globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2016.12.005
论文题名:
An alternative approach to transfer functions? Testing the performance of a functional trait-based model for testate amoebae
作者: van Bellen S.; Mauquoy D.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2017
卷: 468
起始页码: 173
结束页码: 183
语种: 英语
英文关键词: Holocene ; Ombrotrophic ; Patagonia ; Peatland ; Sphagnum ; Validation
英文摘要: Transfer functions are now widely available to infer past environmental conditions from biotic assemblages. Existing transfer functions are based on species assemblages but an alternative is to characterize assemblages based on functional traits, characteristics of the organism which determine its fitness and performance. Here, we test the potential of trait-based transfer functions using testate amoeba functional traits to reconstruct peatland water-table depths. A total of seven functional traits with linkages to peat moisture content were identified and quantified as community weighted-means for each of 43 taxa in a training set from Tierra del Fuego, South America. Transfer functions based on (multiple) linear regression and partial least-squares were produced, validated using cross-validation and an independent test set, and applied to three core records. Trait-based models performed remarkably well. Model performance based on cross-validation and an independent test set was only marginally weaker than for models based on species and reconstructed down-core trends were extremely similar. Trait-based models offer considerable potential for paleoecological reconstruction particularly in no-analogue situations, where no species transfer function is available and for inexperienced analysts. The approach deserves further validation and testing for both testate amoebae and other groups of microfossils. © 2016 The Authors
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/67974
Appears in Collections:过去全球变化的重建

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作者单位: School of Geosciences, University of Aberdeen, United Kingdom; Environment Department, University of York, United Kingdom; Geography and Environment, University of Southampton, United Kingdom; Sustainable Earth Institute, University of Plymouth, United Kingdom; Department of Geography, College of Science, Swansea University, United Kingdom; School of Geography, University of Plymouth, United Kingdom; CADIC/CONICET, Argentina

Recommended Citation:
van Bellen S.,Mauquoy D.. An alternative approach to transfer functions? Testing the performance of a functional trait-based model for testate amoebae[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2017-01-01,468
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