Biological controls over the abundances of terrestrial ammonia oxidizers

被引:47
作者
Xiao, Rui [1 ]
Qiu, Yunpeng [2 ]
Tao, Jinjin [1 ]
Zhang, Xuelin [2 ]
Chen, Huaihai [3 ]
Reberg-Horton, S. Chris [3 ]
Shi, Wei [3 ]
Shew, H. David [2 ]
Zhang, Yi [1 ]
Hu, Shuijin [1 ,2 ]
机构
[1] Nanjing Agr Univ, Coll Resources & Environm Sci, Nanjing 210095, Jiangsu, Peoples R China
[2] North Carolina State Univ, Dept Entomol & Plant Pathol, Raleigh, NC 27695 USA
[3] North Carolina State Univ, Dept Crop & Soil Sci, Raleigh, NC USA
来源
GLOBAL ECOLOGY AND BIOGEOGRAPHY | 2020年 / 29卷 / 02期
基金
国家重点研发计划; 中国国家自然科学基金;
关键词
ammonia-oxidizing archaea; ammonia-oxidizing bacteria; competition; meta-analysis; nitrification; soil C; N ratio; MICROBIAL COMMUNITY STRUCTURE; ARBUSCULAR MYCORRHIZAL FUNGI; ORGANIC-CARBON; NITRIFICATION INHIBITION; RESIDUE DECOMPOSITION; NICHE SPECIALIZATION; SOIL-PH; ARCHAEA; BACTERIA; OXIDATION;
D O I
10.1111/geb.13030
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Aim Ammonia-oxidizing archaea (AOA) and bacteria (AOB) are the primary agents for nitrification, converting ammonia (NH4+) into nitrate (NO3-) and modulating plant nitrogen (N) utilization and terrestrial N retention. However, there is still lack of a unifying framework describing the patterns of global AOA and AOB distribution. In particular, biotic interactions are rarely integrated into any of the conceptual models. Location World-wide. Time period 2005-2016. Major taxa studied Ammonia-oxidizing archaea and ammonia-oxidizing bacteria. Methods A meta-analysis and synthesis were conducted to obtain a general picture of global AOA and AOB distribution and identify the primary driving factors. A microcosm experiment was then conducted to assess effects of relative carbon to nitrogen availability for heterotrophic microbes on AOA and AOB in two distinct soils. A mesocosm experiment was further carried out to characterize the effects of plant roots and their arbuscular mycorrhizal fungi (AMF) on AOA and AOB abundances using hyphae- or root-ingrowth techniques. Results Our meta-analysis showed that soil carbon to nitrogen (C/N) ratios explained the most variance in AOA and AOB abundances, although soil pH had a significant effect. Experimental results demonstrated that high cellulose and mineral N inputs increased total microbial biomass and microbial activities, but inhibited AOA and AOB, suggesting microbial inhibition of AOA and AOB. Also, AMF and roots suppressed AOA and AOB, respectively. Main conclusions Our study provides convincing evidence illustrating that relative carbon to nitrogen availability can predominantly affect the abundances of AOA and AOB. Our experimental results further validate that biotic competition among plants, heterotrophic microbes and ammonia oxidizers for substrate N is the predominant control upon AOA and AOB abundances. Together, these findings provide new insights into the role of abiotic and biotic factors in modulating terrestrial AOA and AOB abundances and their potential applications for management of nitrification in an increasing reactive N world.
引用
收藏
页码:384 / 399
页数:16
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