干旱区生态环境知识资源中心(Arid): Water Regulation in Cyanobacterial Biocrusts from Drylands: Negative Impacts of Anthropogenic Disturbance

Arid

DOI	10.3390/w12030720
	Water Regulation in Cyanobacterial Biocrusts from Drylands: Negative Impacts of Anthropogenic Disturbance
	Canton, Yolanda 1,2; Chamizo, Sonia 1,2; Rodriguez-Caballero, Emilio 1,2; Lazar, Roberto 3; Roncero-Ramos, Beatriz 1; Raul Roman, Jose 1; Sole-Benet, Albert 3
通讯作者	Canton, Yolanda
来源期刊	WATER
EISSN	2073-4441
出版年	2020
卷号	12 期号:3
英文摘要	Arid and semi-arid ecosystems are characterized by patchy vegetation and variable resource availability. The interplant spaces of these ecosystems are very often covered by cyanobacteria-dominated biocrusts, which are the primary colonizers of terrestrial ecosystems and key in facilitating the succession of other biocrust organisms and plants. Cyanobacterial biocrusts regulate the horizontal and vertical fluxes of water, carbon and nutrients into and from the soil and play crucial hydrological, geomorphological and ecological roles in these ecosystems. In this paper, we analyze the influence of cyanobacterial biocrusts on water balance components (infiltration-runoff, evaporation, soil moisture and non-rainfall water inputs (NRWIs)) in representative semiarid ecosystems in southeastern Spain. The influence of cyanobacterial biocrusts, in two stages of their development, on runoff-infiltration was studied by rainfall simulation and in field plots under natural rainfall at different spatial scales. Results showed that cover, exopolysaccharide content, roughness, organic carbon, total nitrogen, available water holding capacity, aggregate stability, and other properties increased with the development of the cyanobacterial biocrust. Due to the effects on these soil properties, runoff generation was lower in well-developed than in incipient-cyanobacterial biocrusts under both simulated and natural rainfall and on different spatial scales. Runoff yield decreased at coarser spatial scales due to re-infiltration along the hillslope, thus decreasing hydrological connectivity. Soil moisture monitoring at 0.03 m depth revealed higher moisture content and slower soil water loss in plots covered by cyanobacterial biocrusts compared to bare soils. Non-rainfall water inputs were also higher under well-developed cyanobacterial biocrusts than in bare soils. Disturbance of cyanobacterial biocrusts seriously affected the water balance by increasing runoff, decreasing soil moisture and accelerating soil water loss, at the same time that led to a very significant increase in sediment yield. The recovery of biocrust cover after disturbance can be relatively fast, but its growth rate is strongly conditioned by microclimate. The results of this paper show the important influence of cyanobacterial biocrust in modulating the different processes supporting the capacity of these ecosystems to provide key services such as water regulation or erosion control, and also the important impacts of their anthropic disturbance.
英文关键词	biological soil crust arid runoff infiltration soil water balance dew
类型	Article
语种	英语
国家	Spain
开放获取类型	gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:000529249500105
WOS关键词	BIOLOGICAL SOIL CRUSTS ; LOESS PLATEAU REGION ; MICROBIOTIC CRUSTS ; NEGEV DESERT ; HYDRAULIC CONDUCTIVITY ; PHYSICAL DISTURBANCE ; SUCCESSIONAL STAGE ; DEW FORMATION ; SAND DUNES ; RUNOFF
WOS类目	Environmental Sciences ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/318878
作者单位	1.Univ Almeria, Dept Agron, Carretera Sacramento SN, Almeria 04120, Spain; 2.Univ Almeria CECOUAL, Res Ctr Sci Collect, Carretera Sacramento SN, Almeria 04120, Spain; 3.CSIC, Expt Stn Arid Zones, Carretera Sacramento SN, Almeria 04120, Spain
推荐引用方式 GB/T 7714	Canton, Yolanda,Chamizo, Sonia,Rodriguez-Caballero, Emilio,et al. Water Regulation in Cyanobacterial Biocrusts from Drylands: Negative Impacts of Anthropogenic Disturbance[J],2020,12(3).
APA	Canton, Yolanda.,Chamizo, Sonia.,Rodriguez-Caballero, Emilio.,Lazar, Roberto.,Roncero-Ramos, Beatriz.,...&Sole-Benet, Albert.(2020).Water Regulation in Cyanobacterial Biocrusts from Drylands: Negative Impacts of Anthropogenic Disturbance.WATER,12(3).
MLA	Canton, Yolanda,et al."Water Regulation in Cyanobacterial Biocrusts from Drylands: Negative Impacts of Anthropogenic Disturbance".WATER 12.3(2020).