Rangeland Ecology & Management
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Displaying 101 - 150 of 176 results
- 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 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 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 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 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
- Library Collection RecordPartitioning available energy between plants and bare soil in sparsely vegetated rangelands will allow hydrologists and others to gain a greater understanding of water use by native vegetation,…Publication Date 1992
- rangelands
- hydrology
- ecosystem ecology
- modelling
- Africa
- Library Collection RecordDifferences in grazing behavior among Hereford (HH), 50% Angus-50% Hereford (AH), 50% Simmental-50% Hereford (1S1H) and 75% Simmental-25% Hereford (3S1H) lactating cows grazing foothill range were…Publication Date 1988
- grazing
- cattle
- foraging ecology
- pasture management
- animal production
- rangelands
- Africa
- Library Collection RecordOn semi-arid rangelands, stems and other standing dead material may accumulate in bunch-grasses and restrict access to new growth by grazing animals. We found that the presence and heights of…Publication Date 1987
- grazing
- rangelands
- rangeland condition
- cattle
- foraging ecology
- diet selection
- Africa
- Library Collection RecordYoung animals face unique constraints in foraging on rangelands. They are at an inherent disadvantage to older animals because they have higher nutritional requirements and they lack foraging…Publication Date 1986
- diet selection
- foraging ecology
- animal nutrition
- animal production
- goats
- rangelands
- Africa
- Library Collection RecordThis paper presents a structured research design to achieve an economically viable and ecologically sustainable land use. It includes the major elements required to achieve a predictive capability at…Publication Date 1996
- adaptive management
- Ecological economics
- landscape ecology
- rangelands
- Sustainable utilisation
- Economic Aspects
- Systems research
- Sustainable development
- management
- Africa
- Library Collection RecordThe carrying capacity concept was developed from animal ecology, and applied to rangeland management in order to assess sustainable livestock stocking rates. In it, long-term ecological…Publication Date 1994
- rangelands
- management
- livestock
- carrying capacity
- stocking rates
- agriculture
- sustainability
- Africa
- Library Collection Record
129 Rangelands
Effective integration of the three main goals of rangeland management - economic gain through livestock production, management of game animals for recreational use, and conservation of biological…Publication Date 1992- rangelands
- biodiversity
- Economic Aspects
- grazing
- livestock
- conservation
- animal impact
- animal production
- management
- fire
- restoration ecology
- Africa
- Library Collection RecordDisease of domestic animals on rangelands is caused by a wide variety of agents (some infectious and some non-infectious). Disease is primarily a function of the ecosystem, where a shift in the…Publication Date 1992
- livestock
- disease
- rangelands
- ecosystem ecology
- economics
- Africa
- Library Collection RecordA state-of-the-art review is presented concerning the transport of nutrients (N and P), oxygen demanding compounds (BOD and COD), indicator organisms and pathogens in runoff from land areas receiving…Publication Date 1980
- pasture management
- rangelands
- pollution
- nutrient loads
- management
- runoff
- Africa
- Library Collection RecordRemote sensing applications used for resource assessment often lack the capacity to test image data against predictions. This article describes remote environment and management assessment (REMA), a…Publication Date 1995
- remote sensing
- Landsat images
- rangelands
- animal impact
- fodder production
- modelling
- Africa
- Library Collection RecordRemote sensing in aridland/rangeland regions has developed to meet the need for low cost management information over large expanses of land. Applications include rangeland management, watershed…Publication Date 1987
- remote sensing
- rangelands
- management
- Africa
- Library Collection RecordLandsat data were simulated for a three-component rangeland scene consisting of grass, brush, and soil to evaluate the effect of soil background reflectance on the sensitivity of ratio and orthogonal…Publication Date 1986
- Landsat images
- rangelands
- soil
- modelling
- Africa
- Library Collection RecordIn this paper, the second part of a two-part series, the performance of a quasi-physically based rainfall-runoff model (QPBRRM) is evaluated for a set of 39 events from a small rangeland catchment (R…Publication Date 1992
- rainfall
- runoff
- rangelands
- soil moisture
- modelling
- ecology
- Africa
- Library Collection RecordThis paper, the first part in a two-part series, is concerned with the interpretation of spatial and temporal variations in soil water content across a small rangeland catchment; two data sets are…Publication Date 1992
- rainfall
- runoff
- rangelands
- soil moisture
- modelling
- Africa
- Library Collection RecordThree algebraic infiltration equations (Kostiakov's, Horton's and Philip's) were examined to determine which one would best fit infiltrometer data collected from a variety of mostly…Publication Date 1976
- rainfall
- rangelands
- hydrology
- Africa
- Library Collection RecordNo abstract availablePublication Date 1969
- hydrology
- rangelands
- southern Africa
- Library Collection RecordNo abstract availablePublication Date 1991
- revegetation
- rangelands
- ecology
- vegetation dynamics
- Africa
- Library Collection RecordSince the mid-19th century settled livestock ranching has been the major form of land use in South Africa, occupying 68% of the land surface. Decreases in livestock densities and ranch numbers during…Publication Date 1995
- rangeland condition
- rangelands
- management
- degradation
- carrying capacity
- grazing
- indigenous encroaching species
- restoration ecology
- sustainability
- Africa
- Library Collection RecordThe Eastern Cape Subtropical Thicket (ECST) forms the transition between forest, semiarid karroid shrublands, and grassland in the Eastern Cape, South Africa. Undegraded ECST forms an impenetrable,…Publication Date 1995
- rangeland condition
- rangelands
- degradation
- eco - tourism
- grasslands
- ecosystem ecology
- Africa
- Library Collection RecordBotswana 039;s Kalahari rangelands have historically supported a diversity of wildlife and a number of subsistence livelihood activities, such as agropastoralism, hunting and gathering. Recently,…Publication Date 2003
- rangelands
- matsheng
- subsistence livelihoods
- sustainability
- community-based natural resource management
- economics
- animal production
- rangeland condition
- Africa
- Library Collection RecordOveroptimistic stocking rates are the leading cause of rangeland degradation. The phenomenon of patch-selective grazing means that the stocking rate on heavily used patches is much higher than that…Publication Date 2003
- basal area
- patch overgrazing
- patch selection
- spatial heterogeneity
- Species Composition.
- stocking rates
- rangeland condition
- degradation
- rangelands
- grazing
- animal impact
- management
- Africa
- Library Collection RecordThis study examined the short-term response of rangeland to annual (1993/94 to 1996/97 seasons) application of fertilizer [all combinations of 0; 10; 30 and 50 kgha-1nitrogen (N), with 0 and 10 kgha…Publication Date 2002
- aboveground phytomass production
- drought sensitivity
- Crude Protein Content
- nitrogen
- nutrient use efficiency
- phosphorus
- rain-use efficiency
- soil compaction
- rangelands
- fertilizer
- plant production
- species richness
- Soil Condition
- vegetation dynamics
- soil fertility
- Africa
- Library Collection RecordAfter-ripening of Cenchrus ciliaris L. spikelets was modelled during storage at various temperatures and equilibrium relative humidities (e.r.h.). At 40 and 50% e.r.h., the rate of after-ripening…Publication Date 2001
- after-ripening model
- buffel grass
- Cenchrus ciliaris seed dormancy
- seed germination
- rangeland re-seeding
- seeds
- germination
- grasslands
- restoration ecology
- reseeding
- degradation
- rangelands
- Africa
- Library Collection RecordExperiments were conducted to investigate: (1) tiller recruitment within the interior of Eragrostis curvula tussocks, with and without litter removal; and (2) effects of moderate defoliation on…Publication Date 2000
- tiller demography
- tiller mortality
- central dieback
- clipping
- bunchgrass
- Semi-arid rangeland
- warm-season grass
- rangelands
- plant autecology
- grasslands
- Africa
- Library Collection RecordWe present a remotely-sensed degradation assessment technique based on the measurement of landscape heterogeneity (a key determinant of degradation status). The moving standard deviation index (MSDI…Publication Date 1999
- rangelands
- remote sensing
- NDVI values
- landscape heterogeneity
- Landsat TM
- Landsat images
- landscape ecology
- disturbance
- vegetation dynamics
- Africa
- Library Collection RecordRecent political changes in South Africa have required a new approach to project management, one that includes community involvement at all levels of project planning, decision-making and execution.…Publication Date 1998
- Mier Rural Area
- Kalahari
- South Africa
- desertification
- Community involvement
- rangeland degradation
- rangeland rehabilitation
- rangeland condition
- rangelands
- degradation
- rehabilitation
- management
- community based resource management
- socio-economic aspects
- decision support systems
- stakeholders
- Africa
- Library Collection RecordA recently published rangeland health assessment guide for arid shrublands of the Karoo, South Africa, addresses the problem of apathy toward rangeland. The guide is designed for land users with a…Publication Date 1998
- rangeland health assessment guide
- South Africa
- shrublands
- Karoo
- rangelands
- decision support systems
- Soil Condition
- animal production
- plant production
- ecology
- management
- Africa
- Library Collection RecordThis paper examines the advantages of the traditional cattlepost system against the recent drive towards the fencing of Botswana's rangelands and the establishment of privatised, commercial beef…Publication Date 1996
- rangelands
- degradation
- Kalahari
- Cattle Ranching
- Hunter-gatherers
- Botswana
- cattle
- subsistence agriculture
- commercial agriculture
- socio-economic aspects
- Economic Aspects
- politics
- policies
- grazing
- Africa