干旱区生态环境知识资源中心(Arid): Interconnected effects of shrubs, invertebrate-derived macropores and soil texture on water infiltration in a semi-arid savanna rangeland

Arid

DOI	10.1002/ldr.3598
	Interconnected effects of shrubs, invertebrate-derived macropores and soil texture on water infiltration in a semi-arid savanna rangeland
	Marquart, Arnim 1,2; Eldridge, David J.3; Geissler, Katja 1; Lobas, Christoph 1; Blaum, Niels 1
通讯作者	Marquart, Arnim
来源期刊	LAND DEGRADATION & DEVELOPMENT
ISSN	1085-3278
EISSN	1099-145X
出版年	2020
卷号	31 期号:16 页码:2307-2318
英文摘要	Many semi arid savannas are prone to degradation, caused for example, by overgrazing or extreme climatic events, which often lead to shrub encroachment. Overgrazing by livestock affects vegetation and infiltration processes by directly altering plant composition (selective grazing) or by impacting soil physical properties (trampling). Water infiltration is controlled by several parameters, such as macropores (created by soil-burrowing animals or plant roots) and soil texture, but their effects have mostly been studied in isolation. Here we report on a study, in which we conducted infiltration experiments to analyze the interconnected effects of invertebrate-created macropores, shrubs and soil texture (sandy soil and loamy sand) on infiltration in two Namibian rangelands. Using structural equation modeling, we found a direct positive effect of shrub size on infiltration and indirectly via invertebrate macropores on both soil types. On loamy sands this effect was even stronger, but additionally, invertebrate-created macropores became relevant as a direct driver of infiltration. Our results provide new insights into the effects of vegetation and invertebrates on infiltration under different soil textures. Pastoralists should use management strategies that maintain a heterogeneous plant community that supports soil fauna to sustain healthy soil water dynamics, particularly on soils with higher loam content. Understanding the fundamental functioning of soil water dynamics in drylands is critical because these ecosystems are water-limited and support the livelihoods of many cultures worldwide.
英文关键词	hydrology infiltration invertebrate macropores shrub-encroachment soil function soil texture
类型	Article
语种	英语
国家	Germany ; South Africa ; Australia
收录类别	SCI-E
WOS记录号	WOS:000523278800001
WOS关键词	CHIHUAHUAN DESERT ; SPATIAL-PATTERNS ; ENCROACHMENT ; VEGETATION ; DYNAMICS ; GRASSLAND ; RAINFALL ; IMPACT ; DIVERSITY ; HERBIVORY
WOS类目	Environmental Sciences ; Soil Science
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315132
作者单位	1.Univ Potsdam, Inst Biochem & Biol, Dept Plant Ecol & Nat Conservat, Muhlenberg 3, D-14476 Potsdam, Germany; 2.North West Univ, Environm Sci & Management, Potchefstroom, South Africa; 3.Univ New South Wales, Sch Biol Earth & Environm Sci, Ctr Ecosyst Sci, Sydney, NSW, Australia
推荐引用方式 GB/T 7714	Marquart, Arnim,Eldridge, David J.,Geissler, Katja,et al. Interconnected effects of shrubs, invertebrate-derived macropores and soil texture on water infiltration in a semi-arid savanna rangeland[J],2020,31(16):2307-2318.
APA	Marquart, Arnim,Eldridge, David J.,Geissler, Katja,Lobas, Christoph,&Blaum, Niels.(2020).Interconnected effects of shrubs, invertebrate-derived macropores and soil texture on water infiltration in a semi-arid savanna rangeland.LAND DEGRADATION & DEVELOPMENT,31(16),2307-2318.
MLA	Marquart, Arnim,et al."Interconnected effects of shrubs, invertebrate-derived macropores and soil texture on water infiltration in a semi-arid savanna rangeland".LAND DEGRADATION & DEVELOPMENT 31.16(2020):2307-2318.