Development of a new pan-European testate amoeba transfer function for reconstructing peatland palaeohydrology

QUATERNARY SCIENCE REVIEWS

卷:152

Article

Amesbury, Matthew J.¹  Swindles, Graeme T.²  Bobrov, Anatoly³  Charman, Dan J.¹  Holden, Joseph²  Lamentowicz, Mariusz^4,5  Mallon, Gunnar⁶  Mazei, Yuri^7,8  Mitchell, Edward A. D.⁹  Payne, Richard J.^6,10  Roland, Thomas P.¹  Turner, T. Edward²  Warner, Barry G.¹¹ 

[1] Univ Exeter, Coll Life & Environm Sci, Geog, Exeter EX4 4QJ, Devon, England

[2] Univ Leeds, Sch Geog, Water Leeds, Leeds LS2 9JT, W Yorkshire, England

[3] Lomonosov Moscow State Univ, Fac Soil Sci, Moscow, Russia

[4] Adam Mickiewicz Univ, Fac Geog & Geol Sci, Lab Wetland Ecol & Monitoring, PL-61712 Poznan, Poland

[5] Adam Mickiewicz Univ, Fac Geog & Geol Sci, Dept Biogeog & Palaeoecol, PL-61712 Poznan, Poland

[6] Univ Sheffield, Dept Geog, Sheffield S10 2TN, S Yorkshire, England

[7] Penza State Univ, Dept Zool & Ecol, Penza, Penzenskaya Obl, Russia

[8] Lomonosov Moscow State Univ, Dept Hydrobiol, Moscow, Russia

[9] Univ Neuchatel, Fac Sci, Inst Biol, CH-2000 Neuchatel, Switzerland

[10] Univ York, Environm, York YO10 5DD, N Yorkshire, England

[11] Univ Waterloo, Earth & Environm Sci, Waterloo, ON N2L 3G1, Canada

关键词: Testate amoeba;    Peatland;    Water table;    Transfer function;    Europe;    Spatial scale;    Data compilation;    Taxonomy;   

DOI  :  10.1016/j.quascirev.2016.09.024

来源: Elsevier

【 摘 要 】

In the decade since the first pan-European testate amoeba-based transfer function for peatland palaeohydrological reconstruction was published, a vast amount of additional data collection has been undertaken by the research community. Here, we expand the pan-European dataset from 128 to 1799 samples, spanning 35 degrees of latitude and 55 degrees of longitude. After the development of a new taxonomic scheme to permit compilation of data from a wide range of contributors and the removal of samples with high pH values, we developed ecological transfer functions using a range of model types and a dataset of similar to 1300 samples. We rigorously tested the efficacy of these models using both statistical validation and independent test sets with associated instrumental data. Model performance measured by statistical indicators was comparable to other published models. Comparison to test sets showed that taxonomic resolution did not impair model performance and that the new pan-European model can therefore be used as an effective tool for palaeohydrological reconstruction. Our results question the efficacy of relying on statistical validation of transfer functions alone and support a multi-faceted approach to the assessment of new models. We substantiated recent advice that model outputs should be standardised and presented as residual values in order to focus interpretation on secure directional shifts, avoiding potentially inaccurate conclusions relating to specific water-table depths. The extent and diversity of the dataset highlighted that, at the taxonomic resolution applied, a majority of taxa had broad geographic distributions, though some morphotypes appeared to have restricted ranges. (C) 2016 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

【 授权许可】

Free