Environmental controls of diatom species in northeast Pacific sediments

Non-linear, unimodal techniques are suitable for estimation of environmental properties in the northeast (NE) Pacific based on fossil diatom taxa (species and/or species groups) found in modern (core-top) sediments. Canonical Correspondence Analysis (CCA), a constrained ordination technique, discern...

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Published inPalaeogeography, palaeoclimatology, palaeoecology Vol. 297; no. 1; pp. 188 - 200
Main Authors Lopes, C., Mix, A.C., Abrantes, F.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.11.2010
Subjects
Bacillariophyceae
Canonical Correspondence Analysis
Diatoms
Environmental variables
Modern calibrations
Canonical Correspondence Analysis
Diatoms
Modern calibrations
Environmental variables
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Summary:Non-linear, unimodal techniques are suitable for estimation of environmental properties in the northeast (NE) Pacific based on fossil diatom taxa (species and/or species groups) found in modern (core-top) sediments. Canonical Correspondence Analysis (CCA), a constrained ordination technique, discerned best-fit relationships among two multivariate datasets (the floral and the environmental) and thus yielded insight into the environmental variables that best explain the species variance within diatom populations. Based on these insights, we developed predictive functions for annual Primary Productivity (PP) and seasonal range of sea Sea-Surface Temperature using unimodal models and cross validation techniques. Estimates of annual PP (r 2 jack = 0.92; RMSEP = 91.94 gC/m 2/y) explained the highest percentage of variance in the core-top diatom record (22.1%).
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ISSN:0031-0182
1872-616X
DOI:10.1016/j.palaeo.2010.07.029