Article
Environmental Sciences
Balakrishnan Manikandan, Alen Mariyam Thomas, Suhas Suresh Shetye, Sadaiappan Balamurugan, Chellandi Mohandass, Kunuyil Nandakumar
Summary: Macroalgae are taking over coral reefs globally by releasing dissolved organic carbon (DOC) that degrades the reefs. This study quantified DOC release by five macroalgae species affecting live corals and analyzed bacterial community structure changes in response to the DOC. The research showed variation in DOC lability to microbial mineralization among different macroalgae species.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Keith E. Schilling, Matthew T. Streeter, Christopher S. Jones, Peter J. Jacobson
Summary: This study examined the carbon flux from artificially-drained cropped fields. The results showed that the dominant carbon export was from inorganic carbon (IC) losses through subsurface drainage tiles. Detailed soil sampling revealed that approximately 0.23% of the total carbon content in shallow soils was lost in a single year. The study suggests the need for improved monitoring of total carbon export from fields for accurate assessment of carbon sequestration.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Civil
Andrew M. Tye, Jennifer L. Williamson, Helen P. Jarvie, Nancy B. Dise, Dan J. Lapworth, Don Monteith, Richard Sanders, Daniel J. Mayor, Michael J. Bowes, Michael Bowes, Annette Burden, Nathan Callaghan, Gareth Farr, Stacey L. Felgate, Stuart Gibb, Pete J. Gilbert, Geoff Hargreaves, Patrick Keenan, Vassilis Kitidis, Monika D. Jurgens, Adrian Martin, Ian Mounteney, Philip D. Nightingale, M. Gloria Pereira, Justyna Olszewska, Amy Pickard, Andrew P. Rees, Bryan Spears, Mark Stinchcombe, Debbie White, Peter Williams, Fred Worrall, Chris D. Evans
Summary: This study investigated the DIC and free CO2 concentrations in waters of 41 catchments in Great Britain. The study found that dissolved inorganic carbon dominates in coastal waters, while free CO2 concentrations are strongly linked to catchment macronutrient status. The findings provide a basis for developing management strategies to reduce free CO2 concentrations in rivers and mitigate its evasion to the atmosphere.
JOURNAL OF HYDROLOGY
(2022)
Article
Geosciences, Multidisciplinary
Shuzhen Song, Lei Gao, Jianzhong Ge, Wenyun Guo, Daoji Li
Summary: Nutrients and dissolved organic carbon, including carbohydrates, play a crucial role in the carbon cycle in estuarine and coastal ecosystems. Tidal variations in DOC, monosaccharide, and nutrient concentrations were observed in the Changjiang Estuary and East China Sea, with some components showing correlations with tidal phases and cycles, while others did not. The asymmetrical flood-ebb tidal variations in nutrient concentrations were likely influenced by physical and biological characteristics, with tidal forcing playing a significant role in controlling temporal variations in these components.
JOURNAL OF MARINE SYSTEMS
(2022)
Article
Engineering, Chemical
Tianting Pang, Frank Marken, Dengsong Zhang, Junjie Shen
Summary: This study reveals for the first time the impact of dissolved inorganic carbon (DIC) and dissolved organic carbon (DOC) on fluoride removal by membrane capacitive deionization (MCDI). The results show that DIC species decrease fluoride removal, while DOC has an insignificant impact at a moderate concentration.
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
Biodiversity Conservation
Xiuting Feng, Hongmei Li, Zenghu Zhang, Tianqi Xiong, Xiaoyong Shi, Chen He, Quan Shi, Nianzhi Jiao, Yongyu Zhang
Summary: By studying the long-term microbial degradation of kelp detritus, it was found that a significant amount of stable carbon can be stored for long-term carbon sequestration. Difficult to degrade organic carbon gradually forms during degradation, with microbial activity playing a crucial role in the carbon sequestration process.
ECOLOGICAL INDICATORS
(2022)
Article
Engineering, Civil
Haijuan Zhao, Yongjun Jiang, Qiong Xiao, Cheng Zhang, Hamid M. Behzad
Summary: The study reveals a close relationship between the cycling of carbon and nitrogen in karst aquatic systems, with dissolved organic carbon concentrations influenced by the metabolic pathways of subaquatic communities. The metabolic processes of photosynthesis and respiration primarily control the transformation of dissolved inorganic carbon and nitrate, with higher proportions observed in the dry season. The coupled C-N cycling involving DIC and NO3 promotes the production of autochthonous DOC, acting as long-term natural carbon and nitrogen sinks in karst aquatic systems.
JOURNAL OF HYDROLOGY
(2021)
Article
Environmental Sciences
Chaowei Lai, Zhen Ma, Zaihua Liu, Hailong Sun, Qingchun Yu, Fan Xia, Xuejun He, Qian Bao, Yongqiang Han, Xing Liu, Haibo He
Summary: This study investigated the relationships between phytoplankton and dissolved inorganic carbon (DIC) concentrations, as well as carbon isotopic composition, nutrients, and hydrochemistry in Erhai Lake. The results showed that DIC significantly affected phytoplankton productivity and community composition, particularly inhibiting harmful cyanobacteria blooms. Therefore, considering DIC could effectively assist in mitigating lake eutrophication.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2023)
Review
Environmental Sciences
Rashida Hameed, Guanlin Li, Yowhan Son, Huajun Fang, Taewan Kim, Chaodong Zhu, Yanfang Feng, Lihua Zhang, Adeel Abbas, Xin Zhao, Jiaqian Wang, Jian Li, Zhicong Dai, Daolin Du
Summary: This review highlights the molecular and chemical compositions and structural evolution of dissolved black carbon (DBC), as well as its influence on pyrolysis, interaction with soil and contaminants, stability, and potential risks in soil and water environments. Future research should focus on understanding the chemical and molecular structure of DBC, investigating its multi-functional properties and interaction mechanisms, and evaluating the environmental behaviors and risks associated with DBC after biochar application.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Fisheries
Ellie R. Paine, Damon Britton, Matthias Schmid, Elizabeth A. Brewer, Guillermo Diaz-Pulido, Philip W. Boyd, Catriona L. Hurd
Summary: This study compared the physiological responses of three seaweed species to ocean acidification and found that elevated CO2 concentrations did not benefit their growth and photosynthesis in a future ocean.
ICES JOURNAL OF MARINE SCIENCE
(2023)
Article
Environmental Sciences
Tyler J. Harrow-Lyle, Wai Ying Lam, Erik J. S. Emilson, Robert W. Mackereth, Carl P. J. Mitchell, Stephanie J. Melles
Summary: Methyl mercury (MeHg) concentrations in boreal headwater streams in Ontario, Canada are influenced by natural processes and disturbances such as forestry management. This study used a structural equation modelling approach to assess the impact of catchment characteristics and stream water chemistry on MeHg concentrations in the Dryden - Wabigoon Forest region. The results identified nitrate concentrations, water temperature, and latent watershed characteristics as important drivers of MeHg concentrations. Two plausible pathways for MeHg concentration were described: indirect effect of forest-derived nutrients increasing in-situ MeHg production, and direct supply of MeHg from inundated soils following precipitation and inundation events.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Environmental Sciences
Ling Ding, Sen Shan, Chunle Luo, Xuchen Wang
Summary: This study investigated the concentrations and distribution of dissolved organic carbon (DOC) in the South China Sea and the western North Pacific. Laboratory experiments were conducted to determine the microbiological respiration of DOC. The findings revealed that DOC concentrations in the South China Sea varied greatly and were influenced by multiple factors. Physical mixing played a significant role in the distribution of mesopelagic DOC in the northern South China Sea basin.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Environmental Sciences
Yanan Liu, Jingya Xue, Zhifan Gui, Lu Zhang, Xiaolong Yao
Summary: This study investigates the photoreactivity of dissolved organic matter (DOM) from different sources in the Lake Taihu basin. The results show that the original composition and sources of DOM are closely related to its photoreactivity. DOM from macrophytes releases soluble components under light exposure, while DOM with higher aromacity shows photobleaching effects and increased humification degree. Allochthonous anthropogenic DOM exhibits stronger photo-ammonification. The form of inorganic nutrient releases during DOM photolysis also varies with the original DOM sources.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Ecology
Katrin Attermeyer, Astrid Harjung, Jakob Schelker, Gabriele Weigelhofer
Summary: The hyporheic zone plays a crucial role in carbon processing in stream ecosystems, but the drivers of microbial activity and carbon processing in this zone are not well understood. Our experiments showed that algal dissolved organic matter and inorganic phosphorus have significant impacts on microbial degradation of soil DOM in the hyporheic zone, but the effects of nutrient availability may vary among different streams. This study highlights the importance of nutrient pulses in stimulating microbial activity and carbon degradation in pristine streams.
FRESHWATER BIOLOGY
(2022)
Article
Plant Sciences
Masahiro Ohtake, Noriaki Natori, Youta Sugai, Kenji Tsuchiya, Tsuyoshi Aketo, Gregory N. Nishihara, Tatsuki Toda
Article
Environmental Sciences
Mutsumi Sekine, Shinichi Akizuki, Masatoshi Kishi, Norio Kurosawa, Tatsuki Toda
Article
Environmental Sciences
Shinichi Akizuki, German Cuevas-Rodriguez, Tatsuki Toda
Summary: This study demonstrated the effectiveness of adding moving bed carriers in photobioreactors to mitigate light inhibition of nitrifiers in a consortium of microalgae and nitrifiers. The specific nitrification activity was significantly improved in the carrier-added photobioreactor compared to the one without carriers, due to the attenuation of incident light intensity by carriers.
Article
Biotechnology & Applied Microbiology
Jun Qian, Xin Liu, Syuhei Ban, Masaaki Fujiwara, Toshimitsu Kodera, Shinichi Akizuki, Tatsuki Toda
JOURNAL OF APPLIED PHYCOLOGY
(2020)
Article
Marine & Freshwater Biology
Masahiro Ohtake, Gregory N. Nishihara, Yukio Inoue, Kenji Tsuchiya, Tatsuki Toda
PHYCOLOGICAL RESEARCH
(2020)
Article
Biochemistry & Molecular Biology
Kento Nishi, Shinichi Akizuki, Tatsuki Toda, Tatsushi Matsuyama, Junichi Ida
PROCESS BIOCHEMISTRY
(2020)
Article
Environmental Sciences
Ndubuisi Samuel Iweh, Mitsuhiko Koyama, Shinichi Akizuki, Syuhei Ban, Tatsuki Toda
SCIENCE OF THE TOTAL ENVIRONMENT
(2020)
Article
Environmental Sciences
Masahiro Ohtake, Rikuya Kurita, Mizuki Tsunogai, Gregory N. Nishihara, Tatsuki Toda
Summary: Improved coastal management has led to phosphorus depletion in coastal environments, potentially impacting the abundance of macroalgae. Juveniles and mature individuals of the brown alga species Sargassum macrocarpum have different phosphorus storage capacities, with higher stored phosphorus content benefiting the growth rates of juveniles. The experiments suggest that individual alga can endure several months of phosphorus depletion due to their phosphorus storage capacity.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Ecology
Brian Wei Khong Chong, Sandric Chee Yew Leong, Victor S. Kuwahara, Teruaki Yoshida
REGIONAL STUDIES IN MARINE SCIENCE
(2020)
Article
Engineering, Marine
Fareha Hilaluddin, Fatimah Md. Yusoff, Tatsuki Toda
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2020)
Article
Biotechnology & Applied Microbiology
Masatoshi Kishi, Kenta Nagatsuka, Tatsuki Toda
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2020)
Article
Biotechnology & Applied Microbiology
Kenji Tanaka, Masatoshi Kishi, Hirut Assaye, Tatsuki Toda
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2020)
Article
Biotechnology & Applied Microbiology
Saki Tachihana, Norio Nagao, Tomoyo Katayama, Minamo Hirahara, Fatimah Md Yusoff, Sanjoy Banerjee, Mohamed Shariff, Norio Kurosawa, Tatsuki Toda, Ken Furuya
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2020)
Article
Ecology
Santha Devi Muthurajah, Sandric Chee Yew Leong, Victor S. Kuwahara, Pak Yan Moh, Othman Bin Haji Ross, Teruaki Yoshida
Summary: The study found significant seasonal and spatial variations in zooplankton communities in Sepanggar Bay, Malaysia, with a strong influence of monsoon. Zooplankton abundance varied across seasons, with copepods dominating the community structure.
REGIONAL STUDIES IN MARINE SCIENCE
(2021)
Review
Environmental Sciences
Emily Curren, Victor S. Kuwahara, Teruaki Yoshida, Sandric Chee Yew Leong
Summary: Microplastic pollution is a prevalent and serious problem in marine environments, impacting marine ecosystems and organisms. Research in Southeast Asia on this issue is limited, but studies show that fishing harbours, aquaculture farms, tourism, and improper waste disposal all contribute to the abundance of microplastics. Standardized protocols and quantification methods are needed for better monitoring and assessment.
ENVIRONMENTAL POLLUTION
(2021)
