Biogeochemical tools for characterizing organic carbon in inland aquatic ecosystems
Biogeochemical tools for characterizing organic carbon in inland aquatic ecosystems
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DOI：
10.1002/lol2.10097
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发表时间：
2018-12-01
影响因子：
7.8
通讯作者：
Kothawala, D. N.
中科院分区：
文献类型：
--
作者：
McCallister, S. L.;Ishikawa, N. F.;Kothawala, D. N.
将内陆水域纳入区域和全球碳(C)预算，需要全面了解管理有机碳(OC)输送和就地加工的因素。本研究综述了光学、分子和同位素方法在解决水生系统中有机碳的来源、年龄和转化方面的进展。使用激发发射矩阵光谱、傅里叶变换离子回旋加速器质谱仪和核磁共振的OC表征提供了详细的分子水平洞察。放射性碳同位素方法和化合物特定技术决定了有机碳在从溪流到开阔海洋的大小生态系统中的输入、代谢命运和周转时间。越来越多的证据表明，水生有机碳由多种生物地球化学组分组成。最后，我们提出了一些持久的和新出现的问题，这些问题强调了内陆系统在全球碳循环中的作用，并提出了独特的方法组合，以更好地识别它们在有机碳从土壤到海洋的输送和转化中的作用。
Integration of inland waters into regional and global carbon (C) budgets requires a comprehensive understanding of factors regulating organic carbon (OC) delivery and in situ processing. This study reviews advances in optical, molecular, and isotopic approaches to resolve the sources, ages, and transformations of OC in aquatic systems. OC characterization using excitation emission matrix spectra, Fourier transform ion cyclotron mass spectrometry, and nuclear magnetic resonance provides detailed molecular level insight. Radiocarbon isotopic approaches and compound-specific techniques resolve the input, metabolic fate, and turnover time of OC in ecosystems ranging in size from streams to the open ocean. Accumulating evidence suggests that aquatic OC is composed of diverse biogeochemical components. We conclude with enduring and emerging questions that underscore the role of inland systems in the global C cycle and propose unique combinations of approaches to better discern their role in the delivery and transformation of OC from soils to seas.