Anthropogenic influence on the sediment chemistry and diatom assemblages of Balamtetik Lake, Chiapas, Mexico

Caballero, Margarita; Mora, Lucy; Muñoz, E F Jaime; Escolero, Óscar; Bonifaz, R.; Ruiz, Carolina Martínez; Prado, Blanca

doi:10.1007/s11356-019-04581-9

Cited by 16 publications

(9 citation statements)

References 24 publications

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“…The anthropogenic impacts supplying agricultural fertilizers and urban wastewater to the lakes since the early 1950s drove the lakes' eutrophication [25,54]. Some authors [24,53] reported high nutrient, Chl-a, seston, and particulate organic carbon concentrations in the impacted/eutrophic lakes.…”

Section: Discussionmentioning

confidence: 99%

“…Since 2003, this originally pristine lake district has displayed signs of eutrophication on some lakes of the NW (e.g., Laguna Vuelta de Agua), changing from crystal clear blue to turbid green waters, with the occurrence of a yellowish-green supernatant, fetid odors, and fish mortality [24]. Moreover, [25] revealed paleolimnological evidence of deforestation and wastewater input from the Río Grande de Comitán since the 1950s, with particular intense anthropic disturbance from the 1980s until the 2000s. As a result of anthropic activities, lakes on the NW plateau are eutrophic, while the SE mountain lakes remain oligotrophic.…”

Section: Introductionmentioning

confidence: 99%

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Microcrustacean (Cladocera and Copepoda) Assemblages of a Tropical Karst Lake District

2022

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The taxonomic richness, composition, abundance, and biomass of pelagic microcrustaceans (Cladocera and Copepoda) were determined in 17 lakes of the “Lagunas de Montebello” National Park, a karst lake district in Chiapas State, southeast Mexico. The selected aquatic bodies exemplify the lake diversity in the area, which displays an anthropic impact gradient from impacted/eutrophic lakes on the NW to non-impacted/oligotrophic lakes on the SE. Sampling was conducted in two contrasting climatic periods: warm-rainy and cold-dry seasons. There were 32 taxa, five calanoid copepods, 16 cyclopoid copepods, and 11 cladocerans. The highest taxonomic richness, abundance, and biomass were found in the impacted/eutrophic lakes and the lowest in the non-impacted/oligotrophic lakes. Nauplii and copepods were the most abundant, while the copepods provided the largest biomass. Small-sized individuals composed the most significant abundance and biomass in impacted/eutrophic lakes, while large-sized individuals in the non-impacted/oligotrophic lakes. Even though the studied lakes belong to the same lake district, they showed low taxonomic similarity. Not a single taxon was found in all lakes; the most distributed taxa (13–14 lakes) were Mastigodiaptomus nesus and Leptodiaptomus cuauhtemoci, while 15 taxa (47%) were found in only 1–3 lakes. This karst lake district showed a great regional microcrustacean taxonomic richness but a great singularity level in each lake.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microcrustacean (Cladocera and Copepoda) Assemblages of a Tropical Karst Lake District

2022

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“…Conversely, the attribution of a peak to the Chernobyl fallout should be avoided without clear isotopic evidence (e.g., plutonium isotopes), as the associated fallout was not observed in a vast region that extends from the Ural Mountains/eastern Turkey to China. For example, in a lacustrine sediment core collected in Mexico, the occurrence of 137 Cs was attributed to both the Chernobyl (Méndez-García et al, 2014) and Fukushima accidents (Caballero et al, 2020). This remains to be confirmed as other studies conducted nearby did not record these 137 Cs sources.…”

Section: Limitations Of the Currently Published 137 Cs Researchmentioning

confidence: 90%

A worldwide meta-analysis (1977–2020) of sediment core dating using fallout radionuclides including 137Cs and 210Pbxs

Foucher

Chaboche

Sabatier

et al. 2021

Earth Syst. Sci. Data

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Abstract. Dating recent sediment archives (< 150 years) constitutes a prerequisite for environmental and climatic reconstructions. Radiocaesium (137Cs) emitted during thermonuclear bomb testing (∼ 1950–1980) and nuclear accidents and the decrease in excess lead-210 (210Pbxs) with depth are often combined to establish sediment core chronology. Although these methods have been widely used during the last several decades, there is a lack of structured and comprehensive worldwide synthesis of fallout radionuclide analyses used for dating sediment cores in environmental and Earth sciences. The current literature overview was based on the compilation of 573 articles published between 1977 and 2020, reporting the collection of 1351 individual dating sediment cores (the dataset can be accessed at https://doi.org/10.1594/PANGAEA.931493; Foucher et al., 2021). This review was conducted in order to map the locations where 137Cs fallout events were detected. These included the thermonuclear bomb testing peak in 1963, the Chernobyl accident in 1986, the Fukushima accident in 2011, and 24 additional events identified at 112 sites that led to local or regional radioactive releases (e.g., Sellafield accidents, Chinese nuclear tests). When 210Pbxs records were used along with 137Cs data, detailed information on the 210Pbxs age–depth models were also synthesized. With the current growing number of studies analyzing sediment cores and the increasing interest in the deployment of sediment fingerprinting techniques including radionuclides as potential discriminant properties, this spatialized synthesis provides a unique worldwide compilation for characterizing fallout radionuclide sources and levels at the global scale. This synthesis provides in particular a reference of 137Cs peak attribution for improving the sediment core dating, and it outlines the main questions that deserve attention in future research as well as the regions where additional 137Cs fallout investigations should be conducted in priority.

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“…On the contrary, the attribution of a peak to the Chernobyl fallout should be avoided without clear isotopic evidence, as the associated fallout was not observed in a vast region that extends from the Ural Mountains/Eastern Turkey to China. For example, in a lacustrine sediment core collected in Mexico, 365 the occurrence of 137 Cs was attributed to both Chernobyl (Méndez-García et al, 2014) and Fukushima accidents (Caballero et al, 2020). This remains to be confirmed as other studies conducted nearby these areas did not record these 137 Cs sources.…”

Section: Limitations Of the Currently Published 137 Cs Researchmentioning

confidence: 93%

A worldwide meta-analysis (1977–2020) of sediment core dating using fallout radionuclides including 137Cs and 210Pbxs

Foucher

Chaboche

Sabatier

et al. 2021

Preprint

View full text Add to dashboard Cite

Abstract. Dating recent sediment archives (< 150 years) constitutes a prerequisite for environmental and climatic reconstructions. Radiocaesium (137Cs) emitted during thermonuclear bomb testing (~1950 ̶ 1980) and nuclear accidents, as well as the decrease of excess lead-210 (210Pbxs) with depth are often combined to establish sediment core chronology. Although these methods have been widely used during the last several decades, there is a lack of structured and comprehensive worldwide synthesis of fallout radionuclide analyses used for dating sediment cores in environmental and Earth sciences. The current literature overview was based on the compilation of 573 articles published between 1977 and 2020, reporting the collection of 1351 individual dating sediment cores (the dataset can be accessed at https://doi.pangaea.de/10.1594/PANGAEA.931493). This review was conducted in order to map the locations where 137Cs fallout events were detected. These included the thermonuclear bomb testing peak in 1963, the Chernobyl accident in 1986, the Fukushima accident in 2011, and 24 additional events identified in 112 sites that led to local radioactive releases (e.g. Sellafield accidents, Chinese nuclear tests). When 210Pbxs records were used along with 137Cs data, detailed information on the 210Pbxs age depth models were also synthesized. Multiple information including the core collection method, sediment properties, radionuclide analysis techniques and catchment characteristics were also compiled. With the current growing number of studies analyzing sediment cores and the increasing interest in the deployment of sediment fingerprinting techniques including radionuclides as potential discriminant properties, this spatialized synthesis provides a unique worldwide compilation for characterizing fallout radionuclide sources and levels at the global scale. This synthesis provides in particular a referential of 137Cs peak attribution for improving the sediment core dating and it outlines the main questions that deserve attention in future research as well as the regions where additional 137Cs fallout investigations should be conducted in priority.

show abstract

Anthropogenic influence on the sediment chemistry and diatom assemblages of Balamtetik Lake, Chiapas, Mexico

Cited by 16 publications

References 24 publications

Microcrustacean (Cladocera and Copepoda) Assemblages of a Tropical Karst Lake District

Microcrustacean (Cladocera and Copepoda) Assemblages of a Tropical Karst Lake District

A worldwide meta-analysis (1977–2020) of sediment core dating using fallout radionuclides including <sup>137</sup>Cs and <sup>210</sup>Pb<sub>xs</sub>

A worldwide meta-analysis (1977–2020) of sediment core dating using fallout radionuclides including <sup>137</sup>Cs and <sup>210</sup>Pb<sub>xs</sub>

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Anthropogenic influence on the sediment chemistry and diatom assemblages of Balamtetik Lake, Chiapas, Mexico

Cited by 16 publications

References 24 publications

Microcrustacean (Cladocera and Copepoda) Assemblages of a Tropical Karst Lake District

Microcrustacean (Cladocera and Copepoda) Assemblages of a Tropical Karst Lake District

A worldwide meta-analysis (1977–2020) of sediment core dating using fallout radionuclides including &lt;sup&gt;137&lt;/sup&gt;Cs and &lt;sup&gt;210&lt;/sup&gt;Pb&lt;sub&gt;xs&lt;/sub&gt;

A worldwide meta-analysis (1977–2020) of sediment core dating using fallout radionuclides including &lt;sup&gt;137&lt;/sup&gt;Cs and &lt;sup&gt;210&lt;/sup&gt;Pb&lt;sub&gt;xs&lt;/sub&gt;

Contact Info

Product

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A worldwide meta-analysis (1977–2020) of sediment core dating using fallout radionuclides including <sup>137</sup>Cs and <sup>210</sup>Pb<sub>xs</sub>

A worldwide meta-analysis (1977–2020) of sediment core dating using fallout radionuclides including <sup>137</sup>Cs and <sup>210</sup>Pb<sub>xs</sub>