Rangeland Ecology & Management
Get reliable science
Toggle Search
Result Type
Collection
Keywords
Document Type
Displaying 3451 - 3500 of 3603 results
- Library Collection RecordThe argument that the threat posed by introduced species is overblown is often buttressed by the observation that native species sometimes also become invasive. An examination of the literature on…Publication Date 2012
- disturbance
- fire suppression
- introduced species
- invasion
- native invader
- nonnative
- succession
- USA
- Library Collection RecordSpecies interactions affect plant diversity through the net effects of competition and facilitation, with the latter more prevalent in physically stressful environments when plant cover ameliorates…Publication Date 2012
- community assembly
- competition
- diversity
- dominance
- facilitation
- invasion
- prairies
- stress gradient hypothesis
- Library Collection RecordIn the face of unprecedented loss of biodiversity, cross-taxon correlates have been proposed as a means of obtaining quantitative estimates of biodiversity for identifying habitats of important…Publication Date 2012
- Library Collection RecordUncertainty about the effects of warming and grazing on soil nitrogen (N) availability, species composition, and aboveground net primary production (ANPP) limits our ability to predict how global…Publication Date 2012
- alpine meadow
- global warming
- herbivore
- N addition
- Plant functional group
- primary production
- species diversity
- Tibetan Plateau
- Tibet
- China
- Library Collection RecordRecent biodiversity-ecosystem functioning experiments in temperate grasslands have shown that productivity positively correlates with plant species richness. Resource partitioning (in particular,…Publication Date 2012
- 15N
- biodiversity–ecosystem functioning
- niche
- nitrogen
- proportional
- similarity
- resource partitioning
- rooting depth
- species richness
- temperate grassland
- Zurich
- Switzerland
- Library Collection RecordPulses of metabolic activity are a common ecological response to intermittently available resources, and in soils these pulses often occur in response to wetting. To better understand variation in…Publication Date 2012
- Carbon cycle
- elevation gradient
- precipitation
- respiration
- California
- USA
- Library Collection RecordTheory and observation indicate that changes in the rate of primary production can alter the balance between the bottom-up influences of plants and resources and the top-down regulation of herbivores…Publication Date 2012
- Arctic LTER
- Toolik Lake
- Alaska
- USA
- arctic tundra ecosystem
- biomass
- Caribou
- EEH
- exploitation ecosystem hypothesis
- food web
- herbivory
- nematode
- nutrients
- predators
- productivity
- vole
- Toolik Lake
- Alaska
- USA
- Library Collection RecordThe Mantel correlogram is an elegant way to compute a correlogram for multivariate data. However, recent papers raised concerns about the power of the Mantel test itself. Hence the question: Is the…Publication Date 2012
- autocorrelation
- correlogram
- Geary
- Mantel
- Moran
- multiscale ordination
- multivariate variogram
- simulation study
- spatial correlation
- ecosystem ecology
- Library Collection RecordSynchronous and intermittent reproduction in long-lived plants, known as mast seeding, is induced by climatic cues, but the mechanism explaining variation in masting among neighboring but edaphically…Publication Date 2012
- alpine grasslands
- Bayesian
- Chionochloa spp.
- Environmental change
- mast flowering
- Murchison Mountains
- snow tussock grass
- soil fertility
- New Zealand
- Library Collection RecordUnderpinning the International Union for Conservation of Nature (IUCN) Red List is the assessment of extinction risk as determined by the size and degree of loss of populations. The IUCN system lists…Publication Date 2012
- area of occupancy
- extent of occurrence
- extinction
- IUCN
- Red List
- species distribution
- threatened categories
- Library Collection RecordLocal species diversity is maintained over ecological time by a balance between dispersal and species interactions. Local-egional species richness relationships are often used to investigate the…Publication Date 2012
- habitat fragmentation
- landscape corridor
- regional enrichment
- species diversity
- South Carolina
- USA
- Library Collection RecordThere have been intense debates about the decomposition of regional diversity (gamma) into its within-community component (alpha) and between-community component (beta). Although a recent Ecology …Publication Date 2012
- additive partitioning
- Â alpha diversity
- Â beta diversity
- Â differentiation
- Â gamma diversity
- Â Hill numbers
- Â multiplicative partitioning
- Â similarit
- Library Collection RecordThe need to model and test hypotheses about complex ecological systems has led to a steady increase in use of path analytical techniques, which allow the modeling of multiple multivariate…Publication Date 2012
- BUGS
- causal models
- d-separation
- indirect effects
- mechanistic models
- mediation
- SEM
- structural equation models
- trait-mediated indirect effects
- Library Collection RecordEarlier spring phenology observed in many plant species in recent decades provides compelling evidence that species are already responding to the rising global temperatures associated with…Publication Date 2012
- climate change
- conservation
- meta-analysis
- phenology
- synthesis
- temperature sensitivity
- tracking climate
- warming experiment
- Library Collection RecordBioclimatic envelope models use associations between aspects of climate and species' occurrences to estimate the conditions that are suitable to maintain viable populations. Once bioclimatic…Publication Date 2012
- biodiversity
- biogeography
- climate change
- climate envelopes
- conservation planning
- ecological niches
- Invasions
- niche conservation
- restoration ecology
- species distributions
- translocation experiments
- uncertainty in prediction
- modelling
- decision support systems
- Library Collection RecordThe existence of deterministic assembly rules for plant communities remains an important and unresolved topic in ecology. Most studies examining community assembly have sampled aboveground species…Publication Date 2012
- belowground community assembly
- guild proportionality
- pairwise species interactions
- pyrosequencing
- root identification
- species coexistence.
- Estonia
- Library Collection RecordRestorations commonly utilize seed addition to formerly arable lands where the development of native plant communities is severely dispersal limited. However, variation in seed addition practices may…Publication Date 2012
- climate change
- diversity
- drought
- invasive
- prairie
- priority effects
- Rainfall manipulation
- recovery
- resilience
- resistance
- restoration
- stability
- Nebraska
- USA
- Library Collection RecordThis historical data set consists of 178 permanent 1-m2 quadrats located on semi-desert grasslands at the Santa Rita Experimental Range, Arizona, USA. Individual plants in these quadrats were…Publication Date 2012
- climate
- Geographic Information Systems (GIS)
- livestock grazing
- plant community
- plant demography
- Sonoran Desert
- species interactions
- Santa Rita Experimental Range
- Arizona
- USA
- Library Collection RecordHealthy ecosystems include many species (high richness) with similar abundances (high evenness). Thus, both aspects of biodiversity are worthy of conservation. Simultaneously conserving richness and…Publication Date 2012
- abundance
- agriculture
- biodiversity
- conservation
- ecosystem management
- evenness
- fire
- metadata
- organic farming
- species richness
- Library Collection Recordhe fourth-corner problem entails estimation and statistical testing of the relationship between species traits and environmental variables from the analysis of three data tables. In a 2008 paper, S.…Publication Date 2012
- ecological community
- fourth-corner statistic
- functional ecology
- permutational model
- RLQ analysis
- sequential test
- species traits
- ecology
- statistical analysis
- ecosystem analysis
- Library Collection RecordHuman-induced increases in nitrogen (N) deposition are common across many terrestrial ecosystems worldwide. Greater N availability not only reduces biological diversity, but also affects the…Publication Date 2012
- biodiversity
- C3 grasses
- C4 grasses
- ecosystem functioning
- ecosystem services
- fire
- nitrogen deposition
- root mass
- soil carbon sequestration
- Cedar Creek Ecosystem Science Reserve
- Minnesota
- USA
- Library Collection RecordUnderstanding how plant communities are organized requires uncovering the mechanism(s) regulating plant species coexistence and relative abundance. Negative soil feedbacks may affect plant…Publication Date 2012
- Coexistence
- community composition
- dominance
- mixed-grass prairie
- rarity
- relative abundance
- soil feedback
- Great Plains
- USA
- Canada
- Library Collection RecordThe encroachment of woody plants into grasslands, and the conversion of savannas and open woodlands into shrublands, has been widely reported during the past decade. Encroachment has generated…Publication Date 2012
- degradation
- desertification
- ecosystem processes
- encroachment
- invasion
- shrub
- shrubland
- Thickening
- Woody
- Library Collection RecordAnnual estimates and seasonal patterns of gross nitrogen turnover in terrestrial soils are poorly understood due to the lack of experimental evidence. Based on year round sampling in wintergrazed and…Publication Date 2012
- annual nitrogen budget
- drying-rewetting
- freeze-thaw
- microbial biomass
- nitrification
- N mineralization
- steppe
- ecosystem ecology
- soils
- grazing
- plant production
- Mongolia
- China
- Library Collection RecordWith the advent of systematic high-resolution satellite photography, striking geometric shapes of banded vegetation several km2 in size, but not apparent from the ground, have been documented for…Publication Date 2012
- carbon isotopes
- climate change
- desert geomorphology
- emergence
- Little Ice Age
- Medieval Warm Period
- Object-based image analysis
- positive feedback mechanisms
- soil radiocarbon dating
- Chihuahuan Desert
- New Mexico
- USA
- Library Collection RecordIncreasing nitrogen (N) deposition and changing precipitation patterns in Neotropical savannas could alter plant growth, reproduction, and nutrients by altering soil nutrient and water availability.…Publication Date 2012
- bunchgrass
- cerrado
- Loudetiopsis chrysothrix
- nitrogen enrichment
- phosphorus
- precipitation change
- savanna
- soil fertility
- Tristachya leiostachya
- Brazil
- Library Collection RecordFuture disruptions to fire activity will threaten ecosystems and human well-being throughout the world, yet there are few fire projections at global scales and almost none from a broad range of…Publication Date 2012
- climatic constraints
- ensemble model uncertainty
- flammability
- global climate models (GCM)
- GCM agreement
- global fire probabilities
- resources to burn
- spatial statistical models
- species distribution models
- Library Collection RecordIn ecosystems throughout the world climate models project increased variability in precipitation patterns that may strongly affect the above- and below-ground processes that control carbon, water,…Publication Date 2012
- Avena barbata
- Bayesian ANOVA
- carbon
- climate change
- dry periods
- grassland
- nitrogen
- phenology
- precipitation
- Soil Type
- water
- California
- USA
- Library Collection RecordAs society seeks to meet the needs of a growing human population and rising aspirations for consumption, many of the ecosystem services on which society depends have declined in the global aggregate…Publication Date 2012
- resource management
- sense of place
- social-ecological
- sustainability
- transformation
- New Zealand
- Library Collection RecordRangelands are significant providers of ecosystem services in agroecosystems world-wide. Yet few studies have investigated how different intensities of livestock grazing impact one important provider…Publication Date 2012
- bumble bees
- floral resources
- grazing intensity
- livestock grazing
- native bees
- nesting resources
- Pacific Northwest Bunchgrass Prairie
- pollinators
- Soil Characteristics
- sweat bees
- Vegetation Characteristics
- Pacific Northwest
- USA
- Library Collection RecordChanges in the composition of plant functional type (PFT) activities are expected to accompany a changing climate. In tropical montane grasslands, such changes are predicted to follow shifts in the…Publication Date 2012
- grassland
- natural resource management
- montane
- remote sensing
- Library Collection RecordWits University Press, PO Wits, 2050, South Africa 240 pages, softcover ISBN-10: 1868145301, ISBN-13: 978-1868145300. Price R250 (softcover)Publication Date 2012
- book review
- Library Collection RecordAn important consideration in designing and managing forage systems is the knowledge of the physiological response mechanisms to cutting, especially when water deficit conditions are prevailing. The…Publication Date 2012
- cut
- drought
- stomatal conductance
- transpiration
- water potential
- Macedonia
- Greece
- Library Collection RecordSignificant grassland degradation in Inner Mongolia is generally attributed by Chinese officials and scholars to overgrazing, whereas the effects of opening up grassland for farming, or what might be…Publication Date 2012
- Mongolia
- China
- Library Collection RecordThe Chinese government has introduced a grassland Household-Contracted Responsibility System (HCRS) to contract out pasture use rights to households. This aims to strengthen exclusive use and to…Publication Date 2012
- Hongyuan County
- Sichuan Province
- China
- Library Collection RecordCynodon dactylon is widely distributed in Iran in diverse habitats. In this study, morphological variation of 46 populations of this species was evaluated based on 52 qualitative and quantitative…Publication Date 2012
- Cynodon dactylon
- taxonomy
- grasses
- plant anatomy
- leaf epidermis
- Library Collection RecordRemote sensing is generally accepted as a powerful technique for land surface studies in arid and semi-arid regions. This technique is also very useful for other environmental studies such as shallow…Publication Date 2012
- vegetation cover
- soil properties
- remote sensing
- Landsat
- Iran
- Library Collection RecordPayments for environmental services (PES) are increasingly promoted as an economic mechanism that could potentially address socio-economic and environmental conservation objectives in developing…Publication Date 2012
- Indigenous ecological knowledge
- capacity building
- market-based instruments
- citizen science
- payment for environmental services
- Australia
- Library Collection RecordDirect and indirect socio-demographic attributes of the resource-poor farmers were determined in the study as potential controls of reactive and/or autonomous response to climate change. One thousand…Publication Date 2012
- climate change
- socio-economic factors
- subsistence agriculture
- Library Collection RecordIn 2010, we launched the Global Index of Vegetation-Plot Databases (GIVD; http://www.givd.info), an internet-based re-source offering metadata of existing electronic vegetation databases. On 11 May…Publication Date 2012
- biodiversity
- data sharing
- ecoinformatics
- metadata
- Phytosociology
- relevé
- Library Collection RecordThe establishment of conservancies and collaborative nature reserves is often promoted without understanding the impact that such initiatives have on the environment, the wildlife and landowners.…Publication Date 2012
- nature reserve
- management
- game
- livestock
- agriculture
- land use
- conservation
- grazing
- Library Collection RecordThe monitoring of soil moisture (SM) can be performed through remote sensing technologies. Among the operational microwave radiometers potentially able to provide information about SM and its…Publication Date 2012
- soil moisture
- AMSU
- remote sensing
- microwave
- Library Collection RecordA method for retrieving both agricultural biomass and soil moisture starting from simultaneous observations at L and X band is described in this paper. The research was carried out within the…Publication Date 2012
- L and X-band SAR data
- SIASGE project
- vegetation biomass
- soil moisture
- Artificial neural networks
- Library Collection RecordRangeland degradation is a serious hindrance to sustainable development in degraded areas. Mapping and monitoring vegetation species is an increasingly important issue across various fields of…Publication Date 2012
- remote sensing
- rangeland degradation
- increaser and decreaser species
- indicator
- vegetation indices
- Library Collection RecordAcridoidea is a superfamily within the Orthoptera order that comprises a group of short-horned insects commonly called grasshoppers. Grasshopper and locust species are major pests of grasslands and…Publication Date 2012
- Acridoidea
- grasshoppers
- locusts
- acridoid control
- sustainable management
- Library Collection RecordSpecies richness and diversity indices (Shannon-Wiener index, Simpson dominance index and Pielou evenness index) in alpine grassland ecosystems (alpine meadow, alpine steppe and desert steppe) under…Publication Date 2012
- species diversity
- species richness
- grazing exclusion
- Growing Season Precipitation
- alpine grasslands
- Northern Tibetan Plateau
- Tibet
- China
- Library Collection RecordMeasurements of resource capture by individuals, species, or functional groups coexisting in field stands improve our ability to investigate the ecophysiological basis of plant competition. But…Publication Date 2012
- Library Collection RecordWarmer temperatures can alter the phenology and distribution of individual species. However, differences across species may blur community-level phenological responses to climate or cause biotic…Publication Date 2012
- altitudinal gradient
- beta diversity
- biodiversity
- biotic homogenization
- biotic invasion
- climate change
- community structure
- Hope River Valley
- interactive drivers
- Lepidoptera
- nitrogen
- phenology
- Alien invasive species
- North Canterbury
- New Zealand
- Library Collection RecordEmission of Green House Gases (GHGs) from various sources into the atmosphere causes rise in air temperature. This addition of GHGs has a great impact on the environment. Among the GHGs, carbon…Publication Date 2012
- Mitigating
- climate change
- GHGs
- atmosphere
- temperature
- soil
- management
- agriculture
- carbon dioxide
- greenhouse gases
- Library Collection RecordThe study was conducted to explore the influence of over-grazing and ungrazing on nematode biodiversity in a semi-arid region pasture, in Adiyaman, Turkey, in 2008. Soil samples were taken in mid…Publication Date 2012
Pagination
- First page
- Previous page
- …
- 68
- 69
- 70
- 71
- 72
- …
- Next page
- Last page