Rangeland Ecology & Management
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Displaying 151 - 197 of 197 results
- Library Collection RecordIt has been well established that drought frequently emerges in several tropical regions following the onset of El Niño. An important characteristic of such droughts is their spatial extent, which…Publication Date 2006
- drought
- climate change
- El Nino
- rainfall
- Africa
- Library Collection RecordThis study reviewed the distribution of ten common savanna trees in Namibia. Tree distributions were investigated in relation to bioclimatic, topographic and edaphic variables at a national scale.…Publication Date 2006
- biogeography
- climate change
- forestry
- Plant functional attributes
- southern Africa
- Vegetation history
- 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 RecordAnts are increasingly being recognized as useful tools for land managers to monitor ecosystem conditions. However, despite an abundance of studies on ant responses to both environmental disturbance…Publication Date 2006
- climate change
- conservation
- indicator
- invasive
- restoration ecology
- Surrogate
- insects
- Ants
- monitoring
- management
- Alien invasive species
- ecosystem dynamics
- Africa
- Library Collection RecordSummary The West Coast Regional Carbon Sequestration Partnership (WESTCARB) is one of seven partnerships established by the US Department of Energy (DOE) to evaluate carbon dioxide capture, transport…Publication Date 2005
- carbon dioxide
- carbon sequestration
- climate change
- Carbon Sink
- monitoring
- land use
- 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 RecordGlobal environmental change problems due to their unstructured characteristics, being marked by great uncertainties and a big number of stakeholders, prove to be too difficult to solve in a…Publication Date 2005
- stakeholder participation
- learning
- Systems change
- Global environmental change
- Transition management
- management
- stakeholders
- climate change
- socio-economic aspects
- 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 RecordExisting projections of the optimal share of carbon sequestration in an overall portfolio of greenhouse-gas mitigation strategies almost all assume the carbon price to be constant over time. This…Publication Date 2005
- climate change
- carbon sequestration
- forestry
- Carbon price
- Integrated assessment models
- greenhouse gases
- Economic Aspects
- modelling
- Africa
- Library Collection RecordIssues of equity and justice are high on international agendas dealing with the impacts of global climate change. But what are the implications of climate change for equity and justice amongst…Publication Date 2005
- climate change
- adaptation
- Justice
- socio-economic aspects
- subsistence agriculture
- stakeholders
- community based resource management
- Africa
- Library Collection RecordRestoration of degraded soils is a development strategy to reduce desertification, soil erosion and environmental degradation, and alleviate chronic food shortages with great potential in sub-Saharan…Publication Date 2005
- soil organic matter
- soil degradation
- global warming
- soil restoration
- agroforestry
- farming systems
- ecoregions
- Sub-Saharan Africa
- carbon sequestration in soil
- soil organic carbon
- carbon sequestration
- climate change
- restoration ecology
- degradation
- Soil Condition
- desertification
- erosion
- carbon dioxide
- fire ecology
- agriculture
- management
- Africa
- Library Collection RecordAttention has been directed towards both the impacts of future climate change on environmental systems and dunefield activity in the past, but there has been relatively little consideration of…Publication Date 2004
- GCMs
- Dune mobility
- climate change
- Kalahari
- global warming
- Africa
- Library Collection RecordMeasurements of surface ozone in the southern African region are limited to a few active and passive monitoring sites. Over the region, the mean surface ozone concentrations exhibit strong seasonal…Publication Date 2004
- Ozone
- Botswana
- South Africa
- Zimbabwe
- Zambia
- CAPIA
- Cape Point
- monitoring
- climate change
- Africa
- Library Collection RecordThis chapter describes relationships between environmental stress and the reaction of plants thereupon. Plants might react to environmental stress on various levels: on the biochemical, cellular, or…Publication Date 2003
- Autecology
- biodiversity
- character state
- climate change
- ecotoxicology
- effects
- Ellenberg
- flora
- heavy metal
- IEPS
- insecticide
- PAF
- palynology
- photosynthesis
- Synecology
- vascular plants
- vegetation
- southern Africa
- Library Collection RecordResearch on the effects of ozone on agricultural crops and agro-ecosystems is needed for the development of regional emission reduction strategies, to underpin practical recommendations aiming to…Publication Date 2003
- Tropospheric ozone
- Ozone flux
- Ozone risk assessment
- detoxification
- Antioxidants
- Agricultural crops
- grassland
- climate change
- agriculture
- modelling
- plant production
- ecosystem ecology
- carbon dioxide
- Africa
- Library Collection RecordSouth Africa is rich in biological diversity, but measures to conserve this heritage are under-funded and are of relatively low priority at national level. Part of the problem is that the social…Publication Date 2003
- Value of biodiversity
- contingent valuation
- Fynbos
- climate change
- biodiversity
- socio-economic aspects
- Africa
- Library Collection RecordAssessing the impacts of climatic and, in particular, land use changes on rates of soil erosion by water is the objective of many national and international research projects. However, over the last…Publication Date 2003
- gully erosion
- climate change
- land use change
- sediment yield
- techniques
- thresholds
- Flow hydraulics
- rainfall
- topography
- soils
- infiltration
- drainage
- models
- erosion control
- connectivity
- land use
- erosion
- runoff
- Africa
- Library Collection RecordClimate-change induced alterations in the global distribution of cool season (C3) and warm season (C4) grasses would impact the global carbon cycle and have differing, local effects on range and…Publication Date 2003
- C3 and C4 grass distribution
- Global climatic change
- Seasonal water availability
- water use efficiency
- climate change
- temperature
- vegetation dynamics
- rainfall
- Africa
- Library Collection RecordThe age-constrained pollen data of a sedimentary sequence from the crater Lake Masoko, southern Tanzania (9°20'S, 33°45'E, 770 m), display a continuous record of vegetation for the past…Publication Date 2003
- palaeobotany
- pollen
- Late Holocene
- southern Tanzania
- Zambezian woodland
- climate change
- human activity
- Africa
- Library Collection RecordThe tropics cover 8.2 billion hectares or approximately 40% of the world's land area. These regions are characterized by a large portion of the world's rapidly increasing population, high…Publication Date 2002
- carbon dioxide
- carbon dynamics
- carbon sequestration
- Carbon Sink
- greenhouse gases
- climate change
- soils
- socio-economic aspects
- land use
- agriculture
- southern Africa
- Library Collection RecordThis chapter discusses the magnitude and dynamics of the soil organic carbon (SOC) and soil inorganic carbon (SIC) pools. The chapter also describes the impact of different land uses and management…Publication Date 2001
- carbon dioxide
- carbon sequestration
- Carbon Sink
- climate change
- soils
- southern Africa
- Library Collection RecordNo abstract available.Publication Date 2001
- climate change
- carbon sequestration
- monitoring
- soils
- degradation
- southern Africa
- Library Collection Record`Vegetation thickening' often refers to an increasing shrub and tree density on many grazed rangelands, woodlands and forests that may or may not have supported such woody plant populations in…Publication Date 2001
- carbon stocks
- emissions
- land use change
- sequestration
- savanna
- Bush encroachment
- climate change
- Kyoto Protocol
- restoration ecology
- carbon dioxide
- carbon sequestration
- Carbon Sink
- management
- greenhouse gases
- Africa
- Library Collection RecordThe South African Country Study on Climate Change was hosted by the South African National Research Foundation in Pretoria, Gauteng, South Africa, on 22 August 2000.Publication Date 2001
- climate change
- production
- conservation
- vulnerability
- adaptation
- Africa
- Library Collection RecordClimate change is a reality and will affect the poor in developing countries in many ways. The effectiveness of global change research could be substantially improved by linking International…Publication Date 2000
- climate change
- CGIAR
- soil fertility
- carbon sequestration
- Africa
- Library Collection RecordThe scale "jump" in hydrology and agriculture from the small scale at which individual processes such as infiltration, soil water redistribution, evapotranspiration, soil loss or crop…Publication Date 2000
- scale
- scaling
- hydrology
- agriculture
- soil moisture
- climate change
- Economic Aspects
- Africa
- Library Collection RecordThere is significant uncertainty about the effects of global change on the vegetation and animal productivity of pasture and rangeland ecosystems. This paper presents a synthesis of progress made…Publication Date 2000
- climate change
- management
- pastures
- rangelands
- Sensitive regions
- synthesis
- animal production
- plant production
- modelling
- carbon dioxide
- socio-economic aspects
- Africa
- Library Collection RecordThis article describes a greenhouse gas (GHG) emissions scenario for a world that chooses collectively and effectively to pursue service-oriented economic prosperity while taking into account equity…Publication Date 2000
- climate change
- greenhouse gases
- socio-economic aspects
- carbon dioxide
- Africa
- Library Collection RecordA set of global greenhouse gas emission inventories has been compiled per source category for the 1990 annual emissions of the direct greenhouse gases CO2, CH4 and N2O, as well as of the indirect…Publication Date 1999
- global
- emissions
- inventory
- carbon dioxide
- Methane
- nitrous oxide
- Greenhouse gas
- sources
- Country
- Sectors
- greenhouse gases
- mapping
- climate change
- Africa
- Library Collection RecordThe biodiversity convention aims at conserving biodiversity and guaranteeing fair and sustainable human use of biodiversity. The convention further requires that the causes of biodiversity decline…Publication Date 1999
- biodiversity
- climate change
- Earth system modelling
- global change
- Scenarios
- land use
- modelling
- Africa
- Library Collection RecordSeasonal distribution of rainfall is thought to be important in structuring arid and semi-arid plant communities. Controlled studies of rainfall distribution have proven difficult, especially at the…Publication Date 1999
- Artemisia tridintata
- climate change
- rainout shelters
- precipitation distribution
- rainfall
- vegetation dynamics
- ecosystem ecology
- climate
- management
- Africa
- Library Collection RecordDesertification has been recognized as a major environmental problem for more than 20 years. Control of desertification has been the subject of many international efforts; it has been a major focus…Publication Date 1998
- desertification
- United Nations
- land degradation
- climate change
- arid zones
- degradation
- economics
- Africa
- Library Collection RecordThe amount and quality of inputs into soil organic matter will be altered by both climate and landuse change. The increase in growth of plants caused by increasing CO2 concentration implies not only…Publication Date 1997
- elevated carbon dioxide
- Decomposition
- organic residues
- secondary chemicals
- soil organic carbon
- climate change
- land use
- plant autecology
- carbon dioxide
- modelling
- ecosystem dynamics
- ecosystem ecology
- plant production
- management
- Africa
- Library Collection RecordAlteration of land use will continue to be the dominant driver of environmental change in the tropics for the next several decades. It can take the form of fundamental vegetation cover transformation…Publication Date 1997
- global change
- tropical ecosystems
- Land cover
- climate
- atmosphere
- land use
- landscape ecology
- management
- climate change
- ecosystem ecology
- Africa
- Library Collection RecordAbstract 10.1002/qj.49712253008.abs An atmospheric general-circulation model with realistic land-surface properties is used to investigate the climatic effect of doubling the extent of the earth…Publication Date 1996
- climate change
- Climate modelling
- desertification
- Regional climate sensitivity
- Africa
- Library Collection RecordResults of various studies on the origin of Arctic air pollution are reviewed, focusing on what is known about its physical characteristics and chemical composition, as well as on emission sources…Publication Date 1995
- Arctic air pollutants
- emissions
- Origins
- climate change
- Africa
- Library Collection RecordMethane is the most abundant organic chemical in the earth's atmosphere, and its abundance is increasing with time and has reached levels not seen in recent geological history. Methane is…Publication Date 1994
- Methane emissions
- greenhouse gases
- climate change
- cattle
- management
- Africa
- Library Collection RecordThe Pliocene epoch represents an important transition from a climate regime with high-frequency, low-amplitude oscillations when the Northern Hemisphere lacked substantial ice sheets, to the typical…Publication Date 1994
- palaeobotany
- climate change
- Africa
- Library Collection RecordThis paper examines sensitivity of the Southern African subcontinent to climate change. It shows that the region has particularly sensitive water resources. Aridification of the subcontinent will…Publication Date 1994
- climate change
- southern Africa
- drought
- Africa
- Library Collection RecordUsing the methods of direct gradient analysis, we investigated some of the factors responsible for species turnover in the dwarf shrubland/grassland interface of the eastern half of the Nama-Karoo…Publication Date 1994
- grasslands
- soil moisture
- species richness
- rainfall
- environmental factors
- climate change
- management
- Africa
- Library Collection RecordAn analysis tool was developed to simulate primary productivity and crop yields for both present and possible future climate conditions. Southern Africa was delineated into 712 relatively homogeneous…Publication Date 1993
- plant production
- agriculture
- climate change
- soil
- vegetation dynamics
- hydrology
- modelling
- GIS
- rainfall
- socio-economic aspects
- policies
- food security
- Africa
- Library Collection RecordNow that governments are beginning to consider actions to respond to the potential threat of global warming (even if they do not yet believe that it will definitely occur), their representatives…Publication Date 1992
- global warming
- climate change
- Africa
- Library Collection RecordIt is important to know how the increasing atmospheric concentration of carbon dioxide (CO2) will affect growth of agricultural plants. The objective of this study was to determine the effect of…Publication Date 1992
- climate change
- carbon dioxide
- grasslands
- plant autecology
- plant production
- agriculture
- Africa
- Library Collection RecordSummary Following the severe droughts in the Sahel and Ethiopia in the late 1960s and early 1970s, which focused the world's attention on drought and desertification, the United Nations system…Publication Date 1984
- drought
- desertification
- socio-economic aspects
- climate change
- Africa
- Library Collection RecordThe oxygen isotopic composition of modern soil carbonate is well correlated with the isotopic composition of local meteoric water. The carbon isotopic cycle for CO2 in soils can be described in terms…Publication Date 1984
- carbon dioxide
- climate change
- soils
- palaeoclimate
- palaeoecology
- Africa
- Library Collection RecordEmpirical evidence indicates that the magnitude of global warming to be expected from the relase of CO2 into the atmosphere by the burning of fossil fuels has been greatly overestimated by scientists…Publication Date 1983
- management
- carbon dioxide
- climate change
- greenhouse gases
- plant production
- grasslands
- global warming
- Africa
- Library Collection RecordSummary Small dome-shaped hills are recurrent and common landforms associated with plateau surfaces in the savanna woodland landscapes, both to the north and south of the Congo Basin. They may be…Publication Date 1979
- insects
- savanna
- climate change
- ecology
- rainfall
- fire
- Africa