Fottea 2020, 20(1):1-16 | DOI: 10.5507/fot.2019.010

Mining salinisation of rivers: its impact on diatom (Bacillariophyta) assemblages

Małgorzata B±k1*, Dariusz Halabowski2, Adrian Kryk1, Iga Lewin2, Agnieszka Sowa2
1 Institute of Marine and Environmental Sciences, University of Szczecin, Mickiewicza 16a, 70-383 Szczecin, Poland, *Corresponding author e-mail: malgorzata.bak@usz.edu.pl
2 Institute of Biology, Biotechnology and Environmental Protection, Faculty of Natural Sciences, University of Silesia in Katowice, Bankowa 9, 40-007 Katowice, Poland

The composition of the diatom assemblages was analysed in four rivers of Upper Silesia, Poland in 2017. The diatom assemblages studied were found to reflect anthropogenic salinization caused by mining activities. The assemblages in those rivers characterised by the highest salinity (Bolina and Mleczna) showed a relatively low taxonomic richness. The diatom assemblages were dominated by species typical of brackish or marine waters. The rivers with a minimal or weak anthropogenic impact (Centuria and Mitręga) supported taxonomically richer diatom assemblages typical of mid-altitude siliceous or calcareous streams (respectively), that have a fine particulate substratum. The presence of a new species, Planothidium nanum sp. nov., was revealed. The new species shows a unique set of morphological characters, including small size; its elliptical outline as well as very widely-spaced central striae on the sternum valve (sinus) and widely-spaced central striae on the raphe valve allow to separate it from other similar Planothidium.

Keywords: diatom, mining activities, new species, river salinisation, Upper Silesia, Poland

Received: January 1, 2019; Accepted: August 29, 2019; Prepublished online: January 22, 2020; Published: April 1, 2020  Show citation

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B±k, M., Halabowski, D., Kryk, A., Lewin, I., & Sowa, A. (2020). Mining salinisation of rivers: its impact on diatom (Bacillariophyta) assemblages. Fottea, 20(1), 1-16. doi: 10.5507/fot.2019.010
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