PROJETO RADAM

ABSTRACT
The phytogeographic study of Sheet SA.23 (SSo Luis) and part of Sheet
SA.24 (Fortaleza), corresponding to an area of about 192.290sq. km., is
presented. Mapping was based on radar imagery, which permitted the
interpretation of four ecological regions (Steppe, Deciduous Forest,
Evergreen Forest and Pioneer Formations) and of three contact areas
(Savanna/Steppe, Steppe/Savanna/Deciduous Forest and Savanna/Deciduous
Forest).
These different types of vegetation, living side-by-side, suggest a climatic
analogy among them which was studied by the ombrothermic curves of
Gaussen.
The ecological regions named show reasonable renewable natural resources
with different utilizations, namely:
1. Evergreen and Deciduous Forests, separated in:
a) areas of closed forest, capable to support a forest
economy based on species of known economic value
and on other species of yet less known qualities;
b) babaçu area, whose exploitation is an important factor
in regional economy.
2. Savanna and Steppe, where the action of man is degrading
the already poor renewable natural resources of the regions;
3. Pioneer Formations, whose economic potential practically
rests on the use of natural grassland and on mangrove, of
large application in tannin preparation.
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