干旱区生态环境知识资源中心(Arid): The composition and functional roles of soil autotrophic microorganisms in vegetation restoration of degraded karst forest

Arid

DOI	10.1007/s10342-024-01723-8
	The composition and functional roles of soil autotrophic microorganisms in vegetation restoration of degraded karst forest
	Dai, Yu; Zang, Lipeng; Zhang, Guangqi; Liu, Qingfu; Sui, Mingzhen; He, Yuejun; Wang, Shasha; Zhou, Chunjie; Chen, Danmei
通讯作者	Chen, DM
来源期刊	EUROPEAN JOURNAL OF FOREST RESEARCH
ISSN	1612-4669
EISSN	1612-4677
出版年	2024
英文摘要	Autotrophic microorganisms play a significant role in atmospheric CO2 fixation and soil organic carbon (SOC) sequestration in diverse ecosystems, but little is known about their role in karst forests. To investigate the composition and changes of autotrophic microbial communities during degraded karst forest restoration, the related functional genes and microorganisms from three restoration stages (shrubbery, TG; secondary forest, SG; old-growth forest, OG) were examined through metagenomic sequencing. Their underlying drivers and contributions to SOC were investigated using structural equation modeling (SEM) and regression analysis. Karst forest restoration resulted in the synchronous recovery of above-ground plants and soil conditions. When TG was restored to OG, soil autotrophic CO2 fixation microbes changed significantly, indicated by an increase in microbial functional strength and diversity. Among the six examined functional pathways, the rTCA cycle contributed the most (0.074-0.082%), while the WL pathway contributed the least (0.008-0.010%) to CO2 fixation functions. Except the Calvin cycle, genes involved in the other five pathways showed an increase with karst forest restoration. SEMs further revealed that soil pH and available nitrogen directly drive the increase in microbial autotrophic CO2 fixation functions. In karst forests, autotrophic CO2-fixing microorganisms play a crucial role in enhancing SOC, particularly through the DC/4-HB cycle, 3-HP/4-HB cycle, and WL pathway. Soil microbial communities involved in autotrophic CO2 fixation were predominantly attributed to Proteobacteria (43.02-32.42%) and Actinobacteria (18.83-30.89%), although their contributions varied across different stages. These results highlight the significant contribution of autotrophic microorganisms to the SOC of karst forests and enhance our understanding of the microbial mechanisms behind soil C sequestration.
英文关键词	Natural restoration Karst forest Soil organic carbon Autotrophic microorganisms Functional genes
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001276968900001
WOS关键词	CARBON-FIXATION ; ORGANIC-MATTER ; ROCKY DESERTIFICATION ; BACTERIAL DIVERSITY ; ATMOSPHERIC CO2 ; LOESS PLATEAU ; COMMUNITY ; ABUNDANCE ; CHRONOSEQUENCE ; SEQUESTRATION
WOS类目	Forestry
WOS研究方向	Forestry
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/403701
推荐引用方式 GB/T 7714	Dai, Yu,Zang, Lipeng,Zhang, Guangqi,et al. The composition and functional roles of soil autotrophic microorganisms in vegetation restoration of degraded karst forest[J],2024.
APA	Dai, Yu.,Zang, Lipeng.,Zhang, Guangqi.,Liu, Qingfu.,Sui, Mingzhen.,...&Chen, Danmei.(2024).The composition and functional roles of soil autotrophic microorganisms in vegetation restoration of degraded karst forest.EUROPEAN JOURNAL OF FOREST RESEARCH.
MLA	Dai, Yu,et al."The composition and functional roles of soil autotrophic microorganisms in vegetation restoration of degraded karst forest".EUROPEAN JOURNAL OF FOREST RESEARCH (2024).