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

有孔虫、硅藻、腹足类(Vermetid礁)和珊瑚礁等海洋生物提供了关于过去海洋的基本信息，主要是关于温度的信息，但也提供了关于淡水平衡和循环的信息。然而，文献中缺少的是代表，捕捉沿海环境，如被古代人口开发的沿海湿地和泻湖。纵观人类历史，渔业一直是沿海住区的主要或次要生存系统，东地中海周围的许多考古遗址中发现了丰富的鱼类遗骸，这一点得到了确认。其中，代表东地中海地区的以色列海岸沿线多处考古遗址保存完好，保存完好，出土的金枪鱼遗骸十分丰富。琵琶科适应不同的环境，从高盐度的泻湖到典型的沿海水域和微咸水环境。最近研究的琵琶科磨牙状咽齿的可变d18O值表明，过去沿海水域的盐度不同。在目前的建议中，我们建议扩大初步研究，研究古代琵琶科牙齿的三重氧稳定同位素d17OPO4和d18OPO4，作为东地中海沿岸水温和盐度的替代指标。为了完全适用，需要研究现代牙齿沉积过程中d17O_PO4和d18O_PO4及其周围环境的分馏。根据这些结果，我们将对以色列和地中海东部选定的年代准确的海岸地平线上的牙齿进行调查，那里有丰富的琵琶科遗骸可用于新的高分辨率古环境重建。

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.