北极鱼类揭示了不同栖息地的放射性碳年龄模式以及最近的气候变化

IF 5.1 2区 地球科学 Q1 LIMNOLOGY
Ashley E. Stanek, Jonathan A. O'Donnell, Michael P. Carey, Sarah M. Laske, Xiaomei Xu, Kenneth H. Dunton, Vanessa R. von Biela
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引用次数: 0

摘要

气候变化改变了北极食物网中碳的来源和年龄,促进了永久冻土层退化释放老碳。放射性碳(14C)可追踪碳源和碳龄,但快速变暖之前的数据非常罕见,限制了对不同时期的评估。我们利用约 40 年前收集的 14C 数据,将鱼类作为天然取样器,并在今天对相同物种重新取样。在重新取样的鱼类中,使用淡水食物网的鱼类具有最古老的 14C 年龄(公元前 1000 年),而使用海洋食物网的鱼类具有最年轻的 14C 年龄(接近现代)。一种洄游鱼类涵盖了整个 14C 年龄范围,因为幼鱼在淡水溪流中觅食,而成鱼则在近海海洋栖息地中觅食。在大约 40 年的时间里,淡水和海洋摄食鱼类的平均 14C 年龄更接近大气值,这表明 "北极绿化 "可能会产生影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Arctic fishes reveal patterns in radiocarbon age across habitats and with recent climate change
Climate change alters the sources and age of carbon in Arctic food webs by fostering the release of older carbon from degrading permafrost. Radiocarbon (14C) traces carbon sources and age, but data before rapid warming are rare and limit assessments over time. We capitalized on 14C data collected ~ 40 years ago that used fish as natural samplers by resampling the same species today. Among resampled fish, those using freshwater food webs had the oldest 14C ages (> 1000 yr BP), while those using marine food webs had the youngest 14C ages (near modern). One migratory species encompassed the entire range of 14C ages because juveniles fed in freshwater streams and adults fed in offshore marine habitats. Over ~ 40 yr, average 14C ages of freshwater and marine feeding fish shifted closer to atmospheric values, suggesting a potential influence from “greening of the Arctic.”
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来源期刊
CiteScore
10.00
自引率
3.80%
发文量
63
审稿时长
25 weeks
期刊介绍: Limnology and Oceanography Letters (LO-Letters) serves as a platform for communicating the latest innovative and trend-setting research in the aquatic sciences. Manuscripts submitted to LO-Letters are expected to present high-impact, cutting-edge results, discoveries, or conceptual developments across all areas of limnology and oceanography, including their integration. Selection criteria for manuscripts include their broad relevance to the field, strong empirical and conceptual foundations, succinct and elegant conclusions, and potential to advance knowledge in aquatic sciences.
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