Benthic and planktonic foraminifera faunal and stable isotopic (δ¹⁸O and δ¹³C) analyses on foraminiferal tests were carried out on a piston core, collected from the Campos Basin slope at a water depth of 1475 m. The core location is in front of Cape São Tomé and exhibits landslide scars features. Benthic foraminifera biofacies with ecological indexes and statistics, lithological facies, biostratigraphy and stable isotopic analysis were used to understand the paleoenvironmental evolution of the region by comparison with modern foraminiferal assemblage. Six biofacies were identified between Marine Isotope Stage (MIS) 7 to MIS 1. The main ecological factors controlling the modern assemblages are: bottom currents, slope stability, oxygen concentration, and nutrient input. However, the last two factors are linked to oceanic processes associated with the Paraíba do Sul river, the influence of which has changed in the past. In particular, Biofacies 3, contains infaunal species, points to dysoxic or anoxic periods in the environment, which are interpreted as periods of increased river influence. Changing environmental conditions were observed as the dominant benthic foraminifera species varied down the core, from Epistominella exigua that thrives in stressful conditions, such as sea level oscillations to Globocassidulina crassa, that prefers mild environments during periods of sea level stability.

底栖和浮游有孔虫动物区系和稳定同位素（δ ¹⁸ O 和 δ ¹³C) 对从坎波斯盆地斜坡水深 1475 m 采集的活塞芯进行了有孔虫测试分析。核心位置位于圣多美角前方，具有滑坡伤痕特征。通过底栖有孔虫生物相的生态指标和统计、岩性相、生物地层学和稳定同位素分析，通过与现代有孔虫组合的比较，了解该地区的古环境演化。在海洋同位素阶段 (MIS) 7 至 MIS 1 之间确定了六个生物相。控制现代组合的主要生态因素是：底部电流、斜坡稳定性、氧浓度和养分输入。然而，最后两个因素与南帕拉伊巴河相关的海洋过程有关，其影响在过去已经发生了变化。特别是，生物相 3 包含动物物种，指出环境中的缺氧或缺氧时期，这被解释为河流影响增加的时期。随着主要底栖有孔虫物种在核心区域的变化，观察到环境条件的变化，从Epistominella exigua在海平面波动等压力条件下繁衍生息，而Globocassidulina crassa在海平面稳定期间更喜欢温和的环境。