Establishing fluvial silicon regimes and their stability across the Northern Hemisphere

IF 5.1 2区 地球科学 Q1 LIMNOLOGY
Keira Johnson, Kathi Jo Jankowski, Joanna Carey, Nicholas J. Lyon, William H. McDowell, Arial Shogren, Adam Wymore, Lienne Sethna, Wilfred M. Wollheim, Amanda E. Poste, Pirkko Kortelainen, Ruth Heindel, Hjalmar Laudon, Antti Räike, Jeremy B. Jones, Diane McKnight, Paul Julian, Sidney Bush, Pamela L. Sullivan
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引用次数: 0

Abstract

Fluvial silicon (Si) plays a critical role in controlling primary production, water quality, and carbon sequestration through supporting freshwater and marine diatom communities. Geological, biogeochemical, and hydrological processes, as well as climate and land use, dictate the amount of Si exported by streams. Understanding Si regimes—the seasonal patterns of Si concentrations—can help identify processes driving Si export. We analyzed Si concentrations from over 200 stream sites across the Northern Hemisphere to establish distinct Si regimes and evaluated how often sites moved among regimes over their period of record. We observed five distinct regimes across diverse stream sites, with nearly 60% of sites exhibiting multiple regime types over time. Our results indicate greater spatial and interannual variability in Si seasonality than previously recognized and highlight the need to characterize the watershed and climate variables that affect Si cycling across diverse ecosystems.

Abstract Image

建立北半球河川硅机制及其稳定性
冲积硅(Si)通过支持淡水和海洋硅藻群落,在控制初级生产、水质和碳封存方面发挥着至关重要的作用。地质、生物地球化学和水文过程以及气候和土地利用决定了溪流输出的硅量。了解硅机制--硅浓度的季节性模式--有助于确定硅输出的驱动过程。我们分析了北半球 200 多个溪流地点的硅浓度,建立了不同的硅机制,并评估了这些地点在其记录期间在不同机制之间移动的频率。我们在不同的溪流地点观察到了五种不同的体系,其中近 60% 的地点随着时间的推移呈现出多种体系类型。我们的研究结果表明,硅季节性的空间和年际变异性比以前认识到的更大,并强调了描述影响不同生态系统硅循环的流域和气候变量特征的必要性。
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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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