the above and belowground CH4 fluxes of common boreal plants, and assessed the possible contribution of CH4 producing and oxidizing microbes (methanogens and methanotrophs, respectively) to the fluxes. We measured the CH4 fluxes and the amounts of methanogens and methanotrophs in the above- and belowground parts of Vaccinium myrtillus, Vaccinium vitis-idaea, Calluna vulgaris and Pinus sylvestris seedlings and in non-planted soil in a microcosm experiment. The shoots of C. vulgaris and P. sylvestris showed on average emissions of CH4, while the shoots of the Vaccinium species indicated small CH4 uptake. All the root-soil-compartments consumed CH4, however, the non-rooted soils showed on average small CH4 emission. We found methanotrophs from all the rooted and non-rooted soils. Methanogens were not detected in the plant or soil materials. The presence of plant roots seem to increase the amount of methanotrophs and thus CH4 uptake in the soil. The CH4 emissions from the shoots of C. vulgaris and P. sylvestris demonstrate that the plants have an important contribution to the CH4 exchange dynamics in the plant-soil systems.
Subject: Methane flux
Methanogens
Methanotrophs
Boreal forest
Plants
TEMPERATE FOREST SOILS
ATMOSPHERIC METHANE
NITROUS-OXIDE
PHOTOSYNTHETIC PRODUCTION
UV-RADIATION
SCOTS PINE
EMISSION
TREES
METHANOTROPHS
CONSUMPTION
114 Physical sciences
4112 Forestry
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