Rangeland Ecology & Management
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- Library Collection RecordThe estimation of near surface air temperature (Ta) is useful for a wide range of applications such as agriculture, climate related diseases and climate change studies. Air temperature is commonly…Publication Date 2010
- Land surface temperature
- air temperature
- accuracy assessment
- MODIS
- remote sensing
- modelling
- climate change
- agriculture
- temperature
- disease
- Africa
- Library Collection RecordThe remote sensing of fire severity is a noted goal in studies of forest and grassland wildfires. Experiments were conducted to discover and evaluate potential relationships between the…Publication Date 2005
- Fire severity
- savannah
- Surface reflectance
- Char
- nitrogen
- carbon
- Burn severity index
- Linear and non-linear spectral unmixing
- Elemental emission factor
- savanna
- fire ecology
- GIS
- remote sensing
- grasslands
- modelling
- Africa
- Library Collection RecordThe remote sensing of Earth surface changes is an active research field aimed at the development of methods and data products needed by scientists, resource managers, and policymakers. Fire is a…Publication Date 2005
- fire
- Fire-affected area
- Burned area
- change detection
- BRDF
- MODIS
- Time series
- remote sensing
- mapping
- modelling
- Africa
- Library Collection RecordSoil moisture is important information in semiarid rangelands where vegetation growth is heavily dependent on the water availability. Although many studies have been conducted to estimate moisture in…Publication Date 2004
- soil moisture
- TM imagery
- ERS-2 imagery
- rangelands
- remote sensing
- modelling
- NDVI values
- Africa
- Library Collection RecordThe lack of information on the vegetation status before the use of fire as a management tool in protected areas leads to drastic destruction of the natural vegetation and biodiversity. This paper…Publication Date 2004
- fire risk
- savanna
- LANDSAT-ETM
- Tasseled Cap
- simulation
- national park
- Senegal
- fire
- hazard assessment
- management
- national parks
- modelling
- remote sensing
- Africa
- Library Collection RecordIn arid and semi-arid areas, total evaporation is a major component of the hydrological cycle and seasonal water shortages and drought are common. In these areas, the role of land use and land use…Publication Date 2004
- Green water
- Blue water
- Hydrological model
- land use change
- land use
- management
- non-grazing resources
- rainfall
- hydrology
- modelling
- Africa
- Library Collection RecordPollen records from Lake Malawi, Africa spanning the last 135 160;kyr show substantial and abrupt vegetation response to multiple episodes of extreme aridity between 135 and 75 160;ka. Peaks in both…Publication Date 2011
- pollen
- vegetation
- Pleistocene
- Paleoclimate
- East Africa
- Library Collection RecordAccurate reconstructions of past hydrological variability are essential for understanding the climate history of the tropics. In tropical Africa, the relative proportion of vegetation utilizing the…Publication Date 2009
- vegetation
- n-alkane
- Lignin phenol
- Compound-specific carbon isotope
- Paleoclimate
- East Africa
- Library Collection RecordExisting projections of the optimal share of carbon sequestration in an overall portfolio of greenhouse-gas mitigation strategies almost all assume the carbon price to be constant over time. This…Publication Date 2005
- climate change
- carbon sequestration
- forestry
- Carbon price
- Integrated assessment models
- greenhouse gases
- Economic Aspects
- modelling
- Africa
- Library Collection RecordMany researchers have used time-series analysis of remotely sensed images to gain understanding of the dynamics of loss of vegetation cover in drylands. However, complex interactions between…Publication Date 2010
- Loss of vegetation
- Mixed-effects
- NDVI
- remote sensing
- modelling
- NDVI values
- vegetation dynamics
- climate
- rainfall
- soils
- land use
- Somalia
- Ethiopia
- Africa
- Library Collection RecordThis paper reviews the predictions and management implications of two current paradigms in the ecology and management of arid and semi-arid rangelands. The equilibrium model stresses the importance…Publication Date 2005
- range condition
- overgrazing
- key resources
- rainfall variability
- heterogeneity
- Scale dependence
- Mobility
- management
- ecology
- rangelands
- modelling
- rangeland condition
- rainfall
- livestock
- stocking rates
- vegetation dynamics
- Africa
- Library Collection RecordLocal communities use an indigenous classification of environmental land units for natural resource management in central north Namibia. These indigenous land units (ILUs) were compared with a…Publication Date 2005
- Indigenous environmental knowledge
- vegetation
- ordination
- land classification
- Resource Use
- grazing
- Indigenous knowledge
- community based resource management
- management
- ecology
- vegetation dynamics
- Africa
- Library Collection RecordFires threaten human lives, property and natural resources in Southern African savannas. Due to warming climate, fire occurrence may increase and fires become more intense. It is crucial, therefore,…Publication Date 2009
- Burned area estimation
- Fire probability
- GLM
- Hierarchical partitioning
- logistic regression
- MODIS fire data
- spatial autocorrelation
- fire ecology
- savanna
- modelling
- climate change
- GIS
- East Caprivi
- Namibia
- Africa
- Library Collection RecordInterpolated rain-gauge data were compared to Meteosat-based precipitation estimates for sub-Saharan Africa. Validation was carried out using a dataset from a very dense gauge network in South Africa…Publication Date 2009
- precipitation
- Block kriging
- Indicator kriging
- Meteosat
- FEWS
- rainfall
- remote sensing
- satellite imagery
- modelling
- runoff
- soil erosion
- Sub-Saharan Africa
- Library Collection RecordThe Phanerozoic has witnessed major changes, with Africa being an integral part of supercontinental landmass agglomeration forming Gondwana, its amalgamation with smaller landmasses to form Pangaea,…Publication Date 2005
- Africa
- climate
- evolution
- flora
- Gondwana
- history
- Madagascar
- Phanerozoic
- plants
- Review
- vegetation
- Africa
- Library Collection RecordTheoretical models predict that the relative importance of facilitation and competition may vary inversely across gradients of abiotic stress. However, these predictions have not been thoroughly…Publication Date 2010
- abiotic stress
- competition
- facilitation
- Herbaceous Species
- Tree
- plant autecology
- biodiversity
- savanna
- rainfall
- modelling
- North Africa
- Library Collection RecordThe need to implement sustainable resource management regimes for semi-arid and arid rangelands is acute as non-adapted grazing strategies lead to irreversible environmental problems such as…Publication Date 2009
- adaptation
- climate change
- Arid rangelands
- Namibia
- Bio-economic simulation approach
- land use
- sustainability
- management
- socio-economic aspects
- grazing
- modelling
- ecology
- savanna
- stocking rates
- decision support systems
- vegetation dynamics
- Namibia
- Africa
- Library Collection RecordTwo long-term mechanistic models of grazing systems in the semi-arid succulent Karoo have been used to study factors that influence vegetation changes, livestock productivity and sustainability of…Publication Date 2005
- Rangeland dynamics
- Semi-arid regions
- Vegetation Change
- Goat production
- goats
- sheep
- rainfall
- rangelands
- vegetation dynamics
- modelling
- diet selection
- Africa
- Library Collection RecordForests and savannas are the major ecotypes in humid tropical regions. Under present climatic conditions, forest is in a phase of natural expansion over savanna, but traditional human activities,…Publication Date 2004
- Forest-savanna ecotone
- Stochastic model
- cellular automata
- fire
- seed dispersal
- modelling
- grasslands
- Africa
- Library Collection RecordA model of a plant community that is biologically reasonable and easily adaptable to economic models is presented. The model includes optimization, competition, stochastic limiting resources, and…Publication Date 2005
- plant competition
- redundancy
- invasive species
- Individual optimization
- management
- ecosystem ecology
- rangelands
- modelling
- indigenous encroaching species
- Alien invasive species
- Phytosociology
- Africa
- Library Collection RecordBasin sediment yield is the product of all sediment producing processes and sediment transport within a basin. Consequently, the prediction of basin sediment yield should take into consideration all…Publication Date 2005
- modelling
- sediment yield
- soil erosion
- Sediment delivery
- scale
- Mediterranean
- Africa
- Library Collection RecordIn African savannahs, large trees improve grass quality, particularly in dry and nutrient poor areas. Enhanced below-canopy grass nutrients, such as nitrogen and phosphorus contents should therefore…Publication Date 2009
- canopy
- feeding preferences
- Fibre
- Grass quality
- Grazer
- herbivores
- linear programming
- nitrogen
- nutrients
- phosphorus
- savanna
- forage quality
- grazing
- animal nutrition
- modelling
- Africa
- Library Collection RecordSpatially explicit land use/cover models are indispensable for sustainable rural land use planning, particularly in southern African countries that are experiencing rapid land use/cover changes.…Publication Date 2009
- Land use/cover change
- Multicriteria evaluation (MCE)
- Multi-objective land allocation (MOLA)
- Markov-cellular automata model
- land use
- modelling
- remote sensing
- mapping
- degradation
- rural areas
- Zimbabwe
- Africa
- Library Collection RecordClimate change impacts on agriculture could arguably be most critical for developing countries in tropical regions: their populations rely importantly on agriculture and climate-dependant resources,…Publication Date 2012
- climate change
- agriculture
- impacts
- tropics
- C4 crops
- plant production
- precipitation
- modelling
- subsistence agriculture
- food security
- Africa
- Library Collection RecordSavanna grass cover is dynamic and its annual extent resonates with wet season rainfall, as shown by satellite observations of normalized difference vegetation index (NDVI) time series for the…Publication Date 2005
- savanna
- precipitation
- Satellite
- NDVI
- grass
- ecohydrology
- rainfall
- NDVI values
- vegetation dynamics
- soil moisture
- modelling
- grasslands
- Africa
- Library Collection RecordLandscapes commonly comprise of mosaics, patches and boundaries. Riparian boundaries are complex to delineate and characterize, with a multitude of variables available for delineation. Multiple…Publication Date 2009
- Boundary
- vegetation
- Delineation
- Kruger National Park
- national parks
- vegetation dynamics
- ecology
- Kruger National Park
- South Africa
- Library Collection RecordThis paper describes methods to couple the reflectance-resistance model developed in Paper I with the normalized difference vegetation index (NDVI) data from the advanced very high resolution…Publication Date 1995
- NDVI values
- remote sensing
- rainfall
- drought
- modelling
- grasslands
- pollution
- Africa
- Library Collection RecordAn analysis tool was developed to simulate primary productivity and crop yields for both present and possible future climate conditions. Southern Africa was delineated into 712 relatively homogeneous…Publication Date 1993
- plant production
- agriculture
- climate change
- soil
- vegetation dynamics
- hydrology
- modelling
- GIS
- rainfall
- socio-economic aspects
- policies
- food security
- Africa
- Library Collection RecordNo abstract availablePublication Date 1995
- ecosystem dynamics
- degradation
- savanna
- modelling
- Africa
- Library Collection RecordNo abstract availablePublication Date 1992
- rangelands
- modelling
- decision support systems
- Africa
- Library Collection RecordThree years of weekly measurements of surface runoff and sediment yield from two small plots in a dune terrain along the Dutch coast have been used to model water erosion. The measurements of the…Publication Date 1991
- runoff
- rainfall
- erosion
- modelling
- Soil Condition
- Africa
- Library Collection RecordDevelopment and use of crop growth simulation models has increased in the last decades. Most crop growth models require daily weather data as input values. These data are not easy to obtain and…Publication Date 1994
- agriculture
- modelling
- plant production
- data analysis
- climate
- Africa
- Library Collection RecordA utilitarian simulation model of botanical composition of ruminant diets on rangelands is proposed. It emphasizes the use of forage resource diversity within the range ecosystem context. The forage…Publication Date 1993
- modelling
- Forage Quantity
- rangelands
- species richness
- biodiversity
- cattle
- forage quality
- livestock
- grazing
- ecology
- Africa
- Library Collection RecordA conceptual model of the pastoral production system within the arid, winter rainfall shrublands of Western Australia is described. The building blocks of this model are pasture-type models which are…Publication Date 1991
- modelling
- plant production
- animal production
- soils
- pasture management
- Africa
- Library Collection RecordA mathematical model is presented of the subsistence pastoral system on the Makatini Flats surrounding the Pongola floodplain just south of the Mozambique border in north-eastern South Africa. The…Publication Date 1990
- modelling
- management
- subsistence agriculture
- pastoralism
- land use
- grazing
- irrigation
- Africa
- Library Collection RecordThe SPUR (simulation of production and utilization of rangelands) model was evaluated for use on eastern hill land pastures. The model was calibrated using the first year of soil fertility, weather,…Publication Date 1990
- rangelands
- Soil Condition
- cattle
- modelling
- animal production
- plant production
- Africa
- Library Collection RecordPreviously described forage and beef models were used to investigate the biological productivity of continuous (CG) and rotational grazing (RG) systems on common bermudagrass (Cynodon dactylon (L.)…Publication Date 1989
- cattle
- foraging ecology
- modelling
- animal production
- management
- stocking rates
- grazing
- grasslands
- Africa
- Library Collection RecordA mathematical model is presented of the regional cattle herd within a subsistence pastoral system, in a semi-arid region, where empirical data on herd production are restricted to a few basic…Publication Date 1985
- modelling
- Economic Aspects
- cattle
- subsistence agriculture
- pastoralism
- stocking rates
- Africa
- Library Collection RecordA model of kleingrass (Panicum coloratum L.) growth and utilization by steers is presented. The model included stochastic inputs of climatological characteristics, water retention at different soil…Publication Date 1984
- modelling
- cattle
- grazing
- grasslands
- animal nutrition
- plant production
- stocking rates
- decision support systems
- Africa
- Library Collection RecordA forage model and a cattle production model were interfaced and adapted for tropical production conditions in East Africa. The objectives of the modelling were to structure and conceptualise a…Publication Date 1981
- modelling
- cattle
- animal production
- management
- grazing
- communal farming
- policies
- Africa
- Library Collection RecordRainfall variability and stocking rate in extensive ranching regions in the Northwestern Transvaal, South Africa, can have substantial influence on feed availability per animal and thus on beef…Publication Date 1979
- rainfall
- stocking rates
- rangelands
- animal nutrition
- animal production
- modelling
- Economic Aspects
- Africa
- Library Collection RecordAlien plants invade many ecosystems worldwide, often having substantial negative effects on ecosystem structure and functioning. The apparent complexity of invasions has impaired the development of a…Publication Date 1996
- biological invasions
- Model comparison
- Plant dispersal
- Alien invasive species
- modelling
- management
- decision support systems
- ecosystem ecology
- Africa
- Library Collection RecordSPUR (Simulation of Production and Utilization of Rangelands) is a physically-based model designed to simulate the complexity of rangeland ecosystems (Wight and Skiles, 1987). Results of extensive…Publication Date 1996
- model evaluation
- Rangeland ecosystems
- Spur
- modelling
- management
- soils
- temperature
- livestock
- Africa
- Library Collection RecordThe role of empiricism in predicting mean annual primary production at the mesoscale is demonstrated through development of a simple model (RESAP) for application over all land surfaces within a…Publication Date 1993
- savanna
- modelling
- plant production
- mapping
- agriculture
- Africa
- Library Collection RecordThis paper describes the development and initial validation of a simulation model designed to predict patterns of landscape use by cattle as a function of environmental conditions and spatial…Publication Date 1992
- modelling
- cattle
- landscape ecology
- animal impact
- grazing
- water use efficiency
- temperature
- Africa
- Library Collection RecordA plant growth model has been developed as a component of a general rangeland production and utilization model (SPUR). The carbon and nitrogen content of standing green, live roots, propagules,…Publication Date 1988
- modelling
- rangelands
- animal production
- plant production
- management
- Africa
- Library Collection RecordNine plant growth models for grassland ecosystems were examined. Model objectives, complexity and inclusiveness were compared. A large degree of diversity in model complexity and structure exists in…Publication Date 1985
- grasslands
- modelling
- ecosystem dynamics
- grazing
- Africa
- Library Collection RecordThe responses of East African grasses to defoliation at specific heights and frequencies were simulated mathematically over a single optimal growing season. The simulation model used morphological…Publication Date 1984
- plant production
- grazing
- plant autecology
- modelling
- Africa
- Library Collection RecordA model of litter decomposition in a South African savanna is described. Decomposing material is divided into a number of particle classes, distinguishing material of different ages, origins and size…Publication Date 1982
- ecology
- grasslands
- modelling
- ecosystem dynamics
- insects
- system ecology
- Africa
- Library Collection RecordAgricultural development is a complex undertaking because of the numerous factors involved, including those of a physical and non-physical nature. Land and water have often been (and are nowadays…Publication Date 1974
- agriculture
- land use
- management
- hydrology
- modelling
- Africa