干旱区生态环境知识资源中心(Arid): Precipitation and nitrogen deposition alter biocrust-vascular plant coexistence in a desert ecosystem: Threshold and mechanisms

Arid

DOI	10.1111/1365-2745.13834
	Precipitation and nitrogen deposition alter biocrust-vascular plant coexistence in a desert ecosystem: Threshold and mechanisms
	She, Weiwei; Chen, Ning; Zhang, Yuqing; Qin, Shugao; Bai, Yuxuan; Feng, Wei; Lai, Zongrui; Qiao, Yangui; Liu, Liang; Zhang, Wenjin; Miao, Chun
通讯作者	Zhang, YQ (corresponding author)，Beijing Forestry Univ, Sch Soil & Water Conservat, Yanchi Res Stn, Beijing, Peoples R China. ; Zhang, YQ (corresponding author)，Beijing Forestry Univ, Key Lab State Forestry Adm Soil & Water Conservat, Beijing, Peoples R China.
来源期刊	JOURNAL OF ECOLOGY
ISSN	0022-0477
EISSN	1365-2745
出版年	2022-01
英文摘要	Dryland ecosystems exist in various vegetation landscapes with contrasting compositions of vascular plants and biocrusts (surface-soil mats comprised of soil particles, cyanobacteria, lichens, mosses and fungi), and they are very vulnerable to ongoing global change. However, compared to vascular plants, the responses of biocrusts and their coexistence with vascular plants to global change remain elusive. We conducted a 5-year experiment involving multi-level precipitation and nitrogen addition in a desert shrubland of northern China to examine these responses. We found that shrubs, perennial herbs and annuals exhibited facilitative, competitive and insignificant effects on biocrusts respectively. Biocrusts coexisted with vascular plants below a threshold of herbaceous productivity of approximately 70 g/m(2) and tended to be replaced by herbs beyond this threshold, resulting from the balance between the shade tolerance of biocrusts and herb-induced light limitation. Increased precipitation and nitrogen enrichment altered biocrust-vascular plant composition by influencing this balance and tended to shift from a biocrust-dominated to a vascular plant-dominated state when the threshold was crossed. Synthesis. Our results suggest that biocrusts can coexist with dwarf shrubs and annuals, but cannot withstand perennial herbs when the herbaceous productivity threshold was exceeded. Our findings provide new insights into the threshold and mechanisms of biocrust-vascular plant coexistence, which may greatly contribute to managing dryland ecosystems for global change.
英文关键词	biological soil crust competition critical threshold nitrogen enrichment plant-plant interactions precipitation change shrubland
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000739484100001
WOS关键词	BIOLOGICAL SOIL CRUSTS ; CLIMATE-CHANGE ; CARBON ; CYANOBACTERIAL ; COMMUNITIES ; VEGETATION ; DIVERSITY ; DYNAMICS ; RAINFALL ; EROSION
WOS类目	Plant Sciences ; Ecology
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377181
作者单位	[She, Weiwei; Zhang, Yuqing; Qin, Shugao; Bai, Yuxuan; Feng, Wei; Lai, Zongrui; Qiao, Yangui; Liu, Liang; Zhang, Wenjin; Miao, Chun] Beijing Forestry Univ, Sch Soil & Water Conservat, Yanchi Res Stn, Beijing, Peoples R China; [She, Weiwei; Zhang, Yuqing; Feng, Wei; Lai, Zongrui] Beijing Forestry Univ, Key Lab State Forestry Adm Soil & Water Conservat, Beijing, Peoples R China; [Chen, Ning] Lanzhou Univ, Sch Life Sci, State Key Lab Grassland Agroecosyst, Lanzhou, Peoples R China; [Chen, Ning] Lanzhou Univ, Yuzhong Mt Ecosyst Field Observat & Res Stn, Lanzhou, Peoples R China; [Qin, Shugao] Beijing Forestry Univ, Minist Educ, Engn Res Ctr Forestry Ecol Engn, Beijing, Peoples R China
推荐引用方式 GB/T 7714	She, Weiwei,Chen, Ning,Zhang, Yuqing,et al. Precipitation and nitrogen deposition alter biocrust-vascular plant coexistence in a desert ecosystem: Threshold and mechanisms[J],2022.
APA	She, Weiwei.,Chen, Ning.,Zhang, Yuqing.,Qin, Shugao.,Bai, Yuxuan.,...&Miao, Chun.(2022).Precipitation and nitrogen deposition alter biocrust-vascular plant coexistence in a desert ecosystem: Threshold and mechanisms.JOURNAL OF ECOLOGY.
MLA	She, Weiwei,et al."Precipitation and nitrogen deposition alter biocrust-vascular plant coexistence in a desert ecosystem: Threshold and mechanisms".JOURNAL OF ECOLOGY (2022).