Article
Environmental Sciences
Sara Packull-McCormick, Alicia Cowan, Ken D. Stark, Mike Low, Mary Gamberg, Heidi Swanson, Brian Laird
Summary: Indigenous communities in northern Canada rely on locally harvested traditional foods, including fish, which provides them with nutritional, cultural, and social benefits. However, mercury exposure from fish consumption can pose a health risk for populations that consume large amounts of fish with elevated mercury concentrations. This study examined mercury bioaccessibility in freshwater fish species and found significant differences in total mercury bioaccessibility among fish species and lakes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Radiology, Nuclear Medicine & Medical Imaging
Jason Nagels, Sida Wu, Dale Anderson, Kate Black, Vidas Nikolajevas, David Koff
Summary: With an increased number of healthcare providers involved in a patient's care, access to longitudinal imaging records becomes vital for treatment. This article explores three varieties of image exchange among providers and examines the adoption of clinical viewers and patient portals for improved healthcare delivery.
JOURNAL OF DIGITAL IMAGING
(2022)
Article
Environmental Sciences
Wolfgang Jansen
Summary: This study measured total mercury concentrations in lake sturgeon from five river systems in Manitoba, Canada. The concentrations were positively related to fish length and age, and the composition of fish diet was found to affect mercury concentrations. The study suggests that as lake sturgeon populations recover and harvest rates potentially increase, consumption of larger individuals should be limited.
ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
(2023)
Article
Environmental Sciences
Barbara Brodziak-Dopierala, Agnieszka Fischer
Summary: This study aimed to determine the content of Hg in fish intended for human consumption and purchased in Poland. The total Hg content of different species of marine and freshwater fish was analyzed. The highest concentration of Hg was found in tuna, which may pose a potential health risk for consumers.
Article
Immunology
Thomas N. Vilches, Kevin Zhang, Robert Van Exan, Joanne M. Langley, Seyed M. Moghadas
Summary: The study in Ontario, Canada, evaluated the impact of COVID-19 vaccination on reducing hospitalizations and deaths, showing significant reductions with Pfizer-BioNTech and Moderna vaccines. However, increasing daily contacts during vaccination campaigns could trigger a surge in outbreaks.
Article
Environmental Sciences
Noe Ferreira-Rodriguez, Antonio J. Castro, Beth N. Tweedy, Cristina Quintas-Soriano, Caryn C. Vaughn
Summary: The study explores the relationship between freshwater organisms, pollution, and public awareness, with a focus on the southeastern United States which is predicted to face high mercury stress. Results show varying perceptions of risk and willingness to adopt safe consumption habits, particularly among women of reproductive age, indicating the need for an adaptive strategy to confront mercury pollution in the region.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Public, Environmental & Occupational Health
Laura Albrecht, Kimberly A. Kaufeld
Summary: West Nile virus is a common mosquito-borne disease in North America that leads to viral encephalitis. Climate change plays a role in increasing the risk of human infections by affecting mosquito and bird populations.
FRONTIERS IN PUBLIC HEALTH
(2023)
Article
Environmental Sciences
Mariana Vezzone, Ricardo Cesar, Aline Serrano, Rodrigo Lourenco, Ana Paula Rodrigues, Zuleica Castilhos, Roberto Meigikos dos Anjos, Helena Polivanov
Summary: This study investigated the mercury concentrations in Rodrigo de Freitas Lagoon in Rio de Janeiro, Brazil to assess the ecological and human health risks associated with consuming contaminated fish. Sediments and fish samples were collected for mercury determination, and a model for estimating mercury in fish was evaluated. For human health risk assessment, the hazard quotient was calculated for fishermen and market consumers. The results showed high mercury concentrations in the northern section of the lagoon, posing a potential health hazard for fishermen but no risk for market consumers.
WATER AIR AND SOIL POLLUTION
(2023)
Article
Immunology
Alainna J. Jamal, Amna Faheem, Lubna Farooqi, Xi Zoe Zhong, Irene Armstrong, David A. Boyd, Emily Borgundvaag, Brenda L. Coleman, Karen Green, Kithsiri Jayasinghe, Jennie Johnstone, Kevin Katz, Philipp Kohler, Angel X. Li, Laura Mataseje, Roberto Melano, Matthew P. Muller, Michael R. Mulvey, Sarah Nayani, Samir N. Patel, Aimee Paterson, Susan Poutanen, Anu Rebbapragada, David Richardson, Alicia Sarabia, Shumona Shafinaz, Andrew E. Simor, Barbara M. Willey, Laura Wisely, Allison J. McGeer
Summary: The study found that 9% of household contacts were colonized with CPE, with 3% of cases attributed to household transmission. Household contacts were more likely to be colonized if they were the index case's spouse, if the index case remained CPE-colonized at household enrollment, or if they had at least one set of specimens processed after direct PCR was introduced.
CLINICAL INFECTIOUS DISEASES
(2021)
Article
Environmental Sciences
Phung Thi Vi, Nguyen Thuy Ngoc, Phan Dinh Quang, Nguyen Thanh Dam, Nguyen Minh Tue, Le Huu Tuyen, Pham Hung Viet, Duong Hong Anh
Summary: The accumulation profiles of nine PFASs were investigated in freshwater and marine fish species in Northern Vietnam. The highest concentration of PFASs was found in topmouth culter for freshwater fish and Asian sea bass for marine fish. The estimated dietary intake of PFASs from fish consumption indicated low exposure risks.
MARINE POLLUTION BULLETIN
(2022)
Article
Cardiac & Cardiovascular Systems
Gail E. Darling, Martin C. Tammemagi, Heidi Schmidt, Daniel N. Buchanan, Yvonne Leung, Caitlin McGarry, Linda Rabeneck
Summary: The pilot project in Ontario is the largest in Canada and meets the standards set by the International Agency for Research on Cancer for organized cancer screening. It successfully recruited high-risk individuals, had a high acceptance rate for smoking cessation programs, and showed a high detection rate for early-stage cancers.
ANNALS OF THORACIC SURGERY
(2021)
Article
Environmental Sciences
Bing Wu, Yingli Qu, Yifu Lu, Saisai Ji, Liang Ding, Zheng Li, Miao Zhang, Heng Gu, Qi Sun, Bo Ying, Feng Zhao, Xulin Zheng, Yidan Qiu, Zheng Zhang, Ying Zhu, Zhaojin Cao, Yuebin Lv, Xiaoming Shi
Summary: This study aimed to explore the effect of blood mercury (BHg) on the relationship between sea fish consumption frequency and tri-glyceride (TG) levels in Chinese adults. The results showed that sea fish consumption frequency was negatively associated with TG levels, while BHg levels were positively associated with TG levels. BHg levels mediated the association between sea fish consumption frequency and TG levels. These findings suggest that BHg may reduce the beneficial effect of sea fish consumption on TG levels.
ENVIRONMENTAL POLLUTION
(2022)
Article
Environmental Sciences
R. P. Mason, M. Coulibaly, G. Hansen, H. Inman, P. K. Myer, K. M. Yao
Summary: Artisanal and small-scale gold mining, energy production, and other industrial inputs are a major source of anthropogenic mercury in aquatic environments. This study focuses on the understudied estuarine waters of Cote d'Ivoire and suggests that the local population may be exposed to unsafe levels of methylmercury through fish consumption. The findings highlight the importance of addressing local sources of mercury contamination and the transportation of mercury used in gold mining activities.
Article
Geochemistry & Geophysics
Katia Jellicoe, Tyler J. Ciufo, Shoufa Lin, Natasha Wodicka, Nanping Wu, Patrick Mercier-Langevin, Chris Yakymchuk
Summary: The Island Gold deposit is a rare example of economic mineralization in the Wawa subprovince, with similar tectonic characteristics as the neighboring Abitibi subprovince. It is hosted in dacite, gabbro, and tonalite-trondhjemite, and associated with second-generation transpressional deformation. The age range of gold mineralization is similar to other events in the Wawa subprovince.
Article
Environmental Sciences
Muhammad Aamir Munir, Bushra Khan, Ishaq Ahmed Mian, Muhammad Rafiq, Samreen Shahzadi, Kashif Naeem, Iqbal Ahmad
Summary: Mercury bioaccumulation in fish and scalp hair was assessed in fishing communities along the river Swat in Pakistan. Significant differences were found in mercury concentrations between upstream and downstream fish and scalp hair. Health problems in the fishing community were attributed to mercury accumulation from fish consumption.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Fisheries
Chen Zhang, Michael T. Brett, Jens M. Nielsen, George B. Arhonditsis, Ashley P. Ballantyne, Jackie L. Carter, Jacob Kann, Dorthe C. Muller-Navarra, Daniel E. Schindler, Jason D. Stockwell, Monika Winder, David A. Beauchamp
Summary: Emerging evidence suggests that zooplankton production is affected by climate change and eutrophication, which could have broad implications for food-web dynamics and fisheries production. A resource-based model developed in this study shows that seasonal variation in resource availability and quality greatly influences zooplankton production, providing important insights for understanding the biophysical control of zooplankton under a changing climate.
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
(2022)
Article
Environmental Sciences
Lewis A. Molot, David C. Depew, Arthur Zastepa, George B. Arhonditsis, Susan B. Watson, Mark J. Verschoor
Summary: Studies suggest that high concentrations of nitrate can mitigate cyanobacteria populations in eutrophic systems and that reduced surficial sediments precede the formation of large cyanobacteria populations. Remedial improvements to wastewater treatment plant oxidation capacity may inadvertently contribute to high nitrate concentrations and thus mitigate cyanobacteria populations. Lowering nitrate concentrations could result in earlier formation of cyanobacteria populations in the summer.
JOURNAL OF GREAT LAKES RESEARCH
(2022)
Article
Ecology
Cindy Yang, George B. Arhonditsis
Summary: There is ambiguity around the importance of demographic and socio-economic characteristics in promoting pro-environmental behaviors. This study analyzed survey data from Canadians to identify reliable predictors of environmental attitudes, and found that individuals with higher education and income, as well as families with children, tend to display pro-environmental behaviors. Political conservatism is associated with reluctance to embrace some environmentally aligned behaviors, but there is no major conservative versus liberal divide on environmental issues. Ontario and British Columbia show a higher aptitude for sustainable living. The study also suggests that intentions to support emissions reduction and clean energy efforts are not always put into action.
ECOLOGICAL INFORMATICS
(2022)
Article
Environmental Sciences
Alexey Neumann, E. Agnes Blukacz-Richards, Ratnajit Saha, Carlos Alberto Arnillas, George B. Arhonditsis
Summary: This study examines the ability of a SPARROW-based model to assess regional P export coefficients for nutrient mitigation and watershed management. Multi-agency water quality data were collected to overcome limitations in monitoring stations. A Bayesian hierarchical framework was used to estimate nutrient loading during different flow regimes. Agriculture and urban runoff were identified as major non-point sources, with different contributions during dry and wet years. The study highlights the importance of mitigating urban non-point sources and controlling agricultural runoff.
JOURNAL OF GREAT LAKES RESEARCH
(2023)
Article
Engineering, Civil
Ali Saber, Vincent Y. S. Cheng, George B. Arhonditsis
Summary: Understanding the drivers of water level variability in large water bodies is crucial for developing proactive mitigation plans. By analyzing the influence of climate oscillations on Lake Huron-Michigan's water budget, it was found that these oscillations had a stronger impact on water levels after 1980. Furthermore, after removing atmospheric effects, changes were observed in runoff and river flow rates, indicating the effects of human activities on the regional water cycle.
JOURNAL OF HYDROLOGY
(2023)
Editorial Material
Ecology
George Arhonditsis
ECOLOGICAL INFORMATICS
(2022)
Article
Ecology
Felicity J. Ni, George B. Arhonditsis
Summary: Mercury (Hg) sequestration by phytoplankton and subsequent consumption by herbivorous zooplankton can mediate the transfer of mercury to higher trophic levels. This study introduces two prey species to a predator-prey system to investigate the effects of different prey items on zooplankton assemblages. The results show that the nutritional quality of prey is a major driver of predator-prey relationships, with higher nutritional quality leading to prey-dominated food webs. The study also suggests that the homeostatic rigidity of the predator can help cope with toxic exposure.
ECOLOGICAL INFORMATICS
(2023)
Article
Environmental Sciences
Yuko Shimoda, Haibin Cai, Yasasi Fernando, Akunne Okoli, Zhuowei Xu, Marten Koops, Timothy B. Johnson, George B. Arhonditsis
Summary: Food web theory predicts that oligotrophication can lead to a decline in fisheries, but emerging evidence suggests that more complex trophic interactions can lead to ecosystem responses that deviate from theoretical predictions, especially in shallow littoral zones. Two end-to-end modelling strategies were used in this study to characterize potential food web structural shifts and overall ecosystem productivity in response to oligotrophication. The analysis suggests that reduction in phosphorus levels may not necessarily trigger a significant decline in fish biomass in the studied bay.
JOURNAL OF GREAT LAKES RESEARCH
(2023)
Article
Environmental Sciences
Carlos Alberto Arnillas, Roya Abedi, Camilla Parzanini, Ursula Strandberg, Michael T. Arts, Satyendra P. Bhavsar, George B. Arhonditsis
Summary: We investigated the relationship between biochemical and morphometric traits in sixteen fish species from the Canadian waters of the Laurentian Great Lakes. The study focused on the correlations between fish length, condition factor, lipid content, and polyunsaturated fatty acid (PUFA) composition in the dorsal muscle tissue. Linear relationships were found to be better representations of the correlations. Interspecific and among lakes differences accounted for most of the variability in fatty acid composition.
JOURNAL OF GREAT LAKES RESEARCH
(2023)
Article
Biology
A. O. Achieng, G. B. Arhonditsis, N. Mandrak, C. Febria, B. Opaa, T. J. Coffey, F. O. Masese, K. Irvine, Z. M. Ajode, K. Obiero, J. E. Barasa, B. Kaunda-Arara
Summary: Africa is facing extensive biodiversity loss due to environmental changes, lack of data and resources, as well as insufficient capacity to implement conservation measures. The lack of harmonized indicators and databases further hinders effective policies and monitoring. The article emphasizes the importance of establishing monitoring programs to inform evidence-based decisions for ecosystem conservation and restoration in Africa.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2023)
Article
Ecology
Amanda L. L. Loder, Sophia A. A. Zamaria, George B. B. Arhonditsis, Sarah A. A. Finkelstein
Summary: Freshwater marsh restoration is a potential natural climate solution, but the preservation of organic carbon in marsh soils over policy-relevant timescales is uncertain. Comparative analysis of undrained reference marsh, passively restored marsh, and actively restored marshes in Canada showed that the reference site had the highest organic carbon accumulation and mass, while restored wetlands had variable organic carbon masses. Passive restoration generated high rates of organic carbon accumulation in low-lying sites with appropriate substrate and hydrology. Active restoration measures may promote organic carbon preservation, especially in fine-grained soil. The selection of restoration sites should consider substrate, topographic gradient, and hydrology for maximizing carbon sequestration.
RESTORATION ECOLOGY
(2023)
Article
Environmental Sciences
Ursula Strandberg, George Arhonditsis, Petri Kesti, Jussi Vesterinen, Jussi S. Vesamaeki, Sami J. Taipale, Paula Kankaala
Summary: Shallow littoral areas in lakes are important habitats for diverse invertebrate and vertebrate species, and their abundance, diversity, and nutritional quality are influenced by various environmental factors. Lake typology, habitat, water chemistry, and latitude all play a significant role in determining the taxon richness, abundance, and content of polyunsaturated fatty acids (PUFAs) in littoral macroinvertebrate communities. Understanding these relationships is crucial for maintaining the ecological balance and functioning of lakes.
Editorial Material
Ecology
Falk Huettmann, George Arhonditsis
ECOLOGICAL INFORMATICS
(2023)
Article
Ecology
Haibin Cai, Yuko Shimoda, Jingqiao Mao, George B. Arhonditsis
Summary: With the development of computational power, complex mathematical models have been developed to explicitly represent the functional diversity of biotic communities and multiple biogeochemical cycles. In this study, a novel multi-pronged sensitivity analysis (SA) framework was proposed, integrating advanced statistical and machine learning techniques. The framework was applied to examine competition patterns and structural shifts among multiple functional phytoplankton and zooplankton groups in a complex aquatic biogeochemical model. The results showed the influential parameters for recreating plankton community dynamics during different seasons, and discussed the importance of ML-based SA framework in understanding parametric interactions in complex mathematical models.
ECOLOGICAL INFORMATICS
(2023)
Article
Engineering, Civil
M. Georgina Kaltenecker, Carl P. J. Mitchell, E. Todd Howell, George Arhonditsis
Summary: The shape and evolution of a concentration-discharge (C-Q) relationship can provide valuable insights into hydrological pathways, biogeochemical production and uptake, and the impact of catchment characteristics on export dynamics. This study uses statistical models to establish linkages between watershed attributes and water quality constituents in Ontario, Canada. The results reveal enriching behavior for several constituents, while others show source limitation or dilution patterns. The study highlights the interplay between anthropogenic stressors and biogeochemical processes, which is crucial for understanding nonpoint-source pollution.
JOURNAL OF HYDROLOGY
(2023)