Anthropogenic factors driven phosphorus contents in Salto Grande Reservoir sediments, São Paulo State (SE Brazil)

Phosphorus is an essential element for life and, when scarce, this macronutrient is a limiting factor for primary production. Phosphorus (P) is a widely used element in the composition of fertilizers, besides being present in large quantities in domestic effluents. Its accumulation in the springs is related to the proliferation of algae and cyanobacteria. In excess, P is a pollutant that contributes greatly to the eutrophication, development of reduced conditions and deterioration of water bodies. In order to understand how the anthropogenic action affected the accumulation of P in the freshwater reservoir of Salto Grande, Americana City (São Paulo State, Brazil), the evaluation of a temporal sedimentary record was carried out. For this purpose, a sediment core collected in the reservoir of Salto Grande was studied. The sediment core recorded the reservoir history since its filling in 1950. The comparison of P concentrations along the core with the population growth curve indicates that the population growth in the surrounding region has had a direct impact on the accumulation of P in the freshwater reservoir of Salto Grande. The eutrophication history of this major continental ecosystem of São Paulo State, was reflected by this sewage-derived from loading of P

The earliest Proto-Gondwana Seaway

The ocurrence of the Late Ediacaran guide fossil Cloudina sp. with other skeletal organisms and trace fossils is herein reported from the basal unit of the Bambui Group (central Brazil).Fil: Warren, Lucas. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Quaglio, Fernanda. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Simoes, Marcelo. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Riccomini, Claudio. Universidade de Sao Paulo; BrasilFil: Poire, Daniel Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; ArgentinaFil: Strikis, Nicolás. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Anelli, Luis E.. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Strikis, Pedro C.. Universidade Estadual Paulista Julio de Mesquita Filho; Brasil4th International Palaentological CongressMendozaArgentinaInternational Palaentological Associatio

The puzzle assembled: Ediacaran guide fossil Cloudina reveals an old proto-Gondwana seaway

During the Ediacaran the Clymene Ocean separated the Laurentia, Amazonia, and Río Apa cratons from several landmasses to the west forming the proto-Gondwana supercontinent. However, no clear evidence about the existence of Ediacaran epeiric seas over those landmasses has been found. Here we report and discuss the discovery of the Ediacaran guide fossil Cloudina sp. associated with other metazoan body and trace fossils in the Bambuí Group (central eastern Brazil). The Ediacaran age of the Bambuí Group and the paleogeographic position of Cloudina-bearing successions in Brazil, Antarctica, Namibia, and Argentina suggest a scenario of ocean connectivity among coeval intracratonic basins of South America, Africa, and Antarctica at the end of Neoproterozoic time. The new finding epitomizes one of the most important paleontological discoveries ever made in South America, helping to solve an old paleogeographic puzzle of the Gondwana supercontinent.Fil: Warren, Lucas V.. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Quaglio, Fernanda. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Riccomini, Claudio. Universidade de Sao Paulo; BrasilFil: Simoes, Marcelo. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Poire, Daniel Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; ArgentinaFil: Strikis, Nicolás. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Anelli, Luis E.. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Strikis, Pedro C.. Universidade Estadual Paulista Julio de Mesquita Filho; Brasi