Rangeland Ecology & Management
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Displaying 101 - 150 of 223 results
- 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 role of empiricism in predicting mean annual primary production at the mesoscale is demonstrated through development of a simple model (RESAP) for application over all land surfaces within a…Publication Date 1993
- savanna
- modelling
- plant production
- mapping
- agriculture
- 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 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 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 RecordStrains of Cynodon dactylon (L.) Pers. were collected from six different climatic localities in South Africa. Under controlled conditions the strains were submitted to various environmental stress…Publication Date 1990
- plant autecology
- grasslands
- management
- pasture management
- drought
- plant production
- 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 RecordChromolaena odorata (L.) King & Robinson continues to spread through southeast Asia into the south Pacific, and into central and eastern Africa from the infestations in western and southern…Publication Date 1996
- Chromolaena odorata
- Siam weed
- Africa
- Asia
- Oceania
- Australia
- climate matching
- distribution
- Alien invasive species
- decision support systems
- Phytosociology
- management
- Africa
- Library Collection RecordSpatio-temporal variation in dung beetle distribution and cattle dung dispersal was quantified across a spectrum of summer rainfall habitat types in South Africa, i.e. grassland, open woodland and…Publication Date 1996
- Australia
- dung
- Pasture Improvement
- Scarabaeidae
- South Africa
- dung beetles
- ecosytem ecology
- soils
- rangeland condition
- rainfall
- grasslands
- Africa
- Library Collection RecordThis study examines the variability of the normalized difference vegetation index (NDVI) over Bostwana during the period 1982-1987. Its relationship to rainfall is evaluated from 26 stations…Publication Date 1994
- NDVI values
- rainfall
- soils
- savanna
- plant production
- ecosystem ecology
- Africa
- Library Collection RecordThe spectral behavior of an arid, Lehmann lovegrass (Eragrostis lehmanniana), range canopy with varying quantities of live, green grass, senesced, yellow grass, weathered, gray litter, and different…Publication Date 1987
- grasslands
- remote sensing
- plant production
- soils
- rangeland condition
- NDVI values
- Africa
- Library Collection RecordHand-held MARK-II radiometric measurements were used to estimate biomass yields and nitrogen (N) content of Alicia grass (Cynodon spp.) plots having five levels of nitrogen fertilization. The…Publication Date 1983
- plant autecology
- plant production
- fertilizer
- rangeland condition
- remote sensing
- Africa
- Library Collection RecordA model for estimating soil water content on native rangeland was tested at Sidney, Montana. Based on the Penman combination method for estimating potential ET, the model includes factors to account…Publication Date 1973
- modelling
- soils
- rangeland
- plant production
- management
- Africa
- Library Collection RecordA central goal of ecosystem ecology is to understand how the cycling of nutrients and the growth of organisms are linked. Ecologists have repeatedly observed that nutrient mineralization and plant…Publication Date 2004
- ecosystem ecology
- soil fertility
- soil nutrition
- plant production
- Africa
- Library Collection RecordWe analyzed data sets on phytomass production, basal cover, and monthly precipitation of a semiarid grassland in South Africa for good, medium, and poor rangeland condition (a) to investigate whether…Publication Date 2004
- grasslands
- plant production
- rainfall
- rangeland condition
- modelling
- biomass
- 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 RecordAcross nearly 100 sampling locations widely distributed within the arid shrubland of Western Australia, we demonstrated a general relationship between landscape function, primary productivity and…Publication Date 2002
- landscape function
- resilience
- Landscape degradation
- primary productivity
- indicators
- patch
- patch-mosaic
- ecosystem ecology
- plant production
- rainfall
- grazing
- sheep
- degradation
- Africa
- Library Collection RecordThe debate about the sustainability and productivity of communal lands, especially in comparison with privately managed land, is far from settled. Emerging theories emphasize the spatial and temporal…Publication Date 2000
- Vegetation Change
- vegetation diversity
- semi-arid
- southern Africa
- agropastoralism
- land use
- overgrazing
- Bush encroachment
- soil
- biodiversity
- vegetation dynamics
- indigenous encroaching species
- sustainability
- management
- plant production
- rangeland condition
- rainfall
- Africa
- Library Collection RecordOver a 3 year period, selected sites in three categories of rangeland -- good, moderate and poor -- were subjected to varying levels of frequency and intensity of defoliation. Three watering regimes…Publication Date 1999
- Above-ground phytomass production
- Evapo-transpiration
- intensity of defoliation
- frequency of defoliation
- rangeland condition
- soil water balance
- water-use efficiency
- plant production
- soil moisture
- Africa
- Library Collection RecordWatering points in the semi-arid Kruger National Park, Klaserie Private Nature Reserve, Cleveland Game Park and four game ranches in the Klaserie district were studied. Herbaceous community…Publication Date 2000
- rangeland condition
- watering points
- piosphere
- Kruger National Park
- national parks
- plant production
- Soil Condition
- stocking rates
- vegetation dynamics
- foraging ecology
- 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 work reports on a method using fuzzy membership functions to construct an aggregated interaction matrix in which the summation of variables is scaled according to the way rainfall and soil…Publication Date 1995
- rangelands
- biomass production
- fuzzy sets
- interaction matrix
- models
- aggregated knowledge
- rainfall
- Soil Condition
- soil moisture
- water use efficiency
- plant production
- animal production
- 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 RecordUniversity of Natal , Pietermaritzburg, Doctor of Philosophy in the School of Life and Environmental Sciences.Publication Date 2004
- grasslands
- mangement
- carbon dioxide
- community vegetation studies
- plant production
- water use efficiency
- ecosystem ecology
- Africa
- Library Collection RecordThe well-described pattern of a few common and many rare species in plant communities (dominance-diversity curves) also has been documented within populations of dominant plant species. Understanding…Publication Date 2014
- ecosystem ecology
- plant production
- community dynamics
- genotypes
- competition
- Andropogon gerardii
- competition
- genotype richness
- grassland
- intergenotypic competition
- intragenotypic competition
- light
- neighborhood effects
- nitrogen
- water
- USA
- Library Collection RecordThe objective of this study, which was part of a larger grazing-systems experiment, was to investigate the cumulative impact of three levels of grazing intensity on sward production, utilization and…Publication Date 2014
- grazing
- management
- cows
- dry matter
- plant production
- Economic Aspects
- post-grazing sward height
- tiller density
- rejected area
- leaf yield
- Lolium perenne
- Ireland
- Co. Cork
- Ireland
- Library Collection RecordAnts are a prominent invertebrate group used to assess ecological change in response to disturbance. Their application as a bioindicator group has been particularly widespread in Australia, and a…Publication Date 2010
- Ants
- grazing
- Bioindicator
- land management
- Global patterns
- insects
- grasslands
- rangeland condition
- disturbance
- management
- Australia
- Library Collection RecordOn rangelands, uneven or unmanaged livestock distribution can adversely affect plant community composition, riparian function, or displace wildlife. These issues have historic precedents and are…Publication Date 2009
- range management
- grazing behaviour
- forage selection
- standing crop
- management
- grasslands
- plant production
- forage quality
- cattle
- grazing
- Burns
- Oregon
- USA
- Library Collection RecordFirst page of Land, Food, and Biodiversity Agriculture currently occupies over 40% of Earth's land area and consumes 70% of available freshwater. Production systems have increased food output in…Publication Date 2011
- biodiversity
- animal production
- plant production
- Economic Aspects
- ecology
- conservation
- land use
- management
- Library Collection Record1. Plant diversity has profound effects on primary production. Plant diversity has been shown to correlate with increased primary production in nutrient-limited grassland ecosystems. This…Publication Date 2010
- ecosystem ecology
- grassland
- biodiversity
- determinants of plant community diversity and structure
- ecosystem functioning
- niche differentiation
- Nutrient depletion
- root ecology
- root interactions
- species interactions
- soil nutrients
- soil organic matter
- plant production
- Library Collection RecordThis paper examines if post-fire deferment and periodic rests provided by rotational grazing allowed for more rapid recovery of soil cover, soil chemical and physical parameters, and vegetation…Publication Date 2010
- grazing management
- infiltration
- prescribed burning
- soil health
- summer fire
- rangeland restoration
- Soil Condition
- management
- grazing
- fire ecology
- plant production
- plant community ecology
- rangeland condition
- rangelands
- Texas
- USA
- Library Collection RecordIn the seasonally dry tropics the productivity of grazing cattle is often constrained by nutrition, particularly during the dry season. An experiment during 2 annual cycles estimated the diet…Publication Date 2010
- diet selection
- Diet CP
- Diet DM digestibility
- animal nutrition
- animal production
- cattle
- forage quality
- north Queensland
- Australia
- Library Collection Record1. Annual above-ground net primary productivity (ANPP) in mesic grasslands is known to be highly temporally variable. While yearly precipitation or average yearly temperature can explain some of this…Publication Date 2011
- grasslands
- rainfall
- temperature
- plant production
- C4 grasses
- ecosystem ecology
- climate variability
- dominant species
- inflorescence
- intra-annual variation
- plant-climate interactions
- precipitation
- structural equation modelling
- tallgrass prairie
- temperature
- Kansas
- USA
- Library Collection RecordOvergrazing and mismanagement of rangelands, climate change, drought and [`]salinisation of lands are threatening the sustainability of production systems and the fertility of cropping lands…Publication Date 2010
- Atriplex nummularia L.
- Fodder potential
- sheep
- goats
- Australia
- West Asia
- North Africa
- Library Collection RecordThe effects of inter-cutting interval on biomass yield, growth components and chemical composition of napiergrass (Pennisetum purpureum Schumach) as a source of bioenergy was investigated over 1 year…Publication Date 2011
- bioenergy
- plant production
- dry matter
- Economic Aspects
- biomass yield
- chemical composition
- cutting interval
- napiergrass
- Thailand
- Library Collection RecordThe invasion of exotic grasses into savannas is occurring globally. Despite threats to ecosystem processes and biodiversity, few studies have investigated factors that facilitate invasion success. *…Publication Date 2013
- cattle grazing
- exotic grass
- facilitation
- grass-fire cycle
- savanna
- wind dispersal
- grazing
- Alien invasive species
- ecosystem ecology
- restoration ecology
- Cenchrus ciliaris
- grasses
- fire ecology
- grazing
- soils
- rainfall
- drought
- Queensland
- Australia
- Library Collection RecordAbstract Several multi-year biodiversity experiments have shown positive species richness-productivity relationships which strengthen over time, but the mechanisms which control productivity are not…Publication Date 2013
- biomass production
- Community mean traits
- environmental filtering
- functional diversity
- niche differentiation
- Species identity
- biodiversity
- grasslands
- community analysis
- vegetation dynamics
- species richness
- plant production
- ecosystem ecology
- Thuringia
- Germany
- Library Collection RecordA simulation model was used to determine the ecological and economic consequences of managing stocking rate on semi-arid savanna rangeland continuously stocked with livestock to achieve the alternate…Publication Date 2009
- continuous grazing
- ranching systems
- range condition
- semi-arid
- stocking rates
- sustainability
- Economic Aspects
- grazing
- savanna
- rangeland condition
- management
- rainfall
- indigenous encroaching species
- animal production
- modelling
- plant production
- Library Collection RecordThis study aimed to estimate green herbage biomass (GBM) and crude protein (CP) concentrations of a mixed-sown pasture in Hokkaido, Japan using ground based hyperspectral measurements and…Publication Date 2011
- plant production
- fodder quality
- pastures
- management
- grazing
- geostatistical analysis
- herbage biomass
- Herbage Quality
- hyperspectral measurement
- mapping
- Hokkaido
- Japan
- Library Collection Record1. While positive effects of biodiversity on temporal stability of communities have been demonstrated in theoretical and empirical studies, diversity -stability relationships at the population level…Publication Date 2011
- grasslands
- biodiversity
- ecosystem ecology
- covariance
- plant population and community dynamics
- population stability
- synchrony
- temporal stability
- species richness
- plant production
- Thuringia
- Germany
- Library Collection RecordTermites are estimated to contribute between 60;5 and 19% of the global methane (CH4) emissions. These estimates have large uncertainties because of the limited number of field-based studies and…Publication Date 2011
- Termites
- savanna
- Diurnal CH4 flux
- Seasonal CH4 flux
- Mound temperature
- Mound water content
- greenhouse gases
- insects
- November 2012
- Northern Territory
- Australia
- Library Collection RecordPastoral-based animal production systems are under increasing pressure to provide the high quantity and quality of feed needed for optimal ruminant performance. The capacity of farmers to increase…Publication Date 2011
- pasture
- greenhouse gases
- management
- plant production
- forage breeding
- fitness
- pasture persistence
- trait expression
- respiration
- cultivar evaluation
- forage quality
- breeding targets
- WSC
- environmental impact
- New Zealand
- Library Collection RecordAn important issue in plant ecology is the extent to which functional traits that explain patterns at one organizational level serve as explanatory variables at higher levels, while a related subject…Publication Date 2011
- plant traits
- Individual level
- Population level
- Abandonment
- mowing
- Meadow
- ecosystem ecology
- plant functional traits
- mowing
- simulated grazing
- plant production
- pastures
- Czech Republic
- Library Collection RecordSmooth bromegrass (Bromus inermis Leyss.), meadow bromegrass (Bromus riparius Rehm.) and hybrid bromegrass (B. riparius x B. inermis) are widely used for hay and pasture in temperate regions of the…Publication Date 2011
- pastures
- plant production
- management
- plant physiology
- grasses
- Bromegrass
- defoliation
- etiolated regrowth
- remobilization of stored reserves
- Saskatoon
- Canada
- Library Collection RecordThe savannah of central Brazil occupies 208 million ha, of which about 54 million ha have been converted to cultivated pasture. The aim of this study was to provide the dynamics of evapotranspiration…Publication Date 2011
- savanna
- pasture
- evapotranspiration
- rainfall
- plant production
- Brachiaria brizantha
- Cerrado biome
- eddy covariance
- decoupling factor
- Brazil
- South America
- Library Collection RecordQuestions During restoration of bare subsoil, are planted grassland communities with low species richness more susceptible to invasion by non-residents than communities augmented by additional…Publication Date 2013
- diversity
- dominance
- Early Succession
- Elymus virginicus
- evenness
- functional type
- grassland restoration
- invasion resistance
- restoration ecology
- Alien invasive species
- species richness
- grasslands
- plant production
- Lexington
- Virginia
- USA
- Library Collection Record1. While previous studies have demonstrated rapid evolution in introduced plants and animals, most focus on single species. They are therefore unable to show whether these are special cases, or if…Publication Date 2011
- Alien invasive species
- exotic plant
- herbarium specimen
- invasion ecology
- leaf area
- leaf mass per area
- leaf shape
- morphological change
- plant height
- New South Wales
- Australia
- Library Collection RecordIncreasing plant species diversity in grasslands may improve productivity and stability of yields. In a field experiment, we investigated the herbage dry-matter (DM) yield and crude protein content…Publication Date 2014
- plant production
- grasslands
- Dry Matter Yield
- legumes
- management
- fertiliser
- soil fertility
- multispecies mixtures
- cutting
- grazing
- grass-clover
- Trifolium pratense
- Trifolium repens
- Jutland
- Denmark
- Library Collection RecordStudies of facilitative interactions as drivers of plant richness along environmental gradients often assume the existence of an overarching stress gradient that equally affects the performance of…Publication Date 2011
- Competitive exclusion model
- Niche expansion
- Niche segregation
- plant-plant interactions
- Richness-biomass relationship
- Stress-gradient hypothesis
- species diversity
- ecosystem ecology
- rainfall
- Spain
- Australia
- Library Collection RecordThe effects of summer-to-winter simulated grazing management factors, namely defoliation interval (INT: 21, 42, 56 or 84 d), defoliation height (DH: 2·7, 3·6, 5·3 or 6·0 cm) and final defoliation…Publication Date 2014
- grazing
- management
- plant production
- fodder production
- pastures
- white clover
- perennial ryegrass
- defoliation
- Interval
- height
- closing date
- Ireland