Anak Krakatau. A colonization model with in a colonization model?
Dynamique des populations ; Ecologie ; Eruption volcanique ; Faune ; Ile ; Indonésie ; Volcanisme ; Végétation
Ecology ; Fauna ; Indonesia ; Island ; Population dynamics ; Vegetation ; Volcanic eruption ; Volcanism
This paper re-examines previous suggestions concerning the colonization of the Krakatau islands since the extirpating 1883 eruption that involve the more recently emergent volcanic island Anak Krakatau, which itself suffered a devastating eruption
Biogéographie ; Colonisation végétale ; Cours d'eau ; Crue ; Dynamique de la végétation ; Etats-Unis ; Fluviatile ; Humidité du sol ; Iowa ; Végétation
segregated along gradients of elevation and soil composition. They study establishment at a specific time and place in order to capture the relation between a particular flood stage and a vegetation pattern. They reason that if site-specific features cannot
Plant colonization on an abandoned, elevated highway in New York City
Biogéographie ; Dynamique de la végétation ; Etats-Unis ; Géographie physique ; New York City ; Phytogéographie
Plants colonized soil-filled gutters and medians after closure of a 3-km highway section in Manhattan in 1973. A 1981 survey found that native species dominated the community of 477 woody plants. - (D. W. Gade).
This work investigates the initial colonization on recent lahar deposits of the northeast slope of Popocatepetl volcano, where 29 circular sample plots were established to determine the development stages of colonization in 4 types of habitats
Effects of wet meadow riparian vegetation on streambank erosion. 2. Measurements of vegetated bank strength and consequences for failure mechanics
California ; Cours d'eau ; Erosion des berges ; Etats-Unis ; Géométrie hydraulique ; Méandre ; Prairie ; Sierra Nevada ; Végétation ripicole
Bank erosion ; California ; Channel geometry ; Meadow ; Meander ; Riparian vegetation ; Sierra Nevada ; Stream ; United States of America
The AA. measured the effect of wet meadow vegetation on the bank strength and failure mechanics of a meandering montane meadow stream, the South Fork of the Kern River at Monache Meadow, in California's Sierra Nevada. Streambanks colonized by wet
graminoid meadows vegetation were on average 5 times stronger than those colonized by dry xeric meadow and scrub vegetation. The measurements show that strength is correlated with vegetation density indicators, including stem counts.
A method for estimating vegetation change over time and space
Biodiversity ; Ecosystem ; Global change ; Human impact ; Land use ; Model ; Plant colonization ; Vegetation ; Vegetation dynamics
Action anthropique ; Biodiversité ; Changement global ; Colonisation végétale ; Dynamique de la végétation ; Ecosystème ; Modèle ; Utilisation du sol ; Végétation
The AA. propose a 3-dimensional model derived from the logistic equation for estimating vegetation change, using native and non-native plant diversity. The 2 variables, based on the current and the theoretical maximum diversity of native plants
on a given scale, and the result of the model are relative values without units, and are therefore scale-independent. Hence, this method developed can be used directly for cross-scale evaluations of vegetation data, and indirectly for estimating ecosystem
Agua ; Campo semiárido ; Campo árido ; Colonización vegetal ; Erosión de los suelos ; España ; Inclinación de la vertiente ; Propiedades del suelo ; Topografía
in the landscape, they analysed variations in colonization success (vegetation cover and species number) with slope angle on 156 slopes, as a function of slope aspect. The results are discussed in the perspective of a more efficient ecological restoration
In this paper, the AA. study the mechanisms that control plant colonization on semi-arid eroded slopes in the basin of the Alfambra River (Teruel, east Spain) by (i) determining topographic thresholds for plant colonization, (ii) identifying
the soil properties limiting plant establishment and (iii) assessing whether colonizing species have specific plant traits to cope with these limitations. Since soil erosion and water availability can limit plant establishment and both can interact
Colonización vegetal ; Dinámica de la vegetación ; Duna litoral ; Ecosistema ; Litoral ; México ; Vegetación
and landform evolution. Topographic surveys using tape and clinometer were conducted in conjunction with vegetation survey transects at 4 locations across the Doña Juana dunefield. A dual interaction was found such that colonizing species both create and affect
This paper examines 4 separate landform types in a complex coastal transgressive dunefield located in the central Gulf of Mexico, in order to assess the relationships between dunefield habitat, local environmental factors, vegetation associations
topography, and in turn, topography determines vegetation association and succession patterns. In coastal dunes, the vegetation and abiotic environment interact tightly and generate a complex and highly dynamic biogeomorphic system where substrate mobility
and colonization processes reinforce one another in positive feedback.
Soil seed bank composition and distribution on eroded slopes in the hill-gully Loess Plateau region (China): influence on natural vegetationcolonization
Interactions between river flows and colonizingvegetation on a braided river: exploring spatial and temporal dynamics in riparian vegetation cover using satellite data
ASTER ; Années 2004-2009 ; Chenal anastomosé ; Cours d'eau ; Crue ; Dynamique de la végétation ; Friuli-Venezia Giulia ; Image satellite ; Indice de végétation ; Italie ; LiDAR ; Régime hydrique ; Tagliamento ; Traitement des données ; Télédétection
River, Italy. The study period (2004-2009) of increasing flow disturbance allows the exploration of vegetation dynamics within the river's active corridor under changing flow conditions. The analysis demonstrates the utility of ASTER data
for investigating vegetation dynamics along large fluvial corridors and reveals both spatial and temporal variations in the expansion, coalescence, and erosion of vegetated patches within the study reach. It is illustrated that the rate of growth of riparian trees
The study area is located in Vallcebre, in the Upper Llobregat basin, which represents a sub-Mediterranean edge of the Pyrenees. Vegetation is sparse and heterogeneous. The aim of this study was to obtain a detailed demography of the seed
and seedling phases in the badland areas of the Upper Llobregat basin. The AA. sought to test the hypothesis that seed availability and seedling recruitment was not enough to guarantee colonization of these areas.
Biogeography ; Hong Kong ; Plant colonization ; Stone wall ; Tree ; Tropical zone ; Urban ecology ; Urban environment ; Vegetation
Arbre ; Biogéographie ; Colonisation végétale ; Ecologie urbaine ; Environnement urbain ; Hong Kong ; Mur de pierres ; Végétation ; Zone intertropicale
Stone retaining walls in urban Hong Kong provided vertical habitats for spontaneous colonization by a diversified humid-tropical flora with large trees. A citywide survey assessed wall and tree characteristics to understand wall-tree relationships
and identify conservation candidates. Nonparametric correlations were computed between 28 wall attributes versus tree count, tree biomass, and species-vegetation factors. Most of the 245 walls, with 1275 trees, were in residential areas. Wall height was a key
determinant. Stone width offered more horizontal microsites for seeds to lodge. The walls-cum-vegetation, many older than 100 years, presented a precious natural-cum-cultural heritage, deserving protection as an urban ecological asset.
Végétation spontanée et protection de la nature en ville
Germany ; Nature conservation ; Niedersachsen ; Plant colonization ; Plant species ; Town ; Vegetation ; Vegetation dynamics
Allemagne ; Colonisation végétale ; Dynamique de la végétation ; Espèce végétale ; Niedersachsen ; Osnabrck ; Protection de la nature ; Ville ; Végétation
exemples montrent la dynamique spatiale surprenante de la végétation urbaine. Pour la végétation urbaine, des mesures de protection sont inutiles et même dangereuses: bien souvent elles détruisent ce qu'elles sont censées protéger. La meilleure stratégie
Biogeography ; California ; Habitat;Settlement ; United States ; Vegetation ; Zoogeography
At least eight species of parrots, most of them native to South America, have naturalized in southern California suburbs where they feed mainly on fruits and seeds from introduced ornemental plants. Their colonization potential is still unclear
Biodiversity ; Central Europe ; Ecology ; Germany ; Phytogeography ; Plant colonization ; Plant species ; Transport network ; Vegetation ; Vegetation dynamics
Allemagne ; Biodiversité ; Colonisation végétale ; Dynamique de la végétation ; Ecologie ; Espèce végétale ; Europe centrale ; Phytogéographie ; Réseau de transports ; Végétation
Bank erosion ; Deforestation ; Erosion rate ; Forest ; Forestry ; Plant colonization ; Riparian vegetation ; Stream ; United Kingdom ; Wales ; Watershed
Bassin-versant ; Colonisation végétale ; Cours d'eau ; Déboisement ; Erosion des berges ; Foresterie ; Forêt ; Royaume-Uni ; Vitesse d'érosion ; Végétation ripicole ; Wales
to levels that were lower than before the harvesting operations began. That is attributed to increased light levels, following canopy removal, allowing vegetation to colonize exposed banks.
Vegetation patterns and species-environment relationships in the Gurbantunggut Desert of China
Arid area ; Biodiversity ; China ; Desert ; Dune ; Plant colonization ; Soil ; Soil properties ; Spatial distribution ; Vegetation ; Xinjiang
Biodiversité ; Chine ; Colonisation végétale ; Distribution spatiale ; Domaine aride ; Dune ; Désert ; Propriétés du sol ; Sol ; Végétation ; Xinjiang
This paper, with CCA and other quantitaive methods, compares the characteristics of vegetation distribution in the longitudinal and transverse directions across the landscape in the Gurbantunggut Desert, and discusses the response to spatially
varying gradients of environmental factors, such as landform morphology and soil physical and chemical properties. Thus, this paper aims to provide ecological understanding of the relationship between the vegetation patterns and environmental factors
on a quantitative level, to aid vegetation rehabilitation and ecological re-building.
-tundra boundary. In particular, the AA. address 2 questions : what is the relationship between active-layer thickness, soil drainage, and vegetation? what are the temporal dynamics of tree colonization and mortality in this thaw-pond complex?
This study examines the relationship between vegetation and soil characteristics in an active thaw pond complex on Seward Peninsula in order to determine the mechanistic relationship between thermokarst formation and vegetation change at the forest