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

被引:347
作者
Chen, Qing-Lin [1 ,2 ]
Ding, Jing [5 ]
Zhu, Dong [1 ,3 ]
Hu, Hang-Wei [2 ]
Delgado-Baquerizo, Manuel [6 ]
Ma, Yi-Bing [4 ]
He, Ji-Zheng [2 ]
Zhu, Yong-Guan [1 ,3 ]
机构
[1] Chinese Acad Sci, Inst Urban Environm, Key Lab Urban Environm & Hlth, 1799 Jimei Rd, Xiamen 361021, Peoples R China
[2] Univ Melbourne, Fac Vet & Agr Sci, Parkville, Vic 3010, Australia
[3] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China
[4] Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Minist Agr, Key Lab Plant Nutr & Nutrient Cycling, Beijing 100081, Peoples R China
[5] Yantai Univ, Sch Environm & Mat Engn, 30 Qingquan Rd, Yantai 264005, Peoples R China
[6] Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA
基金
国家重点研发计划; 中国国家自然科学基金;
关键词
Biological processes; Microbial diversity; Rare taxa; Ecosystem functions; Biogeochemical cycling; COMMUNITY COMPOSITION; BIODIVERSITY; RESISTANCE; DIVERSITY; REDUNDANCY; RESILIENCE; CHALLENGES; RICHNESS; SEARCH; FOOD;
D O I
10.1016/j.soilbio.2019.107686
中图分类号
S15 [土壤学];
学科分类号
0903 ; 090301 ;
摘要
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.
引用
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页数:8
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