气候变化领域集成服务门户(CCPortal): Role of shrubs in the community assembly of biocrusts: the biotic and abiotic influences along a biocrust succession gradient

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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 (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Shapotou Desert Res & Expt Stn, Donggang West Rd 320, Lanzhou 730000, Peoples R China.
发表日期	2021
ISSN	0032-079X
EISSN	1573-5036
起始页码	163
结束页码	176
卷号	460 期号:1-2
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.
关键词	BIOLOGICAL SOIL CRUSTS PLANT-COMMUNITIES SPECIES COOCCURRENCE MICROBIOTIC CRUSTS TENGGER DESERT MODEL DIVERSITY COMPETITION WATER ENCROACHMENT
英文关键词	Biocrust; Structural equation model; Co-occurrence pattern; Succession; Space-for-time substitution
语种	英语
WOS研究方向	Agriculture ; Plant Sciences
WOS类目	Agronomy ; Plant Sciences ; Soil Science
WOS记录号	WOS:000605883500001
来源期刊	PLANT AND SOIL
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/253899
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]. 中国科学院西北生态环境资源研究院,2021,460(1-2).
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).
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).