干旱区生态环境知识资源中心(Arid): Disentangling the effects of two co-occurring biotic modifiers on vegetation properties in a semi-arid savannah ecosystem

Arid

DOI	10.1016/j.jaridenv.2021.104504
	Disentangling the effects of two co-occurring biotic modifiers on vegetation properties in a semi-arid savannah ecosystem
	Louw, M. A.; Haussmann, N. S.; le Roux, P. C.
通讯作者	Louw, MA (corresponding author), Univ Pretoria, Dept Plant & Soil Sci, Private Bag X20, ZA-0028 Hatfield, South Africa.
来源期刊	JOURNAL OF ARID ENVIRONMENTS
ISSN	0140-1963
EISSN	1095-922X
出版年	2021
卷号	189
英文摘要	Biotic modifiers are species that strongly alter environmental conditions, and that often shape local communities. When more than one biotic modifier co-occurs, the potential for interactive effects exists, where the effects of one species may negate or enhance the impacts of a second biotic modifier. Here we test for an interactive effect of aardvark (Orycteropus afer) burrows and tree presence on soil (soil temperature, moisture and compaction) and understorey vegetation properties (plant cover, species richness and composition) in a semi-arid savannah. Aardvark burrowing altered abiotic conditions, with soil temperature and compaction being lower, and soil moisture higher, in burrow entrances than at the burrow mounds and control microsites. In addition, the impact of aardvark burrowing on soil moisture and soil compaction was mediated by the occurrence of trees. In contrast, vegetation cover and species richness were independently affected by burrowing and trees, while vegetation composition was only affected by the occurrence of trees, but not by burrowing. This research suggests that co-occurring biotic modifiers can have both independent and interactive effects, and disentangling their impacts will help understand the mechanisms underlying dryland plant communities.
英文关键词	Aardvark Burrow Ecosystem engineer Microhabitat Shade Soil characteristics
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000647760200005
WOS关键词	SOIL NUTRIENTS ; NEGEV DESERT ; SOUTH-AFRICA ; BURROWS ; DISTURBANCES ; HETEROGENEITY ; WATER ; INFILTRATION ; GERMINATION ; ORGANISMS
WOS类目	Ecology ; 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/2XILL650/350705
作者单位	[Louw, M. A.; le Roux, P. C.] Univ Pretoria, Dept Plant & Soil Sci, Private Bag X20, ZA-0028 Hatfield, South Africa; [Louw, M. A.] Univ Cape Town, Dept Biol Sci, Private Bag X3, ZA-7701 Rondebosch, South Africa; [Louw, M. A.] Univ Cape Town, Ctr Stat Ecol Environm & Conservat, Dept Stat Sci, Private Bag X3, ZA-7701 Rondebosch, South Africa; [Haussmann, N. S.] Univ Pretoria, Dept Geog Geoinformat & Meteorol, Private Bag X20, ZA-0028 Hatfield, South Africa
推荐引用方式 GB/T 7714	Louw, M. A.,Haussmann, N. S.,le Roux, P. C.. Disentangling the effects of two co-occurring biotic modifiers on vegetation properties in a semi-arid savannah ecosystem[J],2021,189.
APA	Louw, M. A.,Haussmann, N. S.,&le Roux, P. C..(2021).Disentangling the effects of two co-occurring biotic modifiers on vegetation properties in a semi-arid savannah ecosystem.JOURNAL OF ARID ENVIRONMENTS,189.
MLA	Louw, M. A.,et al."Disentangling the effects of two co-occurring biotic modifiers on vegetation properties in a semi-arid savannah ecosystem".JOURNAL OF ARID ENVIRONMENTS 189(2021).