A5010051280- Geographic Information Systems Studies
- Wildlife Ecology and Conservation
- Geography Education and Pedagogy
- Land Use and Ecosystem Services
- Species Distribution and Climate Change
- Ecology and Vegetation Dynamics Studies
- Ecology, Conservation, and Geographical Studies
- Plant and animal studies
- Data Management and Algorithms
- Conservation, Biodiversity, and Resource Management
- Atmospheric chemistry and aerosols
- Plant responses to elevated CO2
- Atmospheric and Environmental Gas Dynamics
- Remote Sensing in Agriculture
- 3D Modeling in Geospatial Applications
- Botany and Plant Ecology Studies
- Remote Sensing and LiDAR Applications
- Data Visualization and Analytics
- Insect and Arachnid Ecology and Behavior
- Plant Ecology and Soil Science
- Remote-Sensing Image Classification
- ICT in Developing Communities
- Educational Tools and Methods
- Environmental Education and Sustainability
- Climate Change Communication and Perception
Karlsruhe University of Applied Sciences
2013-2024
Karlsruhe University of Education
2015
Alpenforschungsinstitut (Germany)
2001
Nürtingen-Geislingen University of Applied Science
1999
Understanding the causes and effects of species invasions is a priority in ecology conservation biology. One crucial steps evaluating impact invasive to map changes their actual potential distribution relative abundance across wide region over an appropriate time span. While direct indirect remote sensing approaches have long been used assess invasion plant species, animals mainly based on methods that rely environmental proxies conditions suitable for colonization by particular species. The...
Forest fragmentation and selective logging are two main drivers of global environmental change modify biodiversity conditions in many tropical forests. The consequences these changes for the functioning forest ecosystems have rarely been explored a comprehensive approach. In Kenyan rainforest, we studied six animal-mediated ecosystem processes recorded species richness community composition all animal taxa involved processes. We used linear models formal meta-analysis to test whether...
Introduction With urbanization and industrialization in the developing world, urban peri-urban agriculture is increasingly contributing to food systems, employment, income generation opportunities. However, may release harmful pollutants, including heavy metals trace elements into agricultural soils, posing ecological, environmental public health concerns. This paper assessed potential risks of soil contamination with farmlands Nairobi city catchment Kenya. Methods A total 60 samples were...
Abstract Biodiversity in tropical rainforests is heavily influenced by land use/cover change (LUCC), but so far there have been few LUCC studies conducted Africa. We present several methods that make use of remotely sensed data and landscape metrics allow for assessment the development cover thus forest fragmentation disturbance over a substantial period time. The study covers Kakamega Forest its associated areas western Kenya, last 30 years. accuracy supervised multispectral classification...
ABSTRACT Fruiting trees in degraded areas are attractive for frugivorous birds and may become centers of regeneration. However, a number tree species exotic species. Thus, the question arises whether these can also act as foci forest In farmland adjacent to Kakamega Forest, Kenya, we investigated frugivore assemblage in, seed rain seedling establishment under, 29 fruiting guava ( Psidium guajava ) at different distances forest. The results show that 40 bird visited trees. All 82 percent...
Abstract A means of deriving a disturbance index reflecting forest use history is demonstrated here to establish gradient and enable comparison different areas within across individual forests. Detailed reference made Kakamega Forest in western Kenya for which long‐term time series has been established, although the study spread four further forests Uganda. wide variety sources are drawn upon spatially resolved data that integrated geographic information system. Three indices derived:...
Combining spatially explicit land cover data from remote-sensing and faunal field observations is increasingly applied for landscape-scale habitat biodiversity assessments, but without modelling changes quantitatively over time. In a novel approach, we used long-term time series including historical map to predict the influence of one century tropical forest change on keystone species or indicator groups in Kakamega–Nandi forests, western Kenya. Four steps between 1912/13 2003, derived...
Sensitivity studies for simulations of yearly cycles and terrain effects are presented the St.‐Martin‐de‐Londres region (southern France). Potential isoprenoid emissions simulated using Solar Radiation Model (SORAM), spatial complex terrain, photosynthetically active radiation, surface temperature. SORAM is embedded in a geographic information system (GIS) environment considers digital elevation model (DEM) domain. Compared to maximum case (i.e., no variation emission factors leaf area index...
For the region St‐Martin‐de‐Londres (southern France), information on vegetation formations is available for 5 different years between 1946 and 1979. Isoprenoid emission factors are assigned according to dominant plant species that were related formations. Potential isoprenoid emissions simulated with help of Solar Radiation Model (SORAM) considering spatial effects complex terrain as well temporal photosynthetically active radiation surface temperature, main controlling parameters biogenic...
Although climate change is highly prevalent in the media, people Europe and United States are often unsure about terms, processes, its personal consequences. In other words, communication seems to be largely failing so far. Among tools, maps widely used for explanatory purposes by scientists media. Here two questions arise: first, whether high map complexity may too intricate understood discourage from deciphering map; second, interest can influenced phenomenon depicted or map's scale. a...
Abstract Knowledge on cheetah population densities across their current range is limited. Therefore, new and efficient assessment tools are needed to gain more knowledge species distribution, ecology behaviour. Scat detection dogs have emerged as an non-invasive method monitor elusive vulnerable animal species, like cheetahs, due the dog’s superior olfactory system. However, success of locating scat using can be significantly improved under suitable weather conditions. We examined impact...
Maps have been used for centuries to depict the diverse facets of our environment. Thematic maps a specific theme and help in revealing geospatial patterns relations. The study practice map making has led established cartographic design rules. Ever increasing availability high-quality data coupled with continuously changing technologies imply that one find right mix between age-old principles state-of-the-art trends when teaching thematic cartography. This paper presents proposal on how...
Water scarcity is among the many problems faced today by countries in world, especially African countries. The Kakamega area western Kenya known for plenty of rainfall (around 2000 mm annually), however, rainwater harvesting (RHW) from roofs not yet a common practice region. In this study, we determined potential RWH as an alternative or preferred source safe water domestic use. Spatial modelling techniques using amount rainfall, census data and detailed information available classification...
Today, graduates seek employment in a global marketplace, regardless of the country which they studied. Comparing academic programs helps students, academics and employers to make informed decisions about study options, program offerings recent graduates. In this study, we juxtapose geospatial technologyrelated at three universities located Europe, Africa America. Initially, authors contributed information these through questionnaire comprising several open-ended questions origins...
Abstract Large‐scale modifications of natural ecosystems lead to mosaics natural, semi‐natural and intensively used habitats. To improve communication in conservation planning, managers other stakeholders need spatially explicit projections at the landscape scale future biodiversity under different land‐use scenarios. For that purpose, we visualized potential effect five forest management scenarios on avifauna Kakamega Forest, western Kenya using measures bird diversity GIS data. Future...