Rangeland Ecology & Management
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Displaying 151 - 200 of 318 results
- Library Collection RecordNo abstract availablePublication Date 2008
- conservation
- management
- ecosystem dynamics
- grasslands
- Africa
- Library Collection RecordComplementary resource use is regarded as a mechanism that contributes to positive relationships between biodiversity and ecosystem functioning. Here, we used a biodiversity experiment composed of…Publication Date 2008
- Arrhenatherum elatius
- Biodiversity effects
- Complementarity
- Light competition
- The Jena Experiment
- Vertical structure
- species richness
- biodiversity
- ecosystem ecology
- grasses
- grasslands
- Africa
- Library Collection RecordPrecision agriculture (PA) is an innovative, int+O101egrated and internationally standardized approach aiming to increase the efficiency of resource use and to reduce the uncertainty of decisions…Publication Date 2008
- precision agriculture
- grassland
- Perspectives
- Constraints
- interdisciplinary research
- grasslands
- remote sensing
- plant production
- Economic Aspects
- agriculture
- decision support systems
- management
- Africa
- Library Collection RecordThis paper describes a procedure for evaluating the desertification risk in threatened areas. The procedure is based on an eight-equation dynamic model of a generic human-resource system that can be…Publication Date 2008
- Desertification risk
- System Dynamics
- Alternative long-term states
- desertification
- modelling
- management
- grasslands
- sustainability
- land use
- Africa
- Library Collection RecordWithin the Kyoto Protocol, the clean development mechanism (CDM) is an instrument intended to reduce greenhouse gas emissions, while assisting developing countries in achieving sustainable…Publication Date 2008
- climate change
- afforestation
- reforestation
- land use
- Spatial modeling
- trees
- forests
- carbon
- CDM-AR
- land use change
- greenhouse gases
- Sustainable development
- socio-economic aspects
- Carbon Sink
- grasslands
- savanna
- food security
- Africa
- Library Collection RecordSummary Grasses are one of the great successes of evolution. They occur in nearly every habitat from impoverished Antarctic wastes to the lush tropics and are dominant over vast stretches of…Publication Date 2007
- fire ecology
- grasslands
- southern Africa
- Library Collection RecordThe ecology of clonal species has rarely been studied in savannas. Dichrostachys cinerea, a common invasive shrub in southern African savannas, forms root suckers. This paper examines the effect of…Publication Date 2007
- Alien invasive species
- plant autecology
- grasslands
- 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 RecordThe relationship between above and belowground species composition has been researched in forests, grasslands, and wetlands to understand what mechanisms control community composition. I thoroughly…Publication Date 2007
- grasslands
- plant community ecology
- plant production
- plant autecology
- species richness
- seed banks
- management
- Africa
- Library Collection RecordPatches of wooded vegetation in nutrient-poor grassland characteristically contain high soil moisture and nutrient availability compared with surrounding grassland. These 'islands of fertility…Publication Date 2007
- grasslands
- soil moisture
- soil nutrients
- soil fertility
- animal impact
- fire
- ecosystem ecology
- Africa
- Library Collection RecordFlood depth has been frequently used to explain the distribution of plant species in seasonally flooded grasslands, but its relation with vegetation production has remained ambiguous. The…Publication Date 2007
- grasslands
- plant production
- hydrology
- plant autecology
- Africa
- Library Collection RecordNo abstract availablePublication Date 2007
- grasslands
- urban environment
- rurla environment
- ecology
- Africa
- Library Collection RecordNo abstract availablePublication Date 2007
- grasslands
- ecosystem ecology
- 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 RecordSummary Vegetation indices generated from remotely sensed data have been widely used to estimate biophysical characteristics of natural vegetation and agricultural crops like aboveground productivity…Publication Date 2007
- grasslands
- surface water
- Spectral response
- vegetation indices
- Emerged biomass
- Africa
- Library Collection RecordThe emergence of C4 grass biomes is believed to have first taken place in the upper Miocene, when a series of events modified global climate with long-lasting impacts on continental biotas. Changes…Publication Date 2007
- Miocene
- Pliocene
- Paleosols
- Tooth enamel
- Ratite eggshell
- grasslands
- palaeobotany
- palaeoclimate
- Africa
- Library Collection RecordThe environmental contexts of the karstic hominin sites in South Africa have been established largely by means of faunal associations; taken together these data suggest a trend from relatively closed…Publication Date 2007
- Environmental change
- grasslands
- [delta]13C
- Fossil enamel
- Plio-Pleistocene
- South Africa
- palaeobotany
- 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 RecordA national-level land degradation risk monitoring system identified an important grazing area in central northern Namibia as an area at risk of environmental change. A time series analysis of primary…Publication Date 2007
- semi-arid
- local knowledge
- rainfall variability
- water supply
- grazing
- land management
- degradation
- data analysis
- grasslands
- livestock
- rainfall
- participatory rural appraisal
- decision support systems
- management
- traditional knowledge
- Africa
- Library Collection RecordThe concentration of foliar nitrogen in tropical grass is one of the factors that explain the distribution of wildlife. Therefore, the remote sensing of foliar nitrogen contributes to a better…Publication Date 2007
- nitrogen concentration
- red edge position
- Continuum removal
- bootstrapping
- chlorophyll absorption feature
- remote sensing
- management
- grasslands
- rangeland condition
- forage quality
- Africa
- Library Collection RecordConserving African wildlife in human-occupied landscapes requires management intervention that is guided by a mechanistic understanding of how anthropogenic factors influence large-scale ecological…Publication Date 2007
- wildlife
- rainfall
- predation
- competition
- apparent competition
- Non-protected area
- management
- conservation
- grasslands
- eco - tourism
- cattle
- Africa
- Library Collection RecordNo abstract availablePublication Date 2007
- insects
- grasslands
- Africa
- Library Collection RecordSummary in English and Afrikaans. Also issued in printed format.Publication Date 2007
- birds
- mammals
- ecology
- grasslands
- diet selection
- ecology
- game animals
- southern Africa
- Library Collection RecordAlso available on CD-ROM. Accompanying map and table in pocket at back of book. (copy one) Accomapnying map and table available on level 3 (copy two) Summary in English and Afrikaans. Vegetation…Publication Date 2007
- ecology
- grasslands
- mapping
- southern Africa
- Library Collection RecordThe effect of livestock type (cattle-to-sheep ratio) and stocking rate on grassland species richness and vegetation composition were tested using two long-term trials in Highland Sourveld Grassland…Publication Date 2007
- grasslands
- grazing
- South Africa
- KwaZulu - Natal
- plant diversity
- grazing
- environmental aspects
- livestock
- cattle
- sheep
- stocking rates
- grassland
- species richness
- fire
- southern Africa
- Library Collection RecordUsing new tools (boosted regression trees) in predictive biogeography, with extensive spatial 23 distribution data for >19 000 species, we developed predictive models for South African plant…Publication Date 2006
- modelling
- species richness
- ecosystem ecology
- Alien invasive species
- grasslands
- Africa
- Library Collection RecordA vegetation survey of natural grasslands was undertaken in the urban areas of Gauteng, supporting about 20% of the country's population. Relevés were compiled in 132 sample plots placed in…Publication Date 2006
- grasslands
- South Africa
- vegetation
- Gauteng
- ecology
- Africa
- Library Collection RecordDegradation in arid and semi-arid regions can be ascribed primarily to environmental conditions such as extreme changes in temperature and erratic rainfall patterns. Seed germination and seedling…Publication Date 2006
- Drought Stress
- polyethylene glycol (PEG)
- restoration
- rangelands
- seeds
- germination
- grasslands
- rainfall
- climate
- drought
- plant autecology
- restoration ecology
- 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 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 RecordHerder knowledge of landscape classification and environmental assessments in East Africa has been poorly documented. This study investigated how the Maasai traditionally classified and assessed…Publication Date 2006
- land degradation
- Livestock grazing preference
- Maasai
- Traditional landscape classification
- traditional knowledge
- subsistence agriculture
- degradation
- grasslands
- grazing
- management
- pastoralism
- soils
- animal impact
- biodiversity
- forage quality
- animal nutrition
- animal production
- monitoring
- Africa
- Library Collection RecordAeolian processes are tightly linked to soil and vegetation change in arid and semi-arid systems at multiple spatial and temporal scales. Wind influences patterns of vegetation and soil within the…Publication Date 2006
- Aeolian processes
- desertification
- Dust emission
- Landscape change
- wind erosion
- erosion
- landscape ecology
- soils
- climate
- ecosystem dynamics
- ecosystem ecology
- grasslands
- Africa
- Library Collection RecordEpidermal conductance (gmin) is water lost through the cuticle and stomata of plants when stomatal conductance is minimal. Low gmin may affect survival of perennial grasses by maintaining tissue…Publication Date 2006
- Cuticular transpiration
- Drought Resistance
- grasslands
- drought
- plant autecology
- Alien invasive species
- Africa
- Library Collection RecordThis paper provides an analysis of the physical and chemical characteristics of cyanobacterial soil crusts in the Molopo Basin, South Africa. It details the influence that soil type, livestock…Publication Date 2006
- cyanobacterial soil crusts
- Kalahari
- soil nutrients
- shrub encroachment
- Acacia mellifera
- soil classification
- livestock
- disturbance
- grasslands
- grazing
- Africa
- Library Collection RecordElevated levels of nitrate in streamwaters draining forested catchments in the eastern escarpment area of South Africa are thought to occur as a result of land use change from natural high altitude…Publication Date 2006
- Nitrogen mineralisation
- nitrification
- nitrogen fixation
- nitrate leaching
- forest soils
- land use
- degradation
- grasslands
- pollution
- nutrient loads
- Soil Condition
- 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 RecordAbstract: The KwaZulu-Natal Drakensberg, South Africa, is predominantly a grassland ecosystem maintained by fire. The effect of the current burning regime on invertebrate and flowering forb diversity…Publication Date 2006
- fire ecology
- grasslands
- ecosystem ecology
- biodiversity
- species richness
- invertebrates
- southern 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 Record
189 GRASSLAND SOILS
No Abstract available.Publication Date 2005- grasslands
- soil
- southern Africa
- Library Collection RecordThis 556-page book examines current grassland problems and issues, and provides an insight into grassland productivity in diverse areas of the world. There is a focus on recent technical advances and…Publication Date 2005
- grasslands
- foraging ecology
- agriculture
- climate change
- biodiversity
- GIS
- pastoralism
- Sustainable development
- Africa
- Library Collection RecordThis book contains a compilation of offered papers presented at the main congress of the XX International Grassland Congress held in University College Dublin, Ireland from 26 June to 1 July, 2005.…Publication Date 2005
- fire ecology
- sustainability
- grasslands
- management
- Africa
- Library Collection RecordAbstract. Question: What is the long-term influence of nutrient availability, productivity and soil pH on grassland community organization? Location: Ukulinga research farm, KwaZulu-Natal, South…Publication Date 2005
- Above-ground production
- fertilization
- Hierarchy of limiting nutrients
- Plant trait
- primary productivity
- Soil acidification
- soil pH
- species richness
- soils
- plant production
- grasslands
- soil nutrients
- ecosystem ecology
- Africa
- Library Collection RecordQuestion: What is the long-term compositional response of brass and forb species to various combinations of burning and mowina? Can these responses be predicted from simple plant traits? Location:…Publication Date 2005
- fire ecology
- grasslands
- mowing
- species richness
- biodiversity
- ecology
- Africa
- Library Collection RecordAbstract C4 photosynthesis had a mid-Tertiary origin that was tied to declining atmospheric CO2, but C4-dominated grasslands did not appear until late Tertiary. According to the 'CO2-threshold…Publication Date 2005
- grasslands
- Miocene
- Paleosols
- photosynthesis
- savannas
- woodlands
- palaeobotany
- Africa
- Library Collection RecordAbstract Carbon sequestration programs, including afforestation and reforestation, are gaining attention globally and will alter many ecosystem processes, including water yield. Some previous…Publication Date 2005
- afforestation
- land-use change
- plantation
- runoff
- water yield
- carbon sequestration
- ecosystem dynamics
- modelling
- grasslands
- rainfall
- hydrology
- Africa
- Library Collection RecordSummary Agriculture has claimed a large share of terrestrial environments in the tropics and subtropics through cultivation of native grasslands or forests. The impact of this anthropogenic change on…Publication Date 2005
- agriculture
- Soil Condition
- grasslands
- land use
- degradation
- management
- Sulphur
- Africa
- Library Collection RecordDuring the dormant winter period the semi-arid grassland areas of South Africa are characterised by planned and unplanned fires, either by lightning or negligence by man. The influence of burning (…Publication Date 2005
- grasslands
- fire ecology
- seed banks
- seeds
- germination
- Africa
- Library Collection RecordChanges in litter production following back and head fires, some soil characteristics and root and litter turnover were quantified over two growing seasons for a semi-arid grassland. Sampling of…Publication Date 2005
- fire ecology
- grasslands
- Soil Condition
- soil moisture
- ecosystem ecology
- Africa
- Library Collection RecordSustainable agriculture requires the formation of new humus from the crops. We utilized 13C and 15N signatures of soil organic matter to assess how rapidly wheat/maize cropping contributed to the…Publication Date 2005
- 13C and 15N
- Duration of arable cropping
- Particle-size fractionation
- Alternating C3/C4 vegetation
- SOM turnover
- C model
- Roth-C Model
- Soil Condition
- plant production
- grasslands
- sustainability
- agriculture
- fertilizer
- Africa
- Library Collection RecordThe remote sensing of fire severity is a noted goal in studies of forest and grassland wildfires. Experiments were conducted to discover and evaluate potential relationships between the…Publication Date 2005
- Fire severity
- savannah
- Surface reflectance
- Char
- nitrogen
- carbon
- Burn severity index
- Linear and non-linear spectral unmixing
- Elemental emission factor
- savanna
- fire ecology
- GIS
- remote sensing
- grasslands
- modelling
- Africa
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