Article
Marine & Freshwater Biology
Kazuhiro Aoki, Yugo Shimizu, Toshihiro Yamamoto, Kazuki Yokouchi, Kaori Kishi, Hideyuki Akada, Hiroaki Kurogi
Summary: This study quantified the offshore-derived nutrient loading in a semienclosed bay and discussed its contribution to oligotrophication. It found a significant decadal change in the inward nutrient flux and suggested that the decrease in nutrient flux from offshore contributes to oligotrophication in Tokyo Bay.
ESTUARINE COASTAL AND SHELF SCIENCE
(2022)
Article
Biodiversity Conservation
Qi Yan, Tingting Cheng, Junting Song, Jin Zhou, Chin-Chang Hung, Zhonghua Cai
Summary: Shenzhen Bay, as a highly eutrophic area, is mainly influenced by internal nutrient loading which contributes 65% and 69% of total input fluxes of dissolved DIN and PO43--P. Sediment resuspension plays a significant role in providing nitrogen and bioavailable phosphate to the bay, while a considerable amount of DIN and PO43--P are exported through water exchange and residual flows into the Pearl River.
ECOLOGICAL INDICATORS
(2021)
Article
Biodiversity Conservation
Xiang Zhang, Jue Huang, Junjie Chen, Yongfang Zhao
Summary: Quantitative retrieval models of total suspended solids (TSS) concentrations based on Landsat and MODIS data were developed for Jiaozhou Bay. The reliability of the retrieved TSS concentrations was evaluated, and their temporal and spatial variations were analyzed. The main factors influencing the TSS concentration in Jiaozhou Bay were identified, with wind speed being the primary factor.
ECOLOGICAL INDICATORS
(2023)
Article
Environmental Sciences
Ashwin Singh, Manish Kumar
Summary: High nutrient loading discharge poses a threat to marine biota, with satellite observation aiding in understanding nutrient aggregation. Coccolithophore and chlorophyll can indicate nutrient inflow, while sea surface temperature correlates differently with phytoplankton during monsoon and pre-monsoon, showing ecological sensitivity and resilience of the Bay of Bengal compared to the Pacific Ocean.
MARINE POLLUTION BULLETIN
(2021)
Article
Environmental Sciences
Amy E. Grogan, Michael A. Mallin
Summary: Urban areas often pollute marine and estuarine waterways with stormwater runoff, threatening human health and local economies. The implementation of Best Management Practices, tailored to individual situations, can effectively reduce pollution levels in coastal waters. A study in Wrightsville Beach, North Carolina, USA, showed significant reductions in stormwater discharge and pollutant loading after the installation of a set of BMPs.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Environmental Sciences
Rushui Xiao, Guandong Gao, Dezhou Yang, Ying Su, Yang Ding, Rong Bi, Shibo Yan, Baoshu Yin, Shengkang Liang, Xianqing Lv
Summary: This study used a physical-biological model to investigate the mechanisms behind the variations in dissolved inorganic nitrogen, phosphorus, silicon, and chlorophyll-a in Jiaozhou Bay. The results show that physical processes increase nutrients, while biological processes reduce them. Exchange with the Yellow Sea plays a significant role in nutrient dynamics.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Wenfei Ni, Ming Li
Summary: Previous analysis revealed the correlation between the expansion of hypoxia in Chesapeake Bay and increased riverine nutrient loading, but the driving processes behind this hypoxia response remained unclear. Using a validated hydrodynamic-biogeochemical model, a simulation was conducted to examine dissolved oxygen levels during a 40-year period of increased nutrient loading. The model successfully reproduced the observed decline in oxygen concentration and expansion of hypoxic volume, with water column respiration identified as the dominant driver of hypoxia expansion.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Ali P. Yunus, Yoshifumi Masago, Yasuaki Hijioka
Summary: Water quality monitoring programs are widely implemented globally to monitor water quality and trends, but analyzing based on point-source field observations is challenging at large scales. This study used a Google Earth Engine algorithm to estimate TSS concentration in Chesapeake Bay using MODIS Terra imagery. Results showed a decreasing trend in TSS concentration over the past two decades, with major peak events coinciding with extreme weather events. The application complements existing monitoring programs to attain water quality standards.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Environmental Sciences
Vitor Hugo Neves, Giorgio Pace, Jesus Delegido, Sara C. Antunes
Summary: This study introduces the use of satellite data for assessing water quality in reservoirs to support effective and sustainable water management. Satellite remote sensing provides lower errors compared to in situ data, with some fine-tuning potentially required for improved accuracy.
Article
Water Resources
Adam G. Yates, Robert B. Brua, Arthur Friesen, Sharon Reedyk, Glenn Benoy
Summary: The study observed increasing concentrations, loads, and yields of TN, TP, and TSS at most river stations in the eastern half of the Lake Winnipeg Basin, while decreasing or stationary trends were seen in the western stations. Nutrient and suspended solid trends were closely related to discharge patterns, especially in the Red-Assiniboine subdrainage.
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
(2022)
Article
Environmental Sciences
Michaela L. de Melo, Marie-Laure Gerardin, Caroline Fink-Mercier, Paul A. del Giorgio
Summary: The Eastern James Bay has experienced significant changes in its physical, chemical, and ecological functioning due to climate and landscape changes as well as human intervention. Rivers play a crucial role in the Bay by delivering freshwater, key materials, and environmental signals. The study examines the spatial variability of riverine export fluxes and yields of various substances in the Eastern James Bay, identifying the main drivers of material concentrations and modeling their contribution to the regional budget. The findings highlight the impact of damming and climate change on water and material export from boreal rivers to the Bay.
Article
Environmental Sciences
Jiaxin Liu, Zhongfeng Qiu, Jiajun Feng, Ka Po Wong, Jin Yeu Tsou, Yu Wang, Yuanzhi Zhang
Summary: This study compared the performance of XGBoost and BPNN algorithms in estimating TSS and Chl-a levels in the Pearl River Estuary and its coastal waters. The XGBoost algorithm demonstrated better performance and was used to estimate TSS and Chl-a from 2000 to 2021. The results showed spatial and seasonal variations in TSS and Chl-a, with higher concentrations in the northwest and lower concentrations in the southeast. TSS and Chl-a concentrations around the Hong Kong-Zhuhai-Macao Bridge decreased over time, but there was an increase in TSS concentration in the upstream area of the west side.
Article
Marine & Freshwater Biology
Xiaodong Wang, Fengli Zhou, Qingling Wang, Shuaishuai Xu, Da Chen, Jie Chen, Yan Wang
Summary: Bloom of Phaeocystis globosa occurred in coastal waters of South China, and the structure and composition of their colonies were investigated. Giant colonies exhibited unique characteristics compared to previous observations. Colony size was positively correlated with colony cell and mucous carbon densities. Chlorophyll a concentrations per colonial cell decreased with increasing colony size. Intra-colony fluids had higher concentrations of nitrate, phosphate, and silicate, but lower concentrations of ammonium and nitrite compared to ambient seawater. The occurrence of blooms caused by giant P. globosa colonies may impact food web structures and carbon cycling in sub-tropical Chinese waters.
JOURNAL OF SEA RESEARCH
(2023)
Article
Ecology
Jenny Choo, Nagur Cherukuru, Eric Lehmann, Matt Paget, Aazani Mujahid, Patrick Martin, Moritz Muller
Summary: High-quality ocean colour observations are increasingly accessible and can be used to support water quality measurements. This paper presents a newly developed model for studying the dynamics of total suspended solids (TSS) along the southwest coast of Sarawak, Borneo using MODIS Aqua satellite data. The results show that TSS levels in this region are within local standards, but with significant variability, especially during monsoon periods.
Article
Fisheries
Hu He, Lei Zhang, Xiaoyu Ning, Zhigang Mao, Erik Jeppesen
Summary: Excessive nitrogen loading in summer can promote phytoplankton growth and increase algal turbidity. In eutrophic shallow lakes, increased algal production can also enhance the abundance of deposit-feeding tubificid worms, leading to sediment resuspension and non-algal turbidity. However, the effects of high nitrogen loading on this benthic process in eutrophic shallow lakes have been poorly studied.
KNOWLEDGE AND MANAGEMENT OF AQUATIC ECOSYSTEMS
(2023)
Article
Environmental Sciences
Atefeh Zendehboudi, Azam Mohammadi, Sina Dobaradaran, Gabriel E. De-la-Torre, Bahman Ramavandi, Seyed Enayat Hashemi, Reza Saeedi, Emran Moradpour Tayebi, Ahmad Vafaee, Amirhossein Darabi
Summary: This study investigated the characteristics and ecological risks of microplastics (MPs) in ballast water for the first time, and found high levels of MP pollution. These findings contribute to our understanding of the sources and risks of microplastics in marine ecosystems.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Rose Boahemaa Pinto, Linda Bogerd, Martine van der Ploeg, Kwame Duah, Remko Uijlenhoet, Tim H. M. van Emmerik
Summary: Catchment-scale plastic pollution assessments provide insights into the sources, sinks, and pathways of plastic pollution. We propose an approach to quantify macroplastic transport and density in the Odaw catchment, Ghana, and find that the urban riverine zone has the highest transport, while the urban tidal zone has the highest riverbank and land macroplastic density.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Aliya Baidourela, Qian Sun, Gongxin Yang, Umut Halik, Zhongkai Dong, Kaixu Cai, Guili Sun, Wenya Zhang, Sisi Cheng
Summary: The study focused on heavy metal pollution in the green vegetation of a suburban industrial area in Tuokexun County, Xinjiang, China. The results showed that the overall level of heavy metal pollution in the soil was minor, with mercury (Hg) being the most severe contamination, likely caused by human activities. The composition of heavy metal elements in trees was more stable compared to grass and shrubs, with varying concentrations across different vegetation. Shrubbery was found to be the most effective in heavy metal restoration, and there were disparities in heavy metal enrichment among different vegetation types.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
James H. Bridson, Hayden Masterton, Beatrix Theobald, Regis Risani, Fraser Doake, Jessica A. Wallbank, Stefan D. M. Maday, Gavin Lear, Robert Abbel, Dawn A. Smith, Joanne M. Kingsbury, Olga Pantos, Grant L. Northcott, Sally Gaw
Summary: Plastic pollution has significant environmental impacts, largely due to chemical additives. However, the behavior of plastic additives in marine environments is not well understood. A marine deployment experiment was conducted to investigate the effects of weathering on the extractables profile of four types of plastics in New Zealand over a period of nine months. The concentration of additives in polyethylene and oxo-degradable polyethylene was strongly influenced by artificial weathering, while polyamide 6 and polyethylene terephthalate showed minimal change. These findings emphasize the importance of considering leaching and weathering effects on plastic composition when assessing the potential impact and risk of plastic pollution in receiving environments.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Alan G. Scarlett, Francis D. Spilsbury, Steven J. Rowland, Marthe Monique Gagnon, Kliti Grice
Summary: This study used diamondoid hydrocarbon distributions to identify the sources of environmental oil contamination. A suite of 20 diamondoids was found to accumulate in fish adipose tissue. The scatter plots of indices between fish and exposure oils showed a close to ideal 1:1 relationship, which can be used to determine the origin of the oil.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Shan Jiang, Mengmeng Wan, Kun Lin, Yanshan Chen, Rui Wang, Liju Tan, Jiangtao Wang
Summary: In this study, the concentration, composition, distribution, and sources of PCBs in surface seawater of the Bohai Bay were analyzed. The results showed that PCBs in the Bohai Bay had high concentrations and were primarily derived from land-based sources such as port activities and river inputs. The PCBs in the Bohai Bay may come from commercial PCBs and their incineration products, municipal landfills, wood and coal combustion, and industrial activities, etc.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Icaro S. A. Porto, Saulo V. A. Dantas, Caio S. A. Felix, Francisco A. S. Cunha, Jailson B. de Andrade, Sergio L. C. Ferreira
Summary: This study evaluated the risks of mercury levels in sardines consumed by low-income population in Salvador, Brazil. The results showed that the mercury content in the sampled sardines posed no risks to human health. This study is significant as most sardines in Salvador come from Todos os Santos Bay, which has a history of mercury contamination.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Jiahui Chen, Chengyu Yuan, Guanqun Zhai, Guangcheng Chen, Heng Zhu, Jun Liu, Yong Ye
Summary: This study investigated the combined influences of species selection and site elevation on greenhouse gas fluxes from restored mangrove soils. The results suggest that Avicennia marina should be selected for mangrove restoration to minimize carbon release and reduce the influence of greenhouse gas fluxes on the global greenhouse effect.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Emmanuel Onyeabor, Uju Obuka
Summary: The Gulf of Guinea region in Africa is a significant area for coastal countries, playing a vital role in their economic and environmental development. This study aims to reduce marine plastic pollution in the region by utilizing legal instruments.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Yuanli Liu, Stephan Luttjohann, Alvise Vianello, Claudia Lorenz, Fan Liu, Jes Vollertsen
Summary: Large area attenuated total reflectance-Fourier transform infrared spectroscopy (LAATR-FTIR) is a novel technique for detecting small microplastics, with limited accuracy for large microplastics. However, it shows promise in homogeneous matrices. The spectra quality is comparable between transmission mode and LAATR mode.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Phuc T. D. Le, Andrew M. Fischer, Britta D. Hardesty, Heidi J. Auman, Chris Wilcox
Summary: This study explores the relationship between ocean currents and the accumulation of floating marine debris (FMD) and finds that higher concentrations of FMD are associated with frontal frequencies (FF). FMD is primarily trapped in accumulation zones between fronts and the coastline, which have high biodiversity value.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Rosa Sawan, Perine Doyen, Florence Viudes, Rachid Amara, Celine Mahfouz
Summary: Few studies have examined the impact of urbanization and meteorological events on microplastics discharged into the sea through rivers. Surface water samples were collected from two Lebanese rivers, with differing degrees of urbanization, during dry and wet periods. The results showed that the most industrialized river had a significantly higher abundance of microplastics compared to the less-industrialized river. There was also a correlation between particle contamination and the season at each site, with microplastic concentrations highest on the first day of the wet season. These findings highlight the importance of considering meteorological events in accurately assessing plastic pollution influx into coastal waters.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Katherine R. Shaw, Jonathan L. Whitney, Eileen M. Nalley, Madeline C. Schmidbauer, Megan J. Donahue, Jesse Black, Raquel N. Corniuk, Kellie Teague, Rachel Sandquist, Catherine Pirkle, Rachel Dacks, Max Sudnovsky, Jennifer M. Lynch
Summary: This study examines the ingestion of plastic in reef fish in the Republic of the Marshall Islands. Plastic particles were found in the gastrointestinal tracts of multiple fish species. However, further analysis revealed that these particles were actually natural materials and posed no threat to human consumers.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Revati Hardikar, C. K. Haridevi, Shantaj Deshbhratar
Summary: This study investigated the variability in phytoplankton functional structure using a trait-based approach and explored the relationship between species traits and environmental factors, as well as their impact on ecosystem functioning. The results revealed that morphological traits, temperature, and ammonia played a decisive role in the seasonal succession of phytoplankton species. It was found that certain traits favored higher biomass production but might hinder energy transfer efficiency. The strong correlation between environmental variables and phytoplankton functional structure supports the practical implementation of a trait-based approach in studying phytoplankton community dynamics under different environmental conditions.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Engki A. Kisnarti, Nining Sari Ningsih, Mutiara R. Putri, Nani Hendiarti, Bernhard Mayer
Summary: This study examines the movement patterns of plastic marine debris in Indonesian waters, revealing that Indonesia contributes significantly to transboundary marine debris in the Pacific Ocean, Indian Ocean, and the South China Sea. Most of the debris remains in Indonesian waters and moves back and forth due to the influence of monsoon currents.
MARINE POLLUTION BULLETIN
(2024)