| Title | Carbon dynamics food web structure and reclamation strategies in Athabasca oil sands wetlands (CFRAW) |
| Publication Type | Conference Proceedings |
| Year of Publication | 2008 |
| Authors | Ciborowski, J. J., Dixon D. G., Foote L., Liber K., & Smits J. E. |
| Corporate Authors | Kidd, K. A., Jarvis R. A., Doe H. K., & Burridge L. E. |
| Pagination | 63 pages |
| Date Published | 10/2007 |
| Place Published | Halifax, NS |
| Publication Language | eng |
| Keywords | ecology, microbiology, peat, UofA, UofS, wetlands |
| Abstract | Carbon sources, microbial community production and respiration were determined in nine northeastern Alberta wetlands subject to oil sands mining. A stable isotope mixing model estimated the proportion of carbon sources (primary production, sediment and petroleum) assimilated by microbes. The proportions of petroleum-derived carbon from oil sands process material (OSPM)-affected wetlands ranged from 62-97%. Bacterioplankton production was quantified by monitoring 3H-leucine incorporation into bacterial proteins. Production and methanogenesis were inhibited by sulphate and/or salinity. Amending wetland sediments with topsoil, a reclamation strategy, did not affect bacterial production or stimulate decomposition. Unvegetated wetland sediments were small net exporters of C and do not appear to be on a trajectory to becoming net sinks in these early stages of development. Overall, microbial functional processes in OSPM- affected wetlands are markedly different from processes in reference-constructed wetlands of equivalent age and do not correspond to those in a mature natural wetland. |
| Notes | IN: Proceedings of the 34th Annual Aquatic Toxicity Workshop September 30 - October 3, 2007 Halifax, Nova Scotia. Kidd K.A. R.A. Jarvis K. Haya K. Doe and L.E. Burridge (Eds.). Canadian Technical Report of Fisheries and Aquatic Sciences No. 2793. pp. 63 |
| Group | OSEMB |
| Citation Key | 51766 |
