Microbial community structure and nutrient availability in oil sands reclaimed boreal soils

MacKenzie, M. Derek; Quideau, Sylvie A.

doi:10.1016/j.apsoil.2009.09.002

Cited by 54 publications

(34 citation statements)

References 30 publications

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“…It has been observed that bacteria tend to congregate within the oil-water interface, but the exact mechanisms of their survival in this extreme low-water environment have not been conclusively identified [7]. The Athabasca Oil Sands are unique from other oil deposits as they are water wet, the bulk of which consists of bitumen, sand, and water, which together form an emulsion [67].…”

Section: Tolerance To Low Water Availabilitymentioning

confidence: 99%

Microbial processes in the Athabasca Oil Sands and their potential applications in microbial enhanced oil recovery

Harner

Richardson

Thompson

et al. 2011

J Ind Microbiol Biotechnol

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The Athabasca Oil Sands are located within the Western Canadian Sedimentary Basin, which covers over 140,200 km(2) of land in Alberta, Canada. The oil sands provide a unique environment for bacteria as a result of the stressors of low water availability and high hydrocarbon concentrations. Understanding the mechanisms bacteria use to tolerate these stresses may aid in our understanding of how hydrocarbon degradation has occurred over geological time, and how these processes and related tolerance mechanisms may be used in biotechnology applications such as microbial enhanced oil recovery (MEOR). The majority of research has focused on microbiology processes in oil reservoirs and oilfields; as such there is a paucity of information specific to oil sands. By studying microbial processes in oil sands there is the potential to use microbes in MEOR applications. This article reviews the microbiology of the Athabasca Oil Sands and the mechanisms bacteria use to tolerate low water and high hydrocarbon availability in oil reservoirs and oilfields, and potential applications in MEOR.

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Section: Tolerance To Low Water Availabilitymentioning

confidence: 99%

Microbial processes in the Athabasca Oil Sands and their potential applications in microbial enhanced oil recovery

Harner

Richardson

Thompson

et al. 2011

J Ind Microbiol Biotechnol

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“…Community-level PLFA profiles are useful for detecting soil microbial community responses to various land uses or disturbances in ecosystems [35,36]. The litter derived from coniferous forests decomposes slowly; therefore, coniferous forests may provide fewer labile compounds than the native broadleaf forest.…”

Section: Discussionmentioning

confidence: 99%

Effect of 40 and 80 Years of Conifer Regrowth on Soil Microbial Activities and Community Structure in Subtropical Low Mountain Forests

Chang

Chen

Tian

et al. 2016

Forests

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Abstract:The effects of long-term reforestation on soil microbial communities and biomass are poorly understood. This study was conducted on two coniferous plantations: Cunninghamia konishii Hayata, planted 40 years ago (CONIF-40), and Calocedrus formosana (Florin) Florin, planted 80 years ago (CONIF-80). An adjacent natural broadleaf forest (BROAD-Nat) was used as a control. We determined microbial biomass C and N contents, enzyme activities, and community composition (via phospholipid fatty acid [PLFA] assessment). Both microbial biomass and PLFA content were higher in the summer than in the winter and differed among the forests in summer only. Total PLFA, total bacterial, gram-positive bacterial, gram-negative bacterial, and vesicular arbuscular mycorrhizal fungal contents followed the same pattern. Total fungal content and the ratios of fungi to bacteria and of gram-positive to gram-negative bacteria were highest in CONIF-40, with no difference between the other forests. Principal component analysis of PLFA contents revealed that CONIF-40 communities were distinct from those of CONIF-80 and BROAD-Nat. Our results suggest that vegetation replacement during reforestation exerts a prolonged impact on the soil microbial community. The understory broadleaf shrubs and trees established after coniferous plantation reforestation may balance out the effects of coniferous litter, contributing to bacterial recovery.

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“…Ion exchange resins were used to measure nutrient availability in oil sands reclaimed boreal forest soil. Soil nutrient availability was predominantly affected by site, season, and year of sampling, with high NH þ 4 availability in the spring on vegetated/fertilized sites and high NO À 3 availability year round on the nonvegetated site [22]. Ion exchange resins were also used in a wellsite rehabilitation project, where available N was found to be higher as a result of soil disturbance and lower in seeded treatments due to plant uptake [33].…”

Section: Discussionmentioning

confidence: 99%

Changes in liquid water alter nutrient bioavailability and gas diffusion in frozen antarctic soils contaminated with petroleum hydrocarbons

Harvey¹,

Snape²,

Siciliano³

2011

Enviro Toxic and Chemistry

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Bioremediation has been used to remediate petroleum hydrocarbon (PHC)-contaminated sites in polar regions; however, limited knowledge exists in understanding how frozen conditions influence factors that regulate microbial activity. We hypothesized that increased liquid water (θ(liquid) ) would affect nutrient supply rates (NSR) and gas diffusion under frozen conditions. If true, management practices that increase θ(liquid) should also increase bioremediation in polar soils by reducing nutrient and oxygen limitations. Influence of θ(liquid) on NSR was determined using diesel-contaminated soil (0-8,000 mg kg(-1)) from Casey Station, Antarctica. The θ(liquid) was altered between 0.007 and 0.035 cm(3) cm(-3) by packing soil cores at different bulk densities. The nutrient supply rate of NH 4+ and NO 3-, as well as gas diffusion coefficient, D(s), were measured at two temperatures, 21°C and -5°C, to correct for bulk density effects. Freezing decreased NSR of both NH 4+ and NO 3-, with θ(liquid) linked to nitrate and ammonia NSR in frozen soil. Similarly for D(s), decreases due to freezing were much more pronounced in soils with low θ(liquid) compared to soils with higher θ(liquid) contents. Additional studies are needed to determine the relationship between degradation rates and θ(liquid) under frozen conditions.

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Microbial community structure and nutrient availability in oil sands reclaimed boreal soils

Cited by 54 publications

References 30 publications

Microbial processes in the Athabasca Oil Sands and their potential applications in microbial enhanced oil recovery

Microbial processes in the Athabasca Oil Sands and their potential applications in microbial enhanced oil recovery

Effect of 40 and 80 Years of Conifer Regrowth on Soil Microbial Activities and Community Structure in Subtropical Low Mountain Forests

Changes in liquid water alter nutrient bioavailability and gas diffusion in frozen antarctic soils contaminated with petroleum hydrocarbons

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