DOI: 10.1016/j.foreco.2015.05.006
Scopus记录号: 2-s2.0-84945466376
论文题名: Fire reintroduction increased longleaf pine (Pinus palustris L.) recruitment and shifted pine demographics in a long-unburned xeric sandhill assemblage
作者: Shappell L.J. ; Koontz S.M.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2015
卷: 354 起始页码: 344
结束页码: 352
语种: 英语
英文关键词: Adaptive management
; Life stages
; Pinus palustris
; Prescribed fire
; Restoration
; Sandhill community
Scopus关键词: Forestry
; Hardwoods
; Image reconstruction
; Population dynamics
; Population statistics
; Reforestation
; Adaptive Management
; Life stages
; Pinus palustris
; Prescribed fires
; Sandhill community
; Fires
; adaptive management
; coniferous tree
; demography
; forest management
; intraspecific interaction
; prescribed burning
; reintroduction
; restoration ecology
; savanna
; species diversity
; United States
; Pinus palustris
英文摘要: Adaptive management methods are best for ensuring management goals are met when implementing prescribed fire to areas of fire exclusion. Prior to intense logging and subsequent fire suppression efforts of the early 1900s, longleaf pine (Pinus palustris) woodlands dominated the southeastern United States. As a pyrogenic forest type, natural wildfires occur with a 2-15year fire return interval. Remaining longleaf forests are predominantly second-growth, with current vegetation structure reflecting decades of fire exclusion resulting from continued suppression efforts. Research in longleaf savannas has demonstrated that hardwood encroachment, reduced floristic diversity, and reduced longleaf yearling establishment occurs in the absence of fire. However, few studies have examined the potential role of prescribed fire management in moderating longleaf pine regeneration in second-growth xeric sandhill assemblages. Over a seven year period of fire reintroduction, we examined the effects of prescribed fire on longleaf pine demographics and structure in a forest that experienced a significant reduction in fire frequency during the 20th century. We observed no difference in overstory composition or hardwood density between burned and adjacent unburned areas. Understory woody stem density (DBH<2cm) was dominated by juvenile longleaf plants, which likely caused greater variability in light reaching the forest floor in unburned vs. burned areas. Significant shifts in demographic structure were evident in juvenile longleaf plants that initiated height growth following the onset of prescribed fire treatments. Longleaf yearling density (<1year old) averaged 5plantsm-2 (unburned <1plantm-2) and was positively correlated with fire frequency. Greater accumulation of leaf litter in unburned (10cm) vs. burned areas (5cm) likely influenced yearling recruitment, as expected given the species' need for contact with bare mineral soil for germination. Unlike pine savannas where reduction of hardwoods is often the target of management, intraspecific interactions (i.e. negative density dependence) likely play a greater role in successful longleaf recruitment and population demography in this sandhill assemblage. This study further highlights the utility of implementing and observing a range of fire applications when reintroducing fire to long unburned systems. © 2015 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65321
Appears in Collections: 影响、适应和脆弱性
There are no files associated with this item.
作者单位: Coastal Carolina University, Department of Biology, Box 261954, Conway, SC, United States; Archbold Biological Station, 123 Main Dr., Venus, FL, United States
Recommended Citation:
Shappell L.J.,Koontz S.M.. Fire reintroduction increased longleaf pine (Pinus palustris L.) recruitment and shifted pine demographics in a long-unburned xeric sandhill assemblage[J]. Forest Ecology and Management,2015-01-01,354