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Provedor de dados:  Ecology and Society
País:  Canada
Título:  Defining Old Growth for Fire-adapted Forests of the Western United States
Autores:  Kaufmann, Merrill R.; U.S. Forest Service (retired);
Binkley, Daniel; Colorado Forest Restoration Institute;
Johnson, Marlin; U.S. Forest Service, Southwest Region;
Stephens, Scott L.; University of California Berkeley;
Swetnam, Thomas W.; Lab of Tree Ring Research, University of Arizona;
Data:  2007-11-16
Ano:  2007
Palavras-chave:  Fire-adapted forests
Fire frequency
Fire intensity
Fire interval
Fire severity
Old-growth forests
Old-growth landscapes
Old-growth patches
Old-growth stands
Resumo:  There are varying definitions of old-growth forests because of differences in environment and differing fire influence across the Intermountain West. Two general types of forests reflect the role of fire: 1) forests shaped by natural changes in structure and species makeup—plant succession—that are driven by competitive differences among species and individual trees and by small-scale disturbances, and 2) forests where plant succession processes are disrupted by major biological disturbances (fire, insects, wind, or drought) extending across larger areas. Some case examples of old-growth forests where fire was historically frequent are used. The examples sketch out the typical biophysical settings, fire regime, natural disturbance factors, spatial features of patches, and the processes and conditions that produce spatial changes of the landscape over time. These examples confirm the complexity of describing or defining old growth in frequent-fire forests. We define fire-adapted forests at three spatial scales, whereas the standard definition of old growth refers to a patch or stand condition. Our definition is based on ecological principles rather than on the cultural aspects of old growth. It focuses on central tendencies, given all the possible combinations of conditions and processes, that move forests toward old growth in the fire-adapted forests of the Intermountain West.
Tipo:  Peer-Reviewed article
Idioma:  Inglês
Identificador:  vol12/iss2/art15/
Editor:  Resilience Alliance
Formato:  text/html application/pdf
Fonte:  Ecology and Society; Vol. 12, No. 2 (2007)

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