PDF(Pubmed)
Abstract：
Paleo-archives are essential for our understanding of species responses to climate warming, yet such archives are extremely rare in the Arctic. Here, we combine morphological analyses and bulk-bone metabarcoding to investigate a unique chronology of bone deposits sealed in the high-latitude Storsteinhola cave system (68°50\' N 16°22\' E) in Norway. This deposit dates to a period of climate warming from the end of the Late Glacial [~13 thousand calibrated years before the present (ka cal B.P.)] to the Holocene thermal maximum (~5.6 ka cal B.P.). Paleogenetic analyses allow us to exploit the 1000s of morphologically unidentifiable bone fragments resulting in a high-resolution sequence with 40 different taxa, including species not previously found here. Our record reveals borealization in both the marine and terrestrial environments above the Arctic Circle as a naturally recurring phenomenon in past periods of warming, providing fundamental insights into the ecosystem-wide responses that are ongoing today.
摘要：
古档案对于我们了解物种对气候变暖的反应至关重要，然而，这样的档案在北极极为罕见。这里,我们结合了形态学分析和骨块骨编码，以研究挪威高纬度Storsteinhola洞穴系统（68°50\'N16°22\'E）中密封的骨沉积物的独特年代学。该沉积物的历史可追溯到从晚冰川末期[到现在（kacalB.P.）之前的约1.3万年校准]到全新世的最大热（〜5.6kacalB.P.）的气候变暖时期。古遗传分析使我们能够利用1000个形态学上无法识别的骨骼碎片，从而产生具有40个不同分类单元的高分辨率序列，包括以前在这里没有发现的物种。我们的记录显示，在过去的变暖时期，北极圈上方的海洋和陆地环境中都是一种自然反复出现的现象，提供对当今正在进行的整个生态系统响应的基本见解。
