Warming and Ocean Acidification Effects on Phytoplankton—From Species Shifts to Size Shifts within Species in a Mesocosm Experiment Sommer, Ulrich ; Paul, Carolin ; Moustaka-Gouni, Maria Abstract Publication: PLoS ONE Pub Date: May 2015 DOI: 10.1371/journal.pone.0125239 Bibcode: 2015PLoSO..1025239S