Triple oxygen isotope composition in Sparidae (sea bream) teeth from archeological layers - a new paleo-environmental proxy for the Mediterranean

考古层中的鲷鱼牙齿中的三重氧同位素组成——地中海的新古环境代表

• 批准号: 278999301
• 负责人: Professor Dr. Andreas Pack
• 金额: --
• 依托单位: Abteilung Isotopengeologie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2015
• 资助国家: 德国
• 起止时间: 2014-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/278999301?language=en
• 关键词: Triple; oxygen; isotope; composition; Sparidae

Marine organisms, such as foraminifera, diatoms, gastropods (vermetid reefs) and coral reefs have provided essential information on past oceans, mainly on temperature, but also on fresh water balance and circulation. However, missing from the literature are proxies, capturing coastal environments, such as coastal wet-lands and lagoons that were exploited by ancient populations. Throughout human history, fishing has been the primary or secondary subsistence systems in coastal settlements, as recognized, by the abundance of fish remains in many archeological sites surrounding the Eastern Mediterranean Sea. Among them, Sparidae (sea-bream) remains are abundant and well-preserved in many well-dated archaeological sites along the coast of Israel, representing the east Mediterranean region. Sparidae are adaptable to different environments, varying from hyper saline lagoons to typical coastal water and brackish environments. Variable d18O values of the Sparidae molariform pharyngeal teeth recently studied indicate different salinities of past coastal water. In the current proposal, we suggest to enlarge the preliminary research by studying triple oxygen stable isotope d17O_PO4 and d18O_PO4 of ancient Sparidae teeth as proxies of Eastern Mediterranean coastal water temperature and salinity. In order to be fully applicable, the method requires studying the fractionation of d17O_PO4 and d18O_PO4 during the deposition of modern teeth with its surrounding environment. With these results we will investigate teeth from selected well-dated coastal horizons in Israel and the eastern Mediterranean, where a wealth of Sparidae remains are available for new high-resolution paleo-environmental reconstructions.

海洋生物，例如有孔虫，硅藻，腹足动物（Vermetid Reefs）和珊瑚礁，已经提供了有关过去海洋的基本信息，主要是关于温度，但也提供了淡水平衡和循环。然而，文献中缺少的是代理，捕捉沿海环境，例如沿海湿地和泻湖，这些环境被古代人口所利用。在整个人类历史上，捕鱼一直是沿海定居点的主要或次要生存系统，因为在地中海东部的许多考古遗址中，鱼类仍然存在丰富。其中，在以色列沿海的许多良好的考古遗址中，Sparidae（海龙）残留物丰富且保存完好，代表东地中海地区。 Sparidae适用于不同的环境，从盐水泻湖到典型的沿海水和微咸环境不等。 Sparidae Molariform咽牙的可变D18O值最近研究表明过去的沿海水的盐度不同。在当前的建议中，我们建议通过研究古代Sparidae牙齿的三重氧稳定同位素D17O_PO4和D18O_PO4来扩大初步研究，作为东地中海沿海水温和盐分的代理。为了完全适用，该方法需要研究在现代牙齿及其周围环境的现代牙齿沉积过程中D17O_PO4和D18O_PO4的分馏。通过这些结果，我们将调查以色列和地中海东部选定良好的沿海地平线的牙齿，那里有大量的Sparidae遗骸可用于新的高分辨率高分辨率古环境重建。