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Defining Old Growth for Fire-adapted Forests of the Western United States Ecology and Society
Kaufmann, Merrill R.; U.S. Forest Service (retired); mkaufmann@fs.fed.us; Binkley, Daniel; Colorado Forest Restoration Institute; dan@cnr.colostate.edu; Johnson, Marlin; U.S. Forest Service, Southwest Region; majohnson02@fs.fed.us; Stephens, Scott L.; University of California Berkeley; stephens@nature.berkeley.edu; Swetnam, Thomas W.; Lab of Tree Ring Research, University of Arizona; tswetnam@ltrr.arizona.edu.
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...
Tipo: Peer-Reviewed article 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.
Ano: 2007
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Impact of invasion by molasses grass (Melinis minutifloraP. Beauv.) on native species and on fires in areas of campo-cerrado in Brazil Acta Botanica
Rossi,Rafael Drumond; Martins,Carlos Romero; Viana,Pedro Lage; Rodrigues,Evandro Luís; Figueira,José Eugênio Côrtes.
In the Cerrado Biome of Brazil, African grasses constitute a serious problem, occurring in virtually all protected areas. Molasses grass (Melinis minutiflora P. Beauv.) accumulates more biomass than do most other species of the herbaceous stratum vegetation native to the Cerrado. In this study, our aim was to determine the impact of M. minutiflora on native vegetation, as well as (using simulations of fire traits) on the characteristics of fires, in invaded areas of the Serra do Rola-Moça State Park (Parque Estadual da Serra do Rola-Moça, PESRM), a protected area where fires are frequent, in the state of Minas Gerais, Brazil. Our main results are that M. minutiflora considerably increases the amount of biomass, becoming the main combustible plant in the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cerrado; BehavePlus; Biological invasion; Fire intensity; Savannah.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062014000400018
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