气候变化领域集成服务门户(CCPortal): Microbial communities associated with decomposing deadwood of downy birch in a natural forest in Khibiny Mountains (Kola Peninsula, Russian Federation)

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DOI	10.1016/j.foreco.2019.117643
	Microbial communities associated with decomposing deadwood of downy birch in a natural forest in Khibiny Mountains (Kola Peninsula, Russian Federation)
	Pastorelli R.; Paletto A.; Agnelli A.E.; Lagomarsino A.; De Meo I.
发表日期	2020
ISSN	0378-1127
卷号	455
英文摘要	Deadwood plays an important role in the forest ecosystems, providing nutrients and habitat for a wide range of organisms, preventing soil erosion, and improving carbon storage. Microorganisms are primary agents in wood decomposition. The aim of the present research is to describe the changes in diversity, structure and abundance of microbial communities over downy birch lying deadwood decomposition in a boreal forest under natural conditions. This study also included investigations on the potential involvement of deadwood in climate change. The decomposition of deadwood was visually assessed using a five-class system. The microbial community diversity and composition were assessed with polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE) fingerprinting. Real time PCR was used to evaluate the absolute and relative microbial abundance. The potential involvement of deadwood in climate change was assessed by in situ-measuring of the carbon dioxide (CO2) emissions from downy birch lying deadwood and from soil. The results obtained indicate that deadwood represents a substrate whose physico-chemical and microbiological property change with time. Higher diversity of fungi, bacteria, and archaea were recorded in the decay class 5. Conversely, actinobacteria showed the lowest values of diversity in decay class 5. We observed a succession of dominant microbial taxa over the decomposition progress. Overall, the abundance of each microbial group increases with the advance of decomposition. Among the estimated physico-chemical properties, nitrogen content, that increased with decay, and pH were the most important candidate drivers of microbial community composition and abundance. CO2 emissions were recorded higher in the decay class 5 and in soil of plots with the highest amount of lying deadwood. Bacteria dominated the microbial community and may play a more important role in the late stages of wood decomposition conversely to fungi and actinobacteria that are assumed to be primary involved in early stages of wood colonization. Archaea are shown to be an integral and dynamic component of decaying wood biota. The presence of large amounts of deadwood may affect greenhouse gas (GHG) emissions, especially in the event of an increase in temperatures that could reduce the carbon (C) sink capacity of the boreal forests. © 2019 Elsevier B.V.
关键词	Bacteria Carbon dioxide Decay (organic)Ecosystems Electrophoresis Forestry Fungi Gas emissions Greenhouse gases pH Polymerase chain reaction Soils Wood Deadwood Decay class Khibiny Mountains Microbial abundances Microbial diversity Climate change bacterium boreal forest carbon emission carbon sink climate change community composition dead wood deciduous forest deciduous tree decomposition fungus microbial community prokaryote Khibiny Massif Kola Peninsula Murmansk [Russian Federation]Russian Federation Actinobacteria Bacteria (microorganisms)Betula pubescens Fungi
语种	英语
来源机构	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/133171
推荐引用方式 GB/T 7714	Pastorelli R.,Paletto A.,Agnelli A.E.,et al. Microbial communities associated with decomposing deadwood of downy birch in a natural forest in Khibiny Mountains (Kola Peninsula, Russian Federation)[J]. Forest Ecology and Management,2020,455.
APA	Pastorelli R.,Paletto A.,Agnelli A.E.,Lagomarsino A.,&De Meo I..(2020).Microbial communities associated with decomposing deadwood of downy birch in a natural forest in Khibiny Mountains (Kola Peninsula, Russian Federation).,455.
MLA	Pastorelli R.,et al."Microbial communities associated with decomposing deadwood of downy birch in a natural forest in Khibiny Mountains (Kola Peninsula, Russian Federation)".455(2020).