Assessment of Diatom Assemblages in Close Proximity to Mining Activities in Nunavik, Northern Quebec (Canada)

International audience Nunavik (Northern Quebec, Canada) is experiencing a mining boom. While several studies have been conducted in the region in relation to climate change, the effects of mining have received much less attention. In this study, we explored the use of biofilms in natural streams as a...

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Bibliographic Details
Published in:Environments
Main Authors: Lavoie, I., Morin, Soizic, Laderriere, V., Paris, L.E., Fortin, C.
Other Authors: Centre Eau Terre Environnement Québec (INRS - ETE), Institut National de la Recherche Scientifique Québec (INRS), Ecosystèmes aquatiques et changements globaux (UR EABX), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)
Format: Article in Journal/Newspaper
Language:English
Published: HAL CCSD 2019
Subjects:
diatom
faunistic assemblages
MINE
CONTAMINATION
DIATOMEE
ASSEMBLAGE FAUNISTIQUE
BIOFILM
[SDE]Environmental Sciences
Arctic
Canada
Nunavik
Climate change
Online Access:https://hal.archives-ouvertes.fr/hal-02267390
https://hal.archives-ouvertes.fr/hal-02267390/document
https://hal.archives-ouvertes.fr/hal-02267390/file/bx2019-pub00061740.pdf
https://doi.org/10.3390/environments6060074
Description
Summary:International audience Nunavik (Northern Quebec, Canada) is experiencing a mining boom. While several studies have been conducted in the region in relation to climate change, the effects of mining have received much less attention. In this study, we explored the use of biofilms in natural streams as an indicator of potential stress on living organisms caused by metal contamination from nickel mining activities. More specifically, we assessed diatom assemblages and the presence of teratologies (morphologic abnormalities) as a response to metals in streams located in close proximity to mining sites. Metal concentrations (as well as other cations), anions and pH values varied markedly among stations. Different diatom assemblage structures (four biotypes, i.e., groups of samples with similar diatom species composition) were observed depending on the level and the type of contamination. The frequency of diatom teratologies was higher in metal contaminated sites. The present study lays the foundation for bioassessment of metal contamination in low Arctic streams using diatom-based approaches, and will serve as a point in time reference for future evaluation of ecosystems degradation or recovery in Nunavik.

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