南极典型鸟类骨骼中的Ca、P、Sr的含量及Ca/P和Ca/Sr特征  

Concentrations of Ca,P and Sr and characteristics of Ca/P and Ca/Sr in the bones of typical seabirds in the Antarctic

作　　者：徐思琦[1] 王静[1] 程邦波[1] 黄宇营[2] 何伟[2] 谢周清[1] 

机构地区：[1]中国科学技术大学极地环境研究室,安徽合肥230026 [2]中国科学院高能物理研究所,北京100039

出　　处：《中国科学技术大学学报》2007年第8期995-1002,共8页JUSTC

基　　金：国家自然科学基金(40306001);教育部百篇优秀博士论文基金(200354);中国科学院优秀博士论文基金资助

摘　　要：应用同步辐射加速器X荧光技术(SR-XRF)和原子荧光光谱(AFS)对南极雪海燕(Pagodroma nivea)、贼鸥(Catharacta maccormicki)和三种典型企鹅(阿德利企鹅PygoscelisAdeliae、南极企鹅Pygoscelis antarctica、金图企鹅Pygoscelis gentoo)的新鲜翅骨和腿骨以及沉积物中的残骨进行微区扫描和定量分析,并使用AXIL软件对扫描图谱进行解读,获取骨骼中主要元素Ca、P和微量元素Sr的相对含量.元素Ca、P和Sr在骨骼皮质骨不同部位分布不均,Ca/P计数比变异系数为4.7%,Ca/Sr计数比和质量比变异系数都超过了70%.相比其他海鸟,企鹅骨骼中的Sr含量异常偏高,Ca/Sr计数比显著小于其他海鸟骨骼,表明该比值可能是一个识别企鹅和其他海鸟骨骼的替代性指标,并初步探讨了Sr含量异常的原因.Synchrotron radiation X-ray fluorescence （SR-XRF） and atom fluorescence spectrum （AFS） were applied to micro-and quantitative analysis of the fresh bones including wings and legs of petrel （Pagodrorna nivea ）, Jaeger （Catharacta rnaccormicki ） and three kinds of penguin （Adeliae penguin Pygoscelis Adeliae , Antarctica penguin Pygoscelis antarctica, Gentoo penguin Pygoscelis gentoo ）, and relic bones in lake sediments. The relative content of major elements Ca, P and trace element Sr in bones were obtained using AXIL software to resolve the SR-XRF spectrum. The results show that the distributions of Ca, P and Sr in cortical bones are obviously un-uniform. The coefficient of variance （CV） of Ca/P （counts ratio） is approximately 4. 7%, whereas those of Ca/Sr （counts ratio） and Ca/Sr （mass ratio） are both over 70 %. The content of Sr in penguin bones is significantly higher with the Ca/Sr ratio being remarkably low, compared to the those of the other seabirds. Therefore, the ratio of Ca/Sr may be an ideal potential proxy for identifying the bones of penguins and other seabirds. Possible causes of abnormal high levels of Sr in penguin bones were also discussed.

关 键 词：同步辐射加速器X荧光(SR-XRF) 海鸟 骨骼 Ca/Sr Ca/P 南极 

分 类 号：X174[环境科学与工程—环境科学]