The main goal of the following proposal is to better comprehend the vertical distribution of living benthic foraminifera in mud-belts at Southwest Atlantic through estimates of redox conditions and food availability in the sediment. This distribution is also unknown in terms of responses of living benthic foraminifera along the sedimentary column, with unprecedented study of the relationship of living foraminifera and redox condition inferred by metals at mud-belts. Estimates of redox conditions in the sediment will be held from geochemical profiled for each element (e.g., V, Cr and Mn) based on its depreciation in the samples, and the availability of food in the sediment will be evaluated by analysis of primary productivity, total organic carbon, total nitrogen and their isotopes in the sediment. The employment of various environmental proxies, both estimates of redox conditions as to the availability of food, is due to a few different limitations and geochemical behavior of these tools. Thus, the data generated will strengthen the understanding of redox conditions, both over a depth gradient as along the sedimentary column, helping to understand living foraminifera responses to the oceanographic processes (e.g., mesoscale features, such as meanders and eddies). It should be noted that the demand on the knowledge of the factors that control the distribution of living benthic foraminifera has increased in recent decades, due in part to the demand for information in the paleoceanographic and paleoclimatic community because the knowledge of the benthic foraminifera ecology is the basis for environmental reconstruction using foraminifera as environmental proxy.
News published in Agência FAPESP Newsletter about the scholarship: