A review on the controversial physiognomic classification of the Linhares Forest, northern Espírito Santo

Abstract

We present a review of the controversial points of view concerning the physiognomic classification of Linhares Forest, which is defined here as the forest over coastal tablelands that is found between the Rio Doce and the Rio Barra Seca, in the north of Espírito Santo. We compiled information about the seasonal climate of such region and analyzed the relationship of both the interannual variation and the seasonality of the rainfall with the ecological attributes of the forest. Our interpretations unveiled that the average monthly rainfall does not express the reality of the biologically dry periods year after year nor does it express the consequences on the vegetation physiognomy. We perceived that Linhares Forest may manifest itself as semideciduous or evergreen, depending on the drought severity within a given period. Thus, we propose that the flexibility of Linhares Forest leaf flush regime must be considered in its classification. We suggest a double classification for the forest: one as a seasonal semideciduous forest during annual or supra-annual periods that are characterized by pronounced water deficit and the other as a seasonal evergreen forest during annual or supra-annual periods with no significant water deficit.

Key words:
water deficit; tableland forest; seasonal semideciduous forest; seasonal evergreen forest; rainfall seasonality