Rangeland Ecology & Management
Get reliable science
Toggle Search
Result Type
Collection
Keywords
Document Type
Displaying 201 - 250 of 252 results
- Library Collection RecordSmall mammal and bird assemblages were compared across fence-lines between one communal and three adjacent commercial range-lands in Namaqualand, South Africa. The communal area has twice the…Publication Date 1999
- Arid rangelands
- birds
- grazing
- livestock impacts
- small mammals
- Succulent karoo
- livestock
- management
- biodiversity
- Africa
- Library Collection RecordInvertebrate assemblages occurring on Paulshoek, a heavily grazed communal farm in Namaqualand, South Africa, were compared to those found on adjacent, moderately grazed farms. The study was…Publication Date 1999
- invertebrates
- livestock grazing
- Arid rangelands
- Succulent karoo
- biodiversity
- grazing
- livestock
- Africa
- Library Collection RecordA paired site study was conducted of communally grazed eutrophic and dystrophic grasslands and adjacent ungrazed areas of varying periods of exclusion from communal grazing. This allowed…Publication Date 1999
- grasslands
- grazing
- rural areas
- subsistence agriculture
- animal production
- plant production
- biodiversity
- Africa
- Library Collection RecordThis paper presents an overview of the current status, problems and prospects for achieving a better nutrient balance to support varying levels of productivity from the three major livestock systems…Publication Date 1998
- livestock systems
- nutrient management
- Nutrient depletion
- Sub-Saharan Africa
- grazing
- monitoring
- management
- forage quality
- Economic Aspects
- land use
- socio-economic aspects
- Africa
- Library Collection RecordA three-year study was done to determine herbaceous biomass production and its utilization by herbivores in an arid zone inhabited by a largely nomadic population in northern Kenya. The indicator…Publication Date 1998
- grasses
- forbs
- Dwarf Shrubs
- Offtake
- herbivores
- desertification
- nomads
- plant production
- rangelands
- pastoralism
- grazing
- degradation
- decision support systems
- management
- foraging ecology
- Africa
- Library Collection RecordVegetation community structure is a key indicator of long-term vegetation change in semi-arid ecosystems. This study uses ground-based spectral measurements and a canopy reflectance model to…Publication Date 1998
- Botswana
- Earth observation data
- Kalahari
- semi-arid ecosystems
- vegetation community structure
- monitoring
- vegetation dynamics
- modelling
- grazing
- Africa
- Library Collection RecordFifteen environmental variables, among them cattle density (hereafter [`]pressure index'), were measured along grazing gradients of eight boreholes at Olifants Drift in south-eastern Botswana.…Publication Date 1998
- environmental variables
- pressure index
- Grazing gradients
- bush-encroaching
- CANOCO
- boreholes
- encroacher
- cattle
- grazing
- stocking rates
- indigenous encroaching species
- pastoralism
- subsistence agriculture
- Africa
- Library Collection RecordThe significance of encroacher woody plant browse (among other factors) in the composition of the diet of cattle was quantified for July 1996, March 1997 and September 1997. This is important because…Publication Date 1998
- woody encroachers
- woody plant browse
- carrying capacity
- communal rangelands
- crude protein
- D. cinerea
- G. flava
- forage quality
- Forage Quantity
- foraging ecology
- cattle
- grasslands
- grazing
- vegetation dynamics
- ecosystem dynamics
- Africa
- Library Collection RecordSinking boreholes to tap groundwater supplies facilitated expansion of all-year round livestock production into the semi-arid Kalahari. Increased grazing and trampling pres sure around the boreholes…Publication Date 1997
- agriculture
- piosphere
- grazing
- grasslands
- soil erosion
- Soil Condition
- cattle
- watering points
- rainfall
- modelling
- Africa
- Library Collection RecordAn overview is given of pasture evaluation and improvement of existing germplasm in South Africa. The literature is reviewed from the perspective of upgrading the natural vegetation, reclamation of…Publication Date 1997
- Pasture evaluation
- intake
- Supplementation
- nutritive value
- pasture management
- rehabilitation
- erosion
- forage quality
- grazing
- Forage Quantity
- drought
- irrigation
- rainfall
- Africa
- Library Collection RecordWe use a dynamic stochastic simulation model of forage, herbivores, predators and domestic livestock in the Machakos District of Kenya to address policies related to the multiple use of rangeland…Publication Date 1997
- policies
- grazing
- livestock
- land use
- rangelands
- Traditional management
- commercial agriculture
- conservation
- pastoralism
- Forage Quantity
- drought
- Africa
- Library Collection RecordIt has long been recognized that alternative vegetation states may occur in terrestrial grazing systems. This phenomenon may be of great importance as small environmental fluctuations may lead to…Publication Date 1997
- vegetation dynamics
- grazing
- grasslands
- ecosystem ecology
- degradation
- Africa
- Library Collection RecordPortable computers presently allow documentation of real-time grazing behavior under field conditions. Researchers are still challenged, however, with the task of selecting proper and easily recorded…Publication Date 1997
- goat
- ingestive behavior
- grazing
- foraging ecology
- goats
- forage quality
- Africa
- Library Collection RecordFive techniques that are generally used in the western part of the grassland biome of southern Africa were evaluated. The techniques were tested on the mid-slopes (high species diversity) and…Publication Date 1997
- grazing gradient
- Key Species
- forage factors
- ordination
- grasslands
- grazing
- monitoring
- forage quality
- foraging ecology
- degradation
- Africa
- Library Collection RecordRangeland ecologists, particularly those in North America, have traditionally worked with a paradigm founded on the notion of Clementsian succession. This is increasingly being called into question.…Publication Date 1997
- succession
- Climax
- Land Units
- Geomorphology
- environmental factors
- floristic
- physiognomic
- vegetation dynamics
- grazing
- management
- Africa
- Library Collection RecordThe effects of species composition and sward structure on the ingestive behaviour of cattle and sheep grazing a mesic, low quality grassland in South Africa were investigated over the 1990–93…Publication Date 1996
- diet selection
- cattle
- sheep
- grasslands
- grazing
- 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 RecordThe characteristics and dynamics of dry savanna vegetation cover are receiving considerable attention from the perspectives of both global change and range degradation studies. Problems include the…Publication Date 1996
- savanna
- remote sensing
- mapping
- management
- degradation
- grazing
- 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
- Library Collection RecordSavanna landscapes in the dry communal areas of southern Zimbabwe are highlyspatially heterogeneous. This year-long study explores the responses of cattle to variation in the availability of fodder…Publication Date 1995
- foraging behaviour
- cattle movement
- spatial and temporal hererogeneity
- savanna vegetation
- Zimbabwe
- savanna
- foraging ecology
- cattle
- plant production
- forage quality
- management
- grazing
- policies
- Africa
- Library Collection RecordThis paper describes the development of a model for estimating herbage production from rainfall and evapotranspiration in rangelands and its calibration using a vegetation cover index derived from…Publication Date 1995
- rangelands
- modelling
- herbage production
- grazing
- land degradation
- degradation
- plant production
- rainfall
- remote sensing
- rangeland condition
- Africa
- Library Collection RecordThe impact of ecological factors such as changes in rainfall could lead to large compositional changes in the diverse indigenous flora of southern Africa. A study was therefore initiated to determine…Publication Date 1995
- vegetation
- rainfall increase
- rainfall decrease
- southern Africa
- rainfall
- species richness
- biodiversity
- drought
- grazing
- vegetation dynamics
- Africa
- Library Collection RecordThe Integrated System for Plant Dynamics (ISPD) is a comprehensive system in which new and existing data and knowledge are quantitatively or qualitatively used as a basis for range condition and…Publication Date 1995
- Integrated System for Plant Dynamics
- range condition
- grazing capacity
- southern Africa
- Eastern Mixed Bushveld
- grazing
- modelling
- savanna
- rangeland condition
- management
- degradation
- Africa
- Library Collection RecordThe concept of desertification has recently been re-evaluated with two major outcomes. Firstly, the term itself has been reviewed, with most authors concluding that the emotive implications of [`]…Publication Date 1995
- dryland degradation
- stocking rates
- grazing
- land use
- Vegetation Change
- conceptual model
- management
- ecosytem ecology
- vegetation dynamics
- Africa
- Library Collection RecordA general model of rotational grazing is constructed where in each of P consecutive time periods a mob of animals grazes one of m paddocks. The optimal grazing sequence is that which maximises their…Publication Date 1995
- grazing
- management
- livestock
- fodder production
- foraging ecology
- diet selection
- forage quality
- Africa
- Library Collection RecordCows are important agents of geomorphological change. On the uplands, heavy grazing compacts the soil, reduces infiltration, increases runoff, and increases erosion and sediment yield. However, light…Publication Date 1995
- cattle
- ecosystem dynamics
- Soil Condition
- runoff
- soil erosion
- grazing
- modelling
- 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 RecordThis article relates the species pattern and structure of miombo woodland in a deforested peasant farming area of central Zimbabwe to its ecological determinants and its present and past use. Data on…Publication Date 1994
- grasslands
- disturbance
- grazing
- soils
- Africa
- Library Collection RecordThe effects of soil texture and grassland management, i.e. rate of fertilizer N input, mowing vs grazing, and the number of years the site is under grass, on the amounts of soil organic C and N and…Publication Date 1994
- soil nutrients
- grasslands
- management
- Soil Condition
- grazing
- mowing
- 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 RecordSpatial dependence is a fundamental structure of spatial data that can be readily measured. Change in landscapes can be monitored effectively using measures of spatial dependence. Scale of…Publication Date 1993
- grasslands
- grazing
- modelling
- Landsat images
- remote sensing
- Africa
- Library Collection RecordFood plant selection by herbivorous mammals and by harvester ants Messor capensis was compared for three sites differing in past and present management in the southern Karoo, South Africa. At all…Publication Date 1993
- ecology
- seeds
- insects
- grazing
- management
- rangeland condition
- rangelands
- degradation
- Africa
- Library Collection RecordSavanna-grassland ecosystems are highly interactive due to effects among interconnected trophic elements. This can cause disturbance at one level in the trophic web to be propagated through that web…Publication Date 1992
- browsing
- grazing
- rinderpest
- Serengeti
- savanna
- disturbance
- disease
- animal impact
- ecosystem ecology
- Africa
- Library Collection RecordA descriptive study and an experiment were conducted to determine the selectivity of goats Capra hircus) on restricted grazing on a semi-arid temperate rangeland throughout the year. In 1987, a mixed…Publication Date 1992
- diet selection
- goats
- grazing
- rangelands
- 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 Record
236 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 RecordThis paper describes a general economic analysis package, BURNECON, for evaluating the benefits and costs of using management burns to improve grazing potential in the semi-arid woodlands of eastern…Publication Date 1991
- management burns
- prescribed fire
- land management
- microcomputer
- decision support systems
- BURNECON
- Australia
- fire ecology
- management
- grazing
- indigenous encroaching species
- Economic Aspects
- 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 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 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 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 RecordThe past and present distributions of Rudd's lark are reviewed, and recent claims concerning range reduction examined. The species occurs within a geographically and altitudinally restricted…Publication Date 1988
- biodiversity
- grasslands
- birds
- grazing
- land use
- 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 RecordIn a series of three experiments, the effect of offering conserved forage indoors to grazing dairy cows was examined. In Experiment 1, hay was offered ad libitum for 45 min after morning milking. In…Publication Date 1986
- animal production
- animal nutrition
- forage quality
- Forage Quantity
- grazing
- diet selection
- cattle
- Africa
- Library Collection RecordSouth Coast Renosterveld is a small-leaved shrubland confined to the semi-arid and sub-humid coastal forelands of the southern and south-eastern Cape, South Africa. The flora of this vegetation type…Publication Date 1986
- Endemism
- grassland
- management
- rangeland condition
- grazing
- fire ecology
- renosterveld
- 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 RecordAn extensive sensitivity analysis of a model for the Simulation of Production and Utilization on Rangelands (SPUR) was conducted. A perturb and observe approach was employed in a series of fractional…Publication Date 1985
- grasslands
- animal production
- animal nutrition
- plant production
- soil moisture
- grazing
- Soil Condition
- 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 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 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