...
首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >A stable isotope aridity index for terrestrial environments
【24h】

A stable isotope aridity index for terrestrial environments

机译:用于陆地环境的稳定同位素干旱指数

获取原文
获取原文并翻译 | 示例
           

摘要

We use the oxygen isotopic composition of tooth enamel from multiple mammalian taxa across eastern Africa to present a proxy for aridity. Here we report tooth enamel delta O-18 values of 14 species from 18 locations and classify them according to their isotopic sensitivity to environmental aridity. The species are placed into two groups, evaporation sensitive (ES) and evaporation insensitive (EI). Tooth enamel delta O-18 values of ES animals increase with aridity, whereas the tooth enamel delta O-18 values of EI animals track local meteoric water delta O-18 values, demonstrating that bioapatite delta O-18 values of animals with different behaviors and physiologies record different aspects of the same environment. The enrichment between tooth enamel delta O-18 values of ES and El animals records the degree of O-18 enrichment between evaporated water (ingested water or body water) and source water, which increases with environmental aridity. Recognition of the ES-EI distinction creates the opportunity to use the O-18 composition of bioapatite as an index of terrestrial aridity.
机译:我们使用来自整个非洲东部多个哺乳动物分类群的牙齿珐琅质的氧同位素组成,提出了干旱的替代物。在这里,我们报告了18个位置的14种物种的牙釉质δO-18值,并根据其对环境干旱的同位素敏感性对其进行了分类。将该物种分为两组,蒸发敏感型(ES)和蒸发不敏感型(EI)。 ES动物的牙釉质三角洲O-18值随干旱而增加,而EI动物的牙釉质三角洲O-18值跟踪局部的流水水三角洲O-18值,表明具有不同行为和不同行为的动物的生物磷灰石三角洲O-18值。生理记录相同环境的不同方面。 ES和El动物的牙釉质δO-18值之间的富集记录了蒸发水(食用水或人体水)和源水之间的O-18富集程度,随环境干旱程度增加。认识到ES-EI的区别为有机磷灰石的O-18组成作为陆地干旱指数提供了机会。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号