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Nordicana
D131 / DOI :
10.5885/45894CE-B3C95FF767D14B50
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Dissolved Organic Matter, Nutrients, and Bacterial Metabolism (Respiration and Growth) in Ponds on Degrading Ice-Wedge Polygonal Terrain, Bylot Island, Nunavut, Canada (2017-2019).
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Thomas Pacoureau1,2,
Isabelle Laurion1,2,
Milla Rautio3,2
1Institut National de la Recherche Scientifique
2Centre d'études nordiques
3Université du Québec à Chicoutimi
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Abstract
Ponds were sampled every July on Bylot Island (Qarlikturvik Valley, 73°09’N, 79°58’W) from 2017 to 2019. In 2017 and 2018, ponds were sampled twice during the sampling campaign. Samples were collected approximately 20 centimeters below the surface or above the sediments. Ponds were characterized by their morphologies and the level of soil erosion due to permafrost degradation; the three categories are erosive ice-wedge trough (eIWT) ponds, stable ice-wedge trough (sIWT) ponds, and coalescent polygon (CP) ponds. The purpose of the data was to characterize dissolved organic matter (DOM) and nutrient (nitrogen and phosphorus species) supplies in ponds commonly encountered in degrading ice-wedge polygonal landscapes and to identify potential drivers of DOM decomposition and heterotrophic bacterial metabolism in these systems. DOM quality was assessed through absorbance (a320, SUVA254, and S285) and fluorescence metrics (PARAFAC EEMs, components C1-C8).
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Pacoureau, T., Laurion, I., Rautio, M. 2024. Dissolved Organic Matter, Nutrients, and Bacterial Metabolism (Respiration and Growth) in Ponds on Degrading Ice-Wedge Polygonal Terrain, Bylot Island, Nunavut, Canada (2017-2019)., v. 1 (2017-2019). Nordicana D131, doi: 10.5885/45894CE-B3C95FF767D14B50.
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We sincerely thank V. Laderrière, J. Comte, V. Preskienis, and F. Mazoyer for their assistance in the field. Additionally, we extend our gratitude to D. Bélanger, J. Perreault, L. Rancourt, and V. Laderrière for their contributions to water chemistry analysis, and to F. Soulat for flux cytometry analysis. This research was supported by the Natural Sciences and Engineering Research Council of Canada, and the Polar Continental Shelf Program (Natural Resources Canada). We gratefully acknowledge the Centre for Northern Studies for providing access to research infrastructures, Parks Canada and the community of Mittimatalik for access to the study site, and the Interuniversity Research Group in Limnology for access to their analytical services.
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Polar Data Catalogue links (Metadata)
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You can request for data from previous versions at nordicana@cen.ulaval.ca.
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Version 1
(2017-2019) - Updated March 25, 2024
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Site |
Latitude |
Longitude |
Altitude (m) |
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| More info
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Bylot Island
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73.15 |
-79.983 |
6 |
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