title: Vegetation community composition in wetlands created following oil sand mining in Alberta, Canada.
abstract: Reclaiming wetlands following open pit mining for industrial oil sand extraction is challenging due to the physical and chemical conditions of the post-mined landscape. The aim of our study was to examine and compare the influence of oil sands process water (OSPW) and material (fine fluid tails or FFT) on the plant community composition of created wetlands. Compared to created-unamended and natural wetlands, the created wetlands amended with OSPW and/or FFT (created-tailings wetlands) had significantly higher water salinity, conductivity, dissolved oxygen concentration and lower oxidative-reductive potential. Water chemistry parameters of created-unamended did not differ significantly from those of natural wetlands. The sediment of created wetlands had significantly less moisture, total nitrogen, and organic content than the natural wetlands. The application of OSPW/FFT in created wetlands will likely lead to initial vegetation composition atypical of natural regional wetlands. For the objective of reclaiming vegetation composition to the status of natural regional wetlands, unamended wetlands were the best reclamation option, based on the physical and chemical parameters measured. Despite being the favored reclamation option, created-unamended wetlands' physical and chemical characteristics remain atypical of natural wetlands. Most significantly, the basin morphometry of created wetlands was significantly different from that of naturally-formed wetlands in the region, and this appears to partly explain difference in vegetation composition. We also demonstrate that species richness alone is not a useful measure in wetland monitoring. Instead, plant community composition is a better indicator of wetland conditions.
authors.affiliation: Department of Renewable Resources, University of Alberta, Canada; Alberta Biodiversity Monitoring Institute, University of Alberta, Canada. Electronic address: roy4@ualberta.ca.
authors.forename: Marie-Claude
authors.initials: MC
authors.lastname: Roy
authors.affiliation: Department of Renewable Resources, University of Alberta, Canada; Devonian Botanic Garden, Alberta, Canada. Electronic address: lee.foote@ualberta.ca.
authors.forename: Lee
authors.initials: L
authors.lastname: Foote
authors.affiliation: Department of Biological Sciences, University of Windsor, Canada. Electronic address: cibor@uwindsor.ca.
authors.forename: Jan J H
authors.initials: JJ
authors.lastname: Ciborowski
mesh_terms: D000416:Alberta; D001673:Biodegradation, Environmental; D017753:Ecosystem; D019015:Geologic Sediments; D007220:Industrial Waste; D061329:Oil and Gas Fields; D000066388:Oil and Gas Industry / Q000379:methods*; D010944:Plants; D062065:Wastewater / Q000737:chemistry; D053833:Wetlands
chemical_list: D007220:Industrial Waste; D062065:Wastewater
keywords: Industrial alteration; Plant community; Restoration; Wetland reclamation