Dehcho Region Water Quality Data

Carte et visualisation

Mercury is a global contaminant that accumulates in organisms, including humans, and can result in many health problems. Eating fish is the primary route by which humans are exposed to mercury, and mercury levels tend to be high in northern regions due to global atmospheric circulation patterns and atmospheric deposition of mercury. Our aim is to understand what the key drivers of fish mercury concentrations are in traditional fishing lakes in the Dehcho region, and how/if these drivers vary predictably among lakes. Furthermore, the water quality, sediment quality, fish tissue and fish health results have informed consumption guidelines of the fish in the waterbodies being studied, as fish are a valuable traditional food resource to First Nations.

During a study conducted over the last three years funded by CIMP (#00154), Northern Contaminants Program, Health Canada, and NSERC, we found that some Dehcho lakes have high mercury concentrations in top predator food fish species, such as Northern Pike (exceed Health Canada consumption guidelines), whereas other lakes have relatively low mercury concentrations in these species. Our results found that among-lake variability in fish mercury concentrations are not fully explained by any of the variety of variables we investigated, including fish growth rates, fish trophic position, fish age, and fish size. We also found an interesting decoupling between mercury concentrations in water and mercury concentrations in fish, and that lakes with high fish mercury concentrations do not necessarily have high rates of mercury biomagnification through the food web. The water quality and fish data also establish reference conditions for the area relative to future development and a changing climate.

Version 3.0.0
Courriel de l'intendant des données
Organisation de collecte de données Wilfrid Laurier University
Organisation de téléchargement de données Heidi Swanson; Dehcho First Nations
Code de progrès onGoing
Code de fréquence d'entretien unknown
Code de catégorie du sujet inlandWaters
Mots clés Water Quality, Mercury, Fish, Dehcho
Étendue spatiale -123,057° 60,303°, -117,634° 63,915° (O S, E N)
Étendue temporelle 2013-09-09 to 2022-09-16
Date publiée
Formats alternatifs FGP-HNAP ISO:19115-2 (XML) , W3C DCAT (XML) , W3C DCAT (JSON-LD)


Wilfrid Laurier University. 2024-02-13. "Dehcho Region Water Quality Data" (dataset). 3.0.0. DataStream.

Informations sur la collecte de données

To assess chemical parameters standard 1-litre grab water sample bottles were collected at discrete depths using a peristaltic pump, acid-washed Teflon tubing and following standard best practices. Water was collected for ultra-trace Hg analysis using EPA protocols 1631 and 1669 (US EPA, 1996a&b). The clean-hands dirty-hands technique will be used to collect unfiltered water samples. All fish tissue and water were collected following best practices of Quality Assurance and Quality Control in the field and laboratory.

Licence d'attribution (ODC-By) v1.0

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Accès à API

curl -G --data-urlencode "\\$filter=DOI eq '10.25976/j1fz-z275'" -H "x-api-key: PRIVATE-API-KEY"

Journal des modifications


Update to metadata


Added new data from 2021-2022 field season.

Schéma v2.18.4
Résumer SHA3-256:6aedef0e05818c0bf2225bf5af81b01e7a6766e1206e13f5cb6ae6bc41cf3fb1
Taille du fichier 111.58 KB


DataStream system update: set citation to recommended default.


initial submission

Schéma v2.1.3
Résumer SHA2-256:b220614b0487a1fce0b35c7f9ef62357e5933042b492ecc3a5bf1f6e8bf7b209
Taille du fichier 209.16 KB