DOI: 10.1016/j.palaeo.2016.11.039
论文题名: The vegetation history of an Amazonian domed peatland
作者: Kelly T.J. ; Lawson I.T. ; Roucoux K.H. ; Baker T.R. ; Jones T.D. ; Sanderson N.K.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2017
卷: 468 起始页码: 129
结束页码: 141
语种: 英语
英文关键词: Geochemistry
; Holocene
; Pole forest
; Pollen analysis
; Tropical peatland
; Vegetation change
英文摘要: The peatland pole forests of the Pastaza-Marañón Foreland Basin (PMFB), Peru, are the most carbon-dense ecosystems known in Amazonia once below ground carbon stores are taken into account. Here we present the first multiproxy palaeoenvironmental record including pollen data from one of these peatlands, San Jorge in northern Peru, supported by an age model based on radiocarbon and 210Pb dating. The pollen data indicate that vegetation changes during the early phases of peat initiation resulted from autogenic succession in combination with fluvial influence. The overall pattern of vegetation change is not straightforward: the record does not reflect a process of unidirectional, progressive terrestrialization, but includes a reversal in the succession and vegetation transitions, which omit predicted successional phases. This complexity is similar to that seen in the only other existing pollen record from a PMFB peatland, at Quistococha, but contrasts with peat records from Panama and Southeast Asia where successional patterning appears more predictable. Our dating results provide the first evidence from a PMFB peatland that peat accumulation may have been discontinuous, with evidence for reduced rates of peat accumulation, or a possible hiatus, around 1300–400 cal yr BP. An ecological shift from open lake to palm swamp occurs at this time, possibly driven by climatic change. The pollen data indicate that the present pole forest vegetation at San Jorge began to assemble c. 200–150 cal yr BP. Given this young age, it is likely that the pole forest at this site remains in a state of transition. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/67960
Appears in Collections: 过去全球变化的重建
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作者单位: School of Geography, University of Leeds, Leeds, United Kingdom; Department of Geography and Sustainable Development, University of St Andrews, Irvine Building, North Street, St Andrews, United Kingdom; Lancaster Environment Centre, Lancaster University, Lancaster, United Kingdom; Department of Geography, University of Exeter, Armory Building, Rennes Drive, Exeter, United Kingdom
Recommended Citation:
Kelly T.J.,Lawson I.T.,Roucoux K.H.,et al. The vegetation history of an Amazonian domed peatland[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2017-01-01,468