Please use this identifier to cite or link to this item:
Title: Fire frequency and area burned in the Roraima savannas of Brazilian Amazonia
Authors: Barbosa, Reinaldo Imbrozio
Fearnside, Philip Martin
Keywords: Fire Frequency
Greenhouse Gas Emission
Roraima , Brazil
Fire Hazards
Gas Emissions
Greenhouse Effect
Mathematical Models
Regression Analysis
Ecological Modeling
Fire History
Forest Fires
Greenhouse Gases
Mathematical Models
Regression Analysis
South America
Western Hemisphere
Issue Date: 2005
metadata.dc.publisher.journal: Forest Ecology and Management
metadata.dc.relation.ispartof: Volume 204, Número 2-3, Pags. 371-384
Abstract: Estimates were made of the percentage of area burned and the fire frequency in different ecosystems of non-anthropic savannas located in the north and northeast portions of the State of Roraima, Brazil. Three years of observations (June 1997-May 2000) indicated that the mean percentage of area burned annually, weighted for all ecosystems, was 38 ± 12% (S.D.). The mean frequency of fire (number of years for an area to burn again) was 2.5 years. Both parameters are dependent on the type (structure) of vegetation, the altitude of the savanna and the climatic state (dry, wet or normal) of the year of the observation. Using values for 2-month periods over the 3-year time series (n = 18), a simple regression model was developed to forecast percentage area burned for grassy-woody savanna ("clean field" and "dirty field" types), using as the independent variable the mean precipitation in each 2-month period. The proposed model explains 66% of the reported cases. These results are the first developed for savannas in the Amazon region and are directly applicable to calculations of greenhouse-gas emissions from burning in this ecosystem type. © 2004 Elsevier B.V. All rights reserved.
metadata.dc.identifier.doi: 10.1016/j.foreco.2004.09.011
Appears in Collections:Artigos

Files in This Item:
There are no files associated with this item.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.