Support our video The Secret of the Drying Stream in the Czech Polymath competition

In a short video, Petr Pařil reveals the secrets of a hydrobiologist's work in the period when watercourses are drying up. He also introduces you to the DryRivers app, with which you too can map drying streams.

2 Jun 2023 Petr Pařil Zuzana Jayasundera

Petr Pařil, a hydrobiologist from our Institute of Botany and Zoology and director Irina Matusevich during the filming of a video for the Czech All-Science popularization video contest. Photo: Zuzana Jayasundera

The Czech Polymath Popularization Video Competition

The Czech Polymath (Český Vševěd in Czech) 2023 is a popularization competition of the Night of Scientists, whose main goal is to introduce Czech scientists and their workplaces to the public. This year, the competition is starting right now at the end of May. Who will win the title Czech Polymath 2023? You can decide by casting your vote. You can vote for the video of Petr Pařil from our faculty until 15 October 2023 here.

Short video without a single cut

The requirement of the competition is to make a video of maximum 2,5 minutes long, without a single cut. This puts a lot of demands on the filming, and especially on the protagonist, because every overcut or other distraction (in our case it was a passing nursery or the snapping of a dry branch😊) means a new shooting. But in the end, it worked. We filmed the video at the end of April on the drying stream Čertík, which can be found between the Bohunice University Campus and Anthropos.

Hydrobiologist Petr Pařil. Photo: Ludmila Korešová / CC-BY

A disaster for aquatic life is a chance for terrestrial life

DRY − this phrase puts changing climate more and more emphatically into our vocabulary. Dried up small stream beds are becoming a normal part of our lives, turned upside down by extremes of weather. As Central Europeans, we know that a river is supposed to be full of life. Yes, you are right that the water bugs, familiar from Ferda the ant for example, will suffer considerable damage from drought and only the hardiest will survive. But let's take a look at the SECRETS of these new rocky paths from a landlubber's perspective in our video. On the other hand, isn't a dry riverbed a chance for terrestrial invertebrates, plants or even large mammals?

It is these two questions, which aquatic animals survive in drying watercourses and what creatures replace them in arid waterways, that Petr Pařil is seeking to answer in his research. And believe me, he often finds unexpected surprises. What are they? That's the SECRET he'll be happy to reveal in the competition...

Dry watercourses serve as convenient pathways for terrestrial animals. Photo: Petr Pařil
Ants find food in dry streams. Photo: Petr Pařil

Map dry streams with the DryRivers app

Our team of hydrobiologists has developed the DryRivers app to help you map dry streams.

Support our video with your voice

Video The secret of the drying stream can be found here. We will be glad if you like it and support it in the Czech Polymath competition.

Hydrobiologist Petr Pařil on the Čertík stream. Photo: Zuzana Jayasundera
The main performer of the dynamic video is Petr Pařil, who also wrote the script. The video was directed by Irina Matusevič, the camera and post-production was done by Martin Ingr, Benedikt Kyselka was assistant director, production and organization was handled by Zuzana Jayasundera. Photo: Zuzana Jayasundera

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