In the current study, we investigated the direct effects of independent and combined acidification and warming on periphyton and their indirect effects through invertebrate grazing.This dataset is included in the OA-ICC data compilation maintained in the framework of the IAEA Ocean Acidification International Coordination Centre (see https://oa-icc.ipsl.fr). Original data were provided by the author of the related paper (see Related to) to the OA-ICC data curator. In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2024) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation by seacarb is 2024-09-30.

Values for nutrients, except ammonium Experiment 1, from the four reservoir tanks were pooled since there were no significant differences in values based on t-test between acidified and non-acidified reservoir tanks. Values for ammonium in Experiment 1 were separated between acidified and non-acidified treatments.