过去的棕树:形态测量植物石分析能否为Arecaceae的深度时间进化和古生态学提供信息?
W H Brightly1,2,3, C Crifò4, T J Gallaher5
1Department of Biology, University of Washington, Seattle, WA 98195, USA.
Annals of botany
|April 30, 2024
概括
棕植物石为古代气候研究提供有限的分类分辨率. 虽然可以将棕树与其他植物区分开来,但它们与环境偏好有很弱的相关性,这限制了可靠的古老环境推断.
科学领域:
- 古植物学是古植物学.
- 古生态学 古生态学
- 生物地质化学生物地质化学
背景情况:
- 棕化石是过去温暖潮湿气候的关键指标.
- 现代棕树表现出多样化的气候耐受性,仅仅从化石中复杂化了古老环境的解释.
- 棕植物石 (微观的体) 提供了因其保存而具有识别古代棕社区的潜力.
研究的目的:
- 评估棕植物体的分类学和古老环境效用.
- 为了评估植物石形态学在识别棕树枝的准确性.
- 为了改善古老环境重建,将植物石形态与物种的气候偏好联系起来.
主要方法:
- 在包括棕树在内的97种现代单物种中量化了植物石形态.
- 使用植物石数据测试了五种辨别方法来识别使用植物石数据的九种主要棕树种.
- 采用了植物遗传学比较分析,将植物石形态与气候偏好联系起来,并重建了化石棕社区.
主要成果:
- 植物石的鉴定到分类水平只达到59%的准确性.
- 棕树通常可以从非棕树中区分开来,但很少有棕树叶表现出明显的植物体形态.
- 植物石形态与物种的环境偏好有很弱的相关性,导致古老环境重建的不确定性很高.
结论:
- 棕植物体形态提供了一些分类学区别,但需要谨慎的解释深度时间古老环境研究.
- 广泛的地理和遗传学分析表明,使用植物石区分最古老的棕树种群的可靠性有限.
- 尽管有局限性,但棕植物石可以揭示不同的分类,对古老环境洞察有潜在的帮助.
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