Results 41 to 50 of about 12,925 (176)

Illegal Gold Mining in the Brazilian Amazon: Environmental Degradation in Yanomami Indigenous Lands, and Regulatory Failures

Sustainable Development, EarlyView.
ABSTRACT Illegal gold mining has emerged as a major sustainability threat in the Amazon, eroding Indigenous rights, forest integrity, and climate mitigation efforts. This study examines how international market incentives relate to the expansion of illegal mining and associated deforestation within the Yanomami Indigenous Territory (YIT) from 2008 to ...
Shirléia Lago Santos, Ana Claudia de Araujo Moxotó, Jurandir Moura Dutra   +2 more
wiley   +1 more source

Mercury-selenium relationships in liver of Guiana dolphin: the possible role of Kupffer cells in the detoxification process by tiemannite formation. [PDF]

PLoS ONE, 2012
Top marine predators present high mercury concentrations in their tissues as consequence of biomagnification of the most toxic form of this metal, methylmercury (MeHg).
José Lailson-Brito, Renato Cruz, Paulo Renato Dorneles, Leonardo Andrade, Alexandre de Freitas Azevedo, Ana Bernadete Fragoso, Lara Gama Vidal, Marianna Badini Costa, Tatiana Lemos Bisi, Ronaldo Almeida, Dario Pires Carvalho, Wanderley Rodrigues Bastos, Olaf Malm   +12 more
doaj   +1 more source

Organic and Inorganic Pollutants, Oxidative Stress Biomarkers, and Electrophoretic Protein Profiles in an Endangered Thresher Shark (Alopias vulpinus) From Southeastern Brazil: A Case Study

Environmental Toxicology, EarlyView.
ABSTRACT A comprehensive screening of different environmental contaminants (total metals, thermostable metal fractions associated with detoxification, and persistent organic pollutants) was conducted in an endangered common thresher shark (Alopias vulpinus ) individual incidentally captured in southeastern Brazil.
Sidney Fernandes Sales Junior, Amanda Pontes Lopes, Heloíse Martins de Souza, Regina Fonseca, Enrico Mendes Saggioro, Francielli Monteiro Casanova, Kamila Cezar Gramlich, Tatiana Dillenburg Saint'Pierre, Carlos German Massone, Renato Carreira, Rachel Ann Hauser‐Davis   +10 more
wiley   +1 more source

Environmental Contaminant Accumulation in Freshwater Turtles Inhabiting Three Rivers of the Permian Basin, New Mexico, USA

Environmental Toxicology, EarlyView.
ABSTRACT Freshwater turtles are valuable sentinels of aquatic systems due to their long lifespans and resilience in environments impacted by contaminants. The Permian Basin, dominated by the oil and gas sector, spans western Texas and southeastern New Mexico, USA, including the Pecos River and its tributaries, the Delaware and Black Rivers.
Ana G. G. Sapp, W. Gregory Cope, Christopher E. Moorman, Frank X. Weber, Ivana Mali   +4 more
wiley   +1 more source

Ecotoxicology of Methylmercury: A Transdisciplinary Challenge [PDF]

EcoHealth, 2008
Many of us vividly recall the devastating effects of point source mercury (Hg) pollution in Minimata Bay, Japan, documented by poignant photos of mothers caring for their children afflicted with crippling deformities. From 1952 to 1968, mercury waste from the production of acetaldehyde and vinyl chloride was discharged (200–600 tons) into Minimata Bay.
Celia, Chen, Bruce A, Wilcox
openaire   +2 more sources

Climate-driven sulfate export in alpine watersheds may stimulate methylmercury production

Environmental Research Letters
Climate change is increasing sulfate export and changing wetland extent in mountain regions. These changes may increase microbially mediated production of the neurotoxic substance methylmercury due to enhanced sulfate metabolism in mountain environments.
Hannah R Miller, Charles T Driscoll, Sarah E Janssen, Eve-Lyn S Hinckley   +3 more
doaj   +1 more source

Species-specific mercury speciation in billfishes and its implications for food safety monitoring and dietary advice

Environment International
Humans are exposed to toxic methylmercury mainly by consuming marine fish, in particular top predator species like billfishes or tunas. In seafood risk assessments, mercury is assumed to be mostly present as organic methylmercury in predatory fishes; yet
Anaïs Médieu, David Point, Valérie Allain, Nathalie Bodin, Mélanie Lemire, Pierre Ayotte, Zahirah Dhurmeea, Matthieu Waeles, Laure Laffont, Antoine Le Gohalen, François Roupsard, Anne Lorrain   +11 more
doaj   +1 more source

Recognizing and Preventing Overexposure to Methylmercury from Fish and Seafood Consumption: Information for Physicians

Journal of Toxicology, 2011
Fish is a valuable source of nutrition, and many people would benefit from eating fish regularly. But some people eat a lot of fish, every day or several meals per week, and thus can run a significant risk of overexposure to methylmercury. Current advice
Susan M. Silbernagel, David O. Carpenter, Steven G. Gilbert, Michael Gochfeld, Edward Groth, Jane M. Hightower, Frederick M. Schiavone   +6 more
doaj   +1 more source

Experimental Evidence for Mobilization of Mercury From the Eggshell by the Developing Embryo in an Avian Model Organism

Environmental Toxicology, EarlyView.
ABSTRACT Of the many pollutants wildlife is exposed to, mercury ranks among the most toxic. In birds, mercury does not only accumulate within generations, but also is transferred across generations via maternal offloading in eggs, with higher mercury concentrations found in shells of unhatched eggs.
Matteo Beccardi, Justine Bertram, Sandra Bouwhuis, Pablo Salmón, Peter J. Schupp, Oscar Vedder   +5 more
wiley   +1 more source

Ecotoxicological Assessment of Mercury in Fish From a Gold‐Mining‐Impacted Amazonian River: Biomonitoring and Human Health Risk

Environmental Toxicology, EarlyView.
ABSTRACT The Peixoto de Azevedo River, located in northern Mato Grosso, southern Brazilian Amazon, has a long history of artisanal and small‐scale gold mining (ASGM). This study evaluated total mercury (THg) concentrations in fish tissues to assess biomagnification and potential risks.
Augusto Cesar da Costa Castilho, Kleber Solera, Vinícius José Santos Lopes, Gleyce Alves Machado, Ricardo Lopes Tortorela de Andrade, Leandro Dênis Battirola   +5 more
wiley   +1 more source