期刊
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
卷 206, 期 3-4, 页码 203-216出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.palaeo.2004.01.004
关键词
carbon isotopes; bone; carbonate; diet; respiration; turtles
Analyses of sequential growth layers of marine turtle humeri indicate that diet is the primary influence on the carbon isotopic composition of sea turtle bone carbonate. However, secondary physiological and geographical factors, such as foraging locality, migratory range, physiological interactions with ocean water, and especially respiratory physiology, also influence carbon isotope values of biogenic structural carbonate. The difference in carbon isotope compositions between diet and bone structural carbonate is consistently smaller in the deep-diving leatherback (Dermochelys coriacea) and olive ridley (Lepidochelys olivacea) turtles than in the shallow-diving green turtle (Chelonia mydas). Although diet has considerable influence on sea turtle bone carbonate delta(13)C, respiration appears to be an additional influence, because of the accumulation of respired CO, in blood during extended breath-hold diving and the concomitant incorporation of blood-CO2 into bone carbonate. Preliminary analyses of collagen and muscle tissue do not show evidence of respiratory effects on their carbon isotope compositions. (C) 2004 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据