Anthropogenic and natural inputs of polycyclic aromatic hydrocarbons in the sediment of three coastal systems of the Brazilian Amazon

Lima, Edgar Alexandre Reis de; Neves, Patrícia Andrade; Patchineelam, Sambasiva R.; Silva, José Francisco B. R. da; Takiyama, Luís Roberto; Martins, César C.; Lourenço, Rafael André; Taniguchi, Satie; Elias, Vladimir O.; Bı́cego, Márcia Caruso

doi:10.1007/s11356-020-12010-5

Cited by 12 publications

(4 citation statements)

References 54 publications

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“…The total PAH concentrations (Fig. 4) at sediment, forest, and degraded sites were higher than in studies piloted in other regions affected by wildfires, such as in South Korea, where ash soil samples were collected 1 month after a wildfire, which burned more than 20,000 ha over several days (Kim et al 2003); in Portugal, during the burning of pine forest (Campos et al 2019); in Nigeria, at a tropical rain forest in Nigeria, where seasonal wildfires occurred (Faboya et al 2020); in Switzerland, after a wildfire in Alpine soils (Bucheli et al 2004); in China, from rural forest areas (Xiao et al 2014); and for sediment samples collected around Pará River, which is the most populated area in the coast of the Brazilian Amazon (Lima et al 2021). Only, total PAHs in ash samples from wildfires that occurred near farming areas, in California (USA), showed high value (Fig.…”

Section: Pah Concentrations and Carcinogenic Risksmentioning

confidence: 99%

Human risk assessment of ash soil after 2020 wildfires in Pantanal biome (Brazil)

Caumo

Lázaro

Oliveira

et al. 2022

Air Qual Atmos Health

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Wildfires have increased in the last years and, when caused by intentional illegal burnings, are frequently run out of control. Wildfire has been pointed out as an important source of polycyclic aromatic hydrocarbons (PAHs) and trace elements (TEs) — such as, As, Ni, and Pb — to environmental compartments, and thus may pose a risk to human health and to the ecosystem. In 2020, the Brazilian biome, Pantanal, faced the largest losses by wildfires in the last 22 years. Ashes from the topsoil layer in Pantanal were collected after these wildfires at 20 sites divided into the sediment, forest, PF, PS, and degraded sites. Toxicity and associated risks for human health were also evaluated. The areas highly impacted by wildfires and by artisanal gold mining activities showed higher concentrations for TEs and PAHs than the protected areas. Pb varied from 8 ± 4 to 224 ± 81 mg kg −1 , and total PAH concentration ranged between 880 ± 314 and 1350 ± 70 ng g −1 , at sites impacted by anthropogenic activities. Moreover, health risk assessments for TE and PAH indicated a potentially great risk for children and adults, via ingestion, inhalation, and dermal pathway. The carcinogenic risks exceeded reference values, for both TE and PAH, suggesting harmful conditions, especially for vulnerable groups, such as children and the elderly. Graphical abstract Supplementary Information The online version contains supplementary material available at 10.1007/s11869-022-01248-2.

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Section: Pah Concentrations and Carcinogenic Risksmentioning

confidence: 99%

Human risk assessment of ash soil after 2020 wildfires in Pantanal biome (Brazil)

Caumo

Lázaro

Oliveira

et al. 2022

Air Qual Atmos Health

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“…The current results show a high number of stranding events for Guiana dolphins in the BRNO region, indicating a high mortality rate for the species in this region. This high mortality rate was suggested by Emin‐Lima et al (2010) in a preliminary study on the Amazon Estuary and seems to persist over more recent years, indicating a high abundance of the species in this ecosystem and a constant exposure to anthropogenic and local environmental pressures, such as changes in the ecosystem condition (e.g., da Costa et al, 2022), fishing activity (e.g., Freire et al, 2021), increasing shipping traffic and tourism (e.g., Pereira et al, 2018) and coastal environmental degradation (e.g., Barletta & Lima, 2019; Lima et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

Ups and downs: An insight on the stranding pattern of Guiana dolphins, Sotalia guianensis, in the Amazon Estuary, Northern Brazil

Ruenes,

Costa,

Laeta

et al. 2024

Aquatic Conservation

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Long‐term systematic records of cetacean strandings are valuable indicators of temporal responses of specific cetacean populations and communities to natural or anthropogenic pressures. They also help guide management objectives and conservation actions. Generalized additive models (GAMs) were used to analyse 10 years of systematic and opportunistic surveys of Guiana dolphin strandings in the Amazon Estuary region, Northern Brazil. The spatial distribution of strandings was assessed through kernel density maps, and age‐at‐death structure of this population was described. The model results revealed marked seasonality in the strandings and, by extension, the mortality of Guiana dolphins in the Amazon Estuary. This seasonality varied between the inner estuarine regions and Atlantic coastal area, reflecting the environment's characteristics. Long‐term decline of strandings in the Amazon Estuary inner region and unusual high mortality of young sexually mature individuals were detected. These results, besides the high stranding rate detected for the species, are mostly attributed to the species' interaction with intense fishing activity in the region. Conservation efforts should consider the seasonality of Guiana dolphin strandings in the Amazon Estuary. The systematic monitoring of strandings, especially in high‐frequency areas, is recommended for assessing long‐term species mortality. Additionally, implementing management actions related to the species' interaction with fishing activities, such as regulatory enhancements, gillnet modifications and seasonal no‐fishing zones, is advised. Educational campaigns targeting fishermen and riverine communities are essential to reduce bycatch and the folkloric use of the species. This study underscores the effectiveness of stranding data as a source of biological and ecological information, and as a tool for understanding human actions affecting coastal populations of aquatic mammals. It emphasizes the need for urgent studies to characterize this population, clarify the influence of bycatch as an anthropogenic pressure and implement effective conservation actions to preserve the Guiana dolphin population.

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“…Nonbiogenic diagenetic processes that introduce PAHs into soils are fires, volcanic activity, kerogen diagenesis, and erosion of ancient sedimentary rocks [68]. As for biogenic PAHs, perylene and retene are typical examples [69,70]; naphthalene, phenanthrene, and chrysene derivatives are less frequently mentioned [70][71][72]. Such PAHs are most often formed extracellularly by diagenesis of various biogenic molecules, such as plant waxes, terpenoids, and hopanoids from prokaryotic membranes [67,70,73].…”

Section: Discussionmentioning

confidence: 99%

Diversity and Metabolic Potential of a PAH-Degrading Bacterial Consortium in Technogenically Contaminated Haplic Chernozem, Southern Russia

et al. 2022

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Polycyclic aromatic hydrocarbons (PAHs) are chemically recalcitrant carcinogenic and mutagenic compounds with primarily anthropogenic origin. The investigation of the effects of emissions from energy enterprises on soil microbiomes is of a high priority for modern soil science. In this study, metagenomic profiling of technogenic contaminated soils was carried out based on bioinformatic analysis of shotgun metagenome data with PAH-degrading genes identification. The use of prokaryotic consortia has been often used as one of the bio-remediation approaches to degrade PAHs with different molecular weight. Since the process of PAH degradation predominantly includes non-culturable or yet-to-be cultured species, metagenomic approaches are highly recommended for studying the composition and metabolic abilities of microbial communities. In this study, whole metagenome shotgun sequencing of DNA from two soils with varying PAH levels was performed. In the control site, the total content of 12 priority PAHs was 262 µg kg−1. The background soil levels in the polluted site for PAHs with 3 or more rings exceeded this, at 800 µg kg−1. The abundance of genes and taxa associated with PAH degradation in these two sites were estimated. Despite differences in PAH concentrations up to 1200 µg kg−1, individual and operon-organized PAH degradation genes were almost equally abundant and diverse in pristine and highly contaminated areas. The most numerous taxa in both spots were actinobacteria from Terrabacteria group. In addition to well-known PAH degraders such as Gordonia and Rhodococcus, genes corresponding to the PAH degradation were found in Azoarcus, Burkholderia and Variovorax. The data shows non-specificity and multifunctionality of metabolic pathways encoded in the genes of PAH-degrading microorganisms.

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Anthropogenic and natural inputs of polycyclic aromatic hydrocarbons in the sediment of three coastal systems of the Brazilian Amazon

Cited by 12 publications

References 54 publications

Human risk assessment of ash soil after 2020 wildfires in Pantanal biome (Brazil)

Human risk assessment of ash soil after 2020 wildfires in Pantanal biome (Brazil)

Ups and downs: An insight on the stranding pattern of Guiana dolphins, Sotalia guianensis, in the Amazon Estuary, Northern Brazil

Diversity and Metabolic Potential of a PAH-Degrading Bacterial Consortium in Technogenically Contaminated Haplic Chernozem, Southern Russia

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