低氧特征印记在耳石 δ 13 C 中,从个体到全球范围内
Evan M Howard1,2, Curtis A Deutsch3,4
1Department of Geosciences, Princeton University, Princeton, NJ, 08540, USA. ehoward2@uw.edu.
Scientific reports
|January 2, 2025
概括
海洋生态热体的海洋生态热体.
科学领域:
- 生态生理学 生态生理学
- 生物地质化学生物地质化学
- 古海洋学是古海洋学.
背景情况:
- 低氧耐受性是海洋赤热生物的一个关键生态生理特征,受温度,活动和体质的影响.
- 气候变化通过低氧耐受度的变化影响海洋外热生物.
- 对于大多数海洋物种来说,对低氧耐受性的实验数据很少.
研究的目的:
- 机械地将鱼类的低氧耐受性与耳石中的碳同位素 (δ13Coto) 联系起来.
- 开发一个模型,从石地质化学中预测缺氧耐受性和地理范围的极限.
- 重建水生物种过去和现在的有氧息地变化.
主要方法:
- 利用动物组织中碳和氧同位素的代谢合.
- 开发一种模型,将石碳同位素 (δ13Coto) 与低氧耐受性联系起来.
- 分析 δ13Coto 与温度和海洋生物群相关的全球模式.
主要成果:
- 该模型准确地在各种尺度上复制了δ13Coto的经验模式.
- 奥托利特碳同位素对体型的依赖性很弱,对温度的依赖性很强,非线性.
- 全球 δ13 周边温度关系反映了阿拉戈尼特沉和生物群特定的缺氧特征.
结论:
- 奥托利特碳同位素 (δ13Coto) 作为海洋生态热生物中低氧耐受性的代理物.
- 该模型可以使用鱼的耳骨石化学来预测有氧范围的极限.
- 石地质化学为重建水生物种的有氧息地和古海洋学变化提供了强大的工具.
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