Taphonomic aspects of recent benthic foraminiferal assemblages, North Coast of the Sate of Bahia, Brazil

IF 1.7 4区地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY

Journal of South American Earth Sciences Pub Date : 2024-11-07 DOI:10.1016/j.jsames.2024.105239

André Ramos Costa , Zelinda Margarida Andrade Nery Leão , Altair de Jesus Machado , Isabel Honorata de Souza Azevedo , Gabriela Santiago Mercês Pereira , Marlene Campos Peso-Aguiar , Simone Souza de Moraes

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Abstract

This research focuses on the analysis of benthic foraminiferal assemblages in surface sediment samples from the seafloor, collected on the continental shelf adjacent to Arembepe Beach within the municipality of Camaçari, on the North Coast of the State of Bahia (Brazil). An industrial submarine outfall significantly influences this area. This study showcases the results of the spatio-temporal distribution of foraminiferal assemblages, their ecological characteristics, and the taphonomy of the foraminifera tests, relating them to the environmental sedimentary processes in the area. The benthic macroforaminifera-carrying symbionts dominate; they are indicative of shallow environments and are in line with the ecological needs of the fauna typical of warm and shallow tropical waters. The persistent spatio-temporal patterns suggest that despite moderate to high hydrodynamic energy, which is expected in shallow tropical shelf environments, it does not considerably impact the distribution of the foraminiferal assemblages. This reflects the uniformity in the faunal composition and the clear temporal continuity observed.

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巴西巴伊亚州北海岸近代底栖有孔虫集合体的堆积学问题

这项研究的重点是分析海底表层沉积物样本中的底栖有孔虫组合，这些样本采集于巴西巴伊亚州北海岸卡马萨里市 Arembepe 海滩附近的大陆架上。一个工业海底排污口对这一地区产生了重大影响。本研究展示了有孔虫集合体的时空分布、生态特征和有孔虫的岩石学测试结果，并将它们与该地区的环境沉积过程联系起来。底栖大型有孔虫以携带共生体为主；这些共生体显示了浅海环境的特征，符合典型的温暖和浅热带水域动物群的生态需求。持续的时空模式表明，尽管热带浅海陆架环境中的水动力能量处于中等水平到较高水平，但并没有对有孔虫群的分布产生重大影响。这反映了所观察到的动物群组成的一致性和明显的时间连续性。

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来源期刊

Journal of South American Earth Sciences 地学-地球科学综合

CiteScore

3.70

自引率

22.20%

发文量

364

审稿时长

6-12 weeks

期刊介绍： Papers must have a regional appeal and should present work of more than local significance. Research papers dealing with the regional geology of South American cratons and mobile belts, within the following research fields: -Economic geology, metallogenesis and hydrocarbon genesis and reservoirs. -Geophysics, geochemistry, volcanology, igneous and metamorphic petrology. -Tectonics, neo- and seismotectonics and geodynamic modeling. -Geomorphology, geological hazards, environmental geology, climate change in America and Antarctica, and soil research. -Stratigraphy, sedimentology, structure and basin evolution. -Paleontology, paleoecology, paleoclimatology and Quaternary geology. New developments in already established regional projects and new initiatives dealing with the geology of the continent will be summarized and presented on a regular basis. Short notes, discussions, book reviews and conference and workshop reports will also be included when relevant.