干旱区生态环境知识资源中心(Arid): Kinetics and pathways of sub-lithic microbial community (hypolithon) development

Arid

DOI	10.1111/1758-2229.13290
	Kinetics and pathways of sub-lithic microbial community (hypolithon) development
	Bosch, Jason; Lebre, Pedro H.; Marais, Eugene; Maggs-Kolling, Gillian; Cowan, Don A.
通讯作者	Cowan, DA
来源期刊	ENVIRONMENTAL MICROBIOLOGY REPORTS
ISSN	1758-2229
出版年	2024
卷号	16 期号:3
英文摘要	Type I hypolithons are microbial communities dominated by Cyanobacteria. They adhere to the underside of semi-translucent rocks in desert pavements, providing them with a refuge from the harsh abiotic stresses found on the desert soil surface. Despite their crucial role in soil nutrient cycling, our understanding of their growth rates and community development pathways remains limited. This study aimed to quantify the dynamics of hypolithon formation in the pavements of the Namib Desert. We established replicate arrays of sterile rock tiles with varying light transmission in two areas of the Namib Desert, each with different annual precipitation regimes. These were sampled annually over 7 years, and the samples were analysed using eDNA extraction and 16S rRNA gene amplicon sequencing. Our findings revealed that in the zone with higher precipitation, hypolithon formation became evident in semi-translucent rocks 3 years after the arrays were set up. This coincided with a Cyanobacterial 'bloom' in the adherent microbial community in the third year. In contrast, no visible hypolithon formation was observed at the array set up in the hyper-arid zone. This study provides the first quantitative evidence of the kinetics of hypolithon development in hot desert environments, suggesting that development rates are strongly influenced by precipitation regimes. Analysis of the microbial composition of desert sub-lithic hypolithon communities growing under semi-translucent rocks over a period of 7 years has provided the first quantitative evidence of a timeline for early hypolithon development. Data from this study has led us to propose a hypolithon development involving initial recruitment of specific soil Cyanobacteria to the illuminated soil surface immediately underneath a translucent rock followed by a transition to an adherent state triggered by wet-dry cycles, and further maturation to hypolithon biofilm. image
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:001252518900001
WOS关键词	NAMIB DESERT ; ECOLOGY ; COLONIZATION ; GENE ; FOG ; IDENTIFICATION ; CYANOBACTERIA ; DIVERSITY ; SILVA ; ROCK
WOS类目	Environmental Sciences ; Microbiology
WOS研究方向	Environmental Sciences & Ecology ; Microbiology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/403578
推荐引用方式 GB/T 7714	Bosch, Jason,Lebre, Pedro H.,Marais, Eugene,et al. Kinetics and pathways of sub-lithic microbial community (hypolithon) development[J],2024,16(3).
APA	Bosch, Jason,Lebre, Pedro H.,Marais, Eugene,Maggs-Kolling, Gillian,&Cowan, Don A..(2024).Kinetics and pathways of sub-lithic microbial community (hypolithon) development.ENVIRONMENTAL MICROBIOLOGY REPORTS,16(3).
MLA	Bosch, Jason,et al."Kinetics and pathways of sub-lithic microbial community (hypolithon) development".ENVIRONMENTAL MICROBIOLOGY REPORTS 16.3(2024).