A5031300733- Insect and Arachnid Ecology and Behavior
- Plant and animal studies
- Geology and Paleoclimatology Research
- Clay minerals and soil interactions
- Ecology and Vegetation Dynamics Studies
- Soil and Unsaturated Flow
- Earth Systems and Cosmic Evolution
- Tree Root and Stability Studies
- Geochemistry and Geologic Mapping
- Soil Geostatistics and Mapping
- Isotope Analysis in Ecology
- Groundwater and Isotope Geochemistry
- Geophysical and Geoelectrical Methods
- Soil erosion and sediment transport
- Interdisciplinary Research and Collaboration
- Evolution and Paleontology Studies
- Bioeconomy and Sustainability Development
- Aeolian processes and effects
- Therapeutic Uses of Natural Elements
- Plant responses to elevated CO2
- Pleistocene-Era Hominins and Archaeology
- Plant pathogens and resistance mechanisms
- Pasture and Agricultural Systems
- Geotechnical and construction materials studies
- Rangeland Management and Livestock Ecology
Stellenbosch University
2007-2024
Robert Bosch (Germany)
2014
Universitat de Lleida
2012
Abstract Oxalic acid is one of the most abundant organic acids produced by plants. Much global production oxalic deposited on soil surfaces in leaf litter to be oxidized microorganisms, resulting a pH increase and shifting carbonate equilibria. In what known as oxalate-carbonate pathway, calcium oxalate metabolism results CO2 being sequestered into soils insoluble calcite (CaCO3). There growing appreciation that scale this process sufficiently large an important contribution carbon turnover...
Ecosystems that offer carbon sequestration by leaching bicarbonate to groundwater are valuable natural capital. One region may this service is the west coast of South Africa. Over 20 % covered soil mounds ("heuweltjies") up 40 m diameter, 2 high, inhabited southern harvester termite Microhodotermes viator and enriched in organic inorganic soluble minerals. We aimed generate radiogenic stable isotope data for soils a where these absent, 1) verify atmosphere-soil-groundwater link, 2) resolve...
Termites are keystone species in natural ecosystems and their role the C cycle is potentially substantial but poorly understood. Large (20–40 m) mounds (heuweltjies) of harvester termite Microhodotermes viator occupy up to a quarter semi-arid west coast region South Africa storage potential unknown. This study determined organic inorganic fractions, stocks, correlation with each other, depth, biogenic features these mounds. Trenches (30–60 were excavated through 3 mounds: Buffels River...
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Indurated, light-coloured 'sepiocrete' horizons have been found in Namaqualand Calcisols and Durisols. These resembled calcrete but were non- to only mildly calcareous, resisted slaking acid alkali, often broke with a conchoidal fracture. The presence of elevated quantities sepiolite the bulk-soil was confirmed by XRD analysis. degree induration some these suggested cementation silica, so this paper properties, bulk chemistry, mineralogy micromorphology are compared typical silica-cemented,...
Soil organic matter (OM) is a source of fertility for food provisioning and means climate mitigation. A high pedodiversity observed over very short distances due to both past present land use, such as in Western Africa (Northern Togo), makes this crucial issue. In particular, some small spots covered by sacred forests (forêts sacrées) cultural value area are extremely biodiverse, calcareous OM contrast with the non-calcareous, poor OM, overgrazed woody savannah agricultural surroundings. The...
Quantification of oxalate salts in soil clay minerals is necessary to study biogeochemistry, but existing analytical techniques are expensive and time-consuming. We aim develop an efficient attenuated total reflectance mid-infrared (MIR) spectroscopic technique quantify a mineral matrix. calibrated MIR models for analysis anion concentrations standard solutions (0–0.01 M) by using partial least-squares regression algorithm. were also developed sodium (NaOx) calcium (CaOx) content mixtures...
Ecosystems that offer carbon sequestration by leaching bicarbonate to groundwater are valuable natural capital. One region may this service is the west coast of South Africa. Over 20% covered soil mounds (“heuweltjies”) up 40 m diameter, 2 high, inhabited southern harvester termite Microhodotermes viator and enriched in organic inorganic soluble minerals. We aimed generate radiogenic stable isotope data for soils a where these absent, 1) verify atmosphere-soil-groundwater link, 2) resolve...