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Effects of nitrogen enrichment on belowground communities in grassland: Relative role of soil nitrogen availability vs. soil acidification

文献类型：期刊论文

作者Chen, Dima2; Lan, Zhichun; Hu, Shuijin2; Bai, Yongfei
刊名SOIL BIOLOGY & BIOCHEMISTRY
出版日期2015
卷号89页码:99-108
关键词Plant-soil interactions Belowground food web Trophic levels Plant functional groups Soil microbial communities Soil nematode communities Belowground communities Base mineral cations
ISSN号0038-0717
DOI10.1016/j.soilbio.2015.06.028
文献子类Article
英文摘要Terrestrial ecosystems worldwide are receiving increasing amounts of biologically reactive nitrogen (N) as a consequence of anthropogenic activities. This intended or unintended fertilization can have a wide range of impacts on the above- and belowground communities. An increase in high N availability has been assumed to be a major mechanism enhancing the abundance of above- and belowground communities. In addition to increasing available N, however, N enrichment causes soil acidification, which may negatively affect above- and belowground communities. The relative importance of increased N availability vs. increased soil acidity for above- and belowground communities in natural ecosystems experiencing N enrichment is unclear. In a 12-year N enrichment experiment in a semi-arid grassland, N enrichment substantially increased both above- and belowground plant biomass mainly via the N availability-induced increase in biomass of perennial rhizome grasses. N enrichment also dramatically suppressed bacterial, fungal, and actinobacteria biomass mainly via the soil acidification pathway (acidification increased concentrations of H+ ions and Al3+ and decreased concentrations of mineral cations). In addition, N enrichment also suppressed bacterial-, fungal-feeding, and omnivorous + carnivorous nematodes mainly via the soil acidification pathway (acidification reduced nematode food resources and reduced concentrations of mineral cations). The positive effects resulting from the increase in belowground carbon allocation (via increase in quantity and quality of plant production) on belowground communities were outweighed by the negative effects resulting from soil acidification, indicating that N enrichment weakens the linkages between aboveground and belowground components of grassland ecosystems. Our results suggest that N enrichment-induced soil acidification should be included in models that predict biota communities and linkages to carbon and nitrogen cycling in terrestrial ecosystems under future scenarios of N deposition. (C) 2015 Elsevier Ltd. All rights reserved.
学科主题Soil Science
出版地OXFORD
WOS关键词BACTERIAL COMMUNITIES ; MICROBIAL COMMUNITIES ; PLANT DIVERSITY ; ELEVATED CO2 ; DEPOSITION ; FOREST ; ACID ; PH ; FERTILIZATION ; PRODUCTIVITY
WOS研究方向Science Citation Index Expanded (SCI-EXPANDED)
语种英语
WOS记录号WOS:000361159800010
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构Chinese National Key Development Program for Basic Research [2015CB954201] ; Natural Science Foundation of China [1100335, 31030013, 31320103916]
源URL[http://ir.ibcas.ac.cn/handle/2S10CLM1/25924]  
专题植被与环境变化国家重点实验室
作者单位1.N Carolina State Univ, Dept Plant Pathol, Raleigh, NC 27695 USA
2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
推荐引用方式
GB/T 7714		 Chen, Dima,Lan, Zhichun,Hu, Shuijin,et al. Effects of nitrogen enrichment on belowground communities in grassland: Relative role of soil nitrogen availability vs. soil acidification[J]. SOIL BIOLOGY & BIOCHEMISTRY,2015,89:99-108.
APA Chen, Dima,Lan, Zhichun,Hu, Shuijin,&Bai, Yongfei.(2015).Effects of nitrogen enrichment on belowground communities in grassland: Relative role of soil nitrogen availability vs. soil acidification.SOIL BIOLOGY & BIOCHEMISTRY,89,99-108.
MLA Chen, Dima,et al."Effects of nitrogen enrichment on belowground communities in grassland: Relative role of soil nitrogen availability vs. soil acidification".SOIL BIOLOGY & BIOCHEMISTRY 89(2015):99-108.

入库方式： OAI收割

来源：植物研究所

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