A new paper in Oceanological and Hydrobiological Studies reports a massive bloom of Pleodorina indica in a reservoir in central Poland. Piotr Knysak and Joanna Żelazna-Wieczorek sampled the reservoir on the Olechówka River in Łódź during the summer of 2015 and found that P. indica made up ~95% of the algae collected.
Pleodorina indica is a repeat offender, having been responsible for a 2003 bloom in the River Malše in the Czech Republic:
Knysak P, Żelazna-Wieczorek J (2017) Massive occurrence of the alien invasive species Pleodorina indica (Volvocales, Chlorophyta) in a reservoir located in urban areas of Central Poland. Oceanological and Hydrobiological Studies, 46: 116–122.
Znachor P, Jezberová J (2005) The occurrence of a bloom-forming green alga Pleodorina indica (Volvocales) in the downstream reach of the River Malše (Czech Republic). Hydrobiologia, 541: 221–228.