Human Activities Reshape Greenhouse Gas Emissions From Inland Waters

Bibliographische Detailangaben
Veröffentlicht in:	Global change biology. - 1999. - 31(2025), 3 vom: 18. März, Seite e70139
1. Verfasser:	Liu, Shaoda (VerfasserIn)
Weitere Verfasser:	Wang, Junfeng, Xu, Wenhao, Zhang, Peijia, Zhang, Sibo, Chen, Xin, Zhang, Zhuangzhuang, Huang, Wei, Zheng, Wenxiu, Xia, Xinghui
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2025
Zugriff auf das übergeordnete Werk:	Global change biology
Schlagworte:	Journal Article Review agriculture carbon greenhouse gases human activities inland waters reservoirs urbanization Greenhouse Gases mehr... Methane OP0UW79H66 Carbon Dioxide 142M471B3J Air Pollutants

Beschreibung
Zusammenfassung:	© 2025 John Wiley & Sons Ltd. Inland waters are significant sources of greenhouse gases (GHGs) in an increasingly human-dominated world, yet the mechanisms by which human activities reshape GHG emissions from these systems remain poorly understood. Here, we synthesized research from three human-dominated landscapes-agricultural, urban, and impounded river systems-to demonstrate that inland waters within these systems exhibit significantly higher GHG emissions compared to their natural or seminatural counterparts. This is particularly evident for CH4 and N2O emissions, which show median enhancement ratios of 2.0-10 and 2.4-13 across the systems, respectively. In contrast, CO2 emissions exhibit overall lower enhancement (median enhancement ratios of < 2.0-3.1), largely due to simultaneously increased photosynthetic uptake from aquatic eutrophication. These observations underscore a clear human footprint on aquatic GHG emissions and the underlying biogeochemical processes. The observed changes in GHG emissions are driven by increased inputs of sediments, carbon, and nutrients from human-disturbed landscapes, coupled with the expansion of aquatic anoxia resulting from increased aquatic metabolism, fine sediment deposition, and eutrophication. Beyond altering emission rates, human activities also modify the abundance and distribution of inland waters, potentially exerting substantial, yet unquantified, effects on landscape-scale GHG emissions. We highlight the importance of understanding these processes for accurately quantifying and mitigating the human footprint on aquatic GHG emissions. Future research and mitigation efforts should account for the variability and mechanisms discussed in this review to effectively address human-induced GHG emissions from inland waters
Beschreibung:	Date Completed 13.05.2025 Date Revised 13.05.2025 published: Print Citation Status MEDLINE
ISSN:	1365-2486
DOI:	10.1111/gcb.70139