DOI: 10.1016/j.quascirev.2017.09.001
Scopus记录号: 2-s2.0-85029035773
论文题名: Late-Quaternary records of vegetation and fire in southeastern North Carolina from Jones Lake and Singletary Lake
作者: Spencer J. ; Jones K.B. ; Gamble D.W. ; Benedetti M.M. ; Taylor A.K. ; Lane C.S.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2017
卷: 174 起始页码: 33
结束页码: 53
语种: 英语
英文关键词: Lake sediment
; Macroscopic charcoal
; North America
; Paleoenvironmental
; Paleolimnology
; Pollen
; Quaternary
; Stable isotopes
Scopus关键词: Analytical geochemistry
; Charcoal
; Deforestation
; Ecology
; Fires
; Geochemistry
; Lakes
; Paleolimnology
; Vegetation
; Lake sediments
; North America
; Paleoenvironmental
; Pollen
; Quaternary
; Stable isotopes
; Climate change
; Quercus
英文摘要: We conducted fossil pollen, charcoal, and geochemical analyses of sediment cores from Jones Lake and Singletary Lake spanning the last ∼50,000 cal yr B.P. to examine the linkages between climate, vegetation, and fire activity on the Atlantic Coastal Plain, and particularly emphasize changes since the Last Glacial Maximum. Application of the modern analog technique (MAT) to fossil pollen data allowed for quantitative estimates of Holocene climate, but Pleistocene assemblages had no modern analogues preempting their use for quantitative reconstructions. The MAT data indicate markedly lower mean annual precipitation and temperatures during the late Pleistocene relative to the Holocene. Increased charcoal accumulation during interstadials indicates increased fire activity during these warm intervals. Geochemical data (δ13C, δ15N, C:N) and pollen concentrations indicate a sparsely-vegetated Pleistocene landscape that produced few fires followed by an increase in biomass and fire activity around the lakes during the Holocene transition. A Quercus spp. maximum in the early Holocene is associated with low charcoal abundances, while increased dominance of Pinus spp. during the middle Holocene is associated with dramatic increases in charcoal. It is unclear if the Quercus-Pinus transition was the result of changing fire regimes or if the fire regime changed in response to vegetation. The regional asynchronicity of the Quercus-Pinus transition may indicate another forcing mechanism besides climate change, such as prehistoric human activity, is responsible for the ecological change. Macroscopic charcoal and C:N ratios reach unprecedented values during the late Holocene, possibly as a result of deforestation by both prehistoric Native Americans and later immigrant populations. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59091
Appears in Collections: 过去全球变化的重建
There are no files associated with this item.
作者单位: Department of Earth and Ocean Sciences, University of North Carolina Wilmington, Wilmington, NC, United States
Recommended Citation:
Spencer J.,Jones K.B.,Gamble D.W.,et al. Late-Quaternary records of vegetation and fire in southeastern North Carolina from Jones Lake and Singletary Lake[J]. Quaternary Science Reviews,2017-01-01,174