Rangeland Ecology & Management
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Displaying 51 - 100 of 153 results
- 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 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 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 RecordThe expected outcome of weed control in natural systems is that the decline of a dominant weed will result in an increase in diversity of the plant community but this has seldom been tested. Here we…Publication Date 2009
- Centaurea diffusa
- Larinus minutus
- weed biocontrol
- Invasive species treadmill
- ecological restoration
- Bromus spp.
- diversity
- biodiversity
- species richness
- Weeds
- insects
- Alien invasive species
- vegetation dynamics
- biological control
- restoration ecology
- White Lake
- British Columbia
- Canada
- Library Collection RecordSavannas are ecosystems characterized by the coexistence of woody species (trees and bushes) and grasses. Given that savanna characteristics are mainly formed from competition, herbivory, fire,…Publication Date 2009
- Spatially explicit
- soil moisture
- Cyclical transition
- Arid
- Mesic
- spatial autocorrelation
- shrub invasion
- Vegetation cycles
- Tree
- Bush
- grasslands
- savanna
- modelling
- vegetation dynamics
- animal impact
- fire ecology
- Soil Condition
- rainfall
- Library Collection RecordMany mechanisms have been suggested to explain the coexistence of woody species and grasses in savannas. However, evidence from field studies and simulation models has been mixed. Patch dynamics is a…Publication Date 2009
- Cyclical succession
- Spatiotemporal scales
- competition
- simulation models
- shrub encroachment
- Mosaic cycles
- Woody Species
- shrubs
- grasses
- savanna
- grasslands
- vegetation dynamics
- ecology
- modelling
- rainfall
- Library Collection RecordThe objective of this study was to clarify whether the changes in percent cover of plant functional types (i.e., life forms and growth forms) along a grazing gradient reflect the livestock number,…Publication Date 2009
- grazing intensity
- plant functional type
- rangeland ecology
- semi-arid
- grazing
- livestock
- management
- sheep
- grasslands
- plant anatomy
- plant autecology
- vegetation dynamics
- Mongolia
- China
- Library Collection RecordThe relationship between vegetation and soil erosion deserves attention due to its scientific importance and practical applications. A great deal of information is available about the mechanisms and…Publication Date 2009
- soil erosion
- seed dispersal
- soil seed bank
- plant community
- vegetation distribution
- seed banks
- vegetation dynamics
- degradation
- ecology
- Library Collection RecordHerbicides have been applied extensively on rangelands to reduce forbs that were considered undesirable, which has been assumed to lead to an increase in grass production and ultimately to an…Publication Date 2009
- biodiversity
- conservation
- average daily gain
- Cattle Performance
- Great Plains
- competition
- invasive species
- mixed prairie
- plant species composition
- vegetation dynamics
- weed control
- Weeds
- herbicides
- grasslands
- plant production
- animal production
- Oklahoma
- USA
- Library Collection RecordAn overview of ecological models of grasslands and their research questions is presented. For the purpose of this article, models are regarded as a simplified and formalized representation of…Publication Date 2008
- competition
- disturbance
- Ecosystem modeling
- Grassland dynamics
- grazing
- Optimal life-history strategies
- primary production
- Remote sensing data
- Spatially explicit models
- succession
- modelling
- ecosystem ecology
- community
- vegetation dynamics
- plant production
- southern Africa
- Library Collection RecordAbstract Question: Do anthropogenic activities facilitate the distribution of exotic plants along steep altitudinal gradients? Location: Sani Pass road, Grassland biome, South Africa. Methods: On…Publication Date 2008
- Alien
- dispersal
- disturbance
- Gradient analysis
- grasslands
- Multivariate
- spatial analysis
- transect
- Germishuizen & Meyer (2003)
- Alien invasive species
- rehabilitation
- restoration ecology
- management
- biodiversity
- seed banks
- vegetation dynamics
- Africa
- Library Collection RecordSummary * 1Demographic processes, particularly the recruitment of seedlings, are critical to the long-term survival and re-establishment of plant populations. In many perennial grasslands successful…Publication Date 2008
- demography
- emergence
- full factorial experiment
- intraspecific competition
- irrigation
- recruitment limitation
- seed addition
- seedling survival
- semi-arid savanna
- Stipagrostis uniplumis
- grasslands
- fire ecology
- seeds
- ecosystem ecology
- vegetation dynamics
- germination
- Africa
- Library Collection RecordCoexistence of trees and grasses in savannas should be possible if competition between the woody and the grassy components is less intense than the competition within each component. Although several…Publication Date 2008
- Acacia mellifera
- Competitor removal experiment
- Nearest-neighbour distance
- quantile regression
- spatial autocorrelation
- Spatial point pattern analysis
- savanna
- ecosystem ecology
- vegetation dynamics
- ecology
- Africa
- Library Collection RecordNamibian rangelands are encroached with Acacia mellifera, partially resulting from a poor understanding of vegetation dynamics. A conceptual state-and-transition model of vegetation dynamics in the…Publication Date 2008
- fire
- hazards
- management
- opportunities
- state-and-transition
- savanna
- indigenous encroaching species
- bush thickening
- rainfall
- seed banks
- vegetation dynamics
- plant autecology
- Africa
- Library Collection RecordA number of studies have begun to show the large impact that pastoralism has on African savanna ecosystems. Here we look at the impact of abandoned settlements on the distribution of the large…Publication Date 2008
- pastoralism
- Sedentarization
- primary succession
- Nutrient hotspots
- community
- land use
- Abandoned lands
- vegetation dynamics
- Africa
- Library Collection RecordChanges in species richness and vegetation composition in the diverse semi-arid Succulent Karoo vegetation of South Africa were investigated after 67 (1937-2004) years of rest from livestock grazing…Publication Date 2008
- diversity
- Growth Form
- ordination
- species richness
- succession
- Termitaria
- grazing
- vegetation dynamics
- ecology
- insects
- degradation
- restoration ecology
- Africa
- Library Collection RecordIn the Miombo Woodlands Region of south-central Africa, the interaction between fires and elephants is one of the main drivers of vegetation, along with climate, soils and topography. Fire-elephant…Publication Date 2008
- fire
- Elephants
- multivariate statistics
- Miombo woodlands
- conservation
- savanna
- mammals
- Nature reserves
- vegetation dynamics
- ecology
- ecosystem ecology
- Africa
- Library Collection RecordThe self-thinning line is a very robust pattern, which can be obtained in modeling studies by a variety of different mechanistic assumptions. Our opinion is that we can only advance in our…Publication Date 2008
- Size inequality
- Competitive asymmetry
- Zone of influence model
- Arid savanna
- Acacia reficiens
- Namibia
- Parsimony
- Pattern-oriented modeling
- savanna
- vegetation dynamics
- modelling
- Africa
- Library Collection RecordA payments for ecosystem services (PES) system came about in South Africa with the establishment of the government-funded Working for Water (WfW) programme that clears mountain catchments and…Publication Date 2008
- Working for Water
- Payment mechanisms
- ecosystem services
- water supply
- Poverty relief
- Poverty
- Alien invasive species
- fire
- plant production
- biodiversity
- hydrology
- vegetation dynamics
- Economic Aspects
- Africa
- Library Collection RecordSound understanding of the influence of scale and context on ecological patternprocess relationships is lacking in many systems. The hierarchical patch dynamics paradigm (HPDP) provides a framework…Publication Date 2008
- vegetation dynamics
- savanna
- riparian ecology
- South Africa
- Kruger National Park
- Savanna ecology
- spatial ecology
- management
- woody plants
- indigenous encroaching shrubs
- modelling
- southern Africa
- Library Collection RecordNo abstract availablePublication Date 2007
- seed banks
- savanna
- vegetation dynamics
- Africa
- Library Collection RecordAbstract Anthropogenic perturbations have profoundly modified the Earth's biogeochemical cycles, the most prominent of these changes being manifested by global carbon (C) cycling. We…Publication Date 2007
- carbon sequestration
- 13C NMR
- deforestation
- land-use change
- NEXAFS
- organic matter composition
- Sr-FTIR-ATR
- synchrotron radiation
- land use
- grasslands
- vegetation dynamics
- carbon dynamics
- soil organic carbon
- agriculture
- Africa
- Library Collection RecordSummary In this paper, we present a method to estimate the additional costs made by nature reserve managers to mitigate the effects of atmospheric deposition. Theoretically, these extra costs may be…Publication Date 2007
- Nature target types
- Management costs
- Deposition scenarios
- grasslands
- Reed and rough land
- Heathland
- forests
- Moorland pools
- conservation
- vegetation dynamics
- Economic Aspects
- greenhouse gases
- Africa
- Library Collection RecordThe Kalahari sand sheet, with a 2.5-million ha area, is probably the largest continuous surface of sand in the world. The Kalahari Transect (KT) is one of a set of IGBP 'megatransects '…Publication Date 2007
- biogeochemistry
- Hydraulic properties
- Kalahari transect
- Sand deposits
- stable isotopes
- ecosystem dynamics
- vegetation dynamics
- soil organic carbon
- Soil Condition
- soil nutrients
- rainfall
- grasslands
- Africa
- Library Collection RecordIn Namaqualand, heavy grazing of low-lying areas has resulted in the reduction of palatable perennial shrubs and the dominance of the unpalatable shrub, Galenia africana. This study investigates the…Publication Date 2007
- Succulent karoo
- Namaqualand
- Vegetation Change
- rehabilitation
- microhabitats
- grazing
- seeds
- restoration ecology
- vegetation dynamics
- Africa
- Library Collection RecordMany mechanisms have been suggested to explain the coexistence of woody species and grasses in savannas, yet, evidence from field studies and simulation models has been mixed. Shrub encroachment is…Publication Date 2007
- Patch-dynamics
- Cyclical succession
- shrub encroachment
- Spatially explicit root growth
- Computer simulation model
- Validation
- Latin Hypercube sensitivity analysis
- Acacia mellifera
- savanna
- indigenous encroaching species
- vegetation dynamics
- ecosystem ecology
- modelling
- rainfall
- fire
- soil moisture
- Africa
- Library Collection RecordThe aim of the study was to identify and classify the woodlands, bushland and grasslands of the Umkhanyakude Integrated Sustainable Rural Development Node (also known as Maputaland) into homogenous…Publication Date 2006
- plant ecology
- Maputaland
- multivariate analysis
- Phytosociology
- grasslands
- monitoring
- data analysis
- landscape ecology
- vegetation dynamics
- Africa
- Library Collection RecordThis paper evaluated the capacity of SPOT VEGETATION time-series to monitor the vegetation biomass and water content in order to improve fire risk assessment in the savanna ecosystem of Kruger…Publication Date 2006
- biomass
- Fire risk assessment
- SPOT VEGETATION
- time-series
- Vegetation water content
- fire ecology
- savanna
- vegetation dynamics
- monitoring
- plant production
- national parks
- remote sensing
- Africa
- Library Collection RecordThe coexistence of woody and grassy plants in savannas has often been attributed to a rooting-niche separation (two-layer hypothesis). Water was assumed to be the limiting resource for both growth…Publication Date 2006
- fire
- grazing
- Honeycomb rippling model
- Inter-tree competition
- Spatio-temporal rainfall variation
- Tree-grass coexistence
- savanna
- indigenous encroaching species
- grasslands
- soil moisture
- rainfall
- vegetation dynamics
- Africa
- Library Collection RecordThe objective of this paper is to examine the spatial variability of islands of enhanced hydrologic activity and its application to remediation of degraded arid and semi-arid ecosystems. Factors…Publication Date 2006
- Biotic productivity
- heterogeneity
- rangeland
- remediation
- runoff
- Water ponding dikes
- restoration ecology
- degradation
- vegetation dynamics
- ecosystem ecology
- Africa
- Library Collection RecordDegradation in semi-arid Karoo rangelands has been ascribed to over-utilization by livestock and variations in rainfall regime. The understanding of vegetation dynamics in confined plant-herbivore…Publication Date 2006
- African wild herbivore
- Herbivore exclosure
- plant functional type
- Protected area
- vegetation monitoring
- rangelands
- rangeland condition
- vegetation dynamics
- livestock
- grazing
- land use
- national parks
- rainfall
- monitoring
- Africa
- Library Collection RecordIn semiarid savannas of Southern Africa current land use practices and climate change may lead to substantial changes of vegetation structure in the near future, however uncertainty remains about the…Publication Date 2006
- Acacia erioloba
- Bush encroachment
- global change
- Grewia flava
- overgrazing
- seed dispersal
- shrub encroachment
- Southern Kalahari
- Spatial-explicit simulation model
- savanna
- land use
- grazing
- climate change
- vegetation dynamics
- cattle
- ecosystem ecology
- ecosystem dynamics
- rainfall
- fire ecology
- modelling
- conservation
- management
- carrying capacity
- biodiversity
- indigenous encroaching species
- Africa
- Library Collection RecordRapid population growth, unsustainable land use, and a pervasively degrading landscape are components of a dominant paradigm regarding African development. While recent work articulating the '…Publication Date 2006
- conservation
- land tenure
- land use
- remote sensing
- deforestation
- Uganda
- vegetation dynamics
- degradation
- Sustainable development
- grasslands
- biomass
- soil
- Africa
- Library Collection RecordThe Ngorongoro Crater is a volcanic caldera located within the Ngorongoro Conservation Area in Tanzania. The Crater comprises a flat grassland plain surrounded by steep, bushy walls. It contains…Publication Date 2006
- grasslands
- conservation
- cattle
- fire ecology
- ecosystem ecology
- management
- monitoring
- vegetation dynamics
- southern Africa
- Library Collection RecordSummary in English and Afrikaans. Also issue on CD-ROMPublication Date 2006
- rangeland management
- pasture management
- Economic Aspects
- vegetation dynamics
- pastoralism
- animal production
- southern 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 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 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 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 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 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 RecordAim To determine whether patterns of avian species turnover reflect either biome or climate transitions at a regional scale, and whether anthropogenic landscape transformation affects those patterns…Publication Date 2004
- Avian species turnover
- ?-diversity
- biome
- heterogeneity
- spatial congruence
- birds
- biodiversity
- vegetation dynamics
- ecosystem ecology
- climate
- landscape ecology
- land use
- 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 RecordDuring the dormant winter period the semi-arid rangeland areas of South Africa are characterized by unplanned fires, either by lightning or negligence by man. The quantification of the impact of…Publication Date 2004
- Above-ground phytomass production
- basal cover
- Crude Protein Content
- Grass sward recovery
- Head fire
- litter
- rain-use efficiency
- root mass
- fire ecology
- rangelands
- plant production
- vegetation dynamics
- ecosystem ecology
- management
- Africa
- Library Collection RecordThe number of tsessebes in Kruger National Park, South Africa, increased during 1977-1985, but declined after 1986. We used tsessebe number and age structure to determine year-to-year variation in…Publication Date 2004
- drought
- population dynamics
- Population model
- rainfall
- plant production
- modelling
- tsessebe
- wildlife
- vegetation dynamics
- 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 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