干旱区生态环境知识资源中心(Arid): Characteristics of iron cycle and its driving mechanism during the development of biological soil crusts associated with desert revegetation

Arid

DOI	10.1016/j.soilbio.2021.108487
	Characteristics of iron cycle and its driving mechanism during the development of biological soil crusts associated with desert revegetation
	Liu, Yubing; Wang, Yansong; Wang, Zengru; Gao, Tianpeng
通讯作者	Liu, YB (corresponding author), 768 West Jiayuguan Rd, Lanzhou 730020, Peoples R China.
来源期刊	SOIL BIOLOGY & BIOCHEMISTRY
ISSN	0038-0717
EISSN	1879-3428
出版年	2022
卷号	164
英文摘要	Iron (Fe) is an essential element for almost all living organisms. In addition, microbial Fe cycling drives the biogeochemical cycles of other elements, although little is known about characteristics of Fe cycling and its driving mechanism in desert ecosystems. Here, we investigated the key microbial functional genes involved in Fe (II) oxidation and Fe(III) reduction and the associated factors affecting the soil during the development of biological soil crusts (BSCs), which are among the most important landscapes in desert ecosystems. We also analyzed the relationships among the genes involved in Fe, carbon (C), and nitrogen (N) cycling. The available Fe content and diversity of genes associated with microbial Fe cycling increased after 61 years of BSC development. Our results suggested that Fe(II) oxidation in BSCs is mainly driven by the iro gene from microaerophilic Fe oxidizing microorganisms (FeOMs), whereas Fe(III) reduction is driven mainly by c-type cytochromes through regulation by the OmcS gene. The presence of both genes significantly correlated with that of genes involved in labile organic C degradation, denitrification, and N reduction. Fungal abundance, soil nutrient content (mainly total N), and the Fe-manganese (Mn) oxide-bound fraction (RED-Fe) were the main soil factors affecting the gene profile associated with microbial Fe cycling in BSCs (explaining 74.8% of the variation). These results indicated that the main Fe cycling process in desert ecosystems can adapt to the local environment. Furthermore, the interaction between Fe and the C or N cycles, as well as the synergistic effects of soil quality improvement, actively promotes effective and dynamic Fe cycling in BSCs.
英文关键词	Biogeochemical cycle Fe(II) oxidation Fe(III) reduction Iron chemical form Microbial functional genes
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000720850600003
WOS关键词	EXTRACELLULAR ELECTRON-TRANSFER ; FUNCTIONAL GENE STRUCTURE ; MICROBIAL COMMUNITY ; REDUCTION ; OXIDATION ; BACTERIA ; METAL ; MICROORGANISMS ; PATHWAYS ; KINETICS
WOS类目	Soil Science
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/374413
作者单位	[Liu, Yubing; Wang, Zengru] Lanzhou Univ, Coll Pastoral Agr Sci & Technol,Minist Educ, Engn Res Ctr Grassland Ind,Minist Agr & Rural Aff, State Key Lab Grassland Agroecosyst,Key Lab Grass, Lanzhou 730020, Gansu, Peoples R China; [Wang, Yansong] Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China; [Gao, Tianpeng] Lanzhou City Univ, Engn Res Ctr Min Pollut Treatment & Ecol Restorat, Lanzhou 730070, Peoples R China
推荐引用方式 GB/T 7714	Liu, Yubing,Wang, Yansong,Wang, Zengru,et al. Characteristics of iron cycle and its driving mechanism during the development of biological soil crusts associated with desert revegetation[J],2022,164.
APA	Liu, Yubing,Wang, Yansong,Wang, Zengru,&Gao, Tianpeng.(2022).Characteristics of iron cycle and its driving mechanism during the development of biological soil crusts associated with desert revegetation.SOIL BIOLOGY & BIOCHEMISTRY,164.
MLA	Liu, Yubing,et al."Characteristics of iron cycle and its driving mechanism during the development of biological soil crusts associated with desert revegetation".SOIL BIOLOGY & BIOCHEMISTRY 164(2022).