干旱区生态环境知识资源中心(Arid): Soil and vegetation differences across ecological boundaries in an arid South African ecosystem

Arid

DOI	10.1111/aje.12612
	Soil and vegetation differences across ecological boundaries in an arid South African ecosystem
	Osman, Rua 1; Masubelele, Mmoto 2; Khomo, Lesego 3; Chimphango, Samson B. M.1
通讯作者	Khomo, Lesego
来源期刊	AFRICAN JOURNAL OF ECOLOGY
ISSN	0141-6707
EISSN	1365-2028
出版年	2019
卷号	57 期号:3 页码:344-352
英文摘要	Boundaries are the most reactive nodes in landscapes and may be hypersensitive to global change in climate and land use. Investigations on how soils govern vegetation boundaries are scant, particularly in arid and semiarid ecosystems. The Tankwa Karoo National Park (TKNP) is a unique arid biodiversity hotspot with an unrivalled aridity gradient from < 100 mm MAP to about 700 mm in < 10 km. We investigated the abruptness of four soil-vegetation boundaries separating eight communities. Two 50 m transects were established across four boundaries for 24 descending point transects, in which the cover-abundance of each plant encounter at 1 m intervals was recorded. In addition, three soil samples were collected from the top 5 cm in each of the four boundaries and twelve patches. Soil and vegetation parameters altogether indicated three boundary syndromes that were context dependent: (a) a sharp boundary, (b) a gradual boundary or (c) no boundary exists. Soil respiration recorded here, and perhaps other ecosystem processes, was mediated by the soil-vegetation boundaries. These nodes should be the focus of ecological studies since they reveal much more than the constituent patches themselves.
英文关键词	ecological boundary soil properties soil respiration Tankwa Karoo National Park vegetation
类型	Article
语种	英语
国家	South Africa
收录类别	SCI-E
WOS记录号	WOS:000480296300007
WOS关键词	KRUGER-NATIONAL-PARK ; LANDSCAPE ECOLOGY ; SAVANNA ; CARBON ; CLIMATE ; HETEROGENEITY ; BIODIVERSITY ; SHRUBLANDS ; COMMUNITY ; ECOTONES
WOS类目	Ecology
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/2XILL650/213913
作者单位	1.Univ Cape Town, Dept Biol Sci, Cape Town, South Africa; 2.South African Natl Parks, Cape Res Ctr, Pretoria, South Africa; 3.Univ South Africa, Dept Environm Sci, Pretoria, South Africa
推荐引用方式 GB/T 7714	Osman, Rua,Masubelele, Mmoto,Khomo, Lesego,et al. Soil and vegetation differences across ecological boundaries in an arid South African ecosystem[J],2019,57(3):344-352.
APA	Osman, Rua,Masubelele, Mmoto,Khomo, Lesego,&Chimphango, Samson B. M..(2019).Soil and vegetation differences across ecological boundaries in an arid South African ecosystem.AFRICAN JOURNAL OF ECOLOGY,57(3),344-352.
MLA	Osman, Rua,et al."Soil and vegetation differences across ecological boundaries in an arid South African ecosystem".AFRICAN JOURNAL OF ECOLOGY 57.3(2019):344-352.