Sedimentary ancient DNA from caves: Challenges and opportunities

IF 1.9 3区 地球科学 Q3 GEOGRAPHY, PHYSICAL
Siobhan Evans, Bastien Llamas, Jamie R. Wood
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Abstract

Caves are unique depositional environments that hold great potential for long-term preservation of DNA due to their typically cool and stable internal climates, buffered from external climate extremes. Bones from caves have long been recognised as an excellent source of ancient DNA, yet the potential for DNA preservation in cave sediments themselves has only recently begun to be explored. Here, we discuss features of caves that make them well-suited to the long-term preservation of sedimentary ancient DNA (sedaDNA), focussing specifically on sources, taphonomy and preservation of cave sedaDNA. We also highlight opportunities for future work to improve our understanding of the processes influencing long-term DNA preservation within cave sediments. These recommendations seek to improve our understanding of sedimentary ancient DNA taphonomy within caves and enhance the level of insights about the past that can be gained from it and include: (1) designation of reference sections and sample repositories; (2) routine collection of sediment, mineralogy and geochemistry data; (3) routine collection of cave climate data; (4) increased application of microstratigraphic and spatial analyses; (5) advocating use of multiple proxies when interpreting results and (6) ensuring ethical best practices are followed.

来自洞穴的沉积古DNA:挑战与机遇
洞穴是独特的沉积环境,由于其典型的凉爽和稳定的内部气候,缓冲了外部极端气候,因此具有长期保存DNA的巨大潜力。长期以来,洞穴中的骨头一直被认为是古代DNA的绝佳来源,然而,在洞穴沉积物中保存DNA的潜力直到最近才开始被探索。本文讨论了适合沉积古DNA (sedaDNA)长期保存的洞穴特征,重点讨论了洞穴sedaDNA的来源、埋藏学和保存。我们还强调了未来工作的机会,以提高我们对洞穴沉积物中影响长期DNA保存的过程的理解。这些建议旨在提高我们对洞穴内沉积古代DNA埋藏学的理解,并提高对过去的认识水平,其中包括:(1)指定参考剖面和样本库;(2)沉积物、矿物学和地球化学资料的常规收集;(3)洞穴气候资料的常规采集;(4)微地层和空间分析的应用增加;(5)提倡在解释结果时使用多个代理;(6)确保遵循道德最佳实践。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Quaternary Science
Journal of Quaternary Science 地学-地球科学综合
CiteScore
4.70
自引率
8.70%
发文量
82
审稿时长
6-12 weeks
期刊介绍: The Journal of Quaternary Science publishes original papers on any field of Quaternary research, and aims to promote a wider appreciation and deeper understanding of the earth''s history during the last 2.58 million years. Papers from a wide range of disciplines appear in JQS including, for example, Archaeology, Botany, Climatology, Geochemistry, Geochronology, Geology, Geomorphology, Geophysics, Glaciology, Limnology, Oceanography, Palaeoceanography, Palaeoclimatology, Palaeoecology, Palaeontology, Soil Science and Zoology. The journal particularly welcomes papers reporting the results of interdisciplinary or multidisciplinary research which are of wide international interest to Quaternary scientists. Short communications and correspondence relating to views and information contained in JQS may also be considered for publication.
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