globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2015.02.004
论文题名:
Evaluating the use of testate amoebae for palaeohydrological reconstruction in permafrost peatlands
作者: Swindles G.T.; Amesbury M.J.; Turner T.E.; Carrivick J.L.; Woulds C.; Raby C.; Mullan D.; Roland T.P.; Galloway J.M.; Parry L.; Kokfelt U.; Garneau M.; Charman D.J.; Holden J.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2015
卷: 424
起始页码: 111
结束页码: 122
语种: 英语
英文关键词: Arctic ; Palaeohydrology ; Peatlands ; Permafrost ; Testate amoebae ; Transfer function
英文摘要: The melting of high-latitude permafrost peatlands is a major concern due to a potential positive feedback on global climate change. We examine the ecology of testate amoebae in permafrost peatlands, based on sites in Sweden (~200km north of the Arctic Circle). Multivariate statistical analysis confirms that water-table depth and moisture content are the dominant controls on the distribution of testate amoebae, corroborating the results from studies in mid-latitude peatlands. We present a new testate amoeba-based water table transfer function and thoroughly test it for the effects of spatial autocorrelation, clustered sampling design and uneven sampling gradients. We find that the transfer function has good predictive power; the best-performing model is based on tolerance-downweighted weighted averaging with inverse deshrinking (performance statistics with leave-one-out cross validation: R2=0.87, RMSEP=5.25cm). The new transfer function was applied to a short core from Stordalen mire, and reveals a major shift in peatland ecohydrology coincident with the onset of the Little Ice Age (c. AD 1400). We also applied the model to an independent contemporary dataset from Stordalen and find that it outperforms predictions based on other published transfer functions. The new transfer function will enable palaeohydrological reconstruction from permafrost peatlands in Northern Europe, thereby permitting greatly improved understanding of the long-term ecohydrological dynamics of these important carbon stores as well as their responses to recent climate change. © 2015 Elsevier B.V.
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被引频次[WOS]:44   [查看WOS记录]     [查看WOS中相关记录]
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68993
Appears in Collections:过去全球变化的重建

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作者单位: Water@leeds, School of Geography, University of Leeds, United Kingdom; Geography, College of Life and Environmental Sciences, University of Exeter, United Kingdom; Institute of Integrative Biology and Institute of Zoology, University of Liverpool, United Kingdom; School of Geography, Archaeology and Palaeoecology, Queen's University, Belfast, United Kingdom; Natural Resources Canada/Ressources naturelles Canada, Geological Survey of Canada/Commission géologique du Canada, Calgary, AB, Canada; Department of Geosciences and Natural Resource Management, Center for Permafrost (CENPERM), University of Copenhagen, Copenhagen, Denmark; Département de Géographie and GEOTOP, Université du Québec à Montréal, Montréal, QC, Canada

Recommended Citation:
Swindles G.T.,Amesbury M.J.,Turner T.E.,et al. Evaluating the use of testate amoebae for palaeohydrological reconstruction in permafrost peatlands[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2015-01-01,424
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