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Permanent link (DOI): https://doi.org/10.7939/R35T3G971

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Microbial community development and function at a newly reclaimed oil sands site Open Access

Descriptions

Other title
Subject/Keyword
LFH
Microbial community
Reclamation
PMM
Nitrogen cycle
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Zahraei, Shirin
Supervisor and department
Tariq Siddique
Examining committee member and department
Stein, Lisa (Biological Sciences)
Chang, Scott (Renewable Resources)
Department
Department of Renewable Resources
Specialization
Soil Science
Date accepted
2015-04-10T11:55:06Z
Graduation date
2015-11
Degree
Master of Science
Degree level
Master's
Abstract
Assessment of microbial community development is required to determine the success of reclamation process on disturbed land after mining. Peat (PMM) or LFH mineral soil mix (LFH) is used as capping material in reclamation. Application of coarse woody debris (CWD) also facilitates reclamation by developing microsites for biogeochemical processes. To investigate the effect of reclamation material on microbial activities and functions, a study was conducted over a 3-year period at a reclaimed site in Fort MacMurray, Canada. Soil samples were collected bi-annually from LFH and PMM plots amended with or without CWD. Results revealed an increasing trend over time in microbial biomass carbon and nitrogen, respiration rate, β-glucosidase and N-acetylglucosaminidase enzyme activities, and abundances of functional genes (amoA, nirS and nifH) involved in nitrogen cycle. LFH showed more pronounced effect than PMM due to its higher decomposed organic matter content. Application of CWD and addition of fresh labile carbon inputs in fall enhanced microbial growth and function.
Language
English
DOI
doi:10.7939/R35T3G971
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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