Sediment diatoms from Upper Paraná River floodplain lakes

Abstract

Considering changes in biodiversity over large time scales, the use of sediments to access knowledge about current and past diversity has recently been highlighted as an emerging field for biodiversity science. Therefore, this work aimed to use lake sediments to perform a taxonomic survey of abundant diatoms from two lakes sediments from the Upper Paraná River floodplain and contributes to new species registrations. For diatom flora analysis were selected sediment samples from lakes. The diatoms with relative abundance ≥ 2% in at least one sediment sample were analyzed and identified under light microscopy. The study resulted in the identification of 47 taxa, including 40 at the specific level and seven possible new taxa. Among the taxa identified, 12 taxa (27%) of these had never before been documented in the Upper Paraná River floodplain.

Two New Species of Achnanthidium Kützing (Achnanthidiaceae) from the Quaternary Sediments of the Colônia Basin, Southeast Brazil

“…2018), and only three have focused on its palaeoecological significance (e.g. Ruwer & Rodrigues 2018, 2021; Ruwer et al . 2021).…”