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Résultats de la recherche (15 résultats)

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  • A geomorphological based banded (tiger) vegetation pattern related to former dune fields in Sokoto (Northern Nigeria)
  • The significance of soil, water and landscape processes in banded vegetation patterning
  • Brousse tigrée ; Domaine semi-aride ; Dune ; Eau du sol ; Ecosystème ; Ecoulement ; Nigéria ; Photo-interprétation ; Vent ; Végétation ; Zonage
  • Dune ; Ecosystem ; Nigeria ; Photointerpretation ; Runoff ; Semi-arid area ; Soil water ; Vegetation ; Wind ; Zoning
  • The described banded vegetation pattern was observed on aerial photographs of the Northern part of Sokoto province in Northern Nigeria. The orientation of the bands (about NNW-SSE) is perpendicular to the prevailing wind direction (ENE-WSW) during
  • the period of formation of the former dunes. The genesis of this pattern of regional scale appears to be quite different from local scale banded patterns known in dry zones in Africa and Asia and described as Brousse tigrée, being moving vegetation arcs
  • Vegetation arcs and litter dams : similarities and differences
  • The significance of soil, water and landscape processes in banded vegetation patterning
  • Australie ; Concept ; Couverture végétale ; Domaine aride ; Domaine semi-aride ; Ecosystème ; New South Wales ; Pente de versant ; Propriétés du sol ; Ruissellement ; Végétation ; Zonage
  • Arid area ; Australia ; Concept ; Ecosystem ; New South Wales ; Plant cover ; Rill wash ; Semi-arid area ; Slope gradient ; Soil properties ; Vegetation ; Zoning
  • Vegetation arcs are near parallel bands of denser vegetation aligned perpendicular to slope and separated by barer inter-arc zones. These patterns occur in arid and semi-arid areas of gentle gradient. Similar, but much smaller scale patterns, here
  • The evolution and significance of soil-vegetation patterns following land abandonment and fire in Spain
  • The significance of soil, water and landscape processes in banded vegetation patterning
  • Almería ; Domaine méditerranéen ; Dégradation des sols ; Ecosystème ; Erosion des sols ; Espagne ; Gerona ; Infiltration ; Ruissellement ; Simulation de pluie ; Sol ; Végétation
  • Almería ; Ecosystem ; Gerona ; Infiltration ; Mediterranean area ; Rainfall simulation ; Rill wash ; Soil ; Soil degradation ; Soil erosion ; Spain ; Vegetation
  • Examples are presented from 2 locations in SE and NE Spain where patterned or banded vegetation are found on semi-natural and abandoned land or where vegetation is recovering from wildfire. In both cases patterns are being investigated as process
  • Soil and water components of banded vegetation patterns
  • The significance of soil, water and landscape processes in banded vegetation patterning
  • Afrique ; Analyse spatiale ; Brousse tigrée ; Couverture végétale ; Domaine aride ; Domaine semi-aride ; Eau du sol ; Ecosystème ; Encroûtement ; Erosion des sols ; Monde ; Niger ; Paysage ; Propriétés du sol ; Végétation ; Zonage
  • Africa ; Arid area ; Duricrust ; Ecosystem ; Landscape ; Niger ; Plant cover ; Semi-arid area ; Soil erosion ; Soil properties ; Soil water ; Spatial analysis ; Vegetation ; World ; Zoning
  • Banded landscapes are comprised of alternating bands of vegetation and bare ground aligned along the contours in arid and semi-arid regions, on very gentle and uniform slopes. The objective of this paper is to review some of the major findings
  • pertaining to soil and water components of banded vegetation patterns.
  • Laboratory experiments on sequential scour/deposition and their application to the development of banded vegetation
  • The significance of soil, water and landscape processes in banded vegetation patterning
  • Colonisation végétale ; Domaine aride ; Erosion des sols ; Erosion hydrique ; Expérimentation ; Humidité du sol ; Kenya ; Rift Valley ; Simulation de pluie ; Splash ; Surpâturage ; Versant ; Végétation
  • Arid area ; Experimentation ; Kenya ; Over-grazing ; Plant colonization ; Rainfall simulation ; Rift Valley ; Slope ; Soil erosion ; Soil moisture ; Splash ; Vegetation ; Water erosion
  • variations in moisture storage capacity. Experimental results indicate that vegetation bands at the scale observed at Baringo (Rift Valley, Kenya) are consistent with development by sequential scour and deposition, caused by some combination of sheetwash
  • The significance of soil, water and landscape processes in banded vegetation patterning
  • Australie ; Distribution spatiale ; Domaine aride ; Géochimie ; Infiltration ; New South Wales ; Propriétés du sol ; Sel ; Sol ; Végétation ; Zonage
  • Arid area ; Australia ; Geochemistry ; Infiltration ; New South Wales ; Salt ; Soil ; Soil properties ; Spatial distribution ; Vegetation ; Zoning
  • The aim of this paper is to investigate spatial variation of soil chemical properties at an intermediate scale. It is proposed that there is an association between the different vegetation and soil surface (soil and biotic crusts) units
  • and the underlying soil chemical properties; that bare areas have a relatively larger soluble salt concentration compared to the vegetated areas. A model that explains this distribution, and incorporates vegetation, microtopographic and infiltration differences
  • The significance of soil, water and landscape processes in banded vegetation patterning
  • Afrique ; Brousse tigrée ; Burkina ; Catena ; Dynamique de la végétation ; Ecosystème ; Mali ; Niche écologique ; Pente de versant ; Sahel ; Topographie ; Vent ; Végétation ; Zonage
  • Africa ; Burkina ; Catena ; Ecological niche ; Ecosystem ; Mali ; Sahel ; Slope gradient ; Topography ; Vegetation ; Vegetation dynamics ; Wind ; Zoning
  • Etude des formations de brousse tigrée du Gourma, au Mali et dans le nord du Burkina. Estimation de l'impact respectif du vent et de la topographie sur leur répartition. Mise en évidence d'une migration vers le haut de ces bandes de végétation.
  • The soil surface characteristics of vegetation stripes in Northern Mexico and their influences on the system hydrodynamics. An experimental approach
  • The significance of soil, water and landscape processes in banded vegetation patterning
  • Chihuahua ; Couverture végétale ; Domaine aride ; Désert ; Eau du sol ; Encroûtement ; Erosion des sols ; Infiltration ; Mexique ; Ruissellement ; Simulation de pluie ; Sol ; Végétation ; Zonage
  • Arid area ; Chihuahua ; Desert ; Duricrust ; Infiltration ; Mexico ; Plant cover ; Rainfall simulation ; Rill wash ; Soil ; Soil erosion ; Soil water ; Vegetation ; Zoning
  • To characterise the spatial variability of the soil surface features and their role in the hydrodynamics of the vegetation stripes, the AA. first described them along a transect perpendicular to the main axis of a stripe together with the detailed
  • Banded vegetation near Broken Hill, Australia : significance of surface roughness and soil physical properties
  • The significance of soil, water and landscape processes in banded vegetation patterning
  • Australie ; Couvert végétal ; Domaine aride ; Ecosystème ; Ecoulement ; Formation herbacée ; New South Wales ; Propriétés du sol ; Rugosité ; Végétation ; Zonage
  • Arid area ; Australia ; Ecosystem ; Grassland ; New South Wales ; Plant canopy ; Roughness ; Runoff ; Soil properties ; Vegetation ; Zoning
  • Testing the validity of upslope migration in banded vegetation from south-west Niger
  • The significance of soil, water and landscape processes in banded vegetation patterning
  • Analyse isotopique ; Analyse spatiale ; Brousse tigrée ; Domaine semi-aride ; Eau du sol ; Encroûtement ; Erosion des sols ; Granulométrie ; Niger ; Propriétés du sol ; Ruissellement ; Végétation ; Zonage
  • Duricrust ; Grain size distribution ; Isotope analysis ; Niger ; Rill wash ; Semi-arid area ; Soil erosion ; Soil properties ; Soil water ; Spatial analysis ; Vegetation ; Zoning
  • The significance of soil, water and landscape processes in banded vegetation patterning
  • Bilan hydrologique ; Brousse tigrée ; Domaine semi-aride ; Eau du sol ; Ecosystème ; Encroûtement ; Erosion des sols ; Niger ; Ruissellement ; Végétation ; Zonage
  • Duricrust ; Ecosystem ; Niger ; Rill wash ; Semi-arid area ; Soil erosion ; Soil water ; Vegetation ; Water balance ; Zoning
  • The significance of soil, water and landscape processes in banded vegetation patterning
  • Action biogène ; Brousse tigrée ; Domaine aride ; Ecosystème ; Encroûtement ; Micromorphologie ; Niger ; Régime hydrique ; Sahel ; Sol ; Végétation
  • Arid area ; Biogenic process ; Duricrust ; Ecosystem ; Micromorphology ; Niger ; Sahel ; Soil ; Vegetation ; Water regime
  • The significance of soil, water and landscape processes in banded vegetation patterning
  • Australie ; Biodiversité ; Couverture végétale ; Domaine semi-aride ; Eau du sol ; Ecosystème ; Formation arbustive ; Modèle ; New South Wales ; Queensland ; Ruissellement ; Savane ; Simulation ; Végétation ; Zonage
  • Australia ; Biodiversity ; Ecosystem ; Model ; New South Wales ; Plant cover ; Queensland ; Rill wash ; Savanna ; Scrub ; Semi-arid area ; Simulation ; Soil water ; Vegetation ; Zoning
  • In many arid and semi-arid environments around the world, limited rainfall and runoff-runon processes have lead to vegetation patchiness on many types of landscapes. With simulations studies, the AA. address 2 related questions. Firstly, compared
  • The significance of soil, water and landscape processes in banded vegetation patterning
  • Albacete ; Climat ; Cycle de l'eau ; Domaine aride ; Domaine méditerranéen ; Eau du sol ; Erosion des sols ; Erosion hydrique ; Espagne ; Infiltration ; Murcia ; Précipitation ; Ruissellement ; Simulation de pluie ; Sol ; Valencia ; Végétation
  • Albacete ; Arid area ; Climate ; Infiltration ; Mediterranean area ; Murcia ; Precipitation ; Rainfall simulation ; Rill wash ; Soil ; Soil erosion ; Soil water ; Spain ; Valencia ; Vegetation ; Water cycle ; Water erosion ; Zoning
  • . Rainfall simulations experiments were carried out to determine runoff and infiltration characteristics of the bare and vegetated zones. The largest amount of redistribution during these events is found for areas having an intermediate rainfall regime
  • Water balance in a banded vegetation pattern. A case study of tiger bush in western Niger
  • The significance of soil, water and landscape processes in banded vegetation patterning
  • This paper aims to calculate water balance of an entire tiger bush unit, including bare and vegetated areas, to validate a rain redistribution hypothesis. They monitored measurements of runoff and soil moisture content in each zone composing a tiger