The Urban Pressure Over the Sediment Contamination in a Southern Brazil Metropolis: the Case of Diluvio Stream

Santos, Vinícius Maggioni dos; Andrade, Leonardo Capeleto de; Tiecher, Tales; Camargo, Flávio Anastácio de Oliveira

doi:10.1007/s11270-020-04504-2

Cited by 12 publications

(8 citation statements)

References 27 publications

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“…However, urbanized Lake Clément has no eutrophication problem, nor a higher abundance of cyanobacteria, yet the composition of its microbial community was more similar to highly urbanized and hyper-eutrophic Lake Saint-Augustin, than to less eutrophic, but also less urbanized Lake Clair and Lake Saint-Charles. This indicates the importance of other factors related to urbanization, such as the road salts, or of other common contaminants of urban watersheds including pharmaceuticals, toxins and metals from wastewater, sewage and roads ( Hong et al, 2018 ; Ondarza et al, 2019 ; Dos Santos et al, 2020 ; Tian et al, 2020 ). While the exact factor, or combination of factors, to which they respond remain uncertain, the results of the present study suggest that an increase in abundance of bloom-forming cyanobacteria, cryptophytes or haptophytes is exacerbated by urbanization and the associated road salt effects.…”

Section: Discussionmentioning

confidence: 99%

Changes in the Community Structure of Under-Ice and Open-Water Microbiomes in Urban Lakes Exposed to Road Salts

2021

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Salinization of freshwater is increasingly observed in regions where chloride de-icing salts are applied to the roads in winter, but little is known about the effects on microbial communities. In this study, we analyzed the planktonic microbiomes of four lakes that differed in degree of urbanization, eutrophication and salinization, from an oligotrophic reference lake with no surrounding roads, to a eutrophic, salinized lake receiving runoff from a highway. We tested the hypothesis that an influence of road salts would be superimposed on the effects of season and trophic status. We evaluated the microbial community structure by 16S rRNA sequencing for Bacteria, and by four methods for eukaryotes: 16S rRNA chloroplast analysis, 18S rRNA sequencing, photosynthetic pigment analysis and microscopy. Consistent with our hypothesis, chloride and total nitrogen concentrations were among the most important statistical factors explaining the differences in taxonomic composition. These factors were positively correlated with the abundance of cryptophytes, haptophytes, and cyanobacteria. Ice-cover was also a major structuring factor, with clear differences between the winter communities and those of the open-water period. Nitrifying and methane oxidizing bacteria were more abundant in winter, suggesting the importance of anaerobic sediment processes and release of reduced compounds into the ice-covered water columns. The four methods for eukaryotic analysis provided complementary information. The 18S rRNA observations were strongly influenced by the presence of ribosome-rich ciliates, but revealed a much higher degree of taxonomic richness and greater separation of lakes, seasonal changes and potential salinity effects than the other methods.

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Section: Discussionmentioning

confidence: 99%

Changes in the Community Structure of Under-Ice and Open-Water Microbiomes in Urban Lakes Exposed to Road Salts

2021

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“…The last sample collection (B5 and C5) occurred after the most intense rain period in the basin. The sediments collected in samples B1, B5, and C5 had the highest concentrations of metals Pb, Cu, Zn and Cd, which have a strong relationship with urban pollution [27,[37][38][39]. Despite the metals being found in the basin's soil samples, the high concentrations found in the sediment are evidence that diffuse pollution possibly contribute to it.…”

Section: Discussionmentioning

confidence: 93%

Fingerprinting Sediment Origin of the Silting Process of Urban Reservoirs

et al. 2023

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The silting process of urban reservoirs has been occurring in many regions across the world. However, identifying the main sources of sediment and controlling the silting process in urban reservoirs are still unsolved problems in many regions, mainly in developing countries such as Brazil. In this study, we identify which land use most influences the siltation of reservoirs, and how the different tributary streams contribute to this process in two urban reservoirs located in Campo Grande, Midwestern Brazil. Thus, we applied a sediment source fingerprinting (SSF) approach, associated with land use analysis, and the bathymetric data of reservoirs connected to the stream and drainage network, obtained between the years 2008 and 2018. The reduction in the volume and area of the reservoir during the study period were 45% and 39%, respectively. We found a proportional relationship between the reduction in the reservoir volume and the increase in the impermeable areas of the studied basin. We also noted that the sediments deposited in the reservoir originate from bare soil, banks, and bed in the proportions of 46.9%, 37.1%, and 17.2%, respectively. Our findings show that the use of bathymetric surveys and data on land use and land cover, associated with the source tracing technique, are useful alternatives to identifying sediment mobility in urban basins, especially in those where the drainage network is connected to water courses. We conclude that the factors that most contribute to the silting up of reservoirs are the erosion of banks and beds, sediment remobilization and the connectivity of the drainage network with water courses.

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“…5), associated with the elements As, Cd, Cu, Pb, and Zn. Unexplored mineral deposits can pose pollution risks to the aquatic environment (Wang et al, 2006) Anthropogenic sources of potentially toxic elements to the aquatic environment Among the nine anthropogenic sources identi ed in the SLR, mining stood out, occurring in 29 publications, followed by agriculture (26 publications), industries (22), and domestic e uents (19 publications). The tra c source occurred in 13 publications, industrial e uents in 10, atmospheric deposition from polluted areas in 4, hospital e uents in 2 publications, and the waterway transport source occurred in only one publication (Fig.…”

Section: Unexplored Mineral Depositsmentioning

confidence: 99%

Natural and anthropogenic sources of potentially toxic elements to aquatic environment: a systematic literature review

Carvalho

Botero

Oliveira

2022

Environ Sci Pollut Res

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Potentially toxic elements (PTEs) constitute a class of metals, semimetals, and non-metals that may or may not be essential to living organisms and are of concern due to their persistence, toxicity, bioaccumulation, and biomagni cation in high concentrations. PTEs can be introduced into the aquatic environment from various sources, anthropogenic or natural, occurring in waters, sediments, and organisms, posing risks to the ecosystem and to human health. A systematic literature review (SLR) was used in this study to identify natural and anthropogenic sources of PTEs for the aquatic environment.The databases consulted were ScienceDirect, Scopus, and Web of Science, in the period 2000-2020, using speci c terms and lters. After analyzing the titles, abstracts, and full texts, 79 articles were selected for the SLR, in which 21 sources and 16 EPTs were identi ed. The main anthropogenic source identi ed was mining and the main natural source identi ed was the weathering of rocks. Is worth noting that the identi cation of polluting sources is essential for the environmental monitoring of PTEs, as these elements cycle in the environment, not being chemically or biologically degraded, and can cause serious problems for various living organisms including human health.

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The Urban Pressure Over the Sediment Contamination in a Southern Brazil Metropolis: the Case of Diluvio Stream

Cited by 12 publications

References 27 publications

Changes in the Community Structure of Under-Ice and Open-Water Microbiomes in Urban Lakes Exposed to Road Salts

Changes in the Community Structure of Under-Ice and Open-Water Microbiomes in Urban Lakes Exposed to Road Salts

Fingerprinting Sediment Origin of the Silting Process of Urban Reservoirs

Natural and anthropogenic sources of potentially toxic elements to aquatic environment: a systematic literature review

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