干旱区生态环境知识资源中心(Arid): Soil-texture affects the influence of termite macropores on soil water infiltration in a semi-arid savanna

Arid

DOI	10.1002/eco.2249
	Soil-texture affects the influence of termite macropores on soil water infiltration in a semi-arid savanna
	Marquart, Arnim; Goldbach, Lars; Blaum, Niels
通讯作者	Marquart, A
来源期刊	ECOHYDROLOGY
ISSN	1936-0584
EISSN	1936-0592
出版年	2020
卷号	13 期号:8
英文摘要	Subterranean termites create tunnels (macropores) for foraging that can influence water infiltration and may lead to preferential flow to deeper soil layers. This is particularly important in water limited ecosystems such as semi-arid, agriculturally utilized savannas, which are particularly prone to land degradation and shrub-encroachment. Using termite activity has been suggested as a restoration measure, but their impact on hydrology is neither universal nor yet fully understood. Here, we used highly replicated, small-scale (50 x 50 cm) rain-simulation experiments to analyse the interacting effects of either vegetation (grass dominated vs. shrub dominated sites) or soil texture (sand vs. loamy sand) and termite foraging macropores on infiltration patterns. We used Brilliant Blue FCF as colour tracer to make the flow pathways in paired experiments visible, on either termite-disturbed soil or controls without surface macropores in two semi-arid Namibian savannas (with either heterogeneous soil texture or shrub cover). On highly shrub-encroached plots in the savanna site with heterogeneous soil texture, termite macropores increased maximum infiltration depth and total amount of infiltrated water on loamy sand, but not on sandy soil. In the sandy savanna with heterogeneous shrub cover, neither termite activity nor shrub density affected the infiltration. Termite's effect on infiltration depends on the soil's hydraulic conductivity and occurs mostly under ponded conditions, intercepting run-off. In semi-arid savanna soils with a considerable fraction of fine particles, termites are likely an important factor for soil water dynamics.
英文关键词	ecosystem functioning infiltration macropores rain-simulation shrub-encroachment soil texture termites
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000567647600001
WOS关键词	BRILLIANT BLUE FCF ; SUBTERRANEAN TERMITES ; ECOSYSTEM SERVICES ; PREFERENTIAL FLOW ; RUNOFF ; TRACER ; QUANTIFICATION ; RESTORATION ; MOUNDS
WOS类目	Ecology ; 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/2XILL650/326159
作者单位	[Marquart, Arnim] North West Univ, Unit Environm Sci & Management, ZA-2520 Potchefstroom, South Africa; [Marquart, Arnim; Goldbach, Lars; Blaum, Niels] Univ Potsdam, Dept Plant Ecol & Nat Conservat, Inst Biochem & Biol, Potsdam, Germany
推荐引用方式 GB/T 7714	Marquart, Arnim,Goldbach, Lars,Blaum, Niels. Soil-texture affects the influence of termite macropores on soil water infiltration in a semi-arid savanna[J],2020,13(8).
APA	Marquart, Arnim,Goldbach, Lars,&Blaum, Niels.(2020).Soil-texture affects the influence of termite macropores on soil water infiltration in a semi-arid savanna.ECOHYDROLOGY,13(8).
MLA	Marquart, Arnim,et al."Soil-texture affects the influence of termite macropores on soil water infiltration in a semi-arid savanna".ECOHYDROLOGY 13.8(2020).