Abstract：
Mangroves act as buffer areas for marine systems, providing a barrier to contamination from continental sources by retaining metal pollutants. This study evaluates metal and semimetal contamination in the water column and sediments of four mangroves located on the volcanic island of São Tomé. Several metals had a widespread distribution, with occasional high concentrations, linked to potential sources of contamination. However, the two smaller mangroves, located in the northern part of the island, tended to have high metal concentrations. Arsenic and chromium concentrations were notably concerning, particularly if we consider this is an isolated and non-industrialized island. This work highlights the need for further assessments and a better understanding of processes and implications of metal contamination in mangroves. This assumes a particular relevance in areas that have specific geochemical compositions (i.e., volcanic origin) and in developing countries, where people often rely directly and heavily on resources obtained from these ecosystems.
摘要：
红树林作为海洋系统的缓冲区，通过保留金属污染物，为来自大陆的污染提供屏障。这项研究评估了位于圣多美火山岛上的四个红树林的水柱和沉积物中的金属和半金属污染。几种金属分布广泛，偶尔会有高浓度，与潜在的污染源有关。然而,两个较小的红树林，位于该岛北部，往往有较高的金属浓度。砷和铬的浓度值得注意，特别是如果我们认为这是一个孤立的非工业化岛屿。这项工作强调需要进一步评估，并更好地了解红树林中金属污染的过程和影响。这假设在具有特定地球化学组成的地区具有特别的相关性(即，火山起源)和发展中国家，人们经常直接和严重依赖从这些生态系统中获得的资源。
