DOI: 10.1016/j.foreco.2013.02.014
Scopus记录号: 2-s2.0-84875774079
论文题名: Human influences on fire regimes and forest structure in the Chihuahuan Desert Borderlands
作者: Poulos H.M. ; Villanueva Díaz J. ; Cerano Paredes J. ; Camp A.E. ; Gatewood R.G.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 298 起始页码: 1
结束页码: 11
语种: 英语
英文关键词: Fire history
; Fire regimes
; Forest structure
; Pine-oak forest
; Sierra Madre Oriental
; US-Mexico border
Scopus关键词: Fire history
; Fire regimes
; Forest structure
; Pine-oak forest
; Sierra Madre Oriental
; US-Mexico border
; Agriculture
; Conservation
; Land use
; Landforms
; Reforestation
; Fires
; academic research
; anthropogenic effect
; data acquisition
; dendroecology
; forest ecosystem
; forest fire
; grazing
; land use
; landscape
; mountain
; nature conservation
; protected area
; regeneration
; sampling
; seasonality
; spatial variation
; stand structure
; Agriculture
; Conservation
; Forest Fires
; Land Use
; Mexico
; Pinus
; Quercus
; Reforestation
; Texas
; Big Bend National Park
; Chihuahuan Desert
; Coahuila
; Mexico [North America]
; Texas
; United States
; Bos
; Ovis aries
英文摘要: Recent research in isolated sites in southwestern North America suggests that spatial variation in land use history can result in differences in the dates of fire exclusion onset and the extent to which forests have changed in response to fire cessation. We investigated the relationships among fire, land use, and forest structure in three mountain ranges that straddle the Texas-Mexico border including The Davis Mountains Preserve of The Nature Conservancy and Big Bend National Park in west Texas, and The Maderas del Carmen Protected Area in northern Coahuila, Mexico. We quantified fire regime characteristics (frequency, size, severity, and seasonality) and forest stand structure using dendroecology. Frequent low severity fire was a dominant force shaping forest structure and species composition historically. Mean fire return intervals prior to fire exclusion (1700-1900) ranged from 1 to 29. years for fires scarring >25% of the fire-scar samples. The per-sample fire return intervals ranged from 15 to 25. years signifying historically frequent fires at any one location on the landscape. The contemporary period was characterized by a doubling of fire return intervals across all three sites, probably as a result of fire exclusion through livestock (sheep) grazing. The presence of older trees in the tree age data suggested that fires were predominantly low in severity and that tree regeneration occurred during fire free intervals. Our results show that the disruption of frequent, low severity fire regimes in our sites resulted in widespread tree regeneration. This study documents the importance of sheep grazing as a causal factor of fire exclusion in west Texas and northern Mexico, which occurred in the early to mid-1900s, well after the 1880s cattle boom. © 2013 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66624
Appears in Collections: 影响、适应和脆弱性
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作者单位: College of the Environment, Wesleyan University, Middletown, CT 06459, United States; Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias, Centro Nacional de Investigación Disciplinaria Relación Agua-Suelo-Planta-Atmosfera, Gómez Palacio, Durango, Mexico; Yale School of Forestry and Environmental Studies, New Haven, CT 06511, United States; Big Bend National Park, P.O. Box 368, Alpine, TX 79830, United States
Recommended Citation:
Poulos H.M.,Villanueva Díaz J.,Cerano Paredes J.,et al. Human influences on fire regimes and forest structure in the Chihuahuan Desert Borderlands[J]. Forest Ecology and Management,2013-01-01,298