使用多代理方法推断牙中的牙科细胞生命史特征 (δ15 N, δ44/42 Ca和微量元素)
Jeremy E Martin1, Théo Tacail2, Laurent Simon3
1Laboratoire de Géologie de Lyon: Terre, Planètes, Environnements, UMR 5276, CNRS, Ecole Normale supérieure de Lyon, Lyon, France.
Rapid communications in mass spectrometry : RCM
|September 12, 2023
概括
海豚牙中的 (Ca) 同位素揭示了早期生命历史事件,如哺乳和断奶. 这种多代理方法克服了研究海洋哺乳动物的传统方法的局限性.
科学领域:
- 海洋哺乳动物生态学
- 古生态学 古生态学
- 生物地质化学生物地质化学
背景情况:
- 了解海洋哺乳动物的生态和保护,需要深入了解它们的生命历史.
- 臭虫牙通过稳定的同位素 (δ15N) 提供了包括哺乳和断奶在内的生命历史的年度记录.
- 历史标本中的原体衰变需要替代代品来进行生命史分析.
研究的目的:
- 为了研究同位素组成 (δ44/42Ca) 作为海洋哺乳动物生命史的代理.
- 为了将δ44/42Ca与δ15N以及海豚牙中的微量金属度相关联.
- 为研究难以捉摸的海洋动物建立新的生态和古生态视角.
主要方法:
- 一种多代理方法分析来自普通海豚 (Tursiops truncatus) 的牙.
- 测量同位素组成 (δ44/42Ca) 与稳定的同位素 (δ15N) 一起测量.
- 激光除分析牙中的微量金属 (Ba,Mg,Sr,Zn) 度.
主要成果:
- 提供了两个odontocete个体的牛奶元素组成和δ44/42Ca值,以帮助解释.
- 在牙上观察到 δ44/42Ca 的变化表明出生,断奶和摄入海水的标记.
- 哺乳期间意外摄入海水导致早期牙中呈阳性 δ44/42Ca 偏移.
结论:
- 提出的多代理方法提供了新的生态和古生态见解.
- 这种方法提高了获取难以获得的海洋哺乳动物生命史参数的能力.
- 为研究海洋哺乳动物种群及其环境提供了新的视角.
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