globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2013.06.003
论文题名:
Examining the role of allogenous and autogenous factors in the long-term dynamics of a temperate headwater peatland (southern Québec, canada)
作者: Lavoie M.; Pellerin S.; Larocque M.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2013
卷: 386
起始页码: 336
结束页码: 348
语种: 英语
英文关键词: Canada ; Macrofossil ; Paleoclimate ; Paleoecology ; Peatland ; Testate amoebae
英文摘要: Plant macrofossil and testate amoebae analyses were conducted on a sedimentary core taken from a headwater peatland located near the summit of a hill at the northern extension of the Adirondack Mountains (Québec, Canada). The aims were to reconstruct the developmental stages of the peatland and to examine the allogenous and autogenous factors associated with its long-term dynamics. Results were compared with a quantitative paleoclimatic reconstruction based on the modern analog technique using pollen data from the same core. The long-term development of the peatland (pond-rich fen-intermediate fen-poor fen-bog) mainly reflects an autogenous hydroseral succession. Active peat accumulation under the relatively dry climate of the Early Holocene suggests that summer temperature was a critical factor in peat accumulation through enhanced biomass production. A major long-term decrease in net peat accumulation rates and a progressive decline of mean water-table depth occurred during the Mid- to Late-Holocene (7900-500. cal. yr BP), even though annual precipitation was abundant at the time. The high summer temperature associated to the highest evapotranspiration rates maintained a low water table which in turn led to strong humification of the peat. A similar, synchronous pattern in vertical peat accumulation dynamics characterized another nearby peatland. Based on these results, we suggest that small peatlands situated atop a watershed and/or within a small watershed are ecosystems sensitive to changes in precipitation and/or evapotranspiration, due to their limited water supply. © 2013 Elsevier B.V.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69672
Appears in Collections:过去全球变化的重建

Files in This Item:

There are no files associated with this item.


作者单位: Département de géographie and Centre d'études nordiques, Université Laval, Québec QC G1V 0A6, Canada; Institut de recherche en biologie végétale and Jardin botanique de Montréal, Université de Montréal, 4101 Sherbrooke est, Montréal QC H1X 2B2, Canada; Département des sciences de la Terre et de l'atmosphère, Université du Québec à Montréal, C.P. 8888, Succursale Centre-Ville, Montréal QC H3C 3P8, Canada; Centre de Recherche pour l'étude, Université du Québec à Montréal, C.P. 8888, Succursale Centre-Ville, Montréal QC H3C 3P8, Canada

Recommended Citation:
Lavoie M.,Pellerin S.,Larocque M.. Examining the role of allogenous and autogenous factors in the long-term dynamics of a temperate headwater peatland (southern Québec, canada)[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2013-01-01,386
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Lavoie M.]'s Articles
[Pellerin S.]'s Articles
[Larocque M.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Lavoie M.]'s Articles
[Pellerin S.]'s Articles
[Larocque M.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Lavoie M.]‘s Articles
[Pellerin S.]‘s Articles
[Larocque M.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.