Mangrove ecosystems can record biogeochemical and sedimentary signatures in their stratigraphic column. This study examines a mangrove sediment core to evaluate the potential environmental impact of a large-scale port-industrial construction in a tropical lagoonal–estuary near Recife, NE Brazil. Here, we measure sediment accretionrate (SAR), carbon and nitrogen stable isotopes (${\delta }^{13}$C and ${\delta }^{15}$N), total organic matter (TOM), total nitrogen (TN), total organic carbon (TOC), and carbonate content (CaCO ₃) to determine the impact of Suape’s Port-Industrial Complex in the adjacent estuarine system. We identify a high SAR (1.37 cm yr ⁻¹) and propose three main depositional phases in the 82 cm sediment core. The first phase (circa 1956–1973) corresponds to the period prior to the installation of the Suape port complex, where the sediments are characterized by containing sand and organic material derived from terrestrial sources. The second phase (c. 1976–1986) shows signatures that reflect the installation of the Suape port complex and the intensification of the sugarcane monoculture in the catchment area. This phase shows an increase of mud and carbonate content, interpreted as a predominance of marine sediment source due to the morphological changes along the estuary. The third and final phase (c. 1986–2015) contains fluctuating results, reflecting an increase of land use, but not as intense as the period after the installation of the port complex (phase 2). Our results show a biogeochemical and sediment signature shifts directly related to anthropogenic impacts and natural factors. Overall, this study reveals a shift in the sediment sources and composition in the Suape estuarine system as a consequence of human development adjacent to estuarine areas and the resilience of mangrove ecosystems to adapt to anthropogenic impact.

红树林生态系统可以在其地层栏中记录生物地球化学和沉积特征。这项研究检查了红树林沉积物的核心，以评估巴西东北部累西腓附近的一个热带泻湖-河口的大规模港口工业建设对环境的潜在影响。在这里，我们测量沉积物的累积速率（SAR），碳和氮稳定同位素（${\delta }^{13}$C和 ${\delta }^{15}$N），总有机物（TOM），总氮（TN），总有机碳（TOC）和碳酸盐含量（CaCO ₃），以确定Suape港口工业园区对邻近河口系统的影响。我们确定了较高的SAR（1.37 cm yr ^-1）并提出82 cm沉积岩心中的三个主要沉积阶段。第一阶段（大约1956年至1973年）对应于Suape港口综合体安装之前的时期，该时期的沉积物特征是含有来自陆地来源的沙子和有机物质。第二阶段（1976年至1986年）显示的特征反映了Suape港口综合设施的安装以及集水区甘蔗单一栽培的集约化。这一阶段显示出泥浆和碳酸盐含量的增加，这被解释为由于沿河口的形态变化而导致的海洋沉积物来源的增加。第三阶段也是最后阶段（大约1986-2015年）包含波动的结果，反映了土地使用的增加，但是强度不及港口综合设施安装后的阶段（第二阶段）那么强烈。我们的结果表明，生物地球化学和沉积物特征变化与人为影响和自然因素直接相关。总体而言，这项研究揭示了Suape河口系统中沉积物来源和组成的变化，这是由于人类发展与河口区域相邻以及红树林生态系统适应人为影响的复原力的结果。