Establishment of ecosystem monitoring method using a stable isotope ratios of eggshells of birds flying to the brackish lake

在本研究中，测量蛋壳碳酸盐的碳同位素氧，即使由于质谱仪的老化而没有得到可靠的测量结果，在粉末状蛋壳碳酸盐的状态下留到将来也被保存了下来。然而，我们已经提出了对样品处理的方法.对贝壳的结构和厚度进行了种属特征观察。一些物种可以在这个特征中识别。用蛋壳碳酸盐粉末进行同位素分析，在CNS元素分析仪上测定总有机碳、总氮、总硫含量。此外，我们计算了TOC/TN比从这些值。此外，还对某些元素进行了X射线荧光元素分析。有效的常量元素为Na、Mg和Ca。这些工具是种间差异，但是，通过结合所有因素观察到种间差异。因此，也可以从这些分析中鉴定蛋壳的种类，这些种类可以通过仅取样碎片在一定程度上鉴定。这将是值得的，开辟了作为一种监测工具的可能性，将继续进一步研究。

In this study, the measurement of carbon isotope oxygen of eggshell carbonate, even if it has not been obtained reliable measurement due to the aging of the mass spectrometer, in a state powdered eggshell carbonate for leave to future has been saved. However, we have proposed to on the method of sample processing. Structure and thickness of the shell is characterized by species were observed. Some species can be identified in this character. Total organic carbon, total nitrogen, total sulfur content were measured in the CNS elemental analyzer using the powder of eggshell carbonate for isotope analysis. In addition, we calculated the TOC/TN ratio from these values. In addition, the XRF elemental analysis was measured about some element. That are valid in the major element, the element was Na, Mg and Ca. These tool are differences by species, but, species differences were observed by combining all factor. Therefore, it is also possible to identify the species of eggshell from these analyzes, which species can be identified to some extent by sampling only fragments. This will be worth that opens up the possibility of as a monitoring tool, will continue to research further.