Wastewater discharge with phytoplankton may favor cyanobacterial development in the main drinking water supply river in Uruguay

Unravelling the effects of treated wastewater discharges on the water quality in a coastal lagoon system (Ria Formosa, South Portugal): Relevance of hydrodynamic conditions

“…In fact, a strong increasing trend in the abundance of freshwater chlorophytes, specifically Scenedesmus, and cyanobacteria negatively correlated with salinity, was detected at these stations. Cyanobacteria and chlorophytes are usually considered well adapted to high organic load conditions and low oxygen (Palmer, 1969), and chlorophytes have been reported as relevant taxa in wastewater stabilization ponds and receiving coastal areas (Soler Torres and Del Rio, 1995;Amengual-Morro et al, 2012;Ouali et al, 2015;Leruste et al, 2016;De-los-Ríos-Mérida et al, 2017;Olano et al, 2019). Additionally, the genera Scenedesmus and Navicula were also classified in the top eight more tolerant genera to organic pollution (Palmer, 1969).…”

Floración excepcional de cianobacterias tóxicas en la costa de Uruguay, verano 2019

“…Estudios puntuales realizados en distintos períodos entre 2003 y 2012 en Canelones (arroyos Solís Grande, Solís Chico y Pando) no mostraron la presencia de floraciones o de cianobacterias (A. Acuña, comunicación personal; L. Rodríguez-Graña, comunicación personal). Finalmente, el río Santa Lucía (Montevideo), uno de los principales tributarios de la zona costera, presenta una taxocenosis fitoplanctónica caracterizada por una baja proporción de cianobacterias, conformadas principalmente por organismos filamentosos (Bonilla, et al, 2015;Aubriot, et al, 2017;Olano, et al, 2019). Este conjunto de información no respalda la hipótesis sobre los tributarios menores como aportes a las floraciones costeras.…”

High-proportions of tailwater discharge alter microbial community composition and assembly in receiving sediments

“…After entering the receiving water body, the pollutants in the tailwater are not easily degraded and utilized by microorganisms but are easily enriched in aquatic organisms, entering the food chain and further affecting human health 3 . Research on the distribution and risk of nutrients and trace pollutants in lakes and rivers receiving tailwater discharge has received widespread attention; however, little is known about the ecological effects of tailwater discharge on aquatic organisms, especially microorganisms, in sediments in arid regions 4 , 5 .…”