关键词: 企鹅;贼鸥;骨骼;稀土元素

Abstract:

Rare earth elements(REE) in the bone tissues of penguins and skuas from Great Wall Station and Zhongshan Station in the Antarctic were determined using an inductively coupled plasma mass spectrometer(ICP-MS).The result shows that the total REE contents in seabirds of Antarctic vary from 0.8μg/g to 3.5μg/g.Enrichment of LREE in the seabirds′ bones suggests that there is some fractionation between LREE and HREE.There are obvious differences in species and regions between penguins and skuas,and the REE contents in the seabirds of Great Wall Station are more than the ones in Zhongshan Station.The diversity also exits in the different bone tissues of the seabirds,and the contents in the leg bone are approximately two times higher than the ones in the wing bone.The REE distribution patterns of the bone tissues in the seabirds show relatively enrichment in LREE,the slope of which shows negative,while HREE keeps stable.There are differences in the REE distribution patterns between penguins and skuas,which relate to the food chain and physiological mechanism rather than the seawater.