Declining calcium concentrations drives shifts toward smaller and less nutritious zooplankton in northern lakes

These data were generated to investigate important determinants of the relative abundance of most dominant zooplankton groups in Fennoscandian (Sweden and Finland) lakes. The data were build using archives of temperature, water chemistry and zooplankton data from 60 Scandinavian lakes that represent broad spatial and temporal gradients in key parameters: temperature, calcium (Ca), total phosphorus (TP), total organic carbon (TOC), and pH. The results of the study are presented in paaper titled "Declining calcium concentrations drives shifts toward smaller and less nutritious zooplankton in northern lakes" in Global Change Biology journal.