气候变化领域集成服务门户(CCPortal): Null-model analysis and changes in species interactions in biocrusts along a successional gradient in the Tengger Desert, northern China

CCPortal

DOI	10.1111/jvs.13037
	Null-model analysis and changes in species interactions in biocrusts along a successional gradient in the Tengger Desert, northern China
	Sun, Jingyao; Li, Xinrong; Jia, Rongliang; Chen, Ning; Zhang, Tian
通讯作者	Li, XR (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Shapotou Desert Res & Expt Stn, Lanzhou 730000, Peoples R China.
发表日期	2021
ISSN	1100-9233
EISSN	1654-1103
卷号	32 期号:3
英文摘要	Aims In arid regions, the succession of biological soil crusts (biocrusts) usually accompanies substantial turnover of community composition. How interspecific interactions among biocrust-forming mosses, lichens, algae and cyanobacteria change along the successional gradient is largely unknown. According to the stress gradient hypothesis (SGH), the frequency or intensity of facilitative and competitive interactions within the community will vary along an environmental stress gradient, with an increasing role of competition relative to facilitation under more benign environmental conditions. In the process of biocrust succession, decreasing soil stress also occurs because of slow soil amelioration, which meets the assumption of the SGH. Therefore, we hypothesize that the changes in facilitative and competitive interactions within biocrust communities will follow the prediction of the SGH and that the nature of biocrust interactions will also change. Location Sand-binding vegetation belts for the Baotou-Lanzhou railway at the southeast fringe of the Tengger Desert in the Shapotou region of the Ningxia Hui Autonomous Region, western China. Methods We conducted a field evaluation at five adjacent sand-binding vegetation belts built in chronosequence to study the successional gradient. Small-scale patterns of co-occurrence and null models were used to evaluate the community-level interspecific interactions among the biocrust-forming mosses, lichens, algae and cyanobacteria. In addition, an accessory method of species-pair co-occurrence based on null models was also applied to potentially identify the nature of the interspecific interactions within the biocrusts and for the causal investigation of these patterns. Results A strong spatial segregation of co-occurrence patterns occurred between cyanobacteria and algae and species of mosses and lichens at early succession, and occurred among species of mosses and lichens at late succession, while the weak spatial aggregation between lichen species only occurred at middle succession. Conclusions Negative interspecific interactions were prevalent within biocrusts throughout succession. The co-occurrence patterns at both the community and species-pair levels are consistent, supporting the unimodal version of the SGH that species interactions shift toward competition under extremely stressed conditions. Given the lack of research on interspecific interactions in biocrusts, our study is important for obtaining a deeper understanding of biocrust succession.
关键词	BIOLOGICAL SOIL CRUSTS POSITIVE INTERACTIONS BIOTIC INTERACTIONS FACILITATION COMPETITION COMMUNITIES STRESS HYPOTHESIS DIVERSITY STABILIZATION
英文关键词	biological soil crust; co-occurrence pattern; null model; space-for-time substitution; stress gradient hypothesis; succession
语种	英语
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology ; Forestry
WOS类目	Plant Sciences ; Ecology ; Forestry
WOS记录号	WOS:000666878600015
来源期刊	JOURNAL OF VEGETATION SCIENCE
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/254369
作者单位	[Sun, Jingyao; Li, Xinrong; Jia, Rongliang; Zhang, Tian] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Shapotou Desert Res & Expt Stn, Lanzhou 730000, Peoples R China; [Sun, Jingyao; Zhang, Tian] Univ Chinese Acad Sci, Beijing, Peoples R China; [Chen, Ning] Lanzhou Univ, Sch Life Sci, State Key Lab Grassland Agroecosyst, Lanzhou, Peoples R China
推荐引用方式 GB/T 7714	Sun, Jingyao,Li, Xinrong,Jia, Rongliang,et al. Null-model analysis and changes in species interactions in biocrusts along a successional gradient in the Tengger Desert, northern China[J]. 中国科学院西北生态环境资源研究院,2021,32(3).
APA	Sun, Jingyao,Li, Xinrong,Jia, Rongliang,Chen, Ning,&Zhang, Tian.(2021).Null-model analysis and changes in species interactions in biocrusts along a successional gradient in the Tengger Desert, northern China.JOURNAL OF VEGETATION SCIENCE,32(3).
MLA	Sun, Jingyao,et al."Null-model analysis and changes in species interactions in biocrusts along a successional gradient in the Tengger Desert, northern China".JOURNAL OF VEGETATION SCIENCE 32.3(2021).