The application of biogeographical techniques to forest site-factor analysis
In southern Africa, stratified, closed canopy forests are regarded as relict from former wetter phases. In the eastern Cape such forests are found on the slopes of the Great Escarpment and at one coastal site at Alexandria. This forest is anomalous
with regard to its coastal situation, substrate, climatic environment and geographical location. Results point to water availability as the principal control of forest distribution in the Alexandria area. (AJC).
Aims of regional ecological research in the Bohemian Forest (Sumava)
A methodical approach for the cognition and evaluation anthropoecological phenomena in the landscape system for eliminating the possibility of arising ecocritial disturbances. Exemple of the Bohemian Forest Mts. (MS).
The output of sediments and solutes from forested and cultivated clayey drainage basins in Luxembourg in Third Benelux Colloquium, Liege.
Bilan sédimentaire de onze bassins-versants forestés et cultivés. La charge en suspension du bassin-versant cultivé de Mosergriecht peut atteindre cinq fois celle du bassin-versant foresté de Keiwelsbaach où la charge soluble est de 50 % et le débit
20 % supérieur. Les hautes teneurs en argiles dispersées sont plus fréquentes dans les bassins-versants forestés où l'écoulement hypodermique intervient dans les macropores et les jointures des sols non perturbés.
Relations sols-composition floristique dans les forêts de la Semois ardennaise. (Soils and forest vegetation of the Semois valley (Belgian Ardennes))
Three silicicolous forest associations of the Semois valley. The chemical charateristics of the humus layers are compared with special attention to acidity, cationic composition of the exchange complex and exchangeable aluminium content.
Causes of late-Atlantic swamp-forest submergence in the central Rhine/Meuse delta in Climatic changes on a yearly to millennial basis.
It is argued that the late-Atlantic phase of swamp-forest submergence in the central part of the Rhine/Meuse delta has no direct paleo-climatic significance. The principle cause was adjustment of the river gradient induced by the seaward
L'organisation des forêts alluviales dans l'axe rhodanien entre Genève et Lyon| comparaison avec d'autres systèmes fluviaux. (Alluvial forest organization in the Upper Rhone Valley| comparison with other fluvial systems)
Fifteen years of observations and collections of data in the alluvial forest of Upper Rhone Valley are used to show the factors which influence riparian vegetation. The structure of the forestal communities depends on topographical, hydrological
The zonal vegetation in the Taihang mountains is dominated by deciduous broad-leaf forest showing strong vertical distribution of sub-types, culminating in sub-alpine shrub meadow at the top. A long history of excessive felling and destruction
to the forests has led to serious erosion. Measures are suggested for the restoration of the ecological balance. (TNC).
Attitudes toward oil and gas development among forest recreationists
Etude de cas dans le Pigeon River Country State Forest dans le Michigan. Longue controverse sur la valeur d'usage de l'arrière-pays. Une enquête effectuée auprès des adeptes des loisirs en forêt pour mieux évaluer les opinions à l'égard de
Historical distribution of forests and grasslands in Gansu Province.
Historical records of the Qin (221-207 BC) and Han (207 BC-220AD) dynasties show that the present day bare hills and parched landscape of Gansu were forest-covered and grasslands supporting large herds of domestic animals. It was due to over
Processes leading to forest regeneration in a mature rain forest of French Guiana were studied on six plots representing initial stages of regeneration, from 2 to 10 years following clear-cutting.