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Skip to Search Results- 1Bramucci, Anna
- 1Hammad, Ann O
- 1Hatam, Ido
- 1Kazemi, Sina
- 1Saidi-Mehrabad, Alireza
- 1Santana Martinez, Juan Camilo
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Spring 2016
The Arctic Ocean sea ice is shifting from a system dominated by thick perennial ice (multiyear ice –MYI) to one dominated by thinner, seasonal ice (first year ice – FYI). The effects of this shift on the bacterial constituents of the Arctic sea ice have been grossly under studied, although it is...
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Effect of climate change on permafrost microbiome at the Pleistocene-Holocene and Holocene-Anthropocene transitions
DownloadSpring 2021
Understanding past and future responses of Arctic soil microbes to climate change is critical to an understanding of ecosystem function and climate change feedbacks; the goal of my thesis was to obtain a clearer understanding of these feedbacks. The remnants of the Pleistocene and early Holocene...
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Fall 2023
Global melting of mountain glaciers is altering downstream ecosystems. As glaciers disappear, downstream water temperatures are rising while turbidity and nutrient concentrations decline. Here, knowledge gaps exist concerning how these abiotic changes will affect primary producers in glacial...
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Microbial community dynamics from permafrost across the Pleistocene-Holocene boundary and response to abrupt climate change
DownloadFall 2015
Permafrost houses active microbial communities adapted to constant sub-zero temperatures and anaerobic conditions. These extreme conditions make permafrost an excellent archive for long-term DNA preservation. Recent studies in the laboratory have shown a shift in permafrost bacterial communities...
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Microbial Community Dynamics in the Hydraulic Fracturing Water Cycle from Two Newly Fractured Shale Gas Wells in the Duvernay Formation, Alberta
DownloadFall 2017
The microbial ecology of the hydraulic fracturing water cycle may influence the efficiency of shale gas production and strategies for water reuse and treatment. In this study, microbial community dynamics were tracked by sequencing of 16S rRNA genes coupled with enumeration of live/dead cells in...
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Fall 2015
Alpine glaciers have been retreating since the Little Ice Age, leading to exposure of foreland soils. Microorganisms are the primary below ground biological influence on nutrient cycling in recently deglaciated soil and are linked to down valley vegetation colonization. Previous studies...
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Structure and Stability of Microbial Assemblages in Seasonal Lake Ice: Miquelon Lake, Alberta, Canada
DownloadFall 2012
Prokaryotic life has been identified in every terrestrial icy/frozen environment studied to date. There is evidence of microbial activity and replication within ice as well, but there has been little research done on the seasonally frozen portion of the cryosphere. The present study focuses on...
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The Impact of Reclamation and Vegetation Removal on Compositional and Functional Attributes of Soil Microbial Communities in the Athabasca Oil Sands Region
DownloadSpring 2021
Large-scale mining for oil extraction in the boreal forests of Northern Alberta has led to a disturbance footprint of ~ 900 km2 of land; which, under regulations from the government of Alberta, must be reclaimed to equivalent land capabilities using soil materials salvaged and conserved during...