Oceans and Seas, Temperature, Phytoplankton - genetics, Species Specificity, RNA, Ribosomal, 18S - genetics, Seawater - chemistry, Biomass, Carbon Dioxide - analysis, Phytoplankton - cytology, Global Warming, Flow Cytometry, Sequence Analysis, RNA, Body Size - physiology, Phytoplankton - physiology, Germany, Microscopy, Fluorescence, Hydrogen-Ion Concentrati...