Arid
DOI10.1016/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
Corresponding AuthorMarquart, Arnim
JournalJOURNAL OF ARID ENVIRONMENTS
ISSN0140-1963
EISSN1095-922X
Year Published2020
Volume176
Abstract in English

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.


Keyword in EnglishMacropores Ecosystem engineers Shrub-encroachment Ecosystem functioning Soil fauna Land degradation
SubtypeArticle
Language英语
CountryGermany
Indexed BySCI-E
WOS IDWOS:000517850300005
WOS KeywordARTHROPOD DIVERSITY ; ECOSYSTEM ENGINEERS ; SOIL INVERTEBRATES ; SPECIES RICHNESS ; ENCROACHMENT ; TERMITES ; LAND ; COMMUNITIES ; PATTERNS ; IMPACT
WOS SubjectEcology ; Environmental Sciences
WOS Research AreaEnvironmental Sciences & Ecology
Document Type期刊论文
Identifierhttp://119.78.100.177/qdio/handle/2XILL650/314883
AffiliationUniv Potsdam, Inst Biochem & Biol, Dept Plant Ecol & Nat Conservat, Muhlenberg 3, D-14476 Potsdam, Germany
Recommended Citation
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).
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