Contributions of terrestrial organic carbon to northern lake sediments
Contributions of terrestrial organic carbon to northern lake sediments
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陆地有机碳对北部湖泊沉积物的贡献
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
J. Karlsson
中科院分区：
文献类型：
--
作者：
C. Gudasz;M. Ruppenthal;K. Kalbitz;C. Cerli;S. Fiedler;Y. Oelmann;A. Andersson;J. Karlsson
北部湖泊的沉积物封存了大量的有机碳(OC)，但缺乏直接证据证明其来源的相对重要性。我们使用表层土壤、藻类和表层沉积物中非交换性氢的稳定同位素比值(δ2HN)来测量瑞典14个北极山地和低地北方湖泊表层沉积物中陆地有机碳的相对贡献。陆地对沉积物有机碳库的贡献平均为66%(范围46-80)，北极和北方湖泊之间的贡献相似。陆生和藻类有机碳供应的替代指标解释了陆生有机碳在湖泊之间相对贡献的趋势。然而，这些数据表明，瑞典湖泊中陆源有机碳的主要来源是不同的，低地北方湖泊中的溶解物质占主导地位，而北极山区湖泊中的颗粒态有机碳占主导地位。
Sediments of northern lakes sequester large amounts of organic carbon (OC), but direct evidence of the relative importance of their sources is lacking. We used stable isotope ratios of nonexchangeable hydrogen (δ2Hn) in topsoil, algae, and surface sediments in order to measure the relative contribution of terrestrial OC in surface sediments of 14 mountainous arctic and lowland boreal lakes in Sweden. The terrestrial contribution to the sediment OC pool was on average 66% (range 46–80) and similar between arctic and boreal lakes. Proxies for the supply of terrestrial and algal OC explained trends in the relative contribution of terrestrial OC across lakes. However, the data suggest divergent predominant sources for terrestrial OC of sediments in Swedish lakes, with dissolved matter dominating in lowland boreal lakes and particulate OC in mountainous arctic lakes.
用于测量土壤有机质中不可交换氢稳定同位素比的优化脱盐技术
影响因子：
11.4
作者：
Ruppenthal;Oelmann;Wilcke
通讯作者：
Wilcke