DOI: 10.1111/gcb.12716
论文题名: Summer temperature increase has distinct effects on the ectomycorrhizal fungal communities of moist tussock and dry tundra in Arctic Alaska
作者: Morgado L.N. ; Semenova T.A. ; Welker J.M. ; Walker M.D. ; Smets E. ; Geml J.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2015
卷: 21, 期: 2 起始页码: 959
结束页码: 972
语种: 英语
英文关键词: Arctic ecology
; Climate changes
; Fungal ecology
; Fungi
; ITEX
; Long-term ecological research
; Toolik Lake
Scopus关键词: air temperature
; arctic environment
; climate change
; community composition
; DNA
; ectomycorrhiza
; fungus
; species richness
; summer
; tundra
; Alaska
; Arctic
; United States
; Cortinarius
; Fungi
; Otus
; Tomentella
; fungal DNA
; Arctic
; biodiversity
; DNA sequence
; genetics
; greenhouse effect
; isolation and purification
; microbiology
; molecular genetics
; mycorrhiza
; physiology
; polymerase chain reaction
; season
; temperature
; tundra
; United States
; Alaska
; Arctic Regions
; Biodiversity
; DNA, Fungal
; Global Warming
; Molecular Sequence Data
; Mycorrhizae
; Polymerase Chain Reaction
; Seasons
; Sequence Analysis, DNA
; Soil Microbiology
; Temperature
; Tundra
英文摘要: Arctic regions are experiencing the greatest rates of climate warming on the planet and marked changes have already been observed in terrestrial arctic ecosystems. While most studies have focused on the effects of warming on arctic vegetation and nutrient cycling, little is known about how belowground communities, such as fungi root-associated, respond to warming. Here, we investigate how long-term summer warming affects ectomycorrhizal (ECM) fungal communities. We used Ion Torrent sequencing of the rDNA internal transcribed spacer 2 (ITS2) region to compare ECM fungal communities in plots with and without long-term experimental warming in both dry and moist tussock tundra. Cortinarius was the most OTU-rich genus in the moist tundra, while the most diverse genus in the dry tundra was Tomentella. On the diversity level, in the moist tundra we found significant differences in community composition, and a sharp decrease in the richness of ECM fungi due to warming. On the functional level, our results indicate that warming induces shifts in the extramatrical properties of the communities, where the species with medium-distance exploration type seem to be favored with potential implications for the mobilization of different nutrient pools in the soil. In the dry tundra, neither community richness nor community composition was significantly altered by warming, similar to what had been observed in ECM host plants. There was, however, a marginally significant increase in OTUs identified as ECM fungi with the medium-distance exploration type in the warmed plots. Linking our findings of decreasing richness with previous results of increasing ECM fungal biomass suggests that certain ECM species are favored by warming and may become more abundant, while many other species may go locally extinct due to direct or indirect effects of warming. Such compositional shifts in the community might affect nutrient cycling and soil organic C storage. © 2014 The Authors. Global Change Biology Published by John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61850
Appears in Collections: 影响、适应和脆弱性
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作者单位: Naturalis Biodiversity Center, P.O. Box 9517, Leiden, RA, Netherlands; Faculty of Science, Leiden University, P.O. Box 9502, Leiden, RA, Netherlands; Department of Biological Sciences, University of Alaska Anchorage, Anchorage, United States; HOMER Energy, 1790 30th St, Suite 100, Boulder, CO, United States; Plant Conservation and Population Biology, KU Leuven, Kasteelpark Arenberg 31, Box 2437, Leuven, Belgium
Recommended Citation:
Morgado L.N.,Semenova T.A.,Welker J.M.,et al. Summer temperature increase has distinct effects on the ectomycorrhizal fungal communities of moist tussock and dry tundra in Arctic Alaska[J]. Global Change Biology,2015-01-01,21(2)