δ 15 N tracks changes in the assimilation of sewage-derived nutrients into a riverine food web before and after major process alterations at two municipal wastewater treatment plants

Hicks, Keegan A.; Loomer, Heather A.; Fuzzen, Meghan; Kleywegt, Sonya; Tetreault, Gerald R.; McMaster, Mark E.; Servos, Mark R.

doi:10.1016/j.ecolind.2016.09.011

Cited by 33 publications

(67 citation statements)

References 46 publications

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“…The year 2012 was unusually dry (low flow) and warm compared to 2013, which was unusually wet (high flows) [36]. The year 2012 was unusually dry (low flow) and warm compared to 2013, which was unusually wet (high flows) [36].…”

Section: Over-time Environmental Conditions At the Mwwtp-impacted Sitesmentioning

confidence: 98%

“…The highest (annual) ammonia load was reported in 2012 when nitrification of the effluent was minimal [36]. Despite this issue, small process changes led to differences in the Waterloo effluent quality between 2011 and 2014.…”

Section: Over-time Environmental Conditions At the Mwwtp-impacted Sitesmentioning

confidence: 99%

“…Altered exposure and environmental factors, such as fluctuation in temperature and oxygen availability, are potentially important in modifying gene expression across years and sites. Rainbow darter have the potential to move in these open systems; however, stable isotope analysis has demonstrated that the majority of rainbow darter have a very small home range of a few meters [26,36], suggesting that there can be prolonged exposure to chemical stressors. In addition, it alters stress-related proteins and hypoxia-inducible factor, which controls the expression of multiple genes during hypoxia [49,50].…”

Section: Over-time Environmental Conditions At the Mwwtp-impacted Sitesmentioning

confidence: 99%

“…Although the Waterloo MWWTP did not have major upgrades during the study period, there were changes in the effluent quality [36] that resulted in altered contaminant distribution in the effluent. Based on chloride, which is a conservative indicator in effluent exposure, the Waterloo site appears to have had similar or slightly higher effluent exposure (10-16%) across the years (except for 2012) compared to the site below the Kitchener outfall.…”

Section: Differentially Expressed Probes Across Sites and Yearsmentioning

confidence: 99%

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Returning to normal? Assessing transcriptome recovery over time in male rainbow darter (Etheostoma caeruleum) liver in response to wastewater‐treatment plant upgrades

Marjan

Martyniuk

Fuzzen

et al. 2017

Enviro Toxic and Chemistry

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The present study measured hepatic transcriptome responses in male rainbow darter (Etheostoma caeruleum) exposed to 2 municipal wastewater-treatment plants (MWWTPs; Kitchener and Waterloo) over 4 fall seasons (2011-2014) in the Grand River (Ontario, Canada). The overall goal was to determine if upgrades at the Kitchener MWWTP (in 2012) resulted in transcriptome responses indicative of improved effluent quality. The number of differentially expressed probes in fish downstream of the Kitchener outfall (904-1223) remained comparable to that downstream of Waterloo (767-3867). Noteworthy was that year and the interaction of year and site explained variability in more than twice the number of transcripts than site alone, suggesting that year and the interaction of year and site had a greater effect on the transcriptome than site alone. Gene set enrichment analysis revealed a gradual reduction in the number of gene ontologies over time at exposure sites, which corresponded with lower contaminant load. Subnetwork enrichment analysis revealed that there were noticeable shifts in the cell pathways differently expressed in the liver preupgrade and postupgrade. The dominant pathways altered preupgrade were related to genetic modifications and cell division, whereas postupgrade they were associated with the immune system, reproduction, and biochemical responses. Molecular pathways were dynamic over time, and following the upgrades, there was little evidence that gene expression profiles in fish collected from high-impact sites postupgrade were more similar to those in fish collected from reference site. Environ Toxicol Chem 2017;36:2108-2122. © 2017 SETAC.

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Section: Over-time Environmental Conditions At the Mwwtp-impacted Sitesmentioning

confidence: 98%

Section: Over-time Environmental Conditions At the Mwwtp-impacted Sitesmentioning

confidence: 99%

Section: Over-time Environmental Conditions At the Mwwtp-impacted Sitesmentioning

confidence: 99%

Section: Differentially Expressed Probes Across Sites and Yearsmentioning

confidence: 99%

See 2 more Smart Citations

Returning to normal? Assessing transcriptome recovery over time in male rainbow darter (Etheostoma caeruleum) liver in response to wastewater‐treatment plant upgrades

Marjan

Martyniuk

Fuzzen

et al. 2017

Enviro Toxic and Chemistry

Self Cite

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“…Associated with this industrialization is overburdening of municipal sewage plants that discharge partially treated sewage effluent that contributes to river base flows and contamination of surface water sources [2]. The quality of drinking water is powerful environment determinant of health.…”

Section: Introductionmentioning

confidence: 99%

The Use of Ceramic Water Filters in Improving the Microbial Quality of Drinking Water

Tshishonga¹,

Gumbo²

2017

Nov. 27-28, 2017 South Africa ASETWM-17, RCABES-17 &Amp; EBHSSS-17

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Abstract-Water borne infections are the number killer of children under five years in developing countries. The main reason is the consumption of untreated drinking water. Here we report on the use of ceramic water filters in reducing Escherichia coli, a surrogate for pathogens in drinking water and can be applied in a rural household. For microbiological analysis, the two ceramic water filters, one from Mukondeni and the other one from Sese in Zimbabwe reduced the high microbial load of the raw water. The result showed that the counts as colony form units, of coliform in the purified water was zero and in raw water was too many to count; these colonies were probably removed by the ceramic water filter. The microbial counts in the purified water were zero colony forming units per 100 ml and within the SANS 241 guidelines values. The ceramic water filters from Mukondeni and Sese were able to improve the microbial quality of the raw water. The Sese ceramic water filter was slow and thus further improvements are required in the composition of materials by increasing the saw dust component and reducing the clay component. Thus, ceramic water filters are suitable for use at household level.

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Assessing recovery of in vitro steroid production in male rainbow darter (Etheostoma caeruleum) in response to municipal wastewater treatment plant infrastructure changes

Marjan

Kraak

MacLatchy

et al. 2017

Enviro Toxic and Chemistry

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The present study examined in vitro 11-ketotestosterone and testosterone production by the testes of rainbow darter (Etheostoma caeruleum) collected from selected reference sites and downstream of 2 municipal wastewater treatment plants (MWWTPs; Waterloo and Kitchener) on the central Grand River (Ontario, Canada), over a 6-yr period (2011-2016). The main objective was to investigate if infrastructure upgrades at the Kitchener MWWTP in 2012 resulted in a recovery of this response in the post-upgrade period (2013-2016). Two supporting studies showed that the fall season is appropriate for measuring in vitro sex steroid production because it provides stable detection of steroid patterns, and that the sample handling practiced in the present study did not introduce a bias. Infrastructure upgrades of the Kitchener MWWTP resulted in significant reductions in ammonia and estrogenicity. After the upgrades, 11-ketotestosterone production by MWWTP-exposed fish increased in 2013 and it continued to recover throughout the study period of 2014 through 2016, returning to levels measured in reference fish. Testosterone production was less sensitive and it lacked consistency. The Waterloo MWWTP underwent some minor upgrades but the level of ammonia and estrogenicity remained variable over time. The production of 11-ketotestosterone and testosterone in rainbow darter below the Waterloo MWWTP was variable and without a clear recovery pattern over the course of the present study. The results of the present study demonstrated that measuring production of sex steroids (especially 11-ketotestosterone) over multiple years can be relevant for assessing responses in fish to environmental changes such as those resulting from major infrastructure upgrades. Environ Toxicol Chem 2018;37:501-514. © 2017 SETAC.

show abstract

δ 15 N tracks changes in the assimilation of sewage-derived nutrients into a riverine food web before and after major process alterations at two municipal wastewater treatment plants

Cited by 33 publications

References 46 publications

Returning to normal? Assessing transcriptome recovery over time in male rainbow darter (Etheostoma caeruleum) liver in response to wastewater‐treatment plant upgrades

Returning to normal? Assessing transcriptome recovery over time in male rainbow darter (Etheostoma caeruleum) liver in response to wastewater‐treatment plant upgrades

The Use of Ceramic Water Filters in Improving the Microbial Quality of Drinking Water

Assessing recovery of in vitro steroid production in male rainbow darter (Etheostoma caeruleum) in response to municipal wastewater treatment plant infrastructure changes

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