This report (dubbed ‘Suisun Synthesis II’) was prepared to serve as a background resource for a November 2016 workshop, co-convened by the Central Valley and San Francisco Bay Area Regional Water Quality Control Boards, that focused on the potential influence of excess nutrients (in particular ammonium) on phytoplankton production and community composition in the nSFE. This report aimed to gather a diverse set of technical perspectives on this topic under one cover, and consists of 5 technical sections written by different groups of authors. It serves a a companion to an earlier report focused primarily on the ‘Ammonium Paradox.’