Rare microbial taxa as the major drivers of ecosystem multifunctionality in long-term fertilized soils

Soil microbial communities play an essential role in driving multiple functions (i.e., multifunctionality) that are central to the global biogeochemical cycles. Long-term fertilization has been reported to reduce the soil microbial diversity, however, the impact of fertilization on multifunctionalit...

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Veröffentlicht in:Soil biology & biochemistry Jg. 141; H. C; S. 107686
Hauptverfasser: Chen, Qing-Lin, Ding, Jing, Zhu, Dong, Hu, Hang-Wei, Delgado-Baquerizo, Manuel, Ma, Yi-Bing, He, Ji-Zheng, Zhu, Yong-Guan
Format: Journal Article
Sprache:Englisch
Veröffentlicht: United Kingdom Elsevier Ltd 01.02.2020
Elsevier
Schlagworte:
algorithms
Ascomycota
biodiversity
biogeochemical cycles
Biogeochemical cycling
Biological processes
Cyanobacteria
ecological function
Ecosystem functions
ecosystems
fertilizer application
fungi
genes
Glomeromycota
microbial communities
Microbial diversity
mineral fertilizers
organic fertilizers
Proteobacteria
quantitative polymerase chain reaction
Rare taxa
regression analysis
soil
soil microorganisms
Microbial diversity
Rare taxa
Biogeochemical cycling
Biological processes
Ecosystem functions
ISSN:0038-0717, 1879-3428
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Zusammenfassung:Soil microbial communities play an essential role in driving multiple functions (i.e., multifunctionality) that are central to the global biogeochemical cycles. Long-term fertilization has been reported to reduce the soil microbial diversity, however, the impact of fertilization on multifunctionality and its relationship with soil microbial diversity remains poorly understood. We used amplicon sequencing and high-throughput quantitative-PCR array to characterize the microbial community compositions and 70 functional genes in a long-term experimental field station with multiple inorganic and organic fertilization treatments. Compared with inorganic fertilization, the application of organic fertilizer improved the soil multifunctionality, which positively correlated with the both bacterial and fungal diversity. Random Forest regression analysis indicated that rare microbial taxa (e.g. Cyanobacteria and Glomeromycota) rather than the dominant taxa (e.g. Proteobacteria and Ascomycota) were the major drivers of multifunctionality, suggesting that rare taxa had an over-proportional role in biological processes. Therefore, preserving the diversity of soil microbial communities especially the rare microbial taxa could be crucial to the sustainable provision of ecosystem functions in the future. [Display omitted] •Inorganic fertilization decreased soil multifunctionality.•Organic fertilization increased microbial diversity and multifunctionality.•Rare microbial taxa had an over-proportional role in multifunctionality.
Bibliographie:ObjectType-Article-1
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USDOE Office of Electricity (OE), Advanced Grid Research & Development. Power Systems Engineering Research
2017YFE0107300; 2016YFD0800205
ISSN:0038-0717
1879-3428
DOI:10.1016/j.soilbio.2019.107686