Environmental controls of diatom species in northeast Pacific sediments | - CCMAR -

Journal Article

TítuloEnvironmental controls of diatom species in northeast Pacific sediments
Publication TypeJournal Article
AuthorsLopes, C, Mix, AC, Abrantes, F
Year of Publication2010
JournalPalaeogeography, Palaeoclimatology, Palaeoecology
Date PublishedJan-11-2010
Pagination188 - 200
Palavras-chaveDiatoms; Modern calibrations; Environmental variables; Canonical Correspondence Analysis

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 (r2jack = 0.92; RMSEP = 91.94 gC/m2/y) explained the highest percentage of variance in the core-top diatom record (22.1%).

Short TitlePalaeogeography, Palaeoclimatology, Palaeoecology
CCMAR Authors