Mesozooplankton community models selection.

Generalized Additive Mixed Models (GAMMs) for the mesozooplankton community: a) α + f, no difference between treatments (Model Trtmt_indep), b) α + fT, pCO2 treatment effect on temporal trends but not in abundance (Model Trtmt_trend), c) αT + f, pCO2 treatment effect on absolute abundance but not on temporal trends (Model Trtmt_absAb) and d) αT + fT, treatment causes differences both in absolute abundance and seasonal trends (Model Trtmt_absAb_trend). Only those species that were present in at least one of the mesocosms more than 9 days (2/3 of the number of days sampled) and only convergent models were used for this analyses. The smoother of all selected models had a p-value < 0.05. For each species, the model with the lowest AIC (boldface) was considered to better represent the temporal trend during the experiment. Hyphens (-) indicate non-convergent models.