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FIRE IN AMAZONIAN SELECTIVELY LOGGED RAIN FOREST AND THE POTENTIAL FOR FIRE REDUCTION

1997; Wiley; Volume: 7; Issue: 2 Linguagem: Inglês

10.1890/1051-0761(1997)007[0713

1939-5582

Andrew R. Holdsworth, Christopher Uhl,

Ecology and Vegetation Dynamics Studies

Ecological ApplicationsVolume 7, Issue 2 p. 713-725 Article FIRE IN AMAZONIAN SELECTIVELY LOGGED RAIN FOREST AND THE POTENTIAL FOR FIRE REDUCTION Andrew R. Holdsworth, Andrew R. Holdsworth Instituto do Homen e Meio Ambiente da Amazonia (IMAZON), Caixa Postal 1015, Belém, Pará 66.000 Brazil and Center for Environmental Studies, Brown University, Providence, Rhode Island 02912 USA Affiliation in Brazil: Instituto do Homen e Meio Ambiente da Amazonia (IMAZON).Search for more papers by this authorChristopher Uhl, Christopher Uhl Biology Department, Pennsylvania State University, University Park, Pennsylvania 16802 USA Affiliation in Brazil: Instituto do Homen e Meio Ambiente da Amazonia (IMAZON). Author to whom correspondence should be addressed.Search for more papers by this author Andrew R. Holdsworth, Andrew R. Holdsworth Instituto do Homen e Meio Ambiente da Amazonia (IMAZON), Caixa Postal 1015, Belém, Pará 66.000 Brazil and Center for Environmental Studies, Brown University, Providence, Rhode Island 02912 USA Affiliation in Brazil: Instituto do Homen e Meio Ambiente da Amazonia (IMAZON).Search for more papers by this authorChristopher Uhl, Christopher Uhl Biology Department, Pennsylvania State University, University Park, Pennsylvania 16802 USA Affiliation in Brazil: Instituto do Homen e Meio Ambiente da Amazonia (IMAZON). Author to whom correspondence should be addressed.Search for more papers by this author First published: 01 May 1997 https://doi.org/10.1890/1051-0761(1997)007[0713:FIASLR]2.0.CO;2Citations: 216 Present address: Institute for the Study of Planet Earth, 1439 East Helen Street, Tucson, Arizona 85721 USA. Author to whom correspondence should be addressed. Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Abstract Approximately 8000 km2 of Brazilian Amazon forest are selectively logged each year. Although virgin forest in eastern Amazonia is generally immune to fire, selectively logged forests are susceptible to fire. In eastern Amazonia we employed permanent-plot studies, forest fuel moisture measurements, and hemispheric canopy photographs to study the impacts of fire on a selectively logged forest, the microclimatic conditions that foster forest fires, and the measures that loggers might take to reduce fire incidence. Significant tree mortality followed a typical ground fire in a selectively logged forest. Forty-four percent of all trees ≥10 cm in diameter at breast height died in a burned plot while only 3% died in an unburned plot. In large logging gaps the density of regenerating pioneer species increased by >60% in burned plots 15 mo after the fire, while it decreased by >40% in unburned plots. The rate of fuel drying in selectively logged forest was influenced by photon flux density (PFD), time since logging, and logging techniques. There was a significant (P = 0.005) negative correlation between PFD and the number of days fuel sticks required to reach the point where fire could spread. In a recently logged forest, large logging gaps (>700 m2) reached fire susceptibility after 6 d, and medium-sized logging gaps (≈200–700 m2) reached fire susceptibility after 15 d. But fire susceptibility declines over time as logging gaps become densely packed with saplings; fuel moisture conditions in large gaps of forest selectively logged 4 yr earlier were similar to those found in virgin forest, thus reducing the likelihood of fire. Careful logging also can reduce the likelihood of fire. Special low-impact logging techniques remove the same amount of timber as do the more typical high-impact logging techniques, but fire is significantly less likely because the more careful operation avoids the creation of large logging gaps, the most fire susceptible areas. Citing Literature Volume7, Issue2May 1997Pages 713-725 RelatedInformation