Drivers of spatio-temporal patterns of salinity in Spanish rivers: a nationwide assessment.

The salinization of freshwaters is a global water quality problem that leads to the biological degradation of aquatic ecosystems. However, little is known about the spatial extent of freshwater salinization and the relative contribution of each human activity (e.g.

Effects of sewage effluents and seasonal changes on the metabolism of three Atlantic rivers.

Sewage inputs on fluvial ecosystems affect benthic communities and alter trophic networks resulting in changes on river functioning. Functional indicators (e.g.