Stable isotope signatures of geologic, atmospheric, and hydrologic sources are transferred to the ecosystem through the food chain. The present study used Sr isotope data of soil and plant samples collected from Jeju Island to explore the roles of these sources in the local bioavailable Sr pool. X-ray diffraction and Sr isotope data revealed that the soil materials came from diverse sources such as weathered volcanic bedrock, marine carbonate sediments, and allochthonous aeolian dust. Dilute (1 M) ammonium nitrate- and acetic acid-leachates of the soil samples yielded ⁸⁷Sr/⁸⁶Sr ratios between 0.7047 and 0.7092, which were slightly but discernably higher than ratios for Jeju volcanic rocks reported in the literature (0.7045 ± 0.0004). This indicates that relatively more radiogenic Sr, probably in carbonate and aeolian dust, was preferentially released to the leachates. Geopedological control over the bioavailable Sr pool was demonstrated by the positive ⁸⁷Sr/⁸⁶Sr correlation between leachable soil fractions and the corresponding plant samples. The enhanced ⁸⁷Sr/⁸⁶Sr ratios of plants (0.7062–0.7092, average = 0.7077 ± 0.0012) reflect the influence of seawater. These Sr isotope data provide a scientific basis for addressing archaeological and historical questions related to Jeju Island.

地质，大气和水文资源的稳定同位素特征通过食物链转移到生态系统。本研究使用从济州岛收集的土壤和植物样品的Sr同位素数据来探索这些来源在当地生物利用Sr库中的作用。X射线衍射和Sr同位素数据表明，土壤材料来自各种来源，例如风化的火山岩基岩，海洋碳酸盐沉积物和异源风尘。稀释（1 M）土壤样品中的硝酸铵和乙酸浸出液可得到⁸⁷ Sr / ⁸⁶Sr比值在0.7047和0.7092之间，比文献中报道的济州火山岩的比值稍高但明显（0.7045±0.0004）。这表明可能在碳酸盐和风尘中的放射性较高的Sr优先释放到渗滤液中。可浸出土壤组分与相应植物样品之间⁸⁷ Sr / ⁸⁶ Sr正相关证明了生物可利用Sr库的地理学控制。植物增加的⁸⁷ Sr / ⁸⁶ Sr比率（0.7062-0.7092，平均值= 0.7077±0.0012）反映了海水的影响。这些锶同位素数据为解决与济州岛有关的考古和历史问题提供了科学依据。