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Nitrogen deposition weakens plant-microbe interactions in grassland ecosystems

文献类型：期刊论文

作者Wei, Cunzheng4; Yu, Qiang5,6; Bai, Edith5; Lu, Xiaotao5; Li, Qi5; Xia, Jianyang1,2; Kardol, Paul1,2; Liang, Wenju5; Wang, Zhengwen5; Han, Xingguo5
刊名GLOBAL CHANGE BIOLOGY
出版日期2013
卷号19期号:12页码:3688-3697
关键词aboveground-belowground linkages compensatory effects microbial carbon limitation N saturation resource stoichiometry structural equation modeling
ISSN号1354-1013
DOI10.1111/gcb.12348
文献子类Article
英文摘要Soil carbon (C) and nitrogen (N) stoichiometry is a main driver of ecosystem functioning. Global N enrichment has greatly changed soil C:N ratios, but how altered resource stoichiometry influences the complexity of direct and indirect interactions among plants, soils, and microbial communities has rarely been explored. Here, we investigated the responses of the plant-soil-microbe system to multi-level N additions and the role of dissolved organic carbon (DOC) and inorganic N stoichiometry in regulating microbial biomass in semiarid grassland in northern China. We documented a significant positive correlation between DOC and inorganic N across the N addition gradient, which contradicts the negative nonlinear correlation between nitrate accrual and DOC availability commonly observed in natural ecosystems. Using hierarchical structural equation modeling, we found that soil acidification resulting from N addition, rather than changes in the plant community, was most closely related to shifts in soil microbial community composition and decline of microbial respiration. These findings indicate a down-regulating effect of high N availability on plant-microbe interactions. That is, with the limiting factor for microbial biomass shifting from resource stoichiometry to soil acidity, N enrichment weakens the bottom-up control of soil microorganisms by plant-derived C sources. These results highlight the importance of integratively studying the plant-soil-microbe system in improving our understanding of ecosystem functioning under conditions of global N enrichment.
学科主题Biodiversity Conservation ; Ecology ; Environmental Sciences
出版地HOBOKEN
电子版国际标准刊号1365-2486
WOS关键词GLOBAL CHANGE ; MYCORRHIZAL FUNGI ; SOIL ; ACIDIFICATION ; BIODIVERSITY ; BIOMASS ; PH ; METAANALYSIS ; CONTINGENCY ; COMMUNITIES
WOS研究方向Science Citation Index Expanded (SCI-EXPANDED)
语种英语
WOS记录号WOS:000326836000012
出版者WILEY
资助机构National Natural Science Foundation of China(National Natural Science Foundation of China (NSFC)) ; Chinese Academy of Sciences(Chinese Academy of Sciences)
源URL[http://ir.ibcas.ac.cn/handle/2S10CLM1/28023]  
专题植被与环境变化国家重点实验室
作者单位1.Colorado State Univ, Grad Degree Program Ecol, Dept Biol, Ft Collins, CO 80523 USA
2.Univ Oklahoma, Dept Bot & Microbiol, Norman, OK 73019 USA
3.Swedish Univ Agr Sci, Dept Forest Ecol & Management, S-90183 Umea, Sweden
4.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
6.Chinese Acad Sci, Inst Appl Ecol, State Key Lab Forest & Soil Ecol, Shenyang 110164, Peoples R China
推荐引用方式
GB/T 7714		 Wei, Cunzheng,Yu, Qiang,Bai, Edith,et al. Nitrogen deposition weakens plant-microbe interactions in grassland ecosystems[J]. GLOBAL CHANGE BIOLOGY,2013,19(12):3688-3697.
APA Wei, Cunzheng.,Yu, Qiang.,Bai, Edith.,Lu, Xiaotao.,Li, Qi.,...&Han, Xingguo.(2013).Nitrogen deposition weakens plant-microbe interactions in grassland ecosystems.GLOBAL CHANGE BIOLOGY,19(12),3688-3697.
MLA Wei, Cunzheng,et al."Nitrogen deposition weakens plant-microbe interactions in grassland ecosystems".GLOBAL CHANGE BIOLOGY 19.12(2013):3688-3697.

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来源：植物研究所

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