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Experimental soil warming shifts the fungal community composition at the alpine treeline
- Publication Year :
- 2017
-
Abstract
- Increased CO2 emissions and global warming may alter the composition of fungal communities through the removal of temperature limitation in the plant–soil system, faster nitrogen (N) cycling and changes in the carbon (C) allocation of host plants to the rhizosphere. At a Swiss treeline featuring Larix decidua and Pinus uncinata, the effects of multiple years of CO2 enrichment and experimental soil warming on the fungal community composition in the organic horizons were analysed using 454-pyrosequencing of ITS2 amplicons. Sporocarp production and colonization of ectomycorrhizal root tips were investigated in parallel. Fungal community composition was significantly altered by soil warming, whereas CO2 enrichment had little effect. Tree species influenced fungal community composition and the magnitude of the warming responses. The abundance of ectomycorrhizal fungal taxa was positively correlated with N availability, and ectomycorrhizal taxa specialized for conditions of high N availability proliferated with warming, corresponding to considerable increases in inorganic N in warmed soils. Traits related to N utilization are important in determining the responses of ectomycorrhizal fungi to warming in N-poor cold ecosystems. Shifts in the overall fungal community composition in response to higher temperatures may alter fungal-driven processes with potential feedbacks on ecosystem N cycling and C storage at the alpine treeline.
- Subjects :
- 0106 biological sciences
Physiology
Nitrogen
Biological Availability
Larix
Plant Science
Biology
010603 evolutionary biology
01 natural sciences
Plant Roots
Soil
Abundance (ecology)
Mycorrhizae
1110 Plant Science
Sporocarp (fungi)
Ecosystem
910 Geography & travel
Soil Microbiology
Rhizosphere
Ecology
Altitude
Global warming
Fungi
Temperature
04 agricultural and veterinary sciences
1314 Physiology
Carbon Dioxide
Pinus
Ectomycorrhiza
10122 Institute of Geography
Soil water
040103 agronomy & agriculture
0401 agriculture, forestry, and fisheries
Cycling
Switzerland
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....8db04f612d2ee68f243bc2082a695bb4