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Forests 2015, 6(7), 2484-2504; doi:10.3390/f6072484

Drivers of CO2 Emission Rates from Dead Wood Logs of 13 Tree Species in the Initial Decomposition Phase

1
Chair of Silviculture, Faculty of Environment and Natural Resources, University of Freiburg, Tennenbacherstraße 4, Freiburg im Breisgau 79106, Germany
2
Department of Systematic Botany and Functional Biodiversity, Institute of Biology, University of Leipzig, Johannisallee 21-23, Leipzig 04103, Germany
3
Department of Molecular Evolution and Plant Systematics, Institute of Biology, University of Leipzig, Johannisallee 21-23, Leipzig 04103, Germany
4
German Center for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Deutscher Platz 5, Leipzig 04103, Germany
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editors: Maarten Nieuwenhuis and Brian Tobin
Received: 8 May 2015 / Revised: 7 July 2015 / Accepted: 13 July 2015 / Published: 20 July 2015
(This article belongs to the Special Issue Greenhouse Gas Fluxes from Below and Aboveground Forest Deadwood)
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Abstract

Large dead wood is an important structural component of forest ecosystems and a main component of forest carbon cycles. CO2 emissions from dead wood can be used as a proxy for actual decomposition rates. The main drivers of CO2 emission rates for dead wood of temperate European tree species are largely unknown. We applied a novel, closed chamber measurement technique to 360 dead wood logs of 13 important tree species in three regions in Germany. We found that tree species identity was with 71% independent contribution to the model (R2 = 0.62) the most important driver of volume-based CO2 emission rates, with angiosperms having on average higher rates than conifers. Wood temperature and fungal species richness had a positive effect on CO2 emission rates, whereas wood density had a negative effect. This is the first time that positive fungal species richness—wood decomposition relationship in temperate forests was shown. Certain fungal species were associated with high or low CO2 emission rates. In addition, as indicated by separate models for each tree species, forest management intensity, study region, and the water content as well as C and N concentration of dead wood influenced CO2 emission rates. View Full-Text
Keywords: wood-inhabiting fungi; temperate forests; Biodiversity Exploratories; forest management; infrared gas analyzer wood-inhabiting fungi; temperate forests; Biodiversity Exploratories; forest management; infrared gas analyzer
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Kahl, T.; Baber, K.; Otto, P.; Wirth, C.; Bauhus, J. Drivers of CO2 Emission Rates from Dead Wood Logs of 13 Tree Species in the Initial Decomposition Phase. Forests 2015, 6, 2484-2504.

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