Article
Environmental Sciences
Kai Xiao, Peng Zhang, Isaac R. Santos, Jun-Jian Wang, Zhenyang Li, Xuejing Wang, Ying-Hui Wang, Meiqing Lu, Licong Zhang, Hailong Li
Summary: Dissolved organic matter (DOM) in highly productive intertidal mangroves plays a significant role as a carbon and nutrient source in the coastal ocean. The influence of groundwater flow on DOM properties and fluxes remains poorly understood. This study highlights the importance of tidal hydrology in controlling groundwater DOM characteristics.
WATER RESOURCES RESEARCH
(2023)
Article
Engineering, Civil
Clarissa Glaser, Sven Frei, Gudrun Massmann, Benjamin Silas Gilfedder
Summary: This study evaluates the interaction between terrestrial aquifer system, catchment morphology, and coastal SGD flux on a tidal creek system in Spiekeroog, Germany. The findings show that the spatial and temporal exchange of fresh and saline water between the catchment and coastal zone is influenced by tidal creeks and catchment morphology.
JOURNAL OF HYDROLOGY
(2021)
Article
Geosciences, Multidisciplinary
Yi Liu, Yurong Song, Jiu Jimmy Jiao
Summary: Coastal ocean acidification is a global problem due to climate change, and the study reveals a close relationship between submarine groundwater discharge (SGD) and coastal ocean acidification in Hong Kong's coastal waters. The direct influence of SGD on seawater pH decline is evaluated for the first time, and the results show that SGD contributes significantly to seawater pH variation through direct input of carbonate species. In addition, SGD also affects seawater pH through nutrient loadings. Understanding and managing groundwater is crucial in mitigating coastal ocean acidification.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Environmental Sciences
James W. Heiss, Bryce Mase, Chengji Shen
Summary: This study investigates the impact of increased tidal flooding frequency on salinity and flow dynamics in coastal aquifers due to sea level rise. The results show that tidal flooding leads to salinization of the upper aquifer, and the dynamics are controlled by the interaction between sea level rise and tidal forcing. Tidal flooding also enhances saltwater-freshwater mixing in the intertidal zone.
WATER RESOURCES RESEARCH
(2022)
Review
Geosciences, Multidisciplinary
Magdalena Diak, Michael Ernst Boettcher, Catia Milene Ehlert von Ahn, Wei-Li Hong, Monika Kedra, Lech Kotwicki, Katarzyna Koziorowska-Makuch, Karol Kulinski, Aivo Lepland, Przemyslaw Makuch, Arunima Sen, Aleksandra Winogradow, Marc Juergen Silberberger, Beata Szymczycha
Summary: This study reviews the interactions between permafrost and groundwater, with a focus on recharge and discharge in the Arctic and the Qinghai-Tibet Plateau. It found that the geochemical composition of groundwater is site-specific and varies within aquifers, reflecting water-rock interactions. The study also observed that permafrost thaw increases groundwater discharge on land, and climate warming is likely to accelerate permafrost degradation and enhance hydrological connectivity. With regards to submarine groundwater discharge, the impact of permafrost thaw can either reinforce or reduce it, depending on the changes in aquifer pressure. The study highlights the need for long-term interdisciplinary in situ measurements for accurate predictions of groundwater flow and permafrost dynamics in a warmer climate.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Water Resources
Raymond D. Craddock, Gavin W. Kennedy, Rob C. Jamieson, Jonathan Keizer, Aaron A. Mohammed, Barret L. Kurylyk
Summary: This study focuses on understanding the pathways of groundwater flow and associated solute transport to the ocean in Mabou Harbour, Nova Scotia, Canada. The results show that seaward stream baseflow exceeds direct submarine groundwater discharge (SGD) in this till dominated coastal aquifer. The majority of SGD originates in the subcatchment surrounding the harbour, indicating limited intermediate or regional flow. The shorter flow paths and residence times for direct SGD may have implications for groundwater contamination in this harbour.
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
(2022)
Article
Ecology
Poornima Unnikrishnan, Reji Srinivas, Murugan Ramasamy, D. S. Suresh Babu
Summary: The study investigated submarine groundwater discharge and its behavior influenced by coastal geomorphology and geology. Numerical models were developed to estimate the magnitude of SGD from different catchments on the Southwest coast of India. The results showed significant differences in SGD flux between catchments, with potential implications for designing aquifer recharge options and optimum pumping quantities.
REGIONAL STUDIES IN MARINE SCIENCE
(2021)
Article
Environmental Sciences
Yuxuan Hou, Jie Yang, Christopher J. Russoniello, Tianyuan Zheng, Mei-lin Wu, Xuan Yu
Summary: Shrimp aquaculture can lead to groundwater salinization and increased submarine groundwater discharge (SGD), but research on this topic is limited. In this study, a numerical simulation approach was used to assess the impacts of shrimp farm irrigation on groundwater salinization and SGD. The results showed that pond water depth had a primary control on the mass of saltwater infiltration, while farm width had a primary control on recovery rate. Both pond water salinity and depth affected fresh and saline SGD. This study highlights the previously unrecognized mechanism of aquaculture on coastal aquifer vulnerability and SGD, emphasizing the need for further research on the impact of aquaculture on coastal groundwater resources.
WATER RESOURCES RESEARCH
(2022)
Article
Environmental Sciences
Xiaolong Geng, Holly A. Michael
Summary: The study highlights the significant role of three-dimensional groundwater movement in heterogeneous coastal aquifers, especially in systems with connected high-permeability geological features. Three-dimensional flowpaths and travel times are longer compared to two-dimensional in onshore areas, but shorter offshore, particularly in conduit-type models with highly preferential flow. Flowpath lengths and travel times vary greatly in three-dimensional simulations compared to two-dimensional across all heterogeneous systems.
WATER RESOURCES RESEARCH
(2021)
Article
Environmental Sciences
Xuan Yu, Holly A. Michael
Summary: Numerical models of variable-density groundwater flow and salt transport are crucial for predicting salinity distributions in coastal aquifers and estimating submarine groundwater discharge. The study found that the scale of representation of heterogeneity significantly impacts salinity distributions and flow paths, and simulated density distributions control both the rate and direction of subsurface saltwater circulation.
WATER RESOURCES RESEARCH
(2022)
Article
Engineering, Environmental
K. H. Cheng, Xin Luo, Jiu Jimmy Jiao, Shengchao Yu
Summary: Storm events can stimulate the growth of subsurface E. coli and accelerate their exports into coastal waters. The findings are important for preventing coastal water pollution and managing coastal safety during extreme weather events.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
Tybaud Goyetche, Linda Luquot, Jesus Carrera, Laura Martinez-Perez, Albert Folch
Summary: In coastal aquifers, seawater intrusion and submarine groundwater discharge are two opposing processes that require characterization and quantification to assess the quality and composition of the water. This study proposes a methodology using principal component analysis to identify water sources and reactions, and quantify mixing ratios and the extent of chemical reactions. The research highlights the importance of cation exchange and its impact on other reactions, as well as the spatial distribution of reactions in the aquifer.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Wei Wen Wong, Ian Cartwright, Seng Chee Poh, Perran Cook
Summary: The study utilized stable and radiogenic isotopes along with nitrogen concentrations to evaluate nitrogen sources and cycling processes in Port Phillip Bay, Australia, highlighting the importance of terrestrial-coastal interactions and submarine groundwater discharge as significant pathways of nitrogen inputs. The high nitrogen concentrations were attributed to nitrified sewage effluent, atmospheric deposition, and groundwater and sewage inputs. More efforts are needed to quantify the relative contributions of multiple nitrogen input pathways in future research.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Civil
Maxime Savatier, Carlos Rocha
Summary: Studies have shown that different marine tracer-based methods can lead to large discrepancies in estimating submarine groundwater discharge, while Estuarine dynamic model based on transect data may provide more accurate results.
JOURNAL OF HYDROLOGY
(2021)
Article
Engineering, Civil
Katie M. Coluccio, Isaac R. Santos, Luke C. Jeffrey, Leanne K. Morgan
Summary: The research quantified groundwater seepage into a large and shallow coastal lagoon using a detailed radon mass balance. Findings showed higher groundwater discharge in summer compared to winter, with wind-driven radon evasion being the most influential factor. Despite uncertainties, groundwater seepage was identified as an important component of the water budget at the site.
JOURNAL OF HYDROLOGY
(2021)
Article
Geosciences, Multidisciplinary
Yalalt Nyamgerel, Hyejung Jung, Dong-Chan Koh, Kyung-Seok Ko, Jeonghoon Lee
Summary: This study investigates the temporal and spatial variations in soil moisture and temperature due to snow and its melt in different elevation regions. The results show that high elevation sites have longer snow cover compared to low elevation sites. The study suggests that artificial snow may potentially influence groundwater quality.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Agronomy
Hong-Il Kwon, Dong-Chan Koh, Byong-Wook Cho, Youn-Young Jung
Summary: This study evaluated the spatiotemporal variations of water flow and nutrients in a mesoscale agricultural catchment along riparian zones. The findings highlight the significant impact of agricultural activities on stream-aquifer interactions and nutrient delivery.
AGRICULTURAL WATER MANAGEMENT
(2022)
Article
Geochemistry & Geophysics
YeoJin Ju, Chan-ho Jeong, Dong-Chan Koh, Yoon-Yeol Yoon, Eun-Hee Koh, Kang-Kun Lee, Dugin Kaown
Summary: This study compiled measurements from 122 shallow wells and used the non-atmospheric (excess) 4He distribution to investigate the origin and distribution of radioactivity in shallow groundwater.
APPLIED GEOCHEMISTRY
(2022)
Article
Biotechnology & Applied Microbiology
Hye-Ji Noh, Jung Min Park, Yoo Jin Kwon, Kyunghwan Kim, Sung Yurb Park, Insu Kim, Jong Hyun Lim, Byoung Kook Kim, Byung-Yong Kim
Summary: Heat-killed LP8 modulates immune responses through different mechanisms, including enhancing phagocytic activity of macrophages, inducing pro-inflammatory cytokine production, and suppressing immune responses to pathogen infections.
JOURNAL OF MICROBIOLOGY AND BIOTECHNOLOGY
(2022)
Article
Microbiology
Bernhard Kepplinger, Xin Wen, Andrew Robert Tyler, Byung-Yong Kim, James Brown, Peter Banks, Yousef Dashti, Eilidh Sohini Mackenzie, Corinne Wills, Yoshikazu Kawai, Kevin John Waldron, Nicholas Edward Ellis Allenby, Ling Juan Wu, Michael John Hall, Jeff Errington
Summary: The growth of rod-shaped bacteria relies on the insertion of new peptidoglycan into the cell wall, which is guided by a protein machine called the rod complex or elongasome. High concentrations of Mg2+ can rescue the growth of mutants affected in rod complex function. A compound called mirubactin C, found in actinobacterial extracts, was identified to rescue growth at low concentrations.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Cell Biology
Hyun-Ji Oh, Heegu Jin, Byung-Yong Kim, Ok-Hwan Lee, Boo-Yong Lee
Summary: A natural compound CHDT, made from Angelica gigas and Artemisia dracunculus, has been found to potentially prevent muscle atrophy by regulating the Akt/mTOR signaling pathway and reducing the production of inflammatory cytokines.
Article
Nutrition & Dietetics
Hye Rim Kim, Eunsol Seo, Seyeon Oh, MinYeong Seo, Kyunghee Byun, Byung-Yong Kim
Summary: This study demonstrates that multi-strain probiotic treatment can alleviate obesity induced by high-carbohydrate diet, modulating the expression of genes related to fat composition, fat metabolism, and thermogenesis. It also improves the levels of obesity-related hormones and reverses the Firmicutes/Bacteroidetes ratio in the gut microbiota.
Article
Food Science & Technology
Hyeon Deok Kim, Keun Suk Lee, Kyung Eun Lee, Hyung Joo Suh, Byung-Yong Kim
Summary: Enzymatic treatment and fermentation of pea protein can lower the molecular weight, modify the secondary structure of protein, and improve digestibility and bioavailability.
FOOD SCIENCE AND BIOTECHNOLOGY
(2023)
Article
Engineering, Environmental
Dugin Kaown, Dong-Chan Koh, Bernhard Mayer, Juergen Mahlknecht, YeoJin Ju, Sung-Keun Rhee, Ji-Hoon Kim, Dong Kyu Park, Inwoo Park, Hye-Lim Lee, Yoon Yeol Yoon, Kang-Kun Lee
Summary: This study investigated the sources of nutrients and the effects of groundwater-surface water interactions on nutrient variation in a large river in South Korea. The results showed that manure and sewage contributed significantly to groundwater nitrate, as well as nitrate in surface water. The findings also revealed that the occurrence of cyanobacterial blooms in the river during the wet season was governed by the increased contributions of groundwater carrying manure-derived nutrients. The integrated approach using multiple isotopes and microbiological data proved to be highly effective in evaluating nutrient sources and delineating hydrological interactions between groundwater and surface water.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Food Science & Technology
Eunsol Seo, Hee Ho Song, Heebal Kim, Byung-Yong Kim, ShinJae Park, Hyung Joo Suh, Yejin Ahn
Summary: The protective effect of mixed probiotics against UVB-induced photoaging in both cells and mice was investigated in this study. The probiotics significantly improved skin moisture, transepidermal water loss, erythema, and skin thickness. They also suppressed wrinkle formation by regulating the expression of matrix metalloproteinases and tissue inhibitors of MMPs. In addition, the probiotics reduced inflammatory cytokine levels and phosphorylation of certain proteins in the MAPK pathway. The study also found that the probiotics modulated the gut microbiome and increased the abundance of Lactobacillus and Akkermansia.
MOLECULAR NUTRITION & FOOD RESEARCH
(2023)
Article
Engineering, Environmental
YeoJin Ju, Dong-Chan Koh, Dong-Hun Kim, Bernhard Mayer, Hong-il Kwon
Summary: This study investigated a riparian aquifer in South Korea that was experiencing declining groundwater levels and elevated nitrate concentrations due to agricultural activities. The main sources of nitrate contamination were identified as manure and sewage, and denitrification was the dominant removal process. The study also found the presence of denitrification and anammox genes in the microbial communities, supporting effective natural nitrate attenuation. Denitrification reduced nitrate flux into the nearby stream, with most of the generated N2 escaping into the atmosphere.
Article
Food Science & Technology
Hee Ho Song, Ki-Bae Hong, Sunhoo Kim, Byung-Yong Kim, Shin Hyung Shik, Hyung Joo Suh, Yejin Ahn
Summary: Fish collagen supplementation improves skin moisture and reduces wrinkles by regulating extracellular matrix homeostasis, reactive oxygen species and cytokine production, as well as gut microbiota composition.
JOURNAL OF FUNCTIONAL FOODS
(2023)
Article
Microbiology
Jin-Ju Jeong, Raja Ganesan, Yoo-Jeong Jin, Hee Jin Park, Byeong Hyun Min, Min Kyo Jeong, Sang Jun Yoon, Mi Ran Choi, Jieun Choi, Ji Hyun Moon, Uigi Min, Jong-Hyun Lim, Do Yup Lee, Sang Hak Han, Young Lim Ham, Byung-Yong Kim, Ki Tae Suk
Summary: This study evaluated the effect of intragastric administration of probiotics on loperamide-induced constipation in rats. The multi-strain probiotics significantly increased the number of fecal pellets and improved gastrointestinal transit rate. The mRNA expression levels of serotonin- and mucin-related genes in the treated colons were significantly increased. Short-chain fatty acids, serotonin, and mucin levels were altered through improvement in intestinal microflora.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Microbiology
Sang Jun Yoon, Jeong Seok Yu, Byeong Hyun Min, Haripriya Gupta, Sung-Min Won, Hee Jin Park, Sang Hak Han, Byung-Yong Kim, Kyung Hwan Kim, Byoung Kook Kim, Hyun Chae Joung, Tae-Sik Park, Young Lim Ham, Do Yup Lee, Ki Tae Suk
Summary: This study evaluated the effect of Bifidobacterium breve and Bifidobacterium longum on nonalcoholic fatty liver disease (NAFLD) pathology and explored the molecular mechanisms. The results showed that the treatment with Bifidobacterium improved liver histology and function, gut barrier function, gut microbiome composition, and metabolite levels. Furthermore, gene expression related to lipid and glucose metabolism and the immune response were regulated by the treatment, indicating a coordinated effect on NAFLD.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Jong Hyun Oh, Dong-Chan Koh, Yongjae Yu, Byong-Wook Cho, Byoung-Woo Yum, Sung Won Kim
Summary: In fractured crystalline bedrock aquifers, groundwater flows through discontinuous surfaces such as joints and faults and reacts with the rocks for a long time. The study investigated the hydrogeochemical characteristics of major elements in groundwater in the Eumseong basin and surrounding areas, which have diverse bedrock lithology and large-scale faults. Analysis of 78 groundwater samples showed that cation concentrations followed the order of Ca2+, Na+, Mg2+, and K+, while anion concentrations were HCO3-, SO42-, Cl-, and NO3-. The concentrations of major elements were influenced by the total depth of the wells and the type of bedrock lithology.
JOURNAL OF THE GEOLOGICAL SOCIETY OF KOREA
(2023)