Abstract

Abstract The value of taphonomic signatures as a source of paleoenvironmental information has been recognized at local and regional environmental scales. In environmentally heterogeneous shallow lakes, the habitat complexity provides an opportunity to evaluate the potential use of taphonomy to uncover environmental differences among within-lake sub-environments. In this contribution, the composition and preservation of diatom assemblages from five sub-environments (free-floating and attached macrophytes, water column, open waters, and littoral sediments) were analyzed in a Pampean shallow lake (Nahuel Ruca, Argentina). Sub-environments differed in depth, macrophyte coverage, and water composition, being these differences reflected both by the composition and preservation of diatom assemblages. Diversity, fragmentation, and dissolution were higher in planktonic and open-waters sedimentary assemblages, whereas fragmentation dominated in littoral sediments. Epiphytic assemblages were the least diverse and sh...

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