The Mexican Plateau, in its magnificent dimensions and material wealth, stood among the first and perhaps most alluring discoveries of European explorers. Bur ied deeper in the verbal histories of a now vanquished people, the American Indians, must be the primordial human awareness of the inverted complex triangle that dominates the Mexican topography, climate and biota. It always has been viewed by man as a source of wealth and a center of authority. The plateau is the pillar upon which all Mexican conquerors have erected their capitols, tilled their crops and mined for their treasure, and...

The Mexican Plateau, in its magnificent dimensions and material wealth, stood among the first and perhaps most alluring discoveries of European explorers. Bur ied deeper in the verbal histories of a now vanquished people, the American Indians, must be the primordial human awareness of the inverted complex triangle that dominates the Mexican topography, climate and biota. It always has been viewed by man as a source of wealth and a center of authority. The plateau is the pillar upon which all Mexican conquerors have erected their capitols, tilled their crops and mined for their treasure, and...

Symposium on Behaviour and Ecology, Saarbrucken, FRG, 1979"

There are many works, written in several European languages, on general, animal, and more especially vegetational ecology, but the space devoted to the study and description of the various ecosystems - both terrestrial and aquatic - of Europe is very limited, and this even in the books of European workers. Indeed, today we are in the strange position that, while some extra-European continents or parts of continents such as South Africa, the west part of South American, Australia, the arid zones of the Old World, not to mention Antarctica (that recentlY has at tracted the attention of a great...

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