Institute of Hydrobiology 1 article published in JoVE Environment A Low-Cost Method of Measuring the In Situ Primary Productivity of Periphyton Communities of Lentic Waters Kateřina Čapková1,3, Tomáš Bešta1, Jan Mareš1,2, Petr Čapek2, Klára Řeháková1,3 1Biology Centre of the CAS, Institute of Hydrobiology, 2Faculty of Science, University of South Bohemia, 3Institute of Botany AS CR Presented here is a cost-effective and transportable method/facility for measuring the primary productivity of microbial mats under actual in situ environmental temperature and light conditions. The experimental setup is based on widely available materials and can be used under various conditions while offering the advantages of laboratory-based models.