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Publications

NIBIOs employees contribute to several hundred scientific articles and research reports every year. You can browse or search in our collection which contains references and links to these publications as well as other research and dissemination activities. The collection is continously updated with new and historical material.

NIBIO's Scientific Publications →

2015

Authors

Ari Hietala Harald Kvaalen Peter Dörsch Halvor Solheim

Abstract

No abstract has been registered

To document

Authors

Nicola La Porta Gaurav Sablok Giovanni Emilliani Ari Hietala Alessio Giovannelli Paolo Fontana Emilio Potenza Paolo Baldi

Abstract

No abstract has been registered

Authors

I. Matsiakh Halvor Solheim Nina Elisabeth Nagy Ari Hietala

Abstract

No abstract has been registered

Authors

Ari Hietala Isabella Børja Hugh Cross Volkmar Timmermann Nina Elisabeth Nagy Halvor Solheim Jørn Henrik Sønstebø adam vivian smith

Abstract

No abstract has been registered

Authors

I. Matsiakh Halvor Solheim Nina Elisabeth Nagy Ari Hietala V. Kramarets

Abstract

No abstract has been registered

To document

Authors

Ari Hietala Peter Dörsch Harald Kvaalen Halvor Solheim

Abstract

Globally, billions of tons of carbon sequestered in trees are annually recycled back to the atmosphere through wood decomposition by microbes. In Norway, every fifth Norway spruce shows at final harvest infection by pathogenic white-rot fungi in the genera Heterobasidion and Armillaria. As these fungi can mineralize all components of wood, we predicted that they have a significant carbon footprint. Gas samples taken from infected stems were analyzed for CO2 and CH4 concentrations, and wood samples from different parts of the decay columns were incubated under hypoxic (4% O2) and anoxic laboratory conditions. In spring and summer the stem concentrations of CO2 were generally two times higher in trees with heartwood decay than in healthy trees. For most of the healthy trees and trees with heartwood decay, mean stem concentrations of CH4 were comparable to ambient air, and only some Armillaria infected trees showed moderately elevated CH4. Consistently, low CH4 production potentials were recorded in the laboratory experiment. Up-scaling of CO2 efflux due to wood decay in living trees suggests that the balance between carbon sequestration and emission may be substantially influenced in stands with high frequency of advanced root and stem heartwood decay.

Authors

O. Janne Kjønaas Nicholas Clark Toril Drabløs Eldhuset Ari Hietala Hugh Cross Kjersti Holt Hansen Tonje Økland Holger Lange Jørn-Frode Nordbakken Ingvald Røsberg

Abstract

No abstract has been registered

To document

Authors

Jonas Oliva S. Rommel Carl Gunnar Fossdal Ari Hietala M. Nemesio-Gorriz Halvor Solheim Malin Elfstrand

Abstract

No abstract has been registered

Authors

Ari Hietala Isabella Børja Hugh Cross Nina Elisabeth Nagy Halvor Solheim Jørn Henrik Sønstebø Volkmar Timmermann Adam Vivian-Smith

Abstract

No abstract has been registered

Authors

Ari Hietala Hugh Cross Isabella Børja Nina Elisabeth Nagy Volkmar Timmermann Halvor Solheim Jørn Henrik Sønstebø Adam Vivian-Smith

Abstract

No abstract has been registered