Name
How do restoration techniques applied to seismic lines affect ground layer evapotranspiration from peatlands?
Date & Time
Monday, May 25, 2026, 2:00 PM - 2:15 PM
Description
Seismic line disturbance has influenced many environmental conditions, resulting in slow recovery of trees after disturbance. Therefore, restoration activities have been implemented to encourage the return of forest cover. The most common active restoration method is mechanical mounding, which creates microtopography on seismic lines. This study aims to provide insights into the impact of different mounding techniques, including inline mounding, inverted mounding, and hummock transfer, on evapotranspiration (ET) one of the dominant hydrologic fluxes in continental peatlands. Evapotranspiration of the ground layer was measured using an enclosed portable chamber on seismic lines and adjacent natural areas at several sites across Alberta and northeastern British Columbia. The results indicate that ET on all mounded lines is higher than in natural areas. The highest and lowest ET values were associated with inverted mounding and hummock transfer, respectively. Regarding microtopography, ET from hummocks was higher than from hollows in both natural areas and mounded lines; however, in mounded lines, this difference is greater than in undisturbed areas. From the perspective of environmental controls, water table depth and photosynthetically active radiation (PAR) drive ET on mounded lines. However, soil temperature also plays a pivotal role in ET on inverted mounded lines. We also found that vascular plant coverage significantly controls ET in both natural and mounded lines. The higher ET observed on inverted mounded lines suggested greater water loss that could help contribute to lower water contents that promote tree establishment and growth.
Location Name
DSU Council Chambers
Full Address
Dalhousie University
Halifax NS
Canada
Session Type
Oral Presentation
Abstract ID
18
Speaker Organization
University of Waterloo
Session Name
B2 (2 of 3)
Co-authors
Henry Gibbons, Megan Schmidt, Nazia Tabassum, and Maria Strack University of Waterloo
Presenting Author
Maryam Bayatvarkeshi, University of Waterloo