A5078237384- Soil erosion and sediment transport
- Peatlands and Wetlands Ecology
- Soil and Unsaturated Flow
- Plant Water Relations and Carbon Dynamics
- Soil and Water Nutrient Dynamics
- Botany and Plant Ecology Studies
- Landfill Environmental Impact Studies
- Tree-ring climate responses
- Ecology and Vegetation Dynamics Studies
- Groundwater flow and contamination studies
- Lichen and fungal ecology
- Soil Carbon and Nitrogen Dynamics
- Hydrology and Watershed Management Studies
- Rangeland Management and Livestock Ecology
- Soil Geostatistics and Mapping
- Urban Heat Island Mitigation
- Plant Ecology and Soil Science
- Geotechnical Engineering and Soil Stabilization
- Microbial Community Ecology and Physiology
- Forest ecology and management
- African Botany and Ecology Studies
- Marine and environmental studies
- Tree Root and Stability Studies
- Agriculture and Rural Development Research
- Heavy metals in environment
Universität Hamburg
2013-2023
Stellenbosch University
2012
Summary Ammonia‐oxidizing archaea (AOA) play an important role in nitrification and many studies exploit their amoA genes as marker for diversity abundance. We present archaeal consensus phylogeny based on all publicly available sequences (status June 2010) provide evidence the diversification of AOA into four previously recognized clusters one newly identified major cluster. These clusters, which we suggest a new nomenclature, harboured 83 species‐level OTU (using inferred species threshold...
Methane (CH 4 ) emission patterns were investigated at an old landfill in northern Germany during a 2‐year campaign over three different time‐scales (seasonal, daily and diurnal) using modified static chambers. Emissions not uniformly distributed the cover soil, but occurred through localized preferential pathways (hotspots). The range of emissions from 14 hotspots any one measurement event was large, reflecting large spatial variability landfill. In addition, individual showed temporal...
Relationships were sought between infiltrability and the properties of hundreds surface soils (pedoderms) sampled across Namibia western South Africa. Infiltrability was determined using a laboratory method, calibrated against rainfall simulator, which measures passage suspension soil in distilled water through small column packed with same soil. Other EC, pH, water-soluble cations anions, ammonium acetate-extractable cations, organic C, total N, 7-fraction particle size distribution,...
Abstract Questions The S ucculent K aroo is a winter‐rainfall desert in southern A frica with highly diverse flora. Which environmental factors differentiate vegetation composition at the plot level: How can compositional pattern be best represented by formal phytosociological classification. Location Soebatsfontein communal area and surroundings N amaqualand H ardeveld B ioregion of iome, orthern C ape P rovince, outh frica. Methods We recorded vascular plant species composition, together...
Although climate change is expected to increase the extent of drylands worldwide, effect drought on soil microbiome still insufficiently understood as for dominant but little characterized phyla like Acidobacteria. In present study active acidobacterial communities Namibian soils differing in type, physicochemical parameters, and land use were by high-throughput sequencing. Water content, pH, major ions nutrients distinct sandy soils, woodlands or dry agriculture loamy sands. Soils...
Growth conditions at urban street-tree sites are unfavorable and tree vitality is increasingly threatened by water scarcity due to changing climate. Developing adaption management strategies ensure early stage long-term tree- root growth requires thorough knowledge about zone soil-water dynamics young sites. Therefore, we established a soil potential (SWP) monitoring 17 in the city of Hamburg, Germany. Over four years (2016–2019) measured quantified critical availability ball, planting pit,...
In parts of Angola, Namibia and South Africa the sparse vegetation at margin Namib Desert is often dotted with roughly circular bare patches. The origin these “fairy circles” (FC) subject an ongoing debate. a recent article in PPEES, Getzin et al. (2022) provided assessments grasses termites combined soil moisture measurements, near to fairy circles several areas Namibia. their interpretation they state that termite herbivory not causing this grass death as plants had undamaged roots....
Abstract Although the qualities of river water and sediments Elbe have greatly improved over past twenty years, both suspended matter are still contaminated with heavy metals arsenic (HM). This contamination exceeds action values specified in Federal Soil Protection Contaminated Sites Ordinance (BBodSchV). The status floodplain soil HM along entire German alluvial was investigated evaluated, based on former research activities recently performed analyses after extreme flood event August 2002...
The influence of soil nutrients on woody plants is poorly understood. Are trees – fire and other disturbance factors being equal generally promoted by nutrient‐rich or nutrient‐poor soils? To determine the edaphic parameters controlling cover, we sampled soils summed extent crowns tall shrubs 364 plots at 20 sites in Namibia adjacent South Africa, ranging from desert lichen‐fields to caesalpiniaceous woodland with associated mean annual rainfall 11 mm 535 mm. Our analysis included...
Urban soils' variability in the vertical direction presumably affects hydrological parameters at timescale. Moreover, horizontal soil alterations small spatial scales are common urban areas. This spatio-temporal and heterogeneity of moisture possible influencing factors were to be described quantified, using data a monitoring network city Hamburg, Germany. Soil from ten observation sites within project HUSCO was evaluated for two different years. The located districts with mean groundwater...
Abstract The resuspension of sediment leads to an increased release nutrients and organic substances into the overlying water column, which can have a negative effect on oxygen budget. Especially in warmer months with lower saturation higher biological activity, content reach critical thresholds estuaries like upper Elbe estuary. Many studies dealt nutrient fluxes that occur during event. However, properties influence consumption potential (OCP) different biochemical processes not been...