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The main concepts and definitions related to dynamic-catenal phytosociology are presented and discussed, in order to share common definitions within the French national program CarHAB dedicated to serial and catenal vegetation typology and mapping. Symphytosociology is based on serial approach and on the vegetation series concept, while Geosymphytosociology is based on catenal approach and on the geoseries concept.

A series of elementary trials was conducted to study the grazing capacity of the major plains areas in the Etosha National Park. The yield data were compared with rainfall and game census data. The results suggest that the ChudopTwee Palms area is severely overgrazed and that Gemsbokvlakte, Charitsaubvlakte and Andonivlakte are usually overgrazed. Grootvlakte is not overgrazed during the rainy season. UITTREKSEL 'n Reeks eenvoudige proewe is uitgevoer om die drakrag van die belangrikste vlaktes van die Nasionale Etoshawildtuin te bepaal. Die opbrengsgegewens is met reënval en wildsensus gegewens vergelyk. Die resultate dui daarop dat dieChudop-Twee Palms gebied straf oorbewei is en dat Gemsbokvlakte, Charitsaubvlakte en Andonivlakte gewoonlik oorbewei is, Grootvlakte word nie gedurend die reënseison oorbenut nie.