Chlorophyll a, nutrients and phytoplanktonic community in a continental ecosystem highly influenced by marine waters

► The Júcar River is characterized by a very irregular flow. ► The flow at its mouth is usually insignificant except during intense rainy periods. ► The presence or absence of freshwater generates two different scenarios. ► With freshwater flow there are vertical gradients of salinity and nutrients. ► The river inputs change phytoplankton composition and abundance along water column.