Multiple environmental variables influence diatom assemblages across an arsenic gradient in 33 subarctic lakes near abandoned gold mines

Sivarajah, Branaavan; Korosi, Jennifer B.; Blais, Jules M.; Smol, John P.

doi:10.1007/s10750-019-04014-1

Cited by 29 publications

(26 citation statements)

References 66 publications

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“…Yet, when the lakes in this region were sampled in 2015, the mine-impacted sites still had some of the highest [As] in Canada and exceeded the guidelines for the protection of aquatic life (5 µg L -1 ; CCME 2001) and drinking water quality (10 µg L -1 ; Health Canada, 2006). The high [As] reported in our study lakes that received tailings are comparable to those from the Yellowknife area where lakes were impacted by the atmospheric deposition of As from regional gold mining activities (Palmer et al, 2015;Sivarajah et al, 2019). The concentrations for Ni, K, and SO 4 2 were also high in the lakes that received direct mine waste and migrated tailings in Cobalt.…”

Section: Environmental Determinants Of Recent Limnological Characteristicssupporting

confidence: 73%

Assessing the potential environmental factors affecting cladoceran assemblage composition in arsenic-contaminated lakes near abandoned silver mines

2021

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Silver mining has a long history in Cobalt (Ontario, Canada), and it has left a complex environmental legacy where many lakes are contaminated with arsenic-rich mine tailings. In this exploratory survey, we examined subfossil Cladocera remains in the surface sediments of 22 lakes in the abandoned mining region to assess which environmental variables may be influencing the recent assemblage structure. Further, using a “top-bottom” paleolimnological approach, we compared the recent (top) and older (bottom) assemblages from a subset of 16 lakes to determine how cladoceran composition has changed in these lakes. Our regional survey suggests that the cladoceran assemblages in the Cobalt area are primarily structured by differences in lake depth, while site-specific limnological characteristics, including those related to past mining activities, may have limited roles in shaping the recent cladoceran compositions. The top-bottom paleolimnological analysis suggests that the cladoceran assemblages have changed in most lakes around Cobalt, however the magnitude and nature of changes varied across the study sites. As with most regional biological surveys, the responses to historical mining activities were not uniform across all sites, which further emphasizes the importance of considering site-specific limnological characteristics and multiple environmental stressors when assessing the impacts of mining pollution.

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Section: Environmental Determinants Of Recent Limnological Characteristicssupporting

confidence: 73%

Assessing the potential environmental factors affecting cladoceran assemblage composition in arsenic-contaminated lakes near abandoned silver mines

2021

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“…At a community scale, trace metal contamination selects for tolerant species which are generally represented by pioneer adherent taxa (Morin et al, 2012a), in particular by Achnanthidium minutissimum (Kützing) Czarnecki (Tapia, 2008;Luís et al, 2011;Olenici et al, 2017;Lavoie et al, 2019;Sivarajah et al, 2019;Pandey, 2020) (Pandey, 2020). However, many studies recognized as tolerant taxa also motile species such as nitzschioid diatoms (Pandey & Bergey, 2018), Navicula cincta (Ehrenberg) Ralfs (Guasch et al, 2012), Nitzschia palea (Kützing) W. Smith or Mayamaea atomus (Kützing) Lange-Bertalot (Kim Tiam et al, 2019), high-profile species such as G. pseudoaugur (Gautam et al, 2017) or Hygropetra balfouriana (Grunow ex Cleve) Krammer & Lange-Bertalot in Krammer (Lavoie et al, 2019).…”

Section: Trace Metalsmentioning

confidence: 99%

Looking back, looking forward: a review of the new literature on diatom teratological forms (2010–2020)

et al. 2021

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Over the last years, issues concerning diatom teratological forms and environmental stress have received growing interest within the scientific community. Publications on this topic dated back to 1890 and were summarized in a review published in 2009 by the journal Hydrobiologia, accounting for high citation rates (i.e. 117 citations Scopus and 232 citations Google Scholar, October 2020). This wide interest stimulates the authors to further unravel teratological forms significance in the light of the most recent publications (2010–2020). Diatom teratological forms are one of the best individual-level biomarkers since they provide a rapid response to several environmental stressors, including new emerging pollutants. The mechanisms involved in teratological valve likely involve both cytoskeleton and silicon metabolic pathway impairments. However, teratologies do not seem to weaken the reproduction capacity and viability of the affected individuals. We recognized eight types of teratologies as involving different parts of the valve, depending on genus. In order to summarize the information obtained by several years of research, we suggest a four-step procedure aimed at providing a theoretical pathway that researchers should follow to better explain results obtained in next-future studies and representing a starting point for the development of an environmental index based on teratological forms.

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“…Czarn. ), but nutrient and ionic compounds not related to mining explained most of the variation in the assemblages (Sivarajah, Korosi, Blais, & Smol, 2019). In a multi‐trophic level mesocosm experiment, additions of ferric iron, typically precipitated in association with acid mine drainage, promoted cyanobacterial growth, reduced green algal biomass, and generally reduced abundances of larval and adult macroinvertebrates, especially mayflies and midges (Kotalik, Cadmus, & Clements, 2019).…”

Section: Algaementioning

confidence: 99%

Substratum‐associated microbiota

Furey

Lee

Clemans

2020

Water Environment Research

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Highlights of new, interesting, and emerging research findings on substratum-associated microbiota covered from a survey of 2019 literature from primarily freshwaters provide insight into research trends of interest to the Water Environment Federation and others interested in benthic, aquatic environments. Coverage of topics on bottom-associated or attached algae and cyanobacteria, though not comprehensive, includes new methods, taxa new-to-science, nutrient dynamics, auto-and heterotrophic interactions, grazers, bioassessment, herbicides and other pollutants, metal contaminants, and nuisance, and bloom-forming and harmful algae. Coverage of bacteria, also not comprehensive, focuses on the ecology of benthic biofilms and microbial communities, along with the ecology of microbes like Caulobacter crescentus, Rhodobacter, and other freshwater microbial species. Bacterial topics covered also include metagenomics and metatranscriptomics, toxins and pollutants, bacterial pathogens and bacteriophages, and bacterial physiology. Readers may use this literature review to learn about or renew their interest in the recent advances and discoveries regarding substratum-associated microbiota. © 2020 Water Environment Federation • Practitioner points • This review of literature from 2019 on substratum-associated microbiota presents highlights of findings on algae, cyanobacteria, and bacteria from primarily freshwaters. • Coverage of algae and cyanobacteria includes findings on new methods, taxa new to science, nutrient dynamics, auto-and heterotrophic interactions, grazers, bioassessment, herbicides and other pollutants, metal contaminants, and nuisance, bloomforming and harmful algae. • Coverage of bacteria includes findings on ecology of benthic biofilms and microbial communities, the ecology of microbes, metagenomics and metatranscriptomics, toxins and pollutants, bacterial pathogens and bacteriophages, and bacterial physiology. • Highlights of new, noteworthy and emerging topics build on those from 2018 and will be of relevance to the Water Environment Federation and others interested in benthic, aquatic environments

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Multiple environmental variables influence diatom assemblages across an arsenic gradient in 33 subarctic lakes near abandoned gold mines

Cited by 29 publications

References 66 publications

Assessing the potential environmental factors affecting cladoceran assemblage composition in arsenic-contaminated lakes near abandoned silver mines

Assessing the potential environmental factors affecting cladoceran assemblage composition in arsenic-contaminated lakes near abandoned silver mines

Looking back, looking forward: a review of the new literature on diatom teratological forms (2010–2020)

Substratum‐associated microbiota

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