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Size Fraction Effects on Planktonic Foraminifera Assemblages: A Compositional Contribution to the Golden Sieve Rush

A comparative study of Last Glacial to Holocene planktonic foraminiferal assemblages obtained from 150 to 106 m size fractions of a Tyrrhenian sea core was carried out by means of compositional data analysis methods. The results show a major loss of small-sized species in the 150 m size fraction, resulting in underdetection limit values for several Holocene samples. Statistical tests, performed by means of contrast and bootstrap, indicate that the assemblages obtained differ statistically. Nevertheless, despite the drawbacks of the analysis based on the 150 m fraction, these differences do not imply, in the compositional data analysis approach, a significant change in covariance structure. Under compositional data analysis, covariance-based analysis should give similar results regardless of the size fraction adopted, while distance-based ones may give partly different results. The 106 m size fraction, in which both large and small-sized species are sufficiently represented, is proposed for adoption in future studies focussing on palaeoclimatic reconstruction

This research was supported by the Ministerio de Economia y Competividad under the project METRICS Ref. MTM2012-33236; by the Agencia de Gestio d’Ajuts Universitaris i de Recerca of the Generalitat de Catalunya under the project Ref. 2009SGR424. The authors would like to thank the anonymous reviewers for their valuable comments and suggestions to improve the quality of the paper.

© Mathematical Geosciences, 2015, vol. 47, núm. 4, p. 455-470

Springer Verlag

Autor: Di Donato, Valentino
Daunis i Estadella, Josep
Martín Fernández, Josep Antoni
Esposito, Paola
Data: maig 2015
Resum: A comparative study of Last Glacial to Holocene planktonic foraminiferal assemblages obtained from 150 to 106 m size fractions of a Tyrrhenian sea core was carried out by means of compositional data analysis methods. The results show a major loss of small-sized species in the 150 m size fraction, resulting in underdetection limit values for several Holocene samples. Statistical tests, performed by means of contrast and bootstrap, indicate that the assemblages obtained differ statistically. Nevertheless, despite the drawbacks of the analysis based on the 150 m fraction, these differences do not imply, in the compositional data analysis approach, a significant change in covariance structure. Under compositional data analysis, covariance-based analysis should give similar results regardless of the size fraction adopted, while distance-based ones may give partly different results. The 106 m size fraction, in which both large and small-sized species are sufficiently represented, is proposed for adoption in future studies focussing on palaeoclimatic reconstruction
This research was supported by the Ministerio de Economia y Competividad under the project METRICS Ref. MTM2012-33236; by the Agencia de Gestio d’Ajuts Universitaris i de Recerca of the Generalitat de Catalunya under the project Ref. 2009SGR424. The authors would like to thank the anonymous reviewers for their valuable comments and suggestions to improve the quality of the paper.
Format: application/pdf
ISSN: 1874-8961 (versió paper)
1874-8953 (versió electrònica)
Accés al document: http://hdl.handle.net/10256/10922
Llenguatge: eng
Editor: Springer Verlag
Col·lecció: MINECO/PN 2013-2015/MTM2012-33236
AGAUR/2009-2014/2009 SGR-424
Reproducció digital del document publicat a: http://dx.doi.org/10.1007/s11004-014-9529-y
Articles publicats (D-IMA)
És part de: © Mathematical Geosciences, 2015, vol. 47, núm. 4, p. 455-470
Drets: Tots els drets reservats
Matèria: Anàlisi multivariable
Multivariate analysis
Estadística matemàtica
Mathematical statistics
Paleoclimatologia -- Mètodes estadístics
Paleoclimatology -- Statistical methods
Títol: Size Fraction Effects on Planktonic Foraminifera Assemblages: A Compositional Contribution to the Golden Sieve Rush
Tipus: info:eu-repo/semantics/article
Repositori: DUGiDocs

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