Broad-scale distribution of diazotrophic communities is driven more by aridity index and temperature than by soil properties across various forests

doi:10.1111/geb.13178

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	Broad-scale distribution of diazotrophic communities is driven more by aridity index and temperature than by soil properties across various forests
	Zhao Wenqiang 1,2; Kou Yongping 1,2; Wang Xiaohu 1,2; Wu Yanhong 3; Bing Haijian 3; Liu Qing 1,2
刊名	GLOBAL ECOLOGY AND BIOGEOGRAPHY
	2020
页码	DOI: 10.1111/geb.13178
关键词	biogeography community structure environmental variable forest type multi-nutrients nifHdiversity soil diazotrophs
ISSN号	1466-822X
DOI	10.1111/geb.13178
产权排序	3
文献子类	Article; Early Access
英文摘要	Aim Many studies have found that diazotrophic distribution is mainly determined by soil properties from field to regional scales. However, we lack strong evidence for the relative importance of different drivers controlling broad-scale biogeography of forest diazotrophs, especially for soil multi-nutrients. Location China's forests. Time period 2012-2013. Major taxa studied Diazotrophic communities. Methods We investigated the distribution of soil diazotrophic communities from 146 sites along a 3,900-km south-north transect by sequencing N-fixingnifHgene amplicons. The relative contributions of environmental variables were assessed using a combination of stepwise multiple regression, variation partitioning analysis, multiple regression on distance matrices and partial least squares path modelling. Results Overall, aridity index and temperature were the predominant parameters governing diazotrophic community diversity and structure, mainly through their indirect effects on soil pH, nutrient contents and plant productivity. Although soil multi-nutrients (Ca, Mg, Fe, Mn, Na, Cu and Zn) were included in the statistical analysis, they still exhibited lower impacts on diazotrophic communities than climate. Intriguingly, the microelement Mo could not explain the diazotrophic community patterns, despite its significance in nitrogenase enzymes. This unexpected phenomenon was attributed to the relatively high Mo supply in our work. Moreover, the distinct responses of diazotroph taxa to climatic factors and large heterogeneity of diazotrophic diversity among forests in different climatic zones further support the dominant role of climatic variation. These results indicate the presence of differentiated climatic niches for diazotrophs, such as warm-adaptedBradyrhizobiumand cool-adaptedAzospirillum. Main conclusions Our findings suggest for the first time that unlike prior studies, the key roles of soil nutrient limitation (even for Mo) and pH-dependent mechanisms in small-scale diazotrophic communities can be surpassed by large-scale climatic gradients. Future changes in drought severity and temperature might greatly shape diazotrophic distribution and its potential function in forest N(2)fixation.
电子版国际标准刊号	1466-8238
语种	英语
WOS记录号	WOS:000569157700001
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/46289]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
通讯作者	Liu Qing
作者单位	1.Chinese Acad Sci, CAS Key Lab Mt Ecol Restorat & Bioresource Utiliz, Chengdu Inst Biol, Chengdu 610041, Peoples R China; 2.Chinese Acad Sci, Ecol Restorat Biodivers Conservat Key Lab Sichuan, Chengdu Inst Biol, Chengdu 610041, Peoples R China; 3.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu, Peoples R China
推荐引用方式 GB/T 7714	Zhao Wenqiang,Kou Yongping,Wang Xiaohu,et al. Broad-scale distribution of diazotrophic communities is driven more by aridity index and temperature than by soil properties across various forests[J]. GLOBAL ECOLOGY AND BIOGEOGRAPHY,2020:DOI: 10.1111/geb.13178.
APA	Zhao Wenqiang,Kou Yongping,Wang Xiaohu,Wu Yanhong,Bing Haijian,&Liu Qing.(2020).Broad-scale distribution of diazotrophic communities is driven more by aridity index and temperature than by soil properties across various forests.GLOBAL ECOLOGY AND BIOGEOGRAPHY,DOI: 10.1111/geb.13178.
MLA	Zhao Wenqiang,et al."Broad-scale distribution of diazotrophic communities is driven more by aridity index and temperature than by soil properties across various forests".GLOBAL ECOLOGY AND BIOGEOGRAPHY (2020):DOI: 10.1111/geb.13178.