干旱区生态环境知识资源中心(Arid): Does biocrust successional stage determine the degradation of vascular vegetation via alterations in its hydrological roles in semi-arid ecosystem?

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DOI	10.1002/eco.2075
	Does biocrust successional stage determine the degradation of vascular vegetation via alterations in its hydrological roles in semi-arid ecosystem?
	Guan, Hongjie 1,2; Liu, Xinyu 3
通讯作者	Guan, Hongjie
来源期刊	ECOHYDROLOGY
ISSN	1936-0584
EISSN	1936-0592
出版年	2019
卷号	12 期号:3
英文摘要	Biocrusts may influence soil moisture by changing soil hydrological properties and thus affect the growth of vascular vegetation. However, their effects on soil moisture and vascular vegetation have not been sufficiently evaluated. In this study, five treatments, including bare land with sporadic cyanobacterial biocrusts (BL), lichen-dominated biocrusts, Artemisia ordosica (AO), A. ordosica with moss biocrusts, and old-aged A. ordosica with moss biocrusts (OAMB), were established to evaluate the effects of biocrusts on soil hydrological properties and shrub growth. Our results showed that the field capacity (theta(f)) and saturated soil moisture (theta(s)) for the OAMB treatment was higher than that for the BL treatment, although the difference between the five treatments was insignificant. The OAMB treatment deceased soil moisture 8.7% on average due to their significant lower saturated hydraulic conductivity (K-s) (82.9%), compared with the BL treatment. The OAMB treatment protected against soil water loss during the beginning stages of evaporation and facilitated soil evaporation during the late stages. Interestingly, the soil water condition underneath the OAMB treatment was not improved after the degradation of AO. The A. ordosica with moss biocrusts treatment had 12.7% lower aboveground biomass and 46.0% lower twig biomass than that for the AO treatment, suggesting the negative effects of biocrusts on the growth of artificially planted shrubs. The findings have important implications for the competitive relationships between biocrusts and vascular vegetation and managing artificial planted shrubs.
英文关键词	patchy vegetation soil evaporation soil infiltrability soil moisture soil water holding capacity
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000462937800004
WOS关键词	BIOLOGICAL SOIL CRUSTS ; DESERT ; WATER ; INFILTRATION ; MOISTURE ; SANDY ; EVAPORATION ; DYNAMICS ; RUNOFF
WOS类目	Ecology ; Environmental Sciences ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
来源机构	北京师范大学 ; 北京林业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215132
作者单位	1.Beijing Forestry Univ, Sch Soil & Water Conservat, Yanchi Res Stn, Beijing 100083, Peoples R China; 2.Beijing Forestry Univ, Key Lab State Forestry Adm Soil & Water Conservat, Beijing, Peoples R China; 3.Beijing Normal Univ, Fac Geog Sci, MOE Engn Res Ctr Desertificat & Blown Sand Contro, State Key Lab Earth Surface Proc & Resource Ecol, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Guan, Hongjie,Liu, Xinyu. Does biocrust successional stage determine the degradation of vascular vegetation via alterations in its hydrological roles in semi-arid ecosystem?[J]. 北京师范大学, 北京林业大学,2019,12(3).
APA	Guan, Hongjie,&Liu, Xinyu.(2019).Does biocrust successional stage determine the degradation of vascular vegetation via alterations in its hydrological roles in semi-arid ecosystem?.ECOHYDROLOGY,12(3).
MLA	Guan, Hongjie,et al."Does biocrust successional stage determine the degradation of vascular vegetation via alterations in its hydrological roles in semi-arid ecosystem?".ECOHYDROLOGY 12.3(2019).