Rangeland Ecology & Management
Get reliable science
Toggle Search
Result Type
Collection
Keywords
Document Type
Displaying 151 - 200 of 307 results
- Library Collection RecordVegetation mapping of plant communities at fine spatial scales is increasingly supported by remote sensing technology. However, combining ecological ground truth information and remote sensing…Publication Date 2010
- cluster analysis
- Redundancy analysis
- Multivariate
- Supervised fuzzy c-means
- semiarid
- rangelands
- Namibia
- imaging spectroscopy
- remote sensing
- mapping
- vegetation dynamics
- Namibia
- Africa
- Library Collection RecordThere is a pressing need for an objective, repeatable, systematic and spatially explicit measure of land degradation. In northeastern South Africa (SA), there are large areas of the former homelands…Publication Date 2004
- land degradation
- NDVI values
- rangelands
- South Africa
- degradation
- land use
- remote sensing
- rainfall
- ecosystem ecology
- Africa
- Library Collection RecordA new integrated approach, involving continuum-removed absorption features, the red edge position and neural networks, is developed and applied to map grass nitrogen concentration in an African…Publication Date 2004
- Hymap imagery
- Absorption features
- Continuum removal
- red edge position
- Foliar nitrogen concentration
- Savanna rangelands
- savanna
- rangelands
- mapping
- plant production
- grasslands
- forage quality
- remote sensing
- conservation
- national parks
- 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 RecordPollen analysis of a 12.8-m-long core (R96-I) from the southern basin of Lake Rukwa (Tanzania, 8°S, 33°E, 793 m a.s.l.) provides new information on the vegetation history of central eastern Africa…Publication Date 2005
- palaeobotany
- pollen
- Late Quaternary
- southern Tanzania
- vegetation dynamics
- lake levels
- climate change
- Africa
- Library Collection RecordAbstract Woody plant encroachment is a common consequence of disturbance in savannas. Grazers and browsers interfere with sapling establishment dynamics by direct consumption of plant tissue,…Publication Date 2013
- Acacia
- browsing
- grazing
- mesic savanna
- tree sapling biomass
- woody plant encroachment
- indigenous encroaching species
- savanna
- soil nutrients
- ecosystem ecology
- vegetation dynamics
- South Africa
- Library Collection RecordA distributed GIS-based hydrological model is developed using GIS and computational hydrology techniques. The model is based on water balance consideration of the surface and subsurface processes.…Publication Date 2003
- Water balance model
- GIS
- Regional hydrology
- southern Africa
- runoff
- soil moisture
- Evapo-transpiration
- ecosystem ecology
- vegetation dynamics
- Africa
- Library Collection RecordThe feeding behaviour of Xhosa lop-eared (XLE), Nguni (NGN) and Nguni x Boer crossbred (NBC) goat genotypes was compared in a False Thornveld rangeland by recording time spent on browsing, grazing…Publication Date 2011
- rangelands
- foraging
- goats
- South Africa
- Library Collection RecordAnthropogenic fires in Africa are an ancient form of environmental disturbance, which probably have shaped the savanna vegetation more than any other human induced disturbance. Despite anthropogenic…Publication Date 2005
- Anthropogenic fires
- Bush encroachment
- Indigenous knowledge of herders
- fire history
- Namibia
- savanna
- Scale dependence
- species richness
- vegetation trends
- fire ecology
- disturbance
- management
- vegetation dynamics
- landscape ecology
- 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 RecordEstablishment of seasonal grazing enclosures has become an important rangeland rehabilitation strategy in semi-arid regions. This study assessed the impact of enclosure age and enclosure management…Publication Date 2010
- cover
- degradation
- Private land ownership
- seed mixtures
- standing crop
- Stock control
- rangelands
- rehabilitation
- animal impact
- communal farming
- biodiversity
- commercial agriculture
- plant production
- monitoring
- Kenya
- Africa
- Library Collection RecordThe issue of sustainability and productivity of open communal rangelands compared to fenced rangelands is often subject to controversy. This study investigated differences in soil and grass layer…Publication Date 2010
- game
- livestock
- Lowveld
- overgrazing
- stocking rates
- grazing
- sustainability
- management
- Soil Condition
- commercial agriculture
- communal farming
- rangelands
- vegetation dynamics
- plant production
- soil fertility
- Swaziland
- Africa
- Library Collection RecordThis paper describes a manual-style Decision Support System that integrates land degradation indicators with adaptive management options and is designed for land managers to easily collect data and…Publication Date 2010
- innovations
- land degradation
- Manual
- monitoring
- participation
- rangelands
- degradation
- decision support systems
- management
- sustainability
- subsistence agriculture
- pastoralism
- Africa
- Library Collection RecordMonitoring cattle inflows and outflows over time is a good indicator of herd productivity. In this study, ninety households were monitored for a year to determine the effect of season, rangeland type…Publication Date 2009
- Cattle sales
- Herd dynamics
- Household consumption
- mortality
- cattle
- Economic Aspects
- rangelands
- animal production
- South Africa
- Library Collection RecordWe detail the impact of abandoned traditional settlements (or bomas) on plant and nutrient succession in the Amboseli ecosystem, southern Kenya, over the course of a century. Plant and soil data were…Publication Date 2009
- biomass
- Nutrient hotspots
- pastoralism
- patch dynamics
- species richness
- wildlife
- Abandoned lands
- soil fertility
- vegetation dynamics
- savanna
- Africa
- Library Collection RecordA great many debates have grown up around the notion of desertification as a process of degradation that affects the arid, semi-arid and sub-humid zones of the globe. A fundamental and continuing…Publication Date 2005
- desertification
- Paradigms
- climate
- rangeland ecology
- Livelihoods approach
- environmental policy
- rangelands
- policies
- land use
- ecology
- socio-economic aspects
- 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 RecordIt is known that, depending on the degree of degradation, the vegetation recovery of severely degraded areas by means of natural succession processes is very slow, if not impossible, and that active…Publication Date 2005
- degradation
- Restoration technologies
- Over-sowing
- Rip-plough cultivation
- Karoo
- monitoring
- restoration ecology
- vegetation dynamics
- management
- germination
- seeds
- seed banks
- Africa
- Library Collection RecordIn evolutionary time frames, grazing by domesticated livestock on the short grass plains of East Africa is a new occurrence resulting in increased animal densities year around and modification to…Publication Date 2005
- evolutionary history of grazing
- Modified-Whittaker plots
- Serengeti ecosystem
- East Africa
- seasonal grazing
- rangelands
- savanna
- grazing
- biodiversity
- vegetation dynamics
- management
- livestock
- animal impact
- Africa
- Library Collection RecordThe seasonal trend in root mass, root distribution with depth and root/shoot ratios along a degradation gradient were quantified over a 2 year period (2000/01 and 2001/02 growing seasons) for a semi-…Publication Date 2005
- rangeland condition
- rangelands
- water use efficiency
- plant production
- degradation
- Africa
- Library Collection RecordThe short-term (2 years) influence of fire burning with the wind (head fire) and against the wind (back fire) on the productivity (above-ground phytomass and litter) and fire behaviour were…Publication Date 2004
- Above-ground phytomass production
- Back and head fires
- basal cover
- fuel load
- litter
- fire ecology
- rangeland condition
- rangelands
- plant production
- rainfall
- Africa
- Library Collection RecordRemote sensing of grass quantity is important for providing information about the productivity and functioning of rangelands. Existing indices used to estimate grass quantity, such as normalized…Publication Date 2004
- NDVI saturation
- Band depth indices
- Greenhouse experiment
- Continuum removal
- bootstrapping
- remote sensing
- forage quality
- rangeland condition
- grasslands
- plant production
- vegetation dynamics
- NDVI values
- Africa
- Library Collection RecordDegradation in Sneeuberg Region of the central Karoo, South Africa, is characterized by the development of badlands on the footslopes of upland areas and by gully systems in valley bottoms. Evidence…Publication Date 2009
- land degradation
- soil erosion
- Badlands
- Gullies
- Erosion pins
- remote sensing
- Aerial Photographs
- degradation
- rangelands
- rangeland condition
- monitoring
- Karoo
- South Africa
- Library Collection RecordEnvironmental policies in African rangelands affect development and welfare as well as environmental measures. Biodiversity is widely perceived as declining, and environments as undergoing…Publication Date 2004
- environmental policy
- African rangelands
- Environmental discourse
- Kenya
- Tanzania
- Serengeti
- Mara
- land use
- Land privatisation
- Commercial cultivation
- Biodiversity decline
- policies
- rangelands
- biodiversity
- degradation
- management
- decision support systems
- pastoralism
- system economics
- 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 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 RecordIn previous papers we have considered the optimal mix of biodiversity in semi-arid rangelands, focusing on the steady state. This paper addresses the question of conservation in the optimal use of…Publication Date 2004
- rangelands
- biodiversity
- Managed
- Natural
- conservation
- management
- fire ecology
- grazing
- livestock
- vegetation dynamics
- Africa
- Library Collection RecordThis study looks at the impact of subdivision and sedentarization of pastoral lands on wildlife numbers and production in a savanna ecosystem of southern Kenya. The study uses aerial counts over a…Publication Date 2009
- land fragmentation
- rangelands
- Maasai
- settlement
- conservation
- land reform
- land use
- savanna
- ecosystem dynamics
- ecosystem ecology
- wildlife
- management
- grazing
- grasslands
- socio-economic aspects
- Kenya
- Africa
- Library Collection RecordHabitat degradation through over-grazing and wood collection is especially prevalent in developing countries such as South Africa. As human populations expand and the demand for land increases, the…Publication Date 2005
- Lizards
- ecosystems
- disturbance
- reptiles
- biodiversity
- human impact
- savanna
- Traditional medicine
- South Africa
- degradation
- conservation
- land use
- species richness
- vegetation dynamics
- Africa
- Library Collection RecordConcerns about biodiversity preservation through grazing have revived interest in feeding choices made by herbivores. In this article, we study the dynamics of behavioural intake response in…Publication Date 2005
- foraging behaviour
- Bite
- intake rate
- sheep
- Feeding choices
- rangelands
- biodiversity
- forage quality
- Africa
- Library Collection RecordMany external effects of land use change are based on modifications of lateral flows of soil, water, air, fire or organisms. Lateral flows can be intercepted by filters and thus the severity and…Publication Date 2004
- biodiversity
- Filters
- fire
- Lateral flows
- Scale effects
- Watershed functions
- land use
- policies
- fire ecology
- species richness
- vegetation dynamics
- stakeholders
- hydrology
- management
- decision support systems
- Africa
- Library Collection RecordClimate, topography, vegetation and land use interact to influence fire regimes. Variable fire regimes may promote landscape heterogeneity, diversification in vegetation pattern and biotic diversity…Publication Date 2004
- Botswana
- Fire exclusion
- fire management
- Landsat
- landscape heterogeneity
- Landscape metric
- Patch characteristic
- prescribed fire
- Principal components analysis
- South Africa
- land use
- fire
- fire ecology
- grasslands
- climate
- vegetation dynamics
- biodiversity
- ecology
- 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 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 RecordIn African semi-arid savannas livestock production frequently dominates human activity, but it has been claimed that wildlife ranching can be more profitable than extensive beef production.…Publication Date 1994
- livestock production
- overstocking
- stocking rates
- Economic Aspects
- livestock
- rangelands
- cattle
- animal production
- wildlife
- Africa
- Library Collection RecordNo abstract availablePublication Date 1992
- rangelands
- modelling
- decision support systems
- Africa
- Library Collection RecordUse of Landsat vegetation indices (combinations of spectral bands) to measure standing crop biomass production in rangelands is addressed. The theoretical basis for vegetation indices is briefly…Publication Date 1983
- remote sensing
- Landsat images
- rangelands
- drought
- vegetation dynamics
- Africa
- Library Collection RecordThe rangelands of the world are declining in productivity in spite of the introduction of programmes designed to modernise these traditional pastoral systems of livestock production. This paper…Publication Date 1982
- rangelands
- animal production
- plant production
- subsistence agriculture
- traditional knowledge
- 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 RecordOne of the major issues in agropastoral development is the relationship of livestock and crop production. Does the introduction of crop cultivation on to productive rangeland deprive livestock of a…Publication Date 1991
- plant production
- animal nutrition
- animal production
- rangeland condition
- rangelands
- drought
- management
- stocking rates
- livestock
- 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 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 RecordThe conventional view of 34;traditional 34; or informal systems of African land rights is that they impede agricultural development, and that land titling or registration is needed to encourage land…Publication Date 1990
- politics
- socio-economic aspects
- rangelands
- economics
- land-use
- pastoralism
- soils
- legislation
- management
- stakeholders
- Africa
- Library Collection RecordThe discussion about rangeland degradation in African pastoral systems has so far largely been based on the conventional theory of [`]carrying capacity'. This paper argues that the carrying…Publication Date 1996
- degradation
- grazing systems
- Rangeland ecosystems
- grazing
- rangeland condition
- rangelands
- subsistence agriculture
- pastoralism
- carrying capacity
- management
- stocking rates
- forage quality
- plant production
- policies
- 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 RecordRangeland areas are characterized by sparse and limited hydrological data that make the use of existing mathematical runoff models difficult and impractical. A simple rational mathematical model was…Publication Date 1989
- Runoff modeling
- Hydrological modeling
- Runoff simulation
- Snowmelt modeling
- rangeland hydrology
- modelling
- rainfall
- rangelands
- runoff
- Africa
- Library Collection RecordThis article addresses the potential land use conflict between trees and cattle. The search for pasture frequently leads to the large-scale destruction of trees yet, paradoxically, when grazing land…Publication Date 1989
- cattle
- grazing
- pasture management
- communal farming
- land use
- management
- rangelands
- decision support systems
- sustainability
- Africa
Pagination
- First page
- Previous page
- …
- 2
- 3
- 4
- 5
- 6
- …
- Next page
- Last page