干旱区生态环境知识资源中心(Arid): Role of shrubs in the community assembly of biocrusts: the biotic and abiotic influences along a biocrust succession gradient

Arid

DOI	10.1007/s11104-020-04789-6
	Role of shrubs in the community assembly of biocrusts: the biotic and abiotic influences along a biocrust succession gradient
	Sun, Jingyao; Li, Xinrong
通讯作者	Li, XR (corresponding author), Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Shapotou Desert Res & Expt Stn, Donggang West Rd 320, Lanzhou 730000, Peoples R China.
来源期刊	PLANT AND SOIL
ISSN	0032-079X
EISSN	1573-5036
出版年	2021
卷号	460 期号:1-2 页码:163-176
英文摘要	Aims In water-limited areas, shrubs influence biological soil crust (biocrust) composition and diversity via soil microenvironment alterations and through modifying biotic interactions amongst biocrust taxa. However, the relative contributions of shrubs to biocrust succession and assembly via the biotic and abiotic influences are poorly known. Methods The community composition of biocrusts and soil properties in the interspace and beneath the dominant shrub (Artemisia ordosica) along a biocrust succession sequence were investigated. Biocrust interspecific interactions at a small scale (within shrub) were evaluated based on the co-occurrence pattern using null models. A hypothetical multigroup structural equation model (SEM) was proposed to evaluate the influence of multiple variables on the biocrust richness and to investigate the path variance between successional stages. Results Along the biocrust succession, shrubs significantly increased the size of bare soil gap by 489%, decreased lichens by 43% and increased soil organic matter by 13%. In years 18, 31and 37, the paths in SEM explained 59% of the variation in richness, only the effect of abiotic amelioration was significant (0.62). In years 54 and 62, the shrubs had direct (0.37) and indirect effect (0.10) via species interaction to biocrust richness. Conclusions Shrubs directly and indirectly affected the community assembly of biocrusts. Biocrust species interactions are an important driver of biocrust diversity and primarily affect late succession. The increasing influences of shrubs suggests a close relationship between shrub and biocrust components in arid or semiarid ecosystems, with shrubs playing an important role in regulating biocrust assembly and maintaining biocrust richness.
英文关键词	Biocrust Structural equation model Co-occurrence pattern Succession Space-for-time substitution
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000605883500001
WOS关键词	BIOLOGICAL SOIL CRUSTS ; PLANT-COMMUNITIES ; SPECIES COOCCURRENCE ; MICROBIOTIC CRUSTS ; TENGGER DESERT ; MODEL ; DIVERSITY ; COMPETITION ; WATER ; ENCROACHMENT
WOS类目	Agronomy ; Plant Sciences ; Soil Science
WOS研究方向	Agriculture ; Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/351328
作者单位	[Sun, Jingyao; Li, Xinrong] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Shapotou Desert Res & Expt Stn, Donggang West Rd 320, Lanzhou 730000, Peoples R China; [Sun, Jingyao] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Sun, Jingyao,Li, Xinrong. Role of shrubs in the community assembly of biocrusts: the biotic and abiotic influences along a biocrust succession gradient[J],2021,460(1-2):163-176.
APA	Sun, Jingyao,&Li, Xinrong.(2021).Role of shrubs in the community assembly of biocrusts: the biotic and abiotic influences along a biocrust succession gradient.PLANT AND SOIL,460(1-2),163-176.
MLA	Sun, Jingyao,et al."Role of shrubs in the community assembly of biocrusts: the biotic and abiotic influences along a biocrust succession gradient".PLANT AND SOIL 460.1-2(2021):163-176.