Data from a photochemical and biological degradation experiment carried out on dissolved organic matter from thermokarstic ponds representing a gradient of erosion and terrestrial inputs, Bylot Island, Nunavut, Canada.
Abstract
These data originate from a dissolved organic matter (DOM) degradation experiment carried out at Bylot Island (Qarlikturvik Valley, 73°09’N, 79°58’W), in the eastern Canadian Arctic. The site is a thick peaty terrain underlain with continuous syngenetic permafrost and structured in ice-wedge polygons. It is covered with thousands of shallow ponds forming a typical polygonal tundra landscape. Water was sampled from 6 thermokarst ponds and a 14-day incubation was carried out between 3rd and 16th July 2017 at the water surface. Water was filtered and distributed into bottles exposed to sunlight or covered from it to generate treatments and evaluate the efficiency of DOM photodegradation and biodegradation. Dissolved organic carbon, along with optical variables characterizing the chromophoric fraction of DOM (a320, SUVA254, fluorescent PARAFAC components…) and microbial abundance, were measured at the beginning and end of the incubation. The originality of the study is that ponds were selected to obtain a gradient of terrestrial inputs from surrounding eroding permafrost soil, including two erosive ice-wedge trough ponds, two stable ice-wedge trough ponds and two coalescent polygon ponds.
Data citation
Mazoyer, F., Rautio, M., Laurion, I. 2024. Data from a photochemical and biological degradation experiment carried out on dissolved organic matter from thermokarstic ponds representing a gradient of erosion and terrestrial inputs, Bylot Island, Nunavut, Canada., v. 1.0. Nordicana D136, doi: 10.5885/45909CE-7A737542A70C4382.
Location map
Key references
- Mazoyer, F., Rautio, M., Laurion, I. (2024). Browning may promote photodegradation of dissolved organic matter: experimental evidence from Arctic thermokarst ponds, Limnology and Oceanography (submitted)
Acknowledgements
We are grateful to Parks Canada, the Centre for Northern Studies (CEN) and Gilles Gauthier for providing logistic and infrastructure support during this project, and to Thomas Pacoureau for assistance in the field. We would like to thank Jérôme Comte for access to his flow cytometer and his precious advice on cytometry, and Audrey-Anne Boutin for carrying out some of the analyses. This research was funded by a seeding grant from CEN’s Hudsonie21 program, along with Natural Sciences and Engineering Research Council of Canada's discovery and northern supplement grants to Isabelle Laurion and Milla Rautio. We declare no conflict of interest.
Version history
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Version 1.0 (2017–2017)Updated July 25, 2024
You can request an older version by contacting nordicana@cen.ulaval.ca
Measurement sites
| Site | Latitude | Longitude | Altitude (m) | |
|---|---|---|---|---|
| Bylot Island | 73.15 | -79.983 | 6 | More info |
Download
Data available for download are in ZIP format. Please properly cite the data when using it.
Data of the incubation experiment Get file
Sites
Data
Time
07/2017 – 07/2017
Treatment
07/2017 – 07/2017
Pond
07/2017 – 07/2017
Replicate
07/2017 – 07/2017
DOC
07/2017 – 07/2017
a320
07/2017 – 07/2017
SUVA254
07/2017 – 07/2017
S285
07/2017 – 07/2017
Ftot
07/2017 – 07/2017
HT1
07/2017 – 07/2017
HT2
07/2017 – 07/2017
HT3
07/2017 – 07/2017
HT4
07/2017 – 07/2017
HM1
07/2017 – 07/2017
HM2
07/2017 – 07/2017
P1
07/2017 – 07/2017
P2
07/2017 – 07/2017
Bacteria
07/2017 – 07/2017
Picoautotrophs
07/2017 – 07/2017