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The Scientific Reports Journal pays attention to the Environmental Physics research group

Teresa Serra and Jordi Colomer publish a paper entitled “Functional responses of Daphnia magna to zero-mean flow turbulence” in the Scientific Reports, a prestigious journal from the publishers of Nature. This work has been conducted within the framework of the “Eco-innovative Solutions for Wastewater Treatment and Reuse” research line, and of the INNOQUA European project.

Teresa Serra and Jordi Colomer publish a paper entitled “Functional responses of Daphnia magna to zero-mean flow turbulence” in the Scientific Reports journal.

Scientific Reports is an online, open access journal from the publishers of Nature, and publishes original research in all areas of the natural and clinical sciences.

The members of the Environmental Physics research group have conducted this work within the framework of the “Eco-innovative Solutions for Wastewater Treatment and Reuse” research line.

In this paper, the authors explain that Daphnia are important to understanding the biogeochemistry of aquatic ecosystems, mainly because of their ability to filter bacteria, algae and inorganic particles as well. The authors point out that, although there are many studies on the general effects that biotic and abiotic stressors, increased temperature and hypoxia, salinity, metals, pharmaceuticals, pesticides, etc., have on Daphnia populations, little is known about the impact elevated turbulence has. Here, the authors show that turbulence affects Daphnia magna survival, swimming behavior and filtering capacity. Data from the Environmental Physics research group demonstrate that altering their habitat by induced mixing from turbulence, induces an increased filtering capacity of the Daphnia magna individuals, provided the level of background turbulence (defined by the dissipation of turbulent kinetic energy) is lower than ε = 0.04 cm2 s−3. The filtering capacity reduced exponentially with increasing ε, and at ε > 1 cm2 s−3 both mobility and filtration were suppressed and eventually led to the death of all the Daphnia magna individuals.

This work was supported by the University of Girona funding MPCUdG2016 and by the INNOQUA project from the European Union’s Horizon 2020 research and innovation program (Ares(2016)1770486).

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