DOI: 10.1111/gcb.12609
论文题名: Elevated atmospheric CO2 stimulates soil fungal diversity through increased fine root production in a semiarid shrubland ecosystem
作者: Lipson D.A. ; Kuske C.R. ; Gallegos-Graves L.V. ; Oechel W.C.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2014
卷: 20, 期: 8 起始页码: 2555
结束页码: 2565
语种: 英语
英文关键词: 18S rRNA qPCR
; Adenostoma fasciculatum
; Chaparral
; Large subunit rRNA (28S rRNA or LSU rRNA)
; Mediterranean-type ecosystem
; Microbial community
Scopus关键词: carbon dioxide
; carbon dioxide enrichment
; chaparral
; climate change
; community composition
; community response
; fungus
; microbial community
; nutrient cycling
; semiarid region
; soil biota
; soil carbon
; soil microorganism
; species diversity
; species evenness
; species richness
; California
; United States
; carbon dioxide
; fungal DNA
; RNA 18S
; atmosphere
; biodiversity
; classification
; DNA sequence
; ecosystem
; fungus
; genetics
; growth, development and aging
; isolation and purification
; microbiology
; plant root
; polymerase chain reaction
; United States
; Atmosphere
; Biodiversity
; California
; Carbon Dioxide
; DNA, Fungal
; Ecosystem
; Fungi
; Plant Roots
; Polymerase Chain Reaction
; RNA, Ribosomal, 18S
; Sequence Analysis, DNA
; Soil Microbiology
英文摘要: Soil fungal communities are likely to be central in mediating microbial feedbacks to climate change through their effects on soil carbon (C) storage, nutrient cycling, and plant health. Plants often produce increased fine root biomass in response to elevated atmospheric carbon dioxide (CO2), but the responses of soil microbial communities are variable and uncertain, particularly in terms of species diversity. In this study, we describe the responses of the soil fungal community to free air CO2 enrichment (FACE) in a semiarid chaparral shrubland in Southern California (dominated by Adenomstoma fasciculatum) using large subunit rRNA gene sequencing. Community composition varied greatly over the landscape and responses to FACE were subtle, involving a few specific groups. Increased frequency of Sordariomycetes and Leotiomycetes, the latter including the Helotiales, a group that includes many dark septate endophytes known to associate positively with roots, was observed in the FACE plots. Fungal diversity, both in terms of richness and evenness, increased consistently in the FACE treatment, and was relatively high compared to other studies that used similar methods. Increases in diversity were observed across multiple phylogenetic levels, from genus to class, and were distributed broadly across fungal lineages. Diversity was also higher in samples collected close to (5 cm) plants compared to samples in canopy gaps (30 cm away from plants). Fungal biomass correlated well with soil organic matter (SOM) content, but patterns of diversity were correlated with fine root production rather than SOM. We conclude that the fungal community in this ecosystem is tightly linked to plant fine root production, and that future changes in the fungal community in response to elevated CO2 and other climatic changes will be primarily driven by changes in plant belowground allocation. Potential feedbacks mediated by soil fungi, such as soil C sequestration, nutrient cycling, and pathogenesis, are discussed. © 2014 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62067
Appears in Collections: 影响、适应和脆弱性
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作者单位: San Diego State University, San Diego, CA, 92182, United States; Los Alamos National Laboratory, Los Alamos, NM, 87545, United States
Recommended Citation:
Lipson D.A.,Kuske C.R.,Gallegos-Graves L.V.,et al. Elevated atmospheric CO2 stimulates soil fungal diversity through increased fine root production in a semiarid shrubland ecosystem[J]. Global Change Biology,2014-01-01,20(8)