Large sediment methane production potential in reservoirs compared to lakes and rivers

IF 3.8 1区地球科学 Q1 LIMNOLOGY

Limnology and Oceanography Pub Date : 2025-04-14 DOI:10.1002/lno.70063

Pascal Bodmer, Christoph Bors, Liu Liu, Andreas Lorke

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引用次数: 0

Abstract

Inland waters emit a globally significant amount of methane (CH4) into the atmosphere. Measurements of potential CH4 production rates in the sediment can help constrain the magnitude of CH4 sources and time‐averaged emission rates. We explored the magnitude, variability, and drivers of potential CH4 production rates in the sediment, based on compiled measurements (238 sediment cores from 72 aquatic systems) following a standardized laboratory incubation procedure. The data reveal > 4‐fold higher potential CH4 production rates in reservoir sediments than lakes and > 14‐fold higher than rivers after being standardized for temperature. Sediment organic carbon content and depth below the sediment–water interface are universal drivers for potential CH4 production rates across freshwater ecosystems. The disproportional high CH4 production rate in sediments from human‐made water bodies calls for more comprehensive monitoring of their CH4 emissions to inform carbon footprint and inventory efforts. This first meta‐analysis of potential CH4 production rates in sediments from different types of freshwater aquatic systems may help with process‐based modeling of CH4 emissions from individual water bodies in larger‐scale assessments.

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与湖泊和河流相比，水库沉积物甲烷生产潜力大

内陆水域向大气排放了全球数量可观的甲烷（CH4）。测量沉积物中潜在的CH4生成速率可以帮助限制CH4源的大小和时间平均排放速率。在标准化实验室孵育程序的基础上，基于汇编的测量（来自72个水生系统的238个沉积物岩心），我们探索了沉积物中潜在CH4生成速率的幅度、变异性和驱动因素。数据显示>；水库沉积物的潜在甲烷产量是湖泊和湖泊的4倍；温度标准化后，比河流高出14倍。沉积物有机碳含量和沉积物-水界面以下深度是整个淡水生态系统潜在CH4产率的普遍驱动因素。人类水体沉积物中不成比例的高CH4生成速率要求对其CH4排放进行更全面的监测，以便为碳足迹和清查工作提供信息。这是对不同类型淡水水生系统沉积物中潜在CH4产率的首次meta分析，可能有助于在更大规模评估中对单个水体的CH4排放进行基于过程的建模。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Limnology and Oceanography 地学-海洋学

CiteScore

8.80

自引率

6.70%

发文量

254

审稿时长

3 months

期刊介绍： Limnology and Oceanography (L&O; print ISSN 0024-3590, online ISSN 1939-5590) publishes original articles, including scholarly reviews, about all aspects of limnology and oceanography. The journal''s unifying theme is the understanding of aquatic systems. Submissions are judged on the originality of their data, interpretations, and ideas, and on the degree to which they can be generalized beyond the particular aquatic system examined. Laboratory and modeling studies must demonstrate relevance to field environments; typically this means that they are bolstered by substantial "real-world" data. Few purely theoretical or purely empirical papers are accepted for review.