Le réchauffement climatique est aujourd’hui une problématique d’imp...

Research on Foraminifera and Radiolaria has predominantly focused on their fossil remains. This synthesis identifies the “Big Five” disciplines of a unified Retaria research: diversity and evolution,...

Abstract. The Indian Ocean plays a critical role in the global climate system by regulating heat and moisture transport, influencing major fluxes that drive atmospheric circulation. Individual foramin...

This study aimed to characterise the Cachoeira River Estuary (CRE) in Bahia, Brazil, using living (L) and dead (D) foraminiferal as bioindicators, focusing on the identification of environmental quality and anthropogenic impacts. Seventy-six species of foraminifera were identified, with the highest species richness and density found in the lower and middle estuary. Twenty species occurred only in the L assemblage and 26 species only in the D assemblage. The most abundant species in both assemblages were Paratrochammina clossi, Ammonia tepida morphospecies, and Elphidium excavatum. Four distinct regions were recognised based on the distribution of L and D foraminifera and sedimentological parameters. Region I represents the estuary mouth with the most active hydrodynamic conditions, represented mainly by Bolivina striatula (L and D); region II represents the confluence of the tributary rivers and is characterised by A. tepida and P. clossi (L and D); region III in the middle estuary area is represented by Quinqueloculina seminulum (L) and P. clossi (L and D); region IV represents the beginning of the upper estuary and is mainly represented by Trochammina inflata (L and D). Region IV receives more freshwater but is still influenced by the tides, which allow the significant presence of Q. seminulum (D) and P. clossi (D). The present study was efficient in the environmental characterisation and can be used as a baseline to understand natural or anthropogenic impacts in this ecosystem, as well as to improve sea level models in tropical mesotidal estuaries.

With so little money to go round, the costs of competing for grants can exceed what the grants are worth. When that happens, nobody wins.