干旱区生态环境知识资源中心(Arid): The potential of groundwater-dependent ecosystems to enhance soil biological activity and soil fertility in drylands

Arid

DOI	10.1016/j.scitotenv.2022.154111
	The potential of groundwater-dependent ecosystems to enhance soil biological activity and soil fertility in drylands
	Trinidad Torres-Garcia, M.; Oyonarte, Cecilio; Cabello, Javier; Guirado, Emilio; Rodriguez-Lozano, Borja; Jacoba Salinas-Bonillo, M.
通讯作者	Torres-García, MT
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2022
卷号	826
英文摘要	Water availability controls the functioning of dryland ecosystems, driving a patchy vegetation distribution, unequal nutrient availability, soil respiration in pulses, and limited productivity. Groundwater-dependent ecosystems (GDEs) are acknowledged to be decoupled from precipitation, since their vegetation relies on groundwater sources. Despite their relevance to enhance productivity in drylands, our understanding of how different components of GDEs interconnect (i.e., soil, vegetation, water) remains limited. We studied the GDE dominated by the deep-rooted phreatophyte Ziziphus lotus, a winter-deciduous shrub adapted to arid conditions along the Mediterranean basin. We aimed to disentangle whether the groundwater connection established by Z. lotus will foster soil biological activity and therefore soil fertility in drylands. We assessed (1) soil and vegetation dynamics over seasons (soil CO2 efflux and plant activity), (2) the effect of the patchy distribution on soil quality (properties and nutrient availability), and soil biological activity (microbial biomass and mineralization rates) as essential elements of biogeochemical cycles, and (3) the implications for preserving GDEs and their biogeochemical processes under climate change effects. We found that soil and vegetation dynamics respond to water availability. Whereas soil biological activity promptly responded to precipitation events, vegetation functioning relies on less superficial water and responded on different time scales. Soil quality was higher under the vegetation patches, as was soil biological activity. Our findings highlight the importance of groundwater connections and phreatophytic vegetation to increase litter inputs and organic matter into the soils, which in turn enhances soil quality and decomposition processes in drylands. However, biogeochemical processes are jeopardized in GDEs by climate change effects and land degradation due to the dependence of soil activity on: specialIntscript precipitation for activation, and specialIntscript phreatophytic vegetation for substrate accumulation. Therefore, desertification might modify biogeochemical cycles by disrupting key ecosystem processes such as soil microbial activity, organic matter mineralization, and plant productivity.
英文关键词	Fertility island Normalized difference vegetation index (NDVI) Soil microbial biomass Semi-arid region Soil quality Ziziphus lotus
类型	Article
语种	英语
开放获取类型	Green Published, hybrid
收录类别	SCI-E
WOS记录号	WOS:000787321400003
WOS关键词	MICROBIAL BIOMASS ; PHREATOPHYTIC VEGETATION ; ORGANIC-CARBON ; CLIMATE-CHANGE ; GREAT-BASIN ; RESPIRATION ; PRECIPITATION ; VARIABILITY ; SHRUBS ; TEMPERATURE
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/394362
推荐引用方式 GB/T 7714	Trinidad Torres-Garcia, M.,Oyonarte, Cecilio,Cabello, Javier,et al. The potential of groundwater-dependent ecosystems to enhance soil biological activity and soil fertility in drylands[J],2022,826.
APA	Trinidad Torres-Garcia, M.,Oyonarte, Cecilio,Cabello, Javier,Guirado, Emilio,Rodriguez-Lozano, Borja,&Jacoba Salinas-Bonillo, M..(2022).The potential of groundwater-dependent ecosystems to enhance soil biological activity and soil fertility in drylands.SCIENCE OF THE TOTAL ENVIRONMENT,826.
MLA	Trinidad Torres-Garcia, M.,et al."The potential of groundwater-dependent ecosystems to enhance soil biological activity and soil fertility in drylands".SCIENCE OF THE TOTAL ENVIRONMENT 826(2022).