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DOI	10.1016/j.jaridenv.2020.104101
	Individual shrubs, large scale grass cover and seasonal rainfall explain invertebrate-derived macropore density in a semi-arid Namibian savanna
	Marquart, Arnim; Geissler, Katja; Heblack, Jessica; Lobas, Christoph; Muench, Elise; Blaum, Niels
通讯作者	Marquart, Arnim
来源期刊	JOURNAL OF ARID ENVIRONMENTS
ISSN	0140-1963
EISSN	1095-922X
出版年	2020
卷号	176
英文摘要	Macropores created by invertebrates improve ecosystem functions such as soil properties and hydrological processes. In semi-arid savannas, where water is the main limiting resource and precipitation is scarce macropores might increase infiltration, and thereby improve water availability for plants. Macropores may therefore represent a buffering mechanism counteracting degradation in the form of shrub-encroachment. We investigated the interacting effects of vegetation structures at small scales and vegetation cover at landscape scales, and seasonality on invertebrate macropores. First, macropore density and size distribution was measured at open soil, in direct proximity to perennial grass tussocks and shrubs, at grass dominated, intermediate and shrub dominated sites. Secondly, we recorded macropores on randomly chosen plots along a shrub cover gradient at three points in time within the rainy season. Individual shrubs and the amount of large scale grass cover increased macropore densities. Interestingly, macropore numbers were highest at the beginning of the rainy season. We argue that macropore densities reflect the activity and influence of soil macrofauna on ecosystem functioning, which is greatest at highly heterogeneous vegetation. Rangeland management should aim for high grass cover with scattered shrubs for sustainable soil health, by applying appropriate stocking rates, selectively removing shrubs or reseeding perennial grasses.
英文关键词	Macropores Ecosystem engineers Shrub-encroachment Ecosystem functioning Soil fauna Land degradation
类型	Article
语种	英语
国家	Germany
收录类别	SCI-E
WOS记录号	WOS:000517850300005
WOS关键词	ARTHROPOD DIVERSITY ; ECOSYSTEM ENGINEERS ; SOIL INVERTEBRATES ; SPECIES RICHNESS ; ENCROACHMENT ; TERMITES ; LAND ; COMMUNITIES ; PATTERNS ; IMPACT
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/2XILL650/314883
作者单位	Univ Potsdam, Inst Biochem & Biol, Dept Plant Ecol & Nat Conservat, Muhlenberg 3, D-14476 Potsdam, Germany
推荐引用方式 GB/T 7714	Marquart, Arnim,Geissler, Katja,Heblack, Jessica,et al. Individual shrubs, large scale grass cover and seasonal rainfall explain invertebrate-derived macropore density in a semi-arid Namibian savanna[J],2020,176.
APA	Marquart, Arnim,Geissler, Katja,Heblack, Jessica,Lobas, Christoph,Muench, Elise,&Blaum, Niels.(2020).Individual shrubs, large scale grass cover and seasonal rainfall explain invertebrate-derived macropore density in a semi-arid Namibian savanna.JOURNAL OF ARID ENVIRONMENTS,176.
MLA	Marquart, Arnim,et al."Individual shrubs, large scale grass cover and seasonal rainfall explain invertebrate-derived macropore density in a semi-arid Namibian savanna".JOURNAL OF ARID ENVIRONMENTS 176(2020).