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，如有孔虫、硅藻、腹足类（蚓类礁）和珊瑚礁，提供了关于过去海洋的重要信息，主要是关于温度，但也关于淡水平衡和循环。然而，文献中缺少的是代用物，即捕获沿海环境的代用物，如沿海湿地和古代人口开发的泻湖。纵观人类历史，渔业一直是沿海定居点的主要或次要生计系统，这一点在东地中海周围的许多考古遗址中发现了丰富的鱼类遗迹。其中，在以色列沿岸的许多年代久远的考古遗址中，有大量保存完好的鲷科（海鲷）遗骸，代表了东地中海地区。Sparidae适应不同的环境，从高盐泻湖到典型的沿海水域和微咸环境。最近研究的磨牙Sparidae molariform咽齿的可变d18O值表明过去沿海水域的不同盐度。在目前的建议中，我们建议通过研究古Sparidae牙齿的三氧稳定同位素d17O_PO4和d18O_PO4作为东地中海沿岸水温和盐度的代表来扩大初步研究。为了使该方法完全适用，需要研究现代牙齿沉积过程中d17O_PO4和d18O_PO4与周围环境的分馏关系。有了这些结果，我们将研究以色列和地中海东部选定的年代确定的沿海地平线上的牙齿，那里有丰富的Sparidae遗骸可用于新的高分辨率古环境重建。