干旱区生态环境知识资源中心(Arid): Anthropogenic erosion-induced small-scale soil heterogeneity in South African rangelands

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DOI	10.1016/j.ancene.2021.100290
	Anthropogenic erosion-induced small-scale soil heterogeneity in South African rangelands
	Krenz, Juliane; Greenwood, Philip; Kuhn, Nikolaus J.
通讯作者	Krenz, J (corresponding author), Univ Basel, Phys Geog & Environm Change, Klingelbergstr 27, CH-4056 Basel, Switzerland.
来源期刊	ANTHROPOCENE
ISSN	2213-3054
出版年	2021
卷号	34
英文摘要	Land-use-induced soil erosion in semi-arid drylands induced by land-use changes creates patchworks of soils and vegetation different from those of natural conditions. Knowledge of the highly dynamic spatial heterogeneity in soil properties, not depicted in conventional soil maps, is important for managing land uses sustainably, and for understanding soil-climate interactions. This analysis of soil redistribution in a degraded rangeland in South Africa assessed the significance of anthropogenic soil heterogeneity within a small catchment with a silted reservoir. This study carries out analysis of soil redistribution in a degraded rangeland in South Africa, to assess the significance of anthropogenic soil heterogeneity within a small catchment with a silted-up reservoir. Surface soil (N = 51) and soil profile (N = 29) samples were collected from areas of various degrees of degradation and analysed for texture, pH, total nitrogen (TN), total organic carbon (TOC), available phosphorus (P), and potassium (K). Diverse vegetation cover is reflected in a high soil heterogeneity, showing differences in soil texture. Average surface soil nutrient content was significantly higher in vegetated areas (grassland: TOC 1.08 %, TN 0.10 %, P 20.12 mg kg(1), mixed vegetation: TOC 0.93 %, TN 0.08 %, P 13.54 mg kg(1), depositional: TOC 1.68 %, TN 0.18 %, P 34.67 mg kg(1)) than at degraded sites (TOC 0.47 %, TN 0.06 %, P 7.52 mg kg(1)). K content was low to moderate but did not show any significant difference between landscape units. Potential exists for the formation of distinct young anthropogenic soils on the silted-up reservoir where deposited sediments differed in TOC, TN, P, and profile depth from the shallow natural soils. Consequently, azonal soils on dam-deposits are different from those occurring naturally, and not depicted on conventional soil maps. Their different water and nutrient cycling may affect vegetation and biogeochemical fluxes. Land-use management should consider such soils, as they play an important role in rangeland ecology. (C) 2021 The Author(s). Published by Elsevier Ltd.
英文关键词	Soil redistribution Soil erosion Farm dams Reservoir siltation Young soil formation
类型	Article
语种	英语
开放获取类型	hybrid, Green Accepted
收录类别	SCI-E
WOS记录号	WOS:000661266000012
WOS关键词	CHECK-DAMS ; SEDIMENT YIELD ; SNEEUBERG UPLANDS ; KAROO UPLANDS ; EASTERN KAROO ; LONG-TERM ; CARBON ; VEGETATION ; RUNOFF ; LAND
WOS类目	Environmental Sciences ; Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Environmental Sciences & Ecology ; Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368732
作者单位	[Krenz, Juliane; Greenwood, Philip; Kuhn, Nikolaus J.] Univ Basel, Phys Geog & Environm Change, Klingelbergstr 27, CH-4056 Basel, Switzerland
推荐引用方式 GB/T 7714	Krenz, Juliane,Greenwood, Philip,Kuhn, Nikolaus J.. Anthropogenic erosion-induced small-scale soil heterogeneity in South African rangelands[J],2021,34.
APA	Krenz, Juliane,Greenwood, Philip,&Kuhn, Nikolaus J..(2021).Anthropogenic erosion-induced small-scale soil heterogeneity in South African rangelands.ANTHROPOCENE,34.
MLA	Krenz, Juliane,et al."Anthropogenic erosion-induced small-scale soil heterogeneity in South African rangelands".ANTHROPOCENE 34(2021).