This dataset supports the recent publication "Microplastics increase the marine production of particulate forms of organic matter" by L. Galgani et al (2019) in ERL. It comprises all data presented in the manuscript and Supplementary Information. In the file, Control = mesocosm without plastic addition (1,2,3) and MP = mesocosm with plastic addition (1,2,3). The data proceed from the MESO-Plastic experiment in 2017 conducted at the Hellenic Center for Marine Research, a member of the European Aquacosm network of mesocosm facilities.

The experiment received funding from the European Union's Horizon 2020 Research and Innovation Programme under the Marie Skłodowska-Curie grant agreement No. 702747 - POSEIDOMM, to L. Galgani.

Supplement to: Galgani, Luisa; Tsapakis, Manolis; Tsiola, Anastasia; Tzempelikou, Eleni; Kalantzi, Ionna; Esposito, Chiara; Loiselle, Arturo; Tsotskou, Anastasia; Zivanovic, Snezana; Dafnomili, Eleni; Diliberto, Santi; Mylona, Kyriaki; Magiopoulos, Iordanis; Zeri, Christina; Pitta, Elli; Loiselle, Steven Arthur (2019): Microplastics increase the marine production of particulate forms of organic matter. Environmental Research Letters, 14(12), 124085