Rangeland Ecology & Management
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- Library Collection RecordThe effects of elevated atmospheric CO2 concentrations on plant polyphenolic, tannin, nitrogen, phosphorus and total nonstructural carbohydrate concentrations were investigated in leaves of…Publication Date 2005
- elevated CO2
- source-sink balance
- polyphenolics
- tannins
- grasses
- shrubs
- carbon dioxide
- plant autecology
- grasslands
- Phytochemistry
- Africa
- Library Collection RecordThe construction and validation of a user-friendly index to measure attitude of landowners towards conservation of Overberg Coastal Renosterveld (OCR), a critically endangered, distinctive grassy-…Publication Date 2005
- landowners
- Perceived benefit
- Willingness to conserve
- Cronbach Alpha
- socio-economic aspects
- conservation
- grasslands
- conservation agriculture
- land use
- eco - tourism
- Africa
- Library Collection RecordProduction-oriented research in the second half of the 20th century made impressive contributions to technical developments which helped to meet the food requirements of an expanding world population…Publication Date 2005
- Grassland science
- research priorities
- Tertiary education
- Agro-ecology
- environment
- grasslands
- management
- land use
- biodiversity
- conservation
- socio-economic aspects
- 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 RecordThe overall aim of the study was to investigate re-vegetation of disturbed sites, using nursery grown plugs (from seedling trays) of Themeda triandra, Heteropogon contortus and Hyparrhenia dregeana…Publication Date 2005
- restoration ecology
- revegetation
- grasslands
- herbicides
- Alien invasive species
- southern Africa
- Library Collection RecordAbstract. Disturbance may be an important determinant of plant community composition and diversity owing to its effects on competitive interactions, resources, dominance and vigour. The effect of…Publication Date 2004
- competition
- fire
- light
- litter
- Soil desiccation
- species richness
- fire ecology
- grasslands
- ecosystem ecology
- management
- Africa
- Library Collection RecordThe influence of burning (head and back fire) on seedling recruitment and survival of different grass species in a semi-arid grassland were quantified over the 2000/01 to 2001/02 growing seasons. The…Publication Date 2004
- fire ecology
- seed banks
- seeds
- grasslands
- Soil Condition
- vegetation dynamics
- Africa
- Library Collection RecordUrban nature conservation issues in South Africa are overshadowed by the goal to improve human well-being, which focuses on aspects such as poverty, equity, redistribution of wealth and wealth…Publication Date 2004
- Biotope mapping
- Integrated research
- native vegetation
- Phytosociology
- Urban ecology
- grasslands
- South Africa
- decision support systems
- biodiversity
- land-use
- Africa
- Library Collection RecordA thorough understanding of the role of microbes in C cycling in relation to fire is important for estimation of C emissions and for development of guidelines for sustainable management of dry…Publication Date 2004
- C isotopes
- C sequestration
- CO2 flux
- Dry and rainy season
- fire effects
- Microbial biomass C
- savanna
- Substrate-induced respiration
- carbon dioxide
- carbon dynamics
- fire
- management
- soils
- grasslands
- 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 RecordThe relationship between climatic change and human evolution can be framed in terms of three major hypotheses. A modern version of the long-held savanna hypothesis posits that the expansion of…Publication Date 2004
- Plio-Pleistocene hominins
- Homo
- Paranthropus
- grasslands
- Faunal change
- Turkana basin
- Lower Omo valley
- Africa
- Library Collection RecordThe carbon isotope signature of fossil phytoliths (silica bodies produced in abundance in the tissue of grasses) presents a promising tool for reconstructing the biogeography of C3 and C4 grasses…Publication Date 2004
- phytoliths
- carbon isotopes
- C3/C4 grasses
- grasslands
- paleoecology
- palaeobotany
- palaeoecology
- Africa
- Library Collection RecordWe examined the effects of an alien species, Lehmann lovegrass (Eragrostis lehmanniana), on the semi-arid grassland ecosystems of the south-western United States. In order to evaluate these effects,…Publication Date 2004
- Faunalpedoturbation
- Lehmann lovegrass
- Alien species
- Desert Grassland
- grasslands
- Alien invasive species
- Soil Condition
- animal impact
- disturbance
- 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 RecordSavannas and grasslands in South Africa are adapted to fire, yet long-term effects of fire on soil, water and nutrients remain largely unknown. To determine whether frequent burning increases the…Publication Date 2004
- Soil crusting
- infiltration
- fire
- Clay dispersion
- fire ecology
- Soil Condition
- savanna
- grasslands
- soil moisture
- soil nutrients
- 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 RecordSouth African grasslands support a rich flora that is attracting growing conservation interest. Fire has long been used to manage grasslands for livestock production. However, there is very little…Publication Date 2004
- Alpha-diversity
- Beta-diversity
- Long-term ecological research
- grasslands
- fire ecology
- conservation
- management
- species richness
- biodiversity
- Africa
- Library Collection RecordThe abundance and distribution patterns of four threatened species of bustards (Eupodotis caerulescens, E. barrowii, E. melanogaster and Neotis denhami) in 3200 km2 of montane grasslands in the…Publication Date 2004
- Bustards
- South Africa
- distribution patterns
- Conservation status
- grasslands
- birds
- land use
- biodiversity
- monitoring
- 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 RecordWe analyzed data sets on phytomass production, basal cover, and monthly precipitation of a semiarid grassland in South Africa for good, medium, and poor rangeland condition (a) to investigate whether…Publication Date 2004
- grasslands
- plant production
- rainfall
- rangeland condition
- modelling
- biomass
- Africa
- Library Collection RecordUniversity of Natal , Pietermaritzburg, Doctor of Philosophy in the School of Life and Environmental Sciences.Publication Date 2004
- grasslands
- mangement
- carbon dioxide
- community vegetation studies
- plant production
- water use efficiency
- ecosystem ecology
- Africa
- Library Collection RecordNo Abstract available.Publication Date 2003
- grasslands
- management
- agriculture
- southern Africa
- Library Collection RecordThe KwaZulu-Natal region of South Africa hosts a large diversity of asclepiads (Apocynaceae: Asclepiadoideae), many of which are endemic to the area. The asclepiads are of particular interest because…Publication Date 2003
- animals
- ecosystem
- Flowers/physiology/ultrastructure
- Gentianaceae/*physiology
- Hymenoptera/*physiology/ultrastructure
- microscopy
- Electron
- Scanning
- Poaceae/*physiology
- Pollen/*physiology/ultrastructure
- South Africa
- grasslands
- endemic species
- ecosystem ecology
- insects
- Africa
- Library Collection RecordAbstract Aims To identify approaches to improve our understanding of, and predictive capability for, mixed tree–grass systems. Elucidation of the interactions, dynamics and determinants, and…Publication Date 2003
- Coexistence
- competition
- facilitation
- modelling
- primary production
- savanna
- shrubland
- grasslands
- rangelands
- tree–grass ratios
- ecosystem dynamics
- management
- Africa
- Library Collection RecordThat data from polar orbiting satellites have detected a widespread increase in photosynthetic activity over the last 20 years in the grasslands of the Sahel is justifies investigating its role in…Publication Date 2003
- Light Use Efficiency
- gross primary production
- grasslands
- NDVI
- Sahel
- Carbon cycle
- remote sensing
- plant production
- NDVI values
- modelling
- NOAA
- Africa
- Library Collection RecordAcocks measured representative sites of good condition grassland in the 1940's that were re-sampled approximately 50 years later in order to compare the effect of commercial versus communal…Publication Date 2003
- grasslands
- land use
- commercial agriculture
- communal farming
- grazing
- forage quality
- vegetation dynamics
- Africa
- Library Collection RecordJohn Acocks' ideas on the recent and future changes of vegetation in South Africa occupy an important conceptual position in the first and subsequent editions of Veld Types of South Africa.…Publication Date 2003
- rangeland condition
- rangelands
- grasslands
- management
- agriculture
- degradation
- vegetation dynamics
- Africa
- Library Collection RecordThe effects of burning a native grassland on soil organic matter status was investigated on a long-term (50 years) field experiment where different times and frequencies of burning were compared.…Publication Date 2003
- burning
- organic matter
- grassland
- nitrogen
- Light fraction
- microbial biomass
- fire ecology
- grasslands
- soils
- Africa
- Library Collection RecordFires in African savannas produce emissions contributing to changes in global biogeochemical processes. In the Southern African Regional Science Initiative (SAFARI-2000), fuels characteristics were…Publication Date 2003
- Kalahari
- biomass
- moisture content
- fire intensity
- rate of spread
- flame length
- emissions
- fire
- savanna
- grasslands
- greenhouse gases
- Africa
- Library Collection RecordWe examined relationships between vegetation and soil nutrients along rainfall and land use gradients in the Kalahari. Soil organic carbon (SOC) was significantly lower where reduced rainfall and…Publication Date 2003
- soil organic carbon
- soil organic nitrogen
- rainfall gradient
- land-use gradient
- Kalahari
- savanna
- Botswana
- soil nutrition
- rainfall
- grazing
- grasslands
- land use
- Africa
- Library Collection RecordThe effect of intensive grazing and browsing of domestic stock and wildlife on the number of species and abundance of vegetation was investigated in the Hoanib River catchment, north-western Namibia…Publication Date 2003
- vegetation impact
- Arid Environment
- intensive grazing
- ecosystem ecology
- vegetation dynamics
- grasslands
- grazing
- livestock
- wildlife
- land use
- drought
- Africa
- Library Collection RecordAs stated by many authors in the recent past, soil erosion is one of the major environmental problems in southern Africa and it will become even more severe in the future due to population growth and…Publication Date 2003
- remote sensing
- degradation
- Erosion modelling
- Swaziland
- modelling
- soil erosion
- grasslands
- Africa
- Library Collection RecordMosaics of natural forest and grassland tracts in sub-Saharan Africa provide differences in woody species biodiversity. These mosaics are of considerable interest as they are a major biodiversity…Publication Date 2002
- biodiversity
- Shannon index
- tropical forest
- grassland
- burning
- spatial variability
- Uganda
- grasslands
- fire ecology
- management
- Africa
- Library Collection RecordWe evaluated the effects of livestock grazing on C content of the plant-soil system (to 60 cm) of two semi-arid grasslands: a mixed-grass prairie (grazed 12 years), and a short-grass steppe (grazed…Publication Date 2002
- carbon
- C storage
- grasslands
- grazing
- Great Plains
- soil organic carbon
- stocking rates
- management
- Africa
- Library Collection RecordThe USA has about 336 Mha of grazing lands of which rangelands account for 48%. Changes in rangeland soil C can occur in response to a wide range of management and environmental factors. Grazing,…Publication Date 2002
- C sequestration
- rangelands
- grazing
- management
- organic carbon
- soil organic carbon
- fire
- fertilizer
- grasslands
- erosion
- Africa
- Library Collection RecordThe Kinangop highland grasslands, the world stronghold of the endangered Sharpe's longclaw (Macronyx sharpei), consist almost entirely of privately owned land. As human population in the…Publication Date 2002
- fragmentation
- human population
- Land subdivision
- Privately owned land
- land use
- management
- species richness
- grasslands
- birds
- Africa
- Library Collection RecordWe examined the relationship between a Chihuahuan Desert grassland keystone species (banner tailed kangaroo rat, Dipodomys spectabilis) and several vegetation and soil indicators of rangeland health…Publication Date 2002
- banner-tailed kangaroo rat
- Chihuahuan Desert
- desertification
- Dipodomys spectabilis
- Environmental indicators
- degradation threshold
- grasslands
- degradation
- decision support systems
- modelling
- Africa
- Library Collection RecordSummary Grasslands are located in areas with precipitation ranging between 150 and 1200 mm yr-1 and temperature between 0 and 25 C (Lieth and Whittaker, 1975). Along a precipitation gradient, in…Publication Date 2001
- grasslands
- rainfall
- ecosystem ecology
- southern Africa
- Library Collection RecordWoody plant encroachment has been widespread in grassland and savanna ecosystems over the past century. This phenomenon jeopardizes grassland biodiversity and threatens the sustainability of pastoral…Publication Date 2001
- grasslands
- soils
- indigenous encroaching species
- southern Africa
- Library Collection Record
240 Grasslands
Vegetation dominated by grasses, which is among the largest ecosystems in the world, has great environmental significance as well as providing feed for livestock and wildlife. Grassland types vary…Publication Date 2001- savannah
- steppe
- grasses
- herbivory
- grazing
- fire
- savanna
- grasslands
- disturbance
- livestock
- southern Africa
- Library Collection RecordAbstract. South Africa has an important responsibility to global biodiversity conservation, but a largely inadequate conservation area network for addressing this responsibility. This study employs a…Publication Date 2001
- biodiversity
- conservation
- savanna
- grasslands
- land use
- Africa
- Library Collection RecordWe investigated a variety of habitat characteristics along a land-use gradient in an attempt to determine which factors may have influenced the population decline of redwing francolin, Francolinus…Publication Date 2001
- grasslands
- grazing
- habitat
- redwing francolin
- pasture management
- birds
- ecology
- biodiversity
- fire
- Africa
- Library Collection RecordSummary * 1The influence of botanical composition on annual phytomass production of a semi-arid grassland in response to precipitation was tested with a 19-year experiment. Three compositional states…Publication Date 2001
- basal cover
- biodiversity
- plant production
- precipitation-use efficiency
- rainfall
- grasslands
- rangeland condition
- modelling
- runoff
- Africa
- Library Collection RecordSummary * 1Seasonal rivers in semi-arid African savannas support riparian woodland and hydromorphic grassland, key habitats for wildlife or livestock. We investigated the effect of numerous, small,…Publication Date 2001
- Bush encroachment
- Combretum imberbe
- Faidherbia albida
- hydrology
- riparian
- grasslands
- drought
- grazing
- ecology
- Africa
- Library Collection RecordThe community structure and abundance of plant-feeding nematodes were studied in four grasslands, which had not been fertilised for 6, 10, 23, and 28 years, respectively. We hypothesised that…Publication Date 2001
- body size
- Feeding strategy
- Food quality
- nematodes
- soil fertility
- succession
- grasslands
- fertilizer
- invertebrates
- ecosystem ecology
- soil nutrients
- Africa
- Library Collection RecordAbstract not available.Publication Date 2001
- soil moisture
- vegetation
- ecohydrology
- stochastic processes
- hydrology
- water stress
- water balance
- savanna
- grasslands
- Crossing analysis
- Africa
- Library Collection RecordThis series of four papers studies the complex dynamics of water-controlled ecosystems from the hydro-ecological point of view [e.g., I. Rodriguez-Iturbe, Water Resour. Res. 36 (1) (2000) 3–9].…Publication Date 2001
- soil moisture
- vegetation
- ecohydrology
- stochastic processes
- hydrology
- water stress
- water balance
- savanna
- grasslands
- Crossing analysis
- Africa
- Library Collection RecordInteractions between fire regime, dispersal strategies and patch structure were examined as key issues for the management of floristic composition of grasslands, through a model that simulates the…Publication Date 2001
- grasslands
- fire management
- fire frequency
- Dispersal strategies
- colonization
- simulation model
- grassland
- fire ecology
- management
- vegetation dynamics
- biodiversity
- modelling
- seeds
- Africa
- Library Collection RecordAt current densities, elephants are having a severe impact on plant community structure and species richness in the Addo Elephant National Park (AENP), Eastern Cape, South Africa. Those species that…Publication Date 2001
- Biodiversity maintenance
- Elephant impacts
- grazing impacts
- Reserve design
- Threatened flora
- biodiversity
- animal impact
- grasslands
- ecosystem dynamics
- species richness
- national parks
- conservation
- Africa
- Library Collection RecordFlight behaviours of 23 butterfly species were mapped to establish the effect of both pine afforestation and different-sized grassland linkages on localised butterfly movements. Blocks of pine trees…Publication Date 2001
- Lepidoptera
- Habitat webs
- Behaviour
- afforestation
- Linkages
- grasslands
- conservation
- insects
- Africa