13C,15N和34S同位素值来自保存的弹性支链下巴:从现有收藏中对生态研究的影响
Laura Holmes1, Charlie Huveneers1, Vincent Raoult2
1Southern Shark Ecology Group, College of Science and Engineering, Flinders University, Adelaide, Australia.
Marine environmental research
|March 20, 2025
概括
弹性支链下巴的化学处理不会影响牙稳定的同位素 (碳,,硫). 这一发现证实了使用博物馆标本进行捕食者食和饮食的生态研究的有效性.
科学领域:
- * 生物地质化学
- * 海洋生态学 海洋生态学
- * 同位素分析
背景情况:
- *稳定同位素分析对于理解海洋生态系统中的捕食者-猎物动态和食生态学至关重要.
- * Elasmobranch (鱼和鱼) 牙同位素提供了对个体热量变化的洞察力.
- * 博物馆和私人收藏中含有有价值的弹性支链下巴样本,但用于保存的化学处理可能会影响同位素完整性.
研究的目的:
- * 评估化学保存方法对碳 (δ13C), (δ15N) 和硫 (δ34S) 稳定同位素值在弹性牙中的影响.
- * 确定牙准备 (酸性消化) 和不同的保存技术 (乙醇,漂白剂,过氧化) 是否会改变同位素特征.
- *为了验证化学处理的弹性枝状样本从收集用于生态研究的使用.
主要方法:
- *比较稳定同位素 (δ15N, δ13C, δ34S) 的价值,从干燥的下巴,而不是那些保存在乙醇,漂白剂,或过氧化.
- * 化学处理后评估牙消化能力.
- *研究了三种具有不同牙形态的物种的影响:牛鼻鱼,皮鱼和宽鼻七鱼.
主要成果:
- * 保存方法 (乙醇,漂白剂,过氧化) 和酸消化对牙消化能力没有显著影响.
- *稳定同位素值 (δ15N, δ13C, δ34S) 在所有测试的保存治疗和牙类型中保持一致.
- *在任何研究的弹性枝条物种中,没有观察到对同位素完整性保存的明显影响.
结论:
- *通常用于保护弹性支骨的化学处理不会损害牙中碳,和硫稳定同位素的完整性.
- * 博物馆和私人持有的弹性支链标本,即使是经过化学处理的样本,也是稳定同位素分析的可靠来源.
- * 这项研究支持在生态学研究中扩大使用历史性弹性枝条集合,增强我们对海洋食物网和食物网生态学的理解.
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