Rangeland Ecology & Management
Get reliable science
Toggle Search
Result Type
Collection
Keywords
Document Type
Displaying 1 - 50 of 310 results
- Library Collection RecordMapping the distribution and abundance of invasive plants is a high priority, but establishing cost-effective and practical techniques at appropriate scales remains elusive. Mesquite is a highly…Publication Date 2007-07-01
- aerial surveys
- Australia
- invasive plants
- mapping
- monitoring costs
- remote sensing
- visual estimation techniques
- Library Collection RecordGrazing cattle and timber harvest are common practices associated with forested rangelands. Therefore, the objective was to document the effects of timber harvest and herbivory on nutritional quality…Publication Date 2007-03-01
- Abies grandis
- beef cattle
- botanical composition
- diet quality
- Pinus ponderosa
- Library Collection RecordA rapid and reproducible method to determine botanical composition of forage is an ecological and economic goal for range animal ecologists. Multidimensional fluorometry previously demonstrated the…Publication Date 2006-09-01
- botanical composition
- fluorescence spectroscopy
- poisonous plants
- Principal Component Analysis (PCA)
- Library Collection RecordA study was conducted to test the hypothesis that Granadina goats are better suited than Nubian goats to utilize the forage resources of the Chihuahuan desert range. Diet composition (…Publication Date 2004-11-01
- botanical composition
- diet preference
- grazing pattern
- goat breeds
- microhistological analysis
- Library Collection RecordDiet selection by juvenile and adult non-pregnant, non-lactating goats and the diets of adult non-productive goats with low (≤ 1.5; grading scale 0-5) and moderate (≥ 2.5) body condition score (BCS)…Publication Date 2004-09-01
- Chihuahuan Desert
- botanical composition
- range
- preference
- foraging
- Library Collection RecordFertilizer application enable producers to influence pasture production. The effect of N fertilization on grass production and leguminous plant content of pasture and strategic N application has…Publication Date 2004-05-01
- clover
- nutrients
- botanical composition
- Library Collection RecordPalatability of shrub sprouts to white-tailed deer (Odocoileus virginianus Raf.) differs among species, which causes selective browsing and can shift shrub species composition to dominance by less…Publication Date 2003-11-01
- sprouts
- shrublands
- brush control
- palatability
- Texas
- botanical composition
- wildlife food habits
- Acacia rigidula
- blackbrush acacia
- brush management
- Celtis pallida
- spiny hackberry
- white-tailed deer
- Library Collection RecordUnderstanding landscape conversion is vital for assessing the impacts of ecological and anthropogenic disturbances at regional and global scales. Since rangelands cover nearly half of the global land…Publication Date 2003-09-01
- environmental degradation
- land use change
- anthropogenic activities
- vegetation cover
- urbanization
- shrublands
- landscape ecology
- Prosopis
- image analysis
- urban areas
- rural areas
- remote sensing
- vegetation types
- semiarid zones
- botanical composition
- rangelands
- grasses
- Arizona
- land conversion
- landscape indices
- fire suppression
- rangeland maintenance
- semiarid
- grasslands
- Library Collection RecordWe investigated the use of prairie dog towns by cattle (Bos taurus) on the shortgrass steppe of northeastern Colorado by conducting surveys of cattle and vegetation from June to August 1999. Cattle…Publication Date 2003-09-01
- Vulpia
- shortgrass steppe
- Aristida purpurea var. longiseta
- Cynomys ludovicianus
- Sphaeralcea coccinea
- vegetation cover
- habitat preferences
- Buchloe dactyloides
- Carex
- Pascopyrum smithii
- Bouteloua gracilis
- prairies
- botanical composition
- grazing
- Colorado
- beef cattle
- feeding preferences
- cattle
- prairie dogs
- shortgrass steppe
- Library Collection RecordThe U.S. Army is responsible for preparing a well-trained combat force while maintaining the ecological diversity and integrity of the lands it manages. The ability to efficiently collect data that…Publication Date 2003-09-01
- Elymus caninus
- Land Condition-Trend Analysis
- quadrat sampling
- military lands
- Helianthus
- Artemisia frigida
- data collection
- environmental monitoring
- Bromus inermis
- land management
- Carex
- Poa pratensis
- sampling
- forbs
- Bouteloua gracilis
- plant communities
- prairies
- botanical composition
- rangelands
- Stipa
- North Dakota
- diversity
- species richness
- grassland vegetation
- plant community
- prairies
- Land Coalition Trend Analysis
- Library Collection RecordCommunity-level (per unit area) and individual tiller reproductive biomass inside and outside of long-term exclosures on the northern winter range of Yellowstone National Park, USA were compared.…Publication Date 2003-09-01
- Yellowstone National Park
- bison
- seed productivity
- Cervus elaphus
- winter
- Antilocapra americana
- tillering
- Wyoming
- grazing intensity
- biomass
- botanical composition
- rangelands
- defoliation
- literature reviews
- grasses
- grasslands
- ungulates
- grazing
- clipping
- seed production and yield
- Yellowstone National Park
- literature reviews
- Library Collection RecordTo quantify the effects of season of use on beef cattle distribution relative to the riparian area, 52 cow/calf pairs were used to evaluate 1) early summer grazing (mid-June to mid-July), and 2) late…Publication Date 2003-07-01
- water requirements
- late summer
- lactation
- early summer
- streams
- nutrient content
- highlands
- water intake
- riparian areas
- calves
- ambient temperature
- forage quality
- stocking rate
- beef cows
- Oregon
- summer
- spatial distribution
- range management
- seasonal variation
- botanical composition
- grazing
- beef cattle
- feeding preferences
- beef cattle
- distribution patterns
- riparian areas
- season of use
- vegetation utilization
- Library Collection RecordThe study analyzed the basal area and density of perennial grasses along a cattle grazing intensity gradient away from a water development. Several mechanisms explaining combinations of changes in…Publication Date 2003-07-01
- Aristida
- Chloris
- Aristida inversa
- Aristida mendocina
- Chloris castilloniana
- shrublands
- basal area
- population density
- savannas
- grazing intensity
- range management
- Argentina
- botanical composition
- beef cattle
- distance from water
- basal area
- plant density
- Library Collection RecordNative grasslands are a sink for atmospheric CO2 sequestration, but ways for extending site-specific CO2 flux measurements to a regional scale are lacking. Objectives of this study were to determine…Publication Date 2003-07-01
- carbon sequestration
- biogeochemical cycles
- evapotranspiration
- remote sensing
- carbon dioxide
- leaf area index
- vegetation
- precipitation
- shrubs
- semiarid zones
- prairies
- biomass
- range management
- seasonal variation
- botanical composition
- grazing
- North Dakota
- global carbon cycle
- rangelands
- Bowen ratio
- remote sensing
- sequestration
- Library Collection RecordThe Universal Soil Loss Equation (USLE) and the Revised Universal Soil Loss Equation (RUSLE 1.06) were evaluated with rainfall simulation data from a diverse set of rangeland vegetation types (8…Publication Date 2003-05-01
- Western United States
- soil erosion
- soil types
- accuracy
- Universal Soil Loss Equation
- Revised Universal Soil Loss Equation
- rainfall simulation
- hydrologic models
- prediction
- precipitation
- plant communities
- range management
- botanical composition
- rangelands
- erosion models
- sheet and rill erosion
- rainfall simulation experiments
- rangeland health
- Library Collection RecordPrescribed cattle grazing is often used to purposely enhance wildlife habitat. This study investigated the effects of fall cattle (Bos taurus) grazing intensity on elk (Cervus elaphus) and deer (…Publication Date 2003-05-01
- wildlife-livestock relations
- Festuca altaica
- Cervus elaphus
- spring
- forbs
- rotational grazing
- summer
- grazing intensity
- Odocoileus
- cattle
- wildlife management
- biomass
- range management
- botanical composition
- Montana
- Cervus elaphus
- Festuca scabrella
- Odocoileus spp.
- livestock-wildlife relations
- prescribed livestock grading
- Library Collection RecordAn experimental design required burn treatments for 10-m2 circular plots. We constructed a fire enclosure for the plots using sheetmetal, electrical conduit, and other commonly available materials.…Publication Date 2003-05-01
- peak temperature
- experimental rigs
- field experimentation
- soil temperature
- fire ecology
- prescribed burning
- range management
- botanical composition
- Nevada
- Utah
- fire
- Great Basin
- sagebrush
- burn barrell
- temperature
- temperature monitoring
- Library Collection RecordElk sedge (Carex geyeri Boott) is one of the most important livestock and big game forages in many areas of the western U.S. It is one of the most prominent forage species in the diets of cattle and…Publication Date 2003-01-01
- Physocarpus opulifolius
- date
- Festuca
- Carex geyeri
- Carex
- protein content
- Pinus ponderosa
- fiber content
- Pseudotsuga menziesii
- chemical composition
- Oregon
- crude protein
- plant communities
- phenology
- seasonal variation
- botanical composition
- nutritive value
- forage
- Carex geyeri
- cattle
- graminoids
- nutrition
- phenology
- season
- Library Collection RecordThe development of successful regional or national invasive weed control programs is often hampered by the way the problem is approached. Typically weed control programs are developed and evaluated…Publication Date 2003-01-01
- Aphthona
- Aphthona nigriscutis
- Aphthona lacertosa
- perennial weeds
- teamwork
- biological control agents
- USDA
- integrated pest management
- economic impact
- biological control
- Euphorbia esula
- ranching
- cost-benefit analysis
- invasion
- herbicides
- weed control
- South Dakota
- chemical control
- Wyoming
- sheep
- range management
- botanical composition
- Montana
- grazing
- North Dakota
- biological control
- Aphthona
- Weeds
- invasive species
- success
- integrated pest management
- Library Collection RecordFood habits of plains vizcacha (Lagostomus maximus), greater rhea (Rhea americana) and cattle (Bos taurus) in the Parana? River Delta, Argentina, were studied over 2 years using microhistological…Publication Date 2003-01-01
- Rhea
- Prosopis nigra
- Rhea americana
- ecological competition
- Lagostomus maximus
- vertebrate pests
- forage legumes
- wetlands
- feces composition
- forbs
- diet
- shrubs
- cattle
- seasonal variation
- Argentina
- botanical composition
- pasture plants
- grazing
- grasses
- diet composition
- herbivory
- Lagostomus maximus
- Paraná River Delta
- Rhea americana
- Library Collection RecordAfter wildfires in 1996 in the sagebrush (Artemisia spp.) and pinyon-juniper (Pinus spp.–Juniperus spp.) zones of west-central Utah, the USDI-BLM attempted to reduce soil erosion and cheatgrass…Publication Date 2003-01-01
- aerial sowing
- revegetation plants
- erosion control
- rehabilitation
- biodiversity
- Elytrigia intermedia subsp. intermedia
- sowing
- wildfire management
- sown grasslands
- Artemisia
- species diversity
- Agropyron cristatum
- weed control
- fires
- fire effects
- Bromus tectorum
- plant communities
- botanical composition
- Pinus
- Juniperus
- plant competition
- invasive species
- Utah
- Elytrigia elongata
- Bureau of Land Management
- rehabilitation
- chaining
- serial seeding
- plant material
- cheatgrass
- Library Collection RecordThere are several generalizations or assumptions concerning rangeland hydrology and erosion relationships found in the literature and in the management arena. These generalizations have found their…Publication Date 2002-11-01
- sheet erosion
- mixed-grass prairies
- tallgrass prairie
- rangeland soils
- Rocky Mountain region
- hydrology
- ground cover
- semiarid grasslands
- Artemisia
- mathematical models
- Carex
- brush control
- steppe soils
- range condition
- equations
- shortgrass prairie
- runoff
- rainfall simulators
- forbs
- soil water content
- plant communities
- California
- prairies
- biomass
- sediment yield
- plant litter
- botanical composition
- rangelands
- canopy
- infiltration
- grasses
- prairie soils
- rangeland hydrology
- infiltration
- erosion
- hydrologic modeling
- Library Collection RecordWe used microhistological analyses of fresh fecal pellets to determine seasonal diets of desert bighorn sheep (Ovis canadensis mexicana Merriam 1901) in northwestern Sonora, Mexico from April 1997 to…Publication Date 2002-11-01
- species reintroduction
- Ovis canadensis mexicana
- Ovis canadensis
- browse plants
- gender differences
- Mexico
- feces composition
- forbs
- diets
- wildlife management
- seasonal variation
- botanical composition
- browsing
- grasses
- Ovis canadensis mexicana
- sexual segregation
- Library Collection RecordRangeland plant productivity and species composition are affected by moisture availability and grazing intensity. We examined warm- and cool-season grass productivity and relative distribution on…Publication Date 2002-09-01
- root systems
- soil water content
- Pascopyrum smithii
- Bouteloua gracilis
- precipitation
- Wyoming
- grazing intensity
- biomass
- seasonal variation
- botanical composition
- mixed-grass prairies
- species composition
- water stress
- Library Collection RecordFires were once a natural part of most savanna ecosystems, but lack of fine fuel and an active suppression policy have changed fire frequency and seasonality. Re-introducing fires to these systems…Publication Date 2002-09-01
- fire intensity
- Acacia
- shrublands
- Prosopis glandulosa
- brush control
- savannas
- ecological succession
- population structure
- shortgrass prairie
- prescribed burning
- forbs
- plant density
- Texas
- botanical composition
- canopy
- grasses
- fire frequency
- seasonality
- prescribed burns
- Prosopis glandulosa
- Acacia
- detrended correspondence analysis
- ordination
- Library Collection RecordBlack-tailed prairie dogs have declined by 98% in the past century. Due to continued declines, the U. S. Fish and Wildlife Service designated the species as a candidate for listing in 2000. Prairie…Publication Date 2002-09-01
- Aristida purpurea
- Cynomys ludovicianus
- Bouteloua curtipendula
- Buchloe dactyloides
- habitats
- Kansas
- species diversity
- shortgrass prairie
- vegetation
- Bouteloua gracilis
- plant density
- botanical composition
- canopy
- Colorado
- black-tailed prairie dogs
- Cynomys ludovicianus
- cover
- bare ground
- frequency
- shortgrass prairie
- herbivory
- soil disturbance
- Library Collection RecordA grazing system which allows cattle to select a season-long diet more nearly meeting their nutrient requirements should facilitate optimal weight gains. A study was conducted near Mandan, N. D.…Publication Date 2002-09-01
- native ranges
- Bromus inermis
- Agropyron desertorum
- protein content
- liveweight gain
- fiber content
- chemical composition
- pastures
- Pascopyrum smithii
- in vitro digestibility
- botanical composition
- grazing
- beef cattle
- feeding preferences
- North Dakota
- animal behavior
- crested wheatgrass
- western wheatgrass
- smooth bromegrass
- Library Collection RecordRangeland ecological condition was monitored over a 48 year period on 41 sites on Bureau of Land Management rangelands scattered across 6 counties in southwestern New Mexico. All sites were grazed by…Publication Date 2002-07-01
- arid grasslands
- ground cover
- semiarid grasslands
- range condition
- precipitation
- sustainability
- grazing intensity
- plant communities
- drought
- range management
- botanical composition
- New Mexico
- beef cattle
- rangeland condition
- succession
- drought
- grazing management
- plant ecology
- Library Collection RecordChanges in rangeland species composition can effect forage quality, ecosystem function, and biological diversity. Unfortunately, documenting species compositional change is difficult due to a lack of…Publication Date 2002-07-01
- sown grasslands
- habitats
- Quercus
- woodland grasslands
- species diversity
- ecological succession
- invasion
- grazing intensity
- California
- range management
- botanical composition
- invasive species
- Northwest California
- herbarium
- oak woodlands
- livestock
- flora
- invasive species
- Library Collection RecordThe Mixed Prairie plant communities developed with the influences of fire and grazing. Available evidence suggests that removal of these disturbances could cause succession toward a more mesic type…Publication Date 2002-05-01
- A horizons
- carbon
- chernozemic soils
- solonetzic soils
- soil depth
- species diversity
- range condition
- Alberta
- nitrogen
- phosphorus
- pH
- grazing intensity
- soil chemistry
- prairies
- biomass
- plant litter
- botanical composition
- soil water
- soil nitrogen
- soil depth
- botanical composition
- plant biomass
- plant nitrogen
- Library Collection RecordA 3-year study was conducted to evaluate grazing strategies for production of growing cattle during summer on Northern Great Plains rangeland. Crossbred yearling steers (N = 123 per year, avg initial…Publication Date 2002-03-01
- liveweight gain
- body weight
- fiber content
- stocking rate
- steers
- crude protein
- natural grasslands
- summer
- precipitation
- grazing intensity
- in vitro digestibility
- biomass
- botanical composition
- Montana
- beef cattle
- forage
- grazing management
- beef cattle
- protein supplementation
- Library Collection RecordInformed management of large herbivores depends largely on how well habitat availability and suitability are understood. The aims of the study were to quantify and map the distribution of sour and…Publication Date 2002-03-01
- game reserves
- sourveld
- mixed veld
- game animals
- mapping
- habitat selection
- habitats
- satellite imagery
- multispectral imagery
- South Africa
- veld
- natural grasslands
- plant communities
- wildlife management
- biomass
- botanical composition
- wildlife
- GIS
- remote sensing
- Landsat
- ground-truthing
- Library Collection RecordIn August 1994, wildfire burned 6,500 ha of native Dry Mixed Prairie in southeastern Alberta. The following year, a study was initiated to monitor the recovery of major plant communities. Burning was…Publication Date 2002-03-01
- Koeleria macrantha
- Elymus lanceolatus
- Hesperostipa comata
- wildfire management
- Agropyron
- ground cover
- fires
- fire effects
- Alberta
- forbs
- Pascopyrum smithii
- Bouteloua gracilis
- precipitation
- biomass production
- grazing intensity
- prairies
- drought
- range management
- plant litter
- botanical composition
- canopy
- grazing
- grasses
- beef cattle
- Stipa
- composition
- forage
- litter
- preference
- production
- topography
- Library Collection RecordA revegetation techniques study was initiated during the fall of 1976 in northwestern Colorado in a disturbed sagebrush (Artemisia tridentata Nutt.) community. The study included 2 irrigation…Publication Date 2001-11-01
- seed mixtures
- irrigated conditions
- plant introduction
- sowing
- sown grasslands
- semiarid grasslands
- stand establishment
- species diversity
- ecological succession
- forbs
- Artemisia tridentata
- plant communities
- shrubs
- land restoration
- application rates
- fertilizer
- biomass
- introduced species
- botanical composition
- grasses
- Colorado
- seeding
- seed mixtures
- fertilization
- irrigation
- succession
- reclamation
- restoration
- Library Collection RecordThere has been increasing concern that training on military lands results in excessive soil erosion, ecosystem degradation, and loss of sustainable training resources. Vegetation structure has been…Publication Date 2001-11-01
- wind erosion
- wind tunnels
- military areas
- battletanks
- tracked vehicles
- all-terrain vehicles
- grassland condition
- surface roughness
- ground cover
- ground vegetation
- Idaho
- forbs
- losses from soil
- plant litter
- botanical composition
- grasses
- erosion
- threshold friction velocity
- threshold wind speed
- arid lands
- surface roughness
- military lands
- wind tunnels
- Library Collection RecordSand shinnery oak (Quercus havardii Rydb.) communities are shrublands extending from northern Texas and western Oklahoma southward into the Chihuahuan Desert. They are dominated by sand shinnery oak…Publication Date 2001-11-01
- brush control
- fire ecology
- fires
- fire effects
- Quercus havardii
- prescribed burning
- Oklahoma
- plant communities
- shrubs
- range management
- botanical composition
- plant competition
- canopy
- plant height
- lesser prairie-chicken
- northern bobwhite
- prairies
- shrublands
- succession
- stability
- vegetation structure
- woody plants
- Library Collection RecordExcessive cover of juniper (Juniperus pinchotii Sudw.) reduces forage production, interferes with livestock management, and diminishes the watershed and wildlife habitat values of rangelands. We…Publication Date 2001-11-01
- basal area
- Juniperus pinchotii
- Bouteloua curtipendula
- Buchloe dactyloides
- Hilaria mutica
- soil temperature
- Prosopis glandulosa
- soil fertility
- invasion
- weed control
- seedlings
- growth rate
- Texas
- botanical composition
- plant competition
- canopy
- plant height
- competition
- facilitation
- mesquite rangeland
- seedling establishment
- Library Collection RecordThe amount and temporal distribution of precipitation received is of critical importance for regrowth and plant production on rangelands. The effects of drought in the autumn, and spring/summer, as…Publication Date 2001-09-01
- Turkey (country)
- Festuca ovina
- autumn
- ground cover
- semiarid grasslands
- temporal variation
- rain
- water-use efficiency
- spring
- regrowth
- crude protein
- drought injury
- biomass production
- semiarid zones
- drought
- botanical composition
- rangelands
- canopy
- grasses
- Festuca ovina
- water use efficiency (WUE)
- biomass
- botanical composition
- protein
- Library Collection RecordWhile considerable attention has been given to the areal expansion of juniper (Juniperus sp.) in the western United States, the presence and ecological significance of old-growth juniper communities…Publication Date 2001-09-01
- eolian soils
- terrain
- tree age
- seral stages
- stand density
- disturbed soils
- stand structure
- soil depth
- ground cover
- understory
- climax communities
- stand characteristics
- sandy soils
- species diversity
- Juniperus occidentalis
- slope
- aspect
- Oregon
- plant communities
- plant litter
- botanical composition
- canopy
- soil texture
- altitude
- Juniperus occidentalis
- structures
- pinyon-juniper
- Library Collection RecordAccurately identifying the botanical composition of free-ranging animal diets remains a challenge. Currently accepted procedures are time consuming, many requiring painstaking sample preparation…Publication Date 2001-07-01
- fluorescence
- lambs
- wavelengths
- methodology
- evaluation
- light intensity
- feces composition
- feces
- statistical analysis
- selective grazing
- feeds
- botanical composition
- forage
- feed intake
- cattle
- botanical composition
- fluorescence
- xenon fluorometry
- fecal fluorophores
- Library Collection RecordLeafy spurge (Euphorbia esula L.) reduces northern Great Plains rangeland carrying capacity. Treatment strategies were evaluated that suppressed leafy spurge and facilitated establishment of mixtures…Publication Date 2001-07-01
- dry matter accumulation
- legumes
- Infestation
- glyphosate
- carrying capacity
- Euphorbia esula
- species diversity
- weed control
- Nebraska
- land restoration
- plant density
- establishment
- prairies
- botanical composition
- rangelands
- grasses
- prescribed fire
- grassland restoration
- imazapic
- glyphosate
- warm-season grasses
- cool-season grasses
- legumes
- invasive plants
- Library Collection RecordA classification of dietary structural types that represents different arrangements of forage classes is proposed. It may be especially useful for interpreting and comparing herbivore diets from…Publication Date 2001-07-01
- Lama guanicoe
- feces composition
- pastures
- selective grazing
- species differences
- vegetation
- feeds
- digestibility
- sheep
- goats
- cattle
- seasonal variation
- Argentina
- botanical composition
- forage
- diet botanical composition
- conceptualization
- forage classes
- microhistological analysis
- multivariate analysis
- similarity of diets
- Library Collection RecordStructural anti-quality characteristics are physical plant traits that reduce the performance and productivity of herbivores and quality of their agricultural products. Most structural anti-quality…Publication Date 2001-07-01
- shear strength
- animal injuries
- wool
- performance
- tensile strength
- foraging
- habitats
- plant morphology
- duration
- plant anatomy
- pastures
- digestibility
- sustainability
- botanical composition
- quality
- pasture plants
- literature reviews
- grazing
- feed intake
- bite size
- chewing
- canopy structure
- intake rate
- physical plant defenses
- spines
- Library Collection RecordNative pasture and Old World bluestems (Bothriochloa spp.) have contrasting herbage production characteristics that suggest potential for incorporation into a complementary forage system. We compared…Publication Date 2001-07-01
- growth periods
- costs and returns
- economic analysis
- liveweight gain
- stocking rate
- pastures
- profitability
- Oklahoma
- biomass production
- botanical composition
- grazing
- beef cattle
- forage
- mixed prairie
- complementary forages
- old world bluestem
- Bothriochloa
- livestock performance
- Library Collection RecordPrevious authors have described nesting habitat of the northern bobwhite (Colinus virginianus) throughout its range, but few have compared structural or compositional differences of vegetation…Publication Date 2001-05-01
- nests
- weather
- visibility
- habitat selection
- Colinus virginianus
- ground cover
- habitats
- predators
- reproductive performance
- vegetation
- woody plants
- Oklahoma
- botanical composition
- grasses
- bobwhite
- Colinus virginianus
- gallinaceous
- habitats
- northern
- quail
- upland game
- Library Collection RecordThe cover of native and non-native introduced plants was compared between seeded (reclaimed) ski runs and adjacent or nearby unseeded (control) areas at a managed ski area in northern Arizona to…Publication Date 2001-05-01
- sowing
- disturbed soils
- skiing
- topsoil
- soil degradation
- ground cover
- grasslands
- reclamation
- species diversity
- introduced species
- botanical composition
- Arizona
- disturbance
- reclamation
- ski runs
- non-native species
- richness
- Library Collection RecordRedberry juniper (Juniperus pinchotii Sudw.) is a noxious shrub or small tree that invades rangelands in northwest Texas. Field reflectance measurements showed that redberry juniper had lower visible…Publication Date 2001-05-01
- infrared radiation
- detection
- color
- aerial photography
- Weeds
- reflectance
- Juniperus pinchotii
- Infestation
- remote sensing
- shrubs
- plant density
- Texas
- botanical composition
- color-infrared photography
- reflectance
- digital image anaysis
- accuracy assessment
- Juniperus
- Library Collection RecordIn recent times, pinyon (Pinus spp.)-juniper (Juniperus spp.) woodlands have expanded into large portions of the Southwest historically occupied by grassland vegetation. From 1997-1998, we studied…Publication Date 2001-05-01
- wild birds
- pinyon-juniper
- frequency
- grasslands
- species diversity
- ecological succession
- woodlands
- establishment
- botanical composition
- Pinus
- Juniperus
- Arizona
- Juniperus monosperma
- grasslands
- pinyon-juniper
- Arizona
- southwestern U.S.
- avian communities
- succession
- Library Collection RecordThe population of European mouflon (Ovis musimon Pallas) established on an island of the sub-Antarctic Kerguelen archipelago is characterized by a demographic cycle. Every 2-5 years, there is a…Publication Date 2001-05-01
- histology
- population dynamics
- rumen contents
- populations
- identification
- temporal variation
- plants
- mouflon
- demography
- validity
- Kerguelen Archipelago
- composition
- winter kill
- estimation
- mortality
- feces
- diet
- botanical composition
- feeding preferences
- diet analysis
- rumen
- feces
- Ovis musimon
- Library Collection RecordTraditional theories of plant succession leading to a single equilibrium community are being re-evaluated. Alternative theories involving multiple steady states, and state-and-transition processes…Publication Date 2001-05-01
- groundwater
- ecosystems
- soil depth
- arid zones
- ground cover
- water table
- plant ecology
- ecological succession
- riparian buffers
- soil water content
- plant communities
- semiarid zones
- plant litter
- botanical composition
- rangelands
- riparian plant communities
- groundwater
- soil moisture
- state-and-transition models