Sur le plateau Mossi, les sols sont épuisés par de nombreuses années de surexploitation, d'érosion et de ruissellement. Mais les terres mises en jachères retrouvent en 15 à 25 ans la végétation qu'elles portaient avant le défrichement. - (JPB)
Analysis of the potential vegetation in a 580 km2 fragment of the Nida Syncline. The basic mapping of the area was carried out in June 1983. The topographical basis was sheet 153.4 of Pinczów, at the scale of 1:50.000. The total length of the route
covered on foot in the course of mapping was about 420 km. This implied around 0.7 km of route per 1 km2. The reconnaissance of spatial differentiation of the potential natural vegetation was presented in the form of 1:100.000-scale map. - (DG)
The paper presents selected examples of the state and changes in actual vegetation in relation to the factors creating it. Also analysed is the spatial differentiation of the dominant forms and anthropogenic influences, as well character
Among 24 vegetational microlandscapes, some have a syntaxonomic composition and spatial structure of communities which had not change over many years. Others are undergoing steady change in the nature of their communities as a result
of anthropogenic impacts. The criteria were the occurence of spatial linkages between communities, differentiation of the shape of patches of communities, the affiliation of communities to the dynamics of vegetational rings, and the existence of vicarians pairs
Presented in this chapter is a historical review of research into the flora and vegetation of an area of the Malopolska Upland extending beyond the Nida Syncline. The review makes use of a series of original works and several review studies
. An attempt was made to pick out the main threads of the research done in the different periods, with particular attention being paid to work on xerothermic vegetation. - (DG)
Biological indicator ; Chemical pollution ; European part of Russia ; Pollution ; Saint Petersburg ; Spruce ; Tree ; Vegetation ; Vegetation degradation
Etude de la dégradation de la végétation sous l'effet de la pollution de l'usine chimique de Tosno dans l'oblast de Leningrad. Le tableau 1 rassemble des données sur l'état de peuplements d'épicés commun (Picea abies), le tableau 2 sur la fréquence
Derivation of vegetative variables from a LANDSAT TM image for modelling soil erosion
Ardèche ; Domaine méditerranéen ; Erosion des sols ; France ; LANDSAT ; Rhône-Alpes ; Thematic Mapper ; Traitement des données ; Télédétection ; Végétation
Ardèche ; Data processing ; France ; LANDSAT ; Mediterranean area ; Remote sensing ; Rhône-Alpes ; Soil erosion ; Thematic Mapper ; Vegetation
A study was carried out to assess the potential use of satellite thematic mapper (TM) images to produce maps of vegetation-related variables for erosion modelling. In a Mediterranean study area in southern France (Ardèche) the (semi-)natural
vegetation was described at 33 field plots using four quantitative methods. After radiometric correction of the image, the spectral TM bands were processed following three different methods. A conclusion is that a balance has to be found between the more
Etude phytogéographique et synsociologique de 3 régions du sud du Liefdefjord. Réalisation de 3 cartes présentant la végétation de ces régions et la densité de la couverture végétale. Mise en évidence de 24 unités de végétation et des variations
Le paysage entre la steppe d'Anatolie et la crête des monts Taurus est très hétérogène. La végétation naturelle a été profondément modifiée par l'exploitation du bois et le pâturage. Grâce aux images satellites on a pu classifier la végétation selon
Le problème de l'élaboration de la légende d'une carte écologique et phytocénologique est étudié en prenant pour exemple la végétation de steppe sèche du plateau de Turgai au Kazakhstan. Les principaux facteurs de la sélection et de la construction
de la légende sous la forme d'un tableau sont examinés. En combinant des taxons de la végétation en une série écologique et dynamique on a la possibilité d'obtenir simultanément de l'information sur la composition et la structure de la végétation, sur
Typological and spatial differentiation of the actual vegetation in the Pinczów sub-district (Nida Syncline). Phytosociological records used in the local typology work had been taken in 1984-1991. 87 basic typological units are discerned: 52 well
-characterized associations and 22 community types of local application only. The local typology of vegetation communities allowed for the drawing-up of a key for mapping and a preliminary version of the legend for a map of actual vegetation, carried out
Crue ; Dynamique de la végétation ; Dynamique du paysage ; Ecoulement ; Enseignement de la géographie ; Etats-Unis ; Géographie physique ; Pédagogie
Flood ; Landscape dynamics ; Pedagogy ; Physical geography ; Runoff ; Teaching of geography ; United States of America ; Vegetation dynamics
Taking pictures of the same place across the years or through the seasons of a year is a valuable method for portraying movements as stream channels, deltas, floods, glaciers and vegetation. Examples provided from North America. Suggestions
Plant remains in the Sierra Bacha packrat midden series permit the first reconstruction of Holocene vegetation and climate for the coast of the Gulf of California. Discussion of their paleoclimatic implications and their contradiction
Couvert végétal ; Dynamique de la végétation ; France ; Incendie de forêt ; Inventaire floristique ; Provence-Alpes-Côte d'Azur ; Télédétection ; Var ; Végétation
Flora inventory ; Forest fire ; France ; Plant canopy ; Provence-Alpes-Côte d'Azur ; Remote sensing ; Var ; Vegetation ; Vegetation dynamics
Application de la méthode cartographique à l'étude de processus de la modification de la végétation dans les géosystèmes aux 19e et 20e siècles, le cas de la Mazovie
Action anthropique ; Cartographie thématique ; Mazowsze ; Pologne ; Siècle 19-20 ; Utilisation du sol ; Végétation
Human impact ; Land use ; Poland ; Thematic mapping ; Vegetation
The combination method of research and ecological interpretation of the manner of changes in land use (on the basis of the process of transformation occurring in the vegetational landscapes of Poland's Mazowsze Region in the last 200 years).
correspondance avec des zones de végétation n'a pas encore été résolue de façon satisfaisante. Un nouveau calcul de l'évapotranspiration potentielle a permis de présenter de nouvelles cartes d'une division hydroclimatique des continents. - (D. Rouvière).
The subject of phytoindicative analysis were plant communities in the Pinczów model area belonging to 49 phytocoenoses. The aim of the research was to describe spatial variation in the ecological requirements of vegetation in relation to soil
A geobotanical regionalization of the Pinczów area was carried out on the basis of the spatial differentiation in the potential vegetation, and particularly the shape, size, manner of bordering and spatial distribution of different types of habitat