Article
Engineering, Civil
Eun-Ju Lee, Yera Shin, Gyu-Yeon Yoo, Eun-Byul Ko, David Butman, Peter A. Raymond, Neung-Hwan Oh
Summary: Understanding the quantity and quality of riverine carbon is crucial for predicting global carbon cycle changes and managing drinking water quality. A study in South Korea revealed that the five largest rivers annually discharge around 581 Gg of carbon, with a significant portion being released during the summer monsoon period. The Delta C-14 values for DIC, DOC, and POC varied seasonally, indicating a dynamic source of riverine carbon with influences from chemical weathering and C3 plants.
JOURNAL OF HYDROLOGY
(2021)
Article
Environmental Sciences
Yu Gao, Jiquan Chen, Neil Saintilan, Bin Zhao, Zutao Ouyang, Tingting Zhang, Haiqiang Guo, Yingying Hao, Feng Zhao, Jianyi Liu, Sikai Wang, Ping Zhuang
Summary: This study investigates the lateral hydrological carbon flux for an estuarine marsh over the course of a year. The results show a significant correlation between imported and exported dissolved organic carbon and dissolved inorganic carbon, but not for particulate organic carbon. The marsh appears to be a net exporter of dissolved organic carbon and dissolved inorganic carbon, but a net sink of particulate organic carbon. The findings highlight the importance of lateral hydrological inflows/outflows in wetland carbon budgets, especially in the meta-ecosystem framework.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Ismael Soria-Reinoso, Javier Alcocer, Salvador Sanchez-Carrillo, Felipe Garcia-Oliva, Daniel Cuevas-Lara, Daniela Cortes-Guzman, Luis A. Oseguera
Summary: This study aims to evaluate the spatial and seasonal changes of organic and inorganic carbon along the Usumacinta River and estimate the carbon fluxes into the southern Gulf of Mexico. The results show that organic carbon is mainly in the form of dissolved organic carbon (DOC) and its concentration is higher in the rainy season. Particulate carbon is positively related to total suspended solids, while inorganic carbon concentration is higher in the dry season.
Article
Geosciences, Multidisciplinary
Yue Ming, Lei Gao, Laodong Guo
Summary: Knowledge about the current state and long-term changes in organic matter regimes in large rivers is crucial due to the combined effects of human activities and climate change. In this study, water samples were collected from the lower Changjiang River over a three-year period to investigate seasonal variations in dissolved and particulate organic carbon, as well as stable isotopic composition. The results showed significant seasonal variations in organic carbon content and molecular weight distribution, indicating the influence of both autochthonous and allochthonous sources. The findings highlight the impact of human-induced changes on the organic matter dynamics in this river system.
JOURNAL OF MARINE SYSTEMS
(2023)
Article
Oceanography
Waqar Ahmed, Ying Wu, Samina Kidwai, Xiuzhen Li, Tariq Mahmood, Jing Zhang
Summary: The study focuses on the biogeochemistry of organic carbon in the Indus River, Indus Delta, and coastal waters, examining the concentrations and fluxes of dissolved organic carbon (DOC) and particulate organic carbon (POC). The research shows seasonal variations of POC in creeks, with the main sources identified as mangrove litter and benthic microalgae. Isotopic studies reveal mangroves significantly contribute to DOC and POC in the Indus Deltaic creeks.
CONTINENTAL SHELF RESEARCH
(2021)
Article
Environmental Sciences
Eun-Ju Lee, Seung-Cheol Lee, Kyuyeon Lee, Ji-Yeon Cha, Yea-Na Han, Seok Gyu Kim, Neung-Hwan Oh
Summary: Tracking the sources of organic carbon (OC) is crucial for understanding riverine carbon dynamics and improving water quality. In this study, water samples were collected from forest streams to a river in South Korea, which included wastewater treatment plant (WWTP) effluents. The concentrations, optical properties, and carbon isotope ratios of the samples were analyzed to identify the sources of OC. Anthropogenic sources of OC, such as industrial WWTP effluents and livestock WWTP effluents, were found to contribute significantly to the river's organic carbon content. These findings highlight the importance of considering anthropogenic influences when studying riverine organic carbon.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Dong Liu, Shujie Yu, Hongtao Duan
Summary: Low-frequency high-magnitude storms can transport disproportionate amounts of terrigenous organic carbon into lakes, impacting the lake carbon budget and water environment. By studying the storm-induced organic carbon transport in a eutrophic river entering Lake Taihu, it was found that the input of riverine organic carbon during storms influenced the lake water environment across a large region for more than 10 days.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Chu Zhao, Chuan Wang, Jianhong Li, Lize Meng, Jingya Xue, Yang Gao, Tao Huang, Yixin Bai, Shuaidong Li, Hao Yang, Kun Shi, Yuanhui Xu, Changchun Huang
Summary: The boom in dam construction and continuous river-lake exchange has had a profound impact on the transmission and transformation of riverine dissolved inorganic carbon (DIC). An in-depth understanding of the change mechanisms of DIC concentrations and sources driven by dam operation and lake recharge is crucial for regulating greenhouse gas emissions and evaluating the impact of DIC on the global carbon cycle.
GLOBAL BIOGEOCHEMICAL CYCLES
(2023)
Article
Biodiversity Conservation
Joshua F. Dean, Michael F. Billett, T. Edward Turner, Mark H. Garnett, Roxane Andersen, Rebecca M. McKenzie, Kerry J. Dinsmore, Andy J. Baird, Pippa J. Chapman, Joseph Holden
Summary: Peatlands are globally important stores of soil carbon, and pools within peatlands have high concentrations of carbon, including greenhouse gases. Our study shows that the carbon in the pools is mostly derived from contemporary primary production, rather than from deep peat layers. Restoration pools are effective at preventing the release of deep, old carbon, but millennial-aged carbon can be emitted through CH4 ebullition.
GLOBAL CHANGE BIOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Alexandra Tiefenbacher, Gabriele Weigelhofer, Andreas Klik, Lionel Mabit, Jakob Santner, Walter Wenzel, Peter Strauss
Summary: This study investigated the impact of rainfall intensity and antecedent soil moisture on the transportation of dissolved and particulate organic carbon in surface and subsurface runoff. Results showed that under extreme weather conditions, most organic carbon was transported as particulate organic carbon via surface runoff, while dissolved organic carbon played a crucial role in subsurface runoff. The research provides insights into how flow partitioning affects organic carbon losses and poses risks for aquatic systems.
Article
Engineering, Environmental
Katerina Novotna, Lenka Pivokonska, Lenka Cermakova, Michaela Prokopova, Katerina Fialova, Martin Pivokonsky
Summary: Widespread pollution of aquatic environments by microplastics is a serious environmental threat. This study found that different types of microplastics released significant amounts of dissolved organic carbon and inorganic carbon when in contact with water for a long time. Various elements and harmful compounds were also leached from the microplastics. These results provide insight into the transfer of various compounds from microplastics to ambient water.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Engineering, Civil
Bo Chen, Min Zhao, Hao Yan, Rui Yang, Hong-Chun Li, Douglas E. Hammond
Summary: Delta C-13 and delta C-14 measurements were conducted on dissolved inorganic carbon (DIC), particulate organic carbon (POC), and aquatic plants in a karst spring and two spring-fed ponds in southeastern Guizhou, China in 2013. The results showed that the carbon source for DIC is mainly biogenic CO2, and aquatic algae significantly increased photosynthesis during the summer. Submerged aquatic plants used DIC for photosynthesis, while emergent plants utilized atmospheric CO2. Seasonal variations in carbon isotopes were influenced by soil CO2 input and CO2 exchange, with lower C-14 values in the cold/dry season and higher values in the summer rainy season. These findings have implications for carbon dating, carbon budgets, and the behavior of carbon isotopes in karst systems.
JOURNAL OF HYDROLOGY
(2021)
Article
Environmental Sciences
Zhenwei Yan, Na Yang, Zhou Liang, Maojun Yan, Xiaosong Zhong, Yu Zhang, Wenqi Xu, Yu Xin
Summary: Large rivers like the Yellow River play a crucial role in the cycling of dissolved organic nitrogen (DON), with DON<1kDa dominating the DON pool and correlating inversely with dissolved inorganic nitrogen (DIN). Geographical features and microbial communities are closely related in driving DON cycling, highlighting the importance of DON mineralization in carbon cycling in marginal seas.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Nittala S. Sarma, G. Chiranjeevulu, Sudarsana Rao Pandi, Dokala Bhaskara Rao, V. V. S. S. Sarma
Summary: This study investigates the coupling between Chromophoric Dissolved Organic Matter (CDOM) and Dissolved Inorganic Carbon (DIC) in eighteen Indian estuaries. The study reveals a significant linear relationship between DIC, CDOM abundance, and pH level in most estuaries, with some estuaries showing elevated DIC levels and other indicators suggesting anthropogenic influence. CDOM properties, such as spectral slope and spectral slope ratio, align with these findings. The study also finds that CDOM contributes different proportions of DIC in different estuaries, indicating its importance in the organic alkalinity of estuaries.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Water Resources
Ryuichiro Shinohara, Kenji Tsuchiya, Ayato Kohzu
Summary: The study focused on the role of particulate organic phosphorus (POP) in the phosphorus cycle in the Sakura River, Japan. Findings indicated that concentrations of suspended particles and particulate phosphorus increased after rain events during irrigation, with POP accounting for 42.4% of PP concentrations. Changes in phosphorus composition were observed during decomposition experiments, with a decrease in organic phosphorus proportion as DNA-P disappeared from the PP. Additionally, the presence of suspended particles was found to increase DOP mineralization rates.
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
(2022)
Article
Environmental Sciences
Wendi Wang, Nufang Fang, Zhihua Shi, Xixi Lu
LAND DEGRADATION & DEVELOPMENT
(2018)
Article
Ecology
Chunxue Han, Tingxi Liu, Xixi Lu, Limin Duan, Vijay P. Singh, Liqun Ma
ECOLOGICAL ENGINEERING
(2019)
Article
Engineering, Civil
Maofei Ni, Siyue Li, Jiachen Luo, Xixi Lu
JOURNAL OF HYDROLOGY
(2019)
Article
Environmental Sciences
Chunxue Han, Ruihong Yu, Xixi Lu, Limin Duan, Vijay P. Singh, Tingxi Liu
SCIENCE OF THE TOTAL ENVIRONMENT
(2019)
Article
Limnology
Thi Thuy Duong, Thi Thu Hang Hoang, Trung Kien Nguyen, Thi Phuong Quynh Le, Nhu Da Le, Dinh Kim Dang, Xixi Lu, Manh Ha Bui, Quang Huy Trinh, Thi Hai Van Dinh, Thi Dau Pham, Emma Rochelle-Newall
Article
Environmental Sciences
Xiankun Yang, Xixi Lu, Edward Park, Paolo Tarolli
Article
Forestry
Guolong Hou, Claudio O. Delang, Xixi Lu, Roland Olschewski
Article
Forestry
Guolong Hou, Claudio O. Delang, Xixi Lu, Lei Gao
ANNALS OF FOREST RESEARCH
(2019)
Article
Green & Sustainable Science & Technology
Xiankun Yang, Xixi Lu, Lishan Ran, Paolo Tarolli
Article
Ecology
Lin Lin, Xixi Lu, Shaoda Liu, Shie-Yui Liong, Kaidao Fu
Article
Ecology
Thi Phuong Quynh Le, Cyril Marchand, Cuong Tu Ho, Nhu Da Le, Thi Thuy Duong, Xixi Lu, Phuong Kieu Doan, Trung Kien Nguyen, Thi Mai Huong Nguyen, Duy An Vu
Article
Ecology
Lishan Ran, Mingyang Tian, Nufang Fang, Suiji Wang, Xixi Lu, Xiankun Yang, Frankie Cho
Review
Ecology
Ji-Hyung Park, Omme K. Nayna, Most S. Begum, Eliyan Chea, Jens Hartmann, Richard G. Keil, Sanjeev Kumar, Xixi Lu, Lishan Ran, Jeffrey E. Richey, Vedula V. S. S. Sarma, Shafi M. Tareq, Do Thi Xuan, Ruihong Yu
Article
Environmental Sciences
Hewen Niu, Shichang Kang, Hailong Wang, Rudong Zhang, Xixi Lu, Yun Qian, Rukumesh Paudyal, Shijin Wang, Xiaofei Shi, Xingguo Yan
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2018)
Article
Geography, Physical
Xiaonan Shi, Fan Zhang, Xixi Lu, Zhaoyin Wang, Tongliang Gong, Guanxing Wang, Hongbo Zhang
EARTH SURFACE PROCESSES AND LANDFORMS
(2018)