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Effects of fire protection on savanna structure in Central Brazil
Author(s) -
Moreira Adriana G.
Publication year - 2000
Publication title -
journal of biogeography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 158
eISSN - 1365-2699
pISSN - 0305-0270
DOI - 10.1046/j.1365-2699.2000.00422.x
Subject(s) - transect , geography , vegetation (pathology) , belt transect , fire regime , forestry , fire protection , tropical savanna climate , ecology , abundance (ecology) , nature reserve , woody plant , physiognomy , agroforestry , fire ecology , environmental science , ecosystem , archaeology , biology , medicine , emergency medicine , physics , pathology , astronomy
Aim Fire protection gradually changes the density of woody plants in numerous savannas around the world. In this study changes of structure in two tropical savanna areas with contrasting history of fire protection in the central Brazilian Cerrado is documented. Location Vegetation was sampled with line intercept transects in two adjacent sites in Brasilia, Federal District. These transects were located within a nature reserve protected from fire since 1972 and within an adjacent reserve area that burns every 2 years. Methods Five savanna physiognomies, from a low forest (‘cerradão’) to an open savanna (‘campo sujo’), were sampled in both sites. Results Fire protection increased the abundance of woody plants and favoured fire‐sensitive species. With some exceptions, shrubs tended to be less affected by fire than trees. Species distribution was affected by a complex interaction of fire and physiognomy. Fire had the strongest effect on ‘campo sujo’ savanna, and a less significant effect on the intermediate physiognomies. Main conclusions Protection permits the establishment of fire sensitive species. A long enough protection against fire could lead to the appearance of more wooded physiognomies in the Cerrado.