气候变化和城市化对河流溶解有机碳数量和组成的解耦作用

IF 5.5 2区 地球科学 Q1 ENVIRONMENTAL SCIENCES
James D. Kelley, Sandra Klemet-N'Guessan, Nolan J. T. Pearce, Claire M. Stevens, Anthony J. Arsenault, Miracle Denga, P. V. Sasindu L. Gunawardana, Sarah S. E. King, Carolina N. Koebel, Sherryann A. Prowell, Most Shirina Begum, Marguerite A. Xenopoulos
{"title":"气候变化和城市化对河流溶解有机碳数量和组成的解耦作用","authors":"James D. Kelley,&nbsp;Sandra Klemet-N'Guessan,&nbsp;Nolan J. T. Pearce,&nbsp;Claire M. Stevens,&nbsp;Anthony J. Arsenault,&nbsp;Miracle Denga,&nbsp;P. V. Sasindu L. Gunawardana,&nbsp;Sarah S. E. King,&nbsp;Carolina N. Koebel,&nbsp;Sherryann A. Prowell,&nbsp;Most Shirina Begum,&nbsp;Marguerite A. Xenopoulos","doi":"10.1029/2025GB008534","DOIUrl":null,"url":null,"abstract":"<p>Dissolved organic carbon (DOC) is a ubiquitous component of freshwater ecosystems that is sensitive to global change. In turn, DOC controls fundamental biogeochemical processes and functions. These controls depend on both the amount and composition of organic molecules comprising the dissolved organic matter (DOM) pool, which reflects the relative contributions of catchment-derived terrestrial inputs and in situ production. Stream DOM fluctuates with land use, soil mobility, and hydrology; however, few studies have monitored long-term changes in DOM composition to investigate links with climate. Here, we characterized 17-year trends in DOC and DOM in 48 streams across a land use gradient and modeled patterns therein with climatic and hydrological conditions. Across streams, Mann-Kendall trend analyses showed that DOC decreased through time, while DOM became fresher, more aromatic, and contained an increased proportion of urban-derived DOM from the terrestrial catchment. Using generalized additive models, we observed significant linear, unimodal, and multimodal patterns in DOM composition with precipitation and soil temperature. Generally, precipitation increased terrestrial DOM, whereas soil temperature increased urban-derived DOM, particularly in catchments characterized by increasing levels of urbanization. Our study highlights the importance of long-term monitoring in understanding dynamic interactions between terrestrial—fluvial carbon transfer and biogeochemical effects of global climate change and urbanization. Altogether, our results show that interactions between climate change and urbanization will shape future DOM dynamics in streams.</p>","PeriodicalId":12729,"journal":{"name":"Global Biogeochemical Cycles","volume":"39 8","pages":""},"PeriodicalIF":5.5000,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2025GB008534","citationCount":"0","resultStr":"{\"title\":\"Climate Change and Urbanization Decouple Dissolved Organic Carbon Quantity and Composition in Streams\",\"authors\":\"James D. Kelley,&nbsp;Sandra Klemet-N'Guessan,&nbsp;Nolan J. T. Pearce,&nbsp;Claire M. Stevens,&nbsp;Anthony J. Arsenault,&nbsp;Miracle Denga,&nbsp;P. V. Sasindu L. Gunawardana,&nbsp;Sarah S. E. King,&nbsp;Carolina N. Koebel,&nbsp;Sherryann A. Prowell,&nbsp;Most Shirina Begum,&nbsp;Marguerite A. Xenopoulos\",\"doi\":\"10.1029/2025GB008534\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Dissolved organic carbon (DOC) is a ubiquitous component of freshwater ecosystems that is sensitive to global change. In turn, DOC controls fundamental biogeochemical processes and functions. These controls depend on both the amount and composition of organic molecules comprising the dissolved organic matter (DOM) pool, which reflects the relative contributions of catchment-derived terrestrial inputs and in situ production. Stream DOM fluctuates with land use, soil mobility, and hydrology; however, few studies have monitored long-term changes in DOM composition to investigate links with climate. Here, we characterized 17-year trends in DOC and DOM in 48 streams across a land use gradient and modeled patterns therein with climatic and hydrological conditions. Across streams, Mann-Kendall trend analyses showed that DOC decreased through time, while DOM became fresher, more aromatic, and contained an increased proportion of urban-derived DOM from the terrestrial catchment. Using generalized additive models, we observed significant linear, unimodal, and multimodal patterns in DOM composition with precipitation and soil temperature. Generally, precipitation increased terrestrial DOM, whereas soil temperature increased urban-derived DOM, particularly in catchments characterized by increasing levels of urbanization. Our study highlights the importance of long-term monitoring in understanding dynamic interactions between terrestrial—fluvial carbon transfer and biogeochemical effects of global climate change and urbanization. Altogether, our results show that interactions between climate change and urbanization will shape future DOM dynamics in streams.</p>\",\"PeriodicalId\":12729,\"journal\":{\"name\":\"Global Biogeochemical Cycles\",\"volume\":\"39 8\",\"pages\":\"\"},\"PeriodicalIF\":5.5000,\"publicationDate\":\"2025-08-26\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2025GB008534\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Global Biogeochemical Cycles\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2025GB008534\",\"RegionNum\":2,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENVIRONMENTAL SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Global Biogeochemical Cycles","FirstCategoryId":"89","ListUrlMain":"https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2025GB008534","RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
引用次数: 0

摘要

溶解有机碳(DOC)是淡水生态系统中普遍存在的对全球变化敏感的组成部分。DOC反过来又控制着基本的生物地球化学过程和功能。这些控制取决于构成溶解有机质(DOM)池的有机分子的数量和组成,这反映了来自流域的陆地输入和原位生产的相对贡献。河流DOM随土地利用、土壤流动性和水文变化而波动;然而,很少有研究监测DOM组成的长期变化,以调查其与气候的关系。在这里,我们描述了48条河流在不同土地利用梯度下的17年DOC和DOM趋势,并在气候和水文条件下模拟了其中的模式。跨河流,Mann-Kendall趋势分析表明,DOC随着时间的推移而减少,而DOM变得更新鲜,更芳香,并且含有来自陆地流域的城市来源DOM的比例增加。利用广义加性模型,我们观察到DOM组成与降水和土壤温度之间存在显著的线性、单峰和多峰关系。总体而言,降水增加了陆源DOM,而土壤温度增加了城市源DOM,特别是在城市化水平不断提高的集水区。我们的研究强调了长期监测对于理解陆地-河流碳转移与全球气候变化和城市化的生物地球化学效应之间的动态相互作用的重要性。总之,我们的研究结果表明,气候变化和城市化之间的相互作用将影响未来河流中DOM的动态。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Climate Change and Urbanization Decouple Dissolved Organic Carbon Quantity and Composition in Streams

Climate Change and Urbanization Decouple Dissolved Organic Carbon Quantity and Composition in Streams

Climate Change and Urbanization Decouple Dissolved Organic Carbon Quantity and Composition in Streams

Climate Change and Urbanization Decouple Dissolved Organic Carbon Quantity and Composition in Streams

Dissolved organic carbon (DOC) is a ubiquitous component of freshwater ecosystems that is sensitive to global change. In turn, DOC controls fundamental biogeochemical processes and functions. These controls depend on both the amount and composition of organic molecules comprising the dissolved organic matter (DOM) pool, which reflects the relative contributions of catchment-derived terrestrial inputs and in situ production. Stream DOM fluctuates with land use, soil mobility, and hydrology; however, few studies have monitored long-term changes in DOM composition to investigate links with climate. Here, we characterized 17-year trends in DOC and DOM in 48 streams across a land use gradient and modeled patterns therein with climatic and hydrological conditions. Across streams, Mann-Kendall trend analyses showed that DOC decreased through time, while DOM became fresher, more aromatic, and contained an increased proportion of urban-derived DOM from the terrestrial catchment. Using generalized additive models, we observed significant linear, unimodal, and multimodal patterns in DOM composition with precipitation and soil temperature. Generally, precipitation increased terrestrial DOM, whereas soil temperature increased urban-derived DOM, particularly in catchments characterized by increasing levels of urbanization. Our study highlights the importance of long-term monitoring in understanding dynamic interactions between terrestrial—fluvial carbon transfer and biogeochemical effects of global climate change and urbanization. Altogether, our results show that interactions between climate change and urbanization will shape future DOM dynamics in streams.

求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Global Biogeochemical Cycles
Global Biogeochemical Cycles 环境科学-地球科学综合
CiteScore
8.90
自引率
7.70%
发文量
141
审稿时长
8-16 weeks
期刊介绍: Global Biogeochemical Cycles (GBC) features research on regional to global biogeochemical interactions, as well as more local studies that demonstrate fundamental implications for biogeochemical processing at regional or global scales. Published papers draw on a wide array of methods and knowledge and extend in time from the deep geologic past to recent historical and potential future interactions. This broad scope includes studies that elucidate human activities as interactive components of biogeochemical cycles and physical Earth Systems including climate. Authors are required to make their work accessible to a broad interdisciplinary range of scientists.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信