Mercury concentrations in Baja California Sur fish: Dietary exposure assessment

Murillo-Cisneros, Daniela A.; Zenteno‐Savín, Tania; Harley, John R.; Cyr, Andrew; Hernández-Almaraz, Pablo; Gaxiola-Robles, Ramón; Galván‐Magaña, Felipe; O’Hara, Todd M.

doi:10.1016/j.chemosphere.2020.129233

Cited by 10 publications

(3 citation statements)

References 53 publications

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“…The presence of Hg in aquatic ecosystems is a global concern as it can be toxic even at low concentrations [66,67]. Hg is easily incorporated into trophic chains and can also be potentially toxic to humans through fish consumption [68][69][70]. In La Sabana, fishing is an important activity, with products being locally traded.…”

Section: Anthropogenic Alterations In La Sabana: Water Quality Heavy ...mentioning

confidence: 99%

Assessment of Water Quality and Heavy Metal Environmental Risk on the Peri-Urban Karst Tropical Lake La Sabana, Yucatán Peninsula

Cohuo

Moreno-López

Escamilla-Tut

et al. 2023

Water

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In the Yucatán Peninsula, anthropogenic activities such as urbanization and the final disposal of solids and wastewater critically impact aquatic systems. Here, we evaluated the anthropogenic-related environmental alteration of Lake La Sabana, located in the northern limits of one of the main cities of the Mexican Caribbean. We evaluated lake water quality, using physical, chemical, and microbiological indicators, and heavy metals in surficial sediment and fish tissue to evaluate the potential environmental risk. Multivariate analyses revealed that environmental conditions in La Sabana are spatially and temporally heterogeneous. Medium to bad water quality was determined within different basins by the National Sanitation Foundation water quality index, related to the degree of anthropogenic influence at each zone. The central-south zones displayed critical microbiological values largely exceeding national standards. Heavy metals in sediment and fish tissue such as Zn and Hg were relatively low, but Hg concentrations threaten the ecological environment. Incipient wastewater treatment and its final disposal in La Sabana are mainly responsible for the changes in the trophic status and availability of nutrients, which in turn may have promoted changes in the biological structure and aquatic plant invasions. Lake La Sabana can be considered a model of the potential and sequential effects of anthropogenic alterations in the oligotrophic karst tropical aquatic systems in the Yucatan Peninsula.

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Section: Anthropogenic Alterations In La Sabana: Water Quality Heavy ...mentioning

confidence: 99%

Assessment of Water Quality and Heavy Metal Environmental Risk on the Peri-Urban Karst Tropical Lake La Sabana, Yucatán Peninsula

Cohuo

Moreno-López

Escamilla-Tut

et al. 2023

Water

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“…The HQ for children and adults exceeded 1 for total seafood and fish. This was found even when the EWI MeHg did not exceed the TWI [99] Baja California Sur, Mexico Not all species with muscle concentrations exceeding the FS for mercury also lead to a HQ > 1 [100] Aracaju, Brazil Six out of 13 analysed species exceeded the 0.5 mg kg -1 and two species exceeding the 1 mg kg -1 FS for mercury. Only two species induced a HQ > 1 [101] Malaysia HQ Between 1.5 and 2.7 for urban and coastal rural women of childbearing age, respectively [102] Jeddah, Saudi Arabia Only one of the 13 samples fish species exceeded the 0.5 mg kg -1 FS for mercury.…”

Section: Zhoushan Chinamentioning

confidence: 93%

An approach to assessing subsea pipeline-associated mercury release into the North Sea and its potential environmental and human health impact

von Hellfeld,

Hastings

2024

R. Soc. Open Sci.

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Mercury is a naturally occurring heavy metal that has also been associated with anthropogenic sources such as cement production or hydrocarbon extraction. Mercury is a contaminant of concern as it can have a significant negative impact on organismal health when ingested. In aquatic environments, it bioaccumulates up the foodweb, where it then has the potential to impact human health. With the offshore hydrocarbon platforms in the North Sea nearing decommissioning, they must be assessed as a potential source for the environmental release of mercury. International treaties govern the handling of materials placed in the ocean. Studies have assessed the ecologic and economic benefits of (partial) in situ abandonment of the infrastructure as artificial reefs. This can be applied to pipelines after substantial cleaning to remove mercury accumulation from the inner surface. This work outlines the application of an approach to modelling marine mercury bioaccumulation for decommissioning scenarios in the North Sea. Here, in situ decommissioning of cleaned pipelines was unlikely to have a negative impact on the North Sea food web or human health. However, significant knowledge gaps have been determined, which must be addressed before all negative impacts on ecosystems and organismal health can be excluded.

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“…The presence of Hg in aquatic ecosystems is a global concern as it can be toxic even at low concentrations [66,67]. The Hg is easily incorporated into trophic chains and can also be potentially toxic to humans through fish consumption [68][69][70]. In La Sabana, fishing is an important activity, with products being locally traded.…”

Section: Anthropogenic Alterations In La Sabana: Water Quality Heavy ...mentioning

confidence: 99%

The Snowball Effect of Anthropogenic Alterations in a Karst Tropical Lake in Yucatán Peninsula, Environmental Variability and Risk Assessment

Cohuo¹,

Moreno²,

Escamilla³

et al. 2022

Preprint

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In the Yucatán Peninsula, anthropogenic activities such as urbanization and final dispose of solid and wastewaters critically impact aquatic systems. Here, we evaluated the anthropogenic-related environmental alteration of Lake La Sabana, located in the northern limit of one of the main cities of the Mexican Caribbean. We evaluate lake water quality using physical, chemical, and microbiological indicators, and heavy metals in surficial sediments and fish tissue to evaluate the potential environmental risk. Multivariate analyses reveal that environmental conditions in La Sabana are spatial and temporal heterogeneous. Medium to bad water quality was determined within basins by the NSFWQI, related with the degree of anthropogenic influence. The center-south zones display critical microbiological values largely exceeding national standards. Heavy metals in sediments (Zn&gt;Hg) and fish tissue (Hg) were relatively low, but Hg concentration threat the ecological environment. Incipient wastewater treatment and final dispose in La Sabana is the main responsible of changes in the trophic status and nutrients availability, which in turn may have promoted changes in the biological structure and aquatic plant invasions. Lake La Sabana can be considered a model of the potential sequential effects of the anthropogenic alterations in oligotrophic karts tropical aquatic systems in Yucatán Peninsula.

show abstract

Mercury concentrations in Baja California Sur fish: Dietary exposure assessment

Cited by 10 publications

References 53 publications

Assessment of Water Quality and Heavy Metal Environmental Risk on the Peri-Urban Karst Tropical Lake La Sabana, Yucatán Peninsula

Assessment of Water Quality and Heavy Metal Environmental Risk on the Peri-Urban Karst Tropical Lake La Sabana, Yucatán Peninsula

An approach to assessing subsea pipeline-associated mercury release into the North Sea and its potential environmental and human health impact

The Snowball Effect of Anthropogenic Alterations in a Karst Tropical Lake in Yucatán Peninsula, Environmental Variability and Risk Assessment

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