RESEARCH ARTICLE
Understanding the peak growing season ecosystem water-use efficiency at four boreal fens in the Athabasca oil sands region
Olena Volik,
Richard Petrone,
Eric Kessel,
Adam Green,
Jonathan Price,
Corresponding Author
Olena Volik
Department of Geography and Environmental Management, University of Waterloo, Waterloo, Canada
Correspondence
Olena Volik, Department of Geography and Environmental Management, University of Waterloo, 200 University Ave W, Waterloo, ON N2L 3G1, Canada.
Email: [email protected]
Search for more papers by this authorRichard Petrone
Department of Geography and Environmental Management, University of Waterloo, Waterloo, Canada
Search for more papers by this authorEric Kessel
Department of Geography and Environmental Management, University of Waterloo, Waterloo, Canada
Search for more papers by this authorAdam Green
Department of Geography and Environmental Management, University of Waterloo, Waterloo, Canada
Search for more papers by this authorJonathan Price
Department of Geography and Environmental Management, University of Waterloo, Waterloo, Canada
Search for more papers by this authorOlena Volik,
Richard Petrone,
Eric Kessel,
Adam Green,
Jonathan Price,
Corresponding Author
Olena Volik
Department of Geography and Environmental Management, University of Waterloo, Waterloo, Canada
Correspondence
Olena Volik, Department of Geography and Environmental Management, University of Waterloo, 200 University Ave W, Waterloo, ON N2L 3G1, Canada.
Email: [email protected]
Search for more papers by this authorRichard Petrone
Department of Geography and Environmental Management, University of Waterloo, Waterloo, Canada
Search for more papers by this authorEric Kessel
Department of Geography and Environmental Management, University of Waterloo, Waterloo, Canada
Search for more papers by this authorAdam Green
Department of Geography and Environmental Management, University of Waterloo, Waterloo, Canada
Search for more papers by this authorJonathan Price
Department of Geography and Environmental Management, University of Waterloo, Waterloo, Canada
Search for more papers by this authorFunding information Alberta Environment and Parks; Canadian Network for Research and Innovation in Machining Technology, Natural Sciences and Engineering Research Council of Canada; Imperial Oil Limited; Japan Canada Oil Sands Limited; Shell Canada; Suncor Energy Incorporated; Teck Resources Limited
Abstract
Ecosystem water-use efficiency (WUE), a ratio between gross ecosystem production (GEP) and water loss through evapotranspiration (ET) can be helpful for the assessment of coupled peatland carbon and water cycles under anthropogenic changes in the Athabasca oil sands region (AOSR) where extensive oil sands development has been occurring since the 1960's. As such, this study assessed multiyear peak growing season variability of WUE at four fens (poor treed, poor open, treed moderate-rich, open saline) near Fort McMurray using the eddy covariance technique combined with a set of environmental variables. Freshwater fens were characterized by WUE values within the range reported from other boreal wetlands while a saline fen had significantly lower values of WUE. Negative correlation (Rs < −0.55, p < 0.05) between WUE and net radiation was observed. Moisture conditions were responsible for interannual differences in WUE, whereby increasing WUE under wetter conditions was observed. However, such a pattern was offset by decreased air temperature (Tair) resulting in moisture oversupply. This study also revealed a negative effect of wildfire on WUE due to a prominent decline in GEP and a moderate decrease in ET. WUE can be useful for monitoring the functioning of natural and constructed fens, but a better understanding of WUE variability under a wide range of climatic conditions with respect to differences in vegetation is required.
Open Research
DATA AVAILABILITY STATEMENT
The data that support the findings of this study are available from the corresponding author upon reasonable request.
Supporting Information
| Filename | Description |
|---|---|
| hyp14323-sup-0001-SupInfo.docxWord 2007 document , 22.2 KB |
TABLE S1 List of variables measured at each site in 2011–2018 TABLE S2 List of equipment installed at each site |
Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.
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