Modification of the composition of dissolved nitrogen forms, nitrogen transformation processes, and diversity of bacterial communities by freeze-thaw events in temperate soils

doi:10.1016/j.pedobi.2018.08.004

	Modification of the composition of dissolved nitrogen forms, nitrogen transformation processes, and diversity of bacterial communities by freeze-thaw events in temperate soils
	Jiang, Nan 1; Juan, Yinghua 2; Tian, Lulu 3; Chen, Xiaodong 1; Sun, Wentao 2; Chen, Lijun 1
刊名	PEDOBIOLOGIA
	2018-11-01
卷号	71 页码:41-49
关键词	Dissolved nitrogen Nitrogen transformation processes Bacterial community Freeze-thaw amplitudes Correlations Procrustean residuals
ISSN号	0031-4056
DOI	10.1016/j.pedobi.2018.08.004
英文摘要	Freeze-thaw (FT) events can influence the soil nitrogen (N) availability, although their effect on the diversity of bacterial communities during these processes remains uncertain. To test our hypothesis that close relationships exist between dissolved N pools (including NO3-, NH4+, NO3- + NH4+, and dissolved organic N [DON]), N transformation processes (including N mineralization, N immobilization, nitrification, and denitrification), and bacterial communities in response to FT events, we varied the temperature amplitude of these events by using freezing temperatures of -15 degrees C, - 9 degrees C, and - 3 degrees C and thawing temperatures of 2 degrees C and 5 degrees C in microcosms incubated in a temperate agricultural soil. All the pools of total dissolved inorganic N (DIN: i.e., NO3- + NH4+) decreased in concentration as the amplitude of freezing and thawing temperatures increased, whereas the opposite trend was observed for dissolved organic N (DON). Changes in the concentration of all the dissolved N forms examined were highly linearly correlated with N transformation processes. Partial correlation networks highlighted the transformation between the dissolved N forms during N mineralization and the direct immobilization of either NH4+ or DON by microorganisms in response to FT events. In addition, the total dissolved N content was primarily driven by the DON pool, thus suggesting a primary role for protease activity in response to FT. The Mental and Procrustean tests indicated that the N pools examined and the transformation processes were significantly correlated with bacterial community diversity. This linkage could be significantly weakened by warmer freezing temperatures, in which the orders Cytophagales and Sphingobacteriales may play an important role.
资助项目	Special Fund for Agro-scientific Research in the Public Interest[201503118-08] ; National Natural Science Foundation of China[41301253] ; National Natural Science Foundation of China[41471217] ; Cultivation Plan for Youth Agricultural Science and Technology Innovative Talents of Liaoning Province[2014018]
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
语种	英语
出版者	ELSEVIER GMBH, URBAN & FISCHER VERLAG
WOS记录号	WOS:000449825600005
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/123723]
专题	中国科学院沈阳应用生态研究所
通讯作者	Sun, Wentao; Chen, Lijun
作者单位	1.Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Liaoning, Peoples R China 2.Liaoning Acad Agr Sci, Inst Plant Nutr & Environm Resources, Shenyang 110161, Liaoning, Peoples R China 3.Shenyang Agr Univ, Dept Soil & Environm, Shenyang 110866, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Nan,Juan, Yinghua,Tian, Lulu,et al. Modification of the composition of dissolved nitrogen forms, nitrogen transformation processes, and diversity of bacterial communities by freeze-thaw events in temperate soils[J]. PEDOBIOLOGIA,2018,71:41-49.
APA	Jiang, Nan,Juan, Yinghua,Tian, Lulu,Chen, Xiaodong,Sun, Wentao,&Chen, Lijun.(2018).Modification of the composition of dissolved nitrogen forms, nitrogen transformation processes, and diversity of bacterial communities by freeze-thaw events in temperate soils.PEDOBIOLOGIA,71,41-49.
MLA	Jiang, Nan,et al."Modification of the composition of dissolved nitrogen forms, nitrogen transformation processes, and diversity of bacterial communities by freeze-thaw events in temperate soils".PEDOBIOLOGIA 71(2018):41-49.