Article
Engineering, Environmental
Zhenwei Yan, Yu Xin, Xiaosong Zhong, Yuanbi Yi, Penghui Li, Yuntao Wang, Yuping Zhou, Youping Zhou, Chen He, Quan Shi, Ding He
Summary: This study examined the cycling of dissolved organic nitrogen (DON) in the Bohai Sea and Yellow Sea in northern China. The results showed that the Yellow Sea had a stronger exchange with the open ocean, resulting in lower DON concentrations, while the Bohai Sea had a weaker exchange, leading to higher DON concentrations. Furthermore, this study discovered the molecular modifications in DON cycling.
Review
Astronomy & Astrophysics
Katye E. Altieri, Sarah E. Fawcett, Meredith G. Hastings
Summary: The budget of reactive nitrogen has doubled since the preindustrial era due to human activities, causing detrimental effects on ecosystems. The impact of excess nitrogen on the open ocean is not well understood. It is challenging to trace the origin of nitrogen deposition in the ocean.
ANNUAL REVIEW OF EARTH AND PLANETARY SCIENCES, VOL 49, 2021
(2021)
Article
Limnology
Megan E. Duffy, Jacquelyn A. Neibauer, Jamee Adams, Rachel A. Lundeen, Gabrielle Rocap, Anitra E. Ingalls, Clara A. Fuchsman, Richard G. Keil
Summary: This study identified peptides in suspended and sinking particles from the oxygen-deficient zone in the eastern tropical North Pacific and in a culture of the cyanobacterium Prochlorococcus using a de novo-discovery approach. The results show that de novo peptides are taxonomically specific and can enhance database-driven methods. The analysis of the particles also revealed the presence of fungal proteins in deep sinking particles, suggesting the important role of fungi in marine organic matter cycling. Additionally, observations were made on the post-translationally modified cyanobacterial peptides in the sediment trap sample, indicating the association between cellular location and early preservation in the detrital pool. The presence of modified amino acids in sinking and suspended particles suggests that extracellular protein degradation contributes to the pools of refractory organic nitrogen.
LIMNOLOGY AND OCEANOGRAPHY
(2022)
Article
Environmental Sciences
J. I. Czarnecki, D. F. Levia, J. R. Scudlark, T. Ouyang, A. S. Wozniak
Summary: Changes in anthropogenic activities have affected the speciation and concentration of reactive nitrogen delivered to coastal and oceanic waters through precipitation. However, the knowledge about dissolved organic nitrogen (DON) in rainwater is limited, despite its importance and potential contributions to primary and secondary production. A study in Delaware, USA, found a decrease in rainwater nitrogen and carbon amounts between 1994 and 2019, with the major reduction observed for nitrate. Season, airmass back trajectory, rainfall amount, and meteorology influenced the amounts of nitrogen. DON had different seasonal patterns compared to inorganic nitrogen and dissolved organic carbon, suggesting a biological source. The findings highlight the dynamic nature of atmospheric fluxes and the need for reevaluating models of atmospheric deposition to accurately assess inputs from changing atmospheric sources.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2023)
Article
Environmental Sciences
Christopher T. Whitney, Wilfred M. Wollheim, Arthur J. Gold, Joshua M. Buonpane
Summary: This study conducted an N mass balance in eight small reservoirs in coastal New England over annual time periods, considering both inorganic and organic forms of N. It found that small reservoirs have high capacity for dissolved inorganic N retention during low and moderate discharge, but are roughly in balance for DIN at higher discharge. Dissolved organic N was also evident during low flow late in the warm season. These findings highlight the importance of considering the transformations between inorganic and organic N when evaluating the effect of small reservoirs on TDN fluxes over seasonal and annual timescales.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2023)
Article
Biochemistry & Molecular Biology
Matthias C. Rillig, Eva Leifheit, Johannes Lehmann
Summary: Microplastics (MPs), plastic particles smaller than 5 mm, are widely present in the environment, with research focusing on their effects on soil biota and carbon cycle. Uncertainty exists regarding the impacts of nano-sized plastic particles.
Article
Environmental Sciences
Shi-Hai Mao, Guang-Chao Zhuang, Xin-Wei Liu, Na Jin, Hong-Hai Zhang, Andrew Montgomery, Xi-Ting Liu, Gui-Peng Yang
Summary: Dimethylated sulfur compounds, such as DMS, DMSP, and DMSO, play a crucial role in the global sulfur cycle, with their seasonality largely driven by biomass abundance and phytoplankton communities, and the spring maximum attributed to algal bloom. The sea-to-air fluxes of DMS also vary significantly between seasons, highlighting the need to consider specific blooms and seasonal uncertainties for accurate estimation of global DMS emissions.
MARINE POLLUTION BULLETIN
(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
Menghan Wang, Fucui Li, Lili Dong, Xiang Wang, Liebao Han, Jurgen E. Olesen
Summary: Increases in nitrogen deposition have the potential to impact the organic carbon cycle in soil. The effects of nitrogen addition on soil organic carbon pools are inconsistent, highlighting the need for quantifying the response of organic carbon pool distribution to nitrogen addition. Furthermore, the influence of adding a mixture of organic and inorganic nitrogen on organic carbon pool distribution and stabilization in grassland soil remains unclear.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Review
Oceanography
Ribanna Dittrich, Sian F. Henley, Hugh W. Ducklow, Michael P. Meredith
Summary: The cycling of dissolved organic matter in the productive west Antarctic Peninsula (WAP) region is not well understood. This study collected biogeochemical measurements along the WAP shelf and found that concentrations of dissolved organic carbon (DOC) and nitrogen (DON) in the upper ocean were lower than in lower latitudes. High variability of DON and intense nitrification were observed, suggesting intense upper ocean cycling of organic matter. Samples from glacial melt areas showed increased DON concentrations, indicating that warming and melting of Antarctic glaciers may lead to higher concentrations of dissolved organic matter.
PROGRESS IN OCEANOGRAPHY
(2022)
Article
Environmental Sciences
Xiaosong Zhong, Maojun Yan, Wenqi Xu, Zhenwei Yan, Feng Xu, Shuhang Dong, Yu Xin, Xiaoyong Shi
Summary: Dissolved organic nitrogen (DON) is an essential component of marine nitrogen cycling, but studying its dynamics is challenging due to anthropogenic impacts and physical/biochemical gradients. This study focuses on the Changjiang Estuary and the East China Sea to investigate DON cycling using multiple isotopes and concentration data. The results reveal the active production and consumption of DON in specific zones.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Environmental Sciences
Hans Frederik Engvej Hansen, Bo Elberling
Summary: The study found that Arctic permafrost contains bioavailable inorganic nitrogen, with significantly higher concentrations of NH4+ in the upper permafrost compared to the root zone. The release of inorganic nitrogen from permafrost thawing was calculated to be on the same order of magnitude as biological nitrogen fixation in relatively dry tundra ecosystems and less significant in wet ecosystems.
GLOBAL BIOGEOCHEMICAL CYCLES
(2023)
Article
Oceanography
Emil De Borger, Ulrike Braeckman, Karline Soetaert
Summary: The study found that there were no major differences in biogeochemical characteristics along the North Sea transect, but total carbon mineralization rates decreased significantly northward.
CONTINENTAL SHELF RESEARCH
(2021)
Article
Environmental Sciences
Scott F. Jones, Charles A. Schutte, Brian J. Roberts, Karen M. Thorne
Summary: The study examined the influence of wetland management history on ecosystem structure and nutrient cycling in Suisun Marsh, California, finding that water management exerted stronger control on ecosystem processes and structure than surface fire disturbance. Despite differences in predisturbance conditions, all soil processes recovered to baseline levels within 6 months after the fire, with no evidence of plant community change 1 year later.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Limnology
Serena Albert, Stefano Bonaglia, Nellie Stjarnkvist, Monika Winder, Bo Thamdrup, Francisco J. A. Nascimento
Summary: This study investigates the impact of different seasonal, quality, and quantity of plankton communities on benthic metabolism. The results show that the quality of organic matter is crucial in determining the fate of organic nitrogen once it settles to the sediment surface, with N-rich plankton deposition favoring nutrient cycling over N-loss via denitrification. This highlights the complex interplay between quantity and quality of organic matter in regulating nitrogen cycling.
LIMNOLOGY AND OCEANOGRAPHY
(2021)
Article
Environmental Sciences
Sadeq Abullah Abdo Alkhadher, Mohamad Pauzi Zakaria, Fatimah Md Yusoff, Narayanan Kannan, Suhaimi Suratman, Sami Muhsen Magam, Najat Masood, Mehrzad Keshavarzifard, Vahab Vaezzadeh, Muhamad Shirwan Abdullah Sani
ENVIRONMENTAL FORENSICS
(2016)
Article
Environmental Sciences
Shoffian Amin Jaafar, Mohd Talib Latif, Intan Suraya Razak, Muhammad Zulhilmi Shaharudin, Md Firoz Khan, Nurul Bahiyah Abd Wahid, Suhaimi Suratman
MARINE POLLUTION BULLETIN
(2016)
Article
Multidisciplinary Sciences
Izyan Munirah M. Zaideen, Suhaimi Suratman, Norhayati Mohd Tahir
Article
Multidisciplinary Sciences
Suhaimi Suratman, Nur Hayati Che Zan, Azyyati Abdul Aziz, Norhayati Mohd Tahir
Article
Environmental Sciences
Nurul Bahiyah Abd Wahid, Mohd Talib Latif, Suhaimi Suratman
AIR QUALITY ATMOSPHERE AND HEALTH
(2017)
Article
Environmental Sciences
Suhana Shaharom, Mohd Talib Latif, Md Firoz Khan, Siti Norbalqis Mohd Yusof, Nor Azura Sulong, Nurul Bahiyah Abd Wahid, Royston Uning, Suhaimi Suratman
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2018)
Article
Multidisciplinary Sciences
Suhaimi Suratman, Azyyati Abdul Aziz, Norhayati Mohd Tahir, Lee Hin Lee
Article
Multidisciplinary Sciences
Yet Yin Hee, Suhaimi Suratman, Norhayati Mohd Tahir, Timothy Jickells
Article
Ecology
Tiziana Luisetti, R. Kerry Turner, Julian E. Andrews, Timothy D. Jickells, Silke Kroger, Markus Diesing, Lucille Paltriguera, Martin T. Johnson, Eleanor R. Parker, Dorothee C. E. Bakker, Keith Weston
ECOSYSTEM SERVICES
(2019)
Article
Marine & Freshwater Biology
Yet Yin Hee, Suhaimi Suratman, Keith Weston
ESTUARINE COASTAL AND SHELF SCIENCE
(2020)
Article
Biochemistry & Molecular Biology
Royston Uning, Fatin Adlina Md Nasir, Suhaimi Suratman
Summary: The study revealed that heavy metals in Lake Kenyir mainly come from anthropogenic activities, and most of the heavy metals show increasing concentrations with depth. However, the dissolved heavy metal levels in Lake Kenyir are lower compared to other study areas.
ORIENTAL JOURNAL OF CHEMISTRY
(2021)
Article
Food Science & Technology
Yet Yin Hee, Keith Weston, Suhaimi Suratman
Summary: This study quantified and characterized the production of microplastics from storage and washing of commonly used food and drink containers in eat-in and takeaway catering. All treatments resulted in microplastic production, including plastics used for container production and additional types of microplastics. The use of hot treatment and repeated washing increased microplastic production. Based on the measurements in this study, the estimated annual microplastic ingestion from takeaway and eat-in food and drink storage in Southeast Asian countries is significant.
FOOD PACKAGING AND SHELF LIFE
(2022)
Article
Biochemistry & Molecular Biology
Suhaimi Suratman, Edmand Bedurus, Tan Hock Seng
ORIENTAL JOURNAL OF CHEMISTRY
(2017)
Article
Water Resources
Hidayah Manan, Julia Hwei Zhong Moh, Nor Azman Kasan, Suhaimi Suratman, Mhd Ikhwanuddin
APPLIED WATER SCIENCE
(2017)
Article
Multidisciplinary Sciences
S. Suratman, A. N. A. R. Hussein, N. Mohd Tahir, M. T. Latif, R. Mostapa, K. Weston