Comparative Metagenomics of the Active Layer and Permafrost from Low-Carbon Soil in the Canadian High Arctic

2021 ◽  
Author(s):  
Xiaofen Wu ◽  
Archana Chauhan ◽  
Alice C. Layton ◽  
Maggie C. Y. Lau Vetter ◽  
Brandon T. Stackhouse ◽  
...  
Keyword(s):  
Active Layer ◽  
High Arctic ◽  
Low Carbon ◽  
Canadian High Arctic ◽  
Comparative Metagenomics

scholarly journals Potential shifts in Canadian High Arctic sedimentary organic matter composition with permafrost active layer detachments

2015 ◽  
Vol 79 ◽  
pp. 1-13 ◽  
Author(s):  
David M. Grewer ◽  
Melissa J. Lafrenière ◽  
Scott F. Lamoureux ◽  
Myrna J. Simpson
Keyword(s):  
Organic Matter ◽  
Active Layer ◽  
High Arctic ◽  
Sedimentary Organic Matter ◽  
Canadian High Arctic ◽  
Organic Matter Composition ◽  
Potential Shifts

scholarly journals Water tracks in the High Arctic: a hydrological network dominated by rapid subsurface flow through patterned ground

2017 ◽  
Vol 3 (2) ◽  
pp. 334-353 ◽  
Author(s):  
Michel Paquette ◽  
Daniel Fortier ◽  
Warwick F. Vincent
Keyword(s):  
Active Layer ◽  
Cold Water ◽  
High Arctic ◽  
Canadian High Arctic ◽  
Patterned Ground ◽  
Arctic Water ◽  
Near Surface ◽  
Polar Desert ◽  
Flow Through

Water tracks play a major role in the headwater basin hydrology of permafrost landscapes in Alaska and Antarctica, but less is known about these features in the High Arctic. We examined the physical and hydrological properties of water tracks on Ward Hunt Island, a polar desert site in the Canadian High Arctic, to evaluate their formation process and to compare with water tracks reported elsewhere. These High Arctic water tracks flowed through soils that possessed higher near-surface organic carbon concentrations, higher water content, and coarser material than the surrounding soils. The water track morphology suggested they were initiated by a combination of sorting, differential frost heaving, and eluviation. The resultant network of soil conduits, comparable to soil pipes, dominated the hydrology of the slope. The flow of cold water through these conduits slowed down the progression of the thawing front during summer, making the active layer consistently shallower relative to adjacent soils. Water tracks on Ward Hunt Island, and in polar desert catchments with these features elsewhere in the High Arctic, strongly influence slope hydrology and active-layer properties while also affecting vegetation distribution and the quality of runoff to the downstream lake.

scholarly journals Metagenome-Assembled Genome of USCα AHI, a Potential High-Affinity Methanotroph from Axel Heiberg Island, Canadian High Arctic

2019 ◽  
Vol 8 (46) ◽  
Author(s):  
Calvin Rusley ◽  
Tullis C. Onstott ◽  
Tatiana A. Vishnivetskaya ◽  
Alice Layton ◽  
Archana Chauhan ◽  
...  
Keyword(s):  
Active Layer ◽  
Complete Genome ◽  
Carbon Assimilation ◽  
High Arctic ◽  
Metagenomic Sequencing ◽  
Canadian High Arctic ◽  
Upland Soil ◽  
High Affinity ◽  
Axel Heiberg Island

Metagenomic sequencing of active-layer cryosols from the Canadian High Arctic has yielded a nearly complete genome for an atmospheric CH4-oxidizing bacterium belonging to upland soil cluster α (USCα). This genome contains genes involved in CH4 metabolism, H2 metabolism, and multiple carbon assimilation pathways.

Stable isotopic evidence of enhanced export of microbially derived $${\text{NO}}_{3}^{ - }$$ NO 3 - following active layer slope disturbance in the Canadian High Arctic

2014 ◽  
Vol 121 (3) ◽  
pp. 565-580 ◽  
Author(s):  
Nicole L. Louiseize ◽  
Melissa J. Lafrenière ◽  
Meredith G. Hastings
Keyword(s):  
Active Layer ◽  
High Arctic ◽  
Canadian High Arctic ◽  
Isotopic Evidence ◽  
Stable Isotopic

scholarly journals Thaumarchaea Genome Sequences from a High Arctic Active Layer

2020 ◽  
Vol 9 (21) ◽  
Author(s):  
Emily Wei-Hsin Sun ◽  
Sassan Hajirezaie ◽  
Mackenzie Dooner ◽  
Tatiana A. Vishnivetskaya ◽  
Alice Layton ◽  
...  
Keyword(s):  
Active Layer ◽  
High Arctic ◽  
Metagenomic Data ◽  
Data Sets ◽  
Ammonia Oxidizers ◽  
Canadian High Arctic ◽  
Genome Sequences ◽  
Terrestrial Environments

ABSTRACT The role of archaeal ammonia oxidizers often exceeds that of bacterial ammonia oxidizers in marine and terrestrial environments but has been understudied in permafrost, where thawing has the potential to release ammonia. Here, three thaumarchaea genomes were assembled and annotated from metagenomic data sets from carbon-poor Canadian High Arctic active-layer cryosols.

Differences in Riverine and Pond Water Dissolved Organic Matter Composition and Sources in Canadian High Arctic Watersheds Affected by Active Layer Detachments

2018 ◽  
Vol 52 (3) ◽  
pp. 1062-1071 ◽  
Author(s):  
Jun-Jian Wang ◽  
Melissa J. Lafrenière ◽  
Scott F. Lamoureux ◽  
André J. Simpson ◽  
Yves Gélinas ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Active Layer ◽  
Pond Water ◽  
High Arctic ◽  
Canadian High Arctic ◽  
Organic Matter Composition

Structural variation in the songs of Atlantic walruses breeding in the Canadian High Arctic

2003 ◽  
Vol 29 (2) ◽  
pp. 297-318 ◽  
Author(s):  
Becky Sjare ◽  
Ian Stirling ◽  
Cheryl Spencer
Keyword(s):  
Structural Variation ◽  
High Arctic ◽  
Canadian High Arctic

In situ optical and microphysical properties of tropospheric aerosols in the Canadian High Arctic from 2016 to 2019

2021 ◽  
Vol 250 ◽  
pp. 118254
Author(s):  
Andy Vicente-Luis ◽  
Samantha Tremblay ◽  
Joelle Dionne ◽  
Rachel Y.-W. Chang ◽  
Pierre F. Fogal ◽  
...  
Keyword(s):  
High Arctic ◽  
Canadian High Arctic ◽  
Microphysical Properties ◽  
Tropospheric Aerosols
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