An alternative approach to transfer functions? Testing the performance of a functional trait-based model for testate amoebae

Simon Van Bellen* (Corresponding Author), Dimitri Mauquoy, Richard J. Payne, Thomas P. Roland, Paul D.M. Hughes, Tim J. Daley, Neil J. Loader, F. Alayne Street-Perrott, Emma M. Rice, Verónica A Pancotto

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)
8 Downloads (Pure)


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.
Original languageEnglish
Pages (from-to)173-183
Number of pages11
JournalPalaeogeography Palaeoclimatology Palaeoecology
Early online date12 Dec 2016
Publication statusPublished - 15 Feb 2017

Bibliographical note

This work was supported by the Natural Environment Research Council (grant numbers NE/I022809/1, NE/I022981/1, NE/I022833/1 and NE/I023104/1). RJP acknowledges support from the Russian Scientific Fund (grant 14-14-00891). We would like to thank Edward Mitchell, Graeme Swindles and an anonymous reviewer for reviewing an earlier draft of the paper.


  • Ombrotrophic
  • validation
  • Patagonia
  • Holocene
  • sphagnum
  • peatland


Dive into the research topics of 'An alternative approach to transfer functions? Testing the performance of a functional trait-based model for testate amoebae'. Together they form a unique fingerprint.

Cite this