Keyword search (3,619 papers available)


Role of organic matter and microbial communities in mercury retention and methylation in sediments near run-of-river hydroelectric dams.

Author(s): Millera Ferriz L, Ponton DE, Storck V, Leclerc M, Bilodeau F, Walsh DA, Amyot M

Run-of-river power plants (RoRs) are expected to triple in number over the next decades in Canada. These structures are not anticipated to considerably promote the mobilization and transport of mercury (Hg) and its subsequent microbial transformation to met...

Article GUID: 33609815
A large-scale assessment of lakes reveals a pervasive signal of land use on bacterial communities.

Author(s): Kraemer SA, Barbosa da Costa N, Shapiro BJ, Fradette M, Huot Y, Walsh DA

ISME J. 2020 Aug 07;: Authors: Kraemer SA, Barbosa da Costa N, Shapiro BJ, Fradette M, Huot Y, Walsh DA

Article GUID: 32770118
Modelling Free-Living and Particle-Associated Bacterial Assemblages across the Deep and Hypoxic Lower St. Lawrence Estuary.

Author(s): Cui TT, Dawson TJ, McLatchie S, Dunn K, Bielawski J, Walsh DA

mSphere. 2020 May 20;5(3): Authors: Cui TT, Dawson TJ, McLatchie S, Dunn K, Bielawski J, Walsh DA

Article GUID: 32434843
Diversity and biogeography of SAR11 bacteria from the Arctic Ocean.

Author(s): Kraemer S, Ramachandran A, Colatriano D, Lovejoy C, Walsh DA

ISME J. 2019 Sep 09;: Authors: Kraemer S, Ramachandran A, Colatriano D, Lovejoy C, Walsh DA

Article GUID: 31501503
The NSERC Canadian Lake Pulse Network: A national assessment of lake health providing science for water management in a changing climate.

Author(s): Huot Y, Brown CA, Potvin G, Antoniades D, Baulch HM, Beisner BE, Bélanger S, Brazeau S, Cabana H, Cardille JA, Del Giorgio PA, Gregory-Eaves...

Sci Total Environ. 2019 Aug 04;695:133668 Authors: Huot Y, Brown CA, Potvin G, Antoniades D, Baulch HM, Beisner BE, Bélanger S, Brazeau S, Cabana H, Cardille JA, Del Giorgio PA, Gregory-Eaves...

Article GUID: 31419692
Genomic evidence for the degradation of terrestrial organic matter by pelagic Arctic Ocean Chloroflexi bacteria.

Author(s): Colatriano D, Tran PQ, Guéguen C, Williams WJ, Lovejoy C, Walsh DA

Commun Biol. 2018;1:90 Authors: Colatriano D, Tran PQ, Guéguen C, Williams WJ, Lovejoy C, Walsh DA

Article GUID: 30271971
BioMiCo: a supervised Bayesian model for inference of microbial community structure.

Author(s): Shafiei M, Dunn KA, Boon E, MacDonald SM, Walsh DA, Gu H, Bielawski JP

Microbiome. 2015;3:8 Authors: Shafiei M, Dunn KA, Boon E, MacDonald SM, Walsh DA, Gu H, Bielawski JP

Article GUID: 25774293
A compendium of multi-omic sequence information from the Saanich Inlet water column.

Author(s): Hawley AK, Torres-Beltrán M, Zaikova E, Walsh DA, Mueller A, Scofield M, Kheirandish S, Payne C, Pakhomova L, Bhatia M, Shevchuk O, Gies EA,...

Sci Data. 2017 10 31;4:170160 Authors: Hawley AK, Torres-Beltrán M, Zaikova E, Walsh DA, Mueller A, Scofield M, Kheirandish S, Payne C, Pakhomova L, Bhatia M, Shevchuk O, Gies EA, Fairley D, ...

Article GUID: 29087368
A compendium of geochemical information from the Saanich Inlet water column.

Author(s): Torres-Beltrán M, Hawley AK, Capelle D, Zaikova E, Walsh DA, Mueller A, Scofield M, Payne C, Pakhomova L, Kheirandish S, Finke J, Bhatia M, ...

Sci Data. 2017 10 31;4:170159 Authors: Torres-Beltrán M, Hawley AK, Capelle D, Zaikova E, Walsh DA, Mueller A, Scofield M, Payne C, Pakhomova L, Kheirandish S, Finke J, Bhatia M, Shevchuk O, ...

Article GUID: 29087371
Microbial life under ice: Metagenome diversity and in situ activity of Verrucomicrobia in seasonally ice-covered Lakes.

Author(s): Tran P, Ramachandran A, Khawasik O, Beisner BE, Rautio M, Huot Y, Walsh DA

Environ Microbiol. 2018 Jul;20(7):2568-2584 Authors: Tran P, Ramachandran A, Khawasik O, Beisner BE, Rautio M, Huot Y, Walsh DA

Article GUID: 29921005
Progress and Challenges in Ocean Metaproteomics and Proposed Best Practices for Data Sharing.

Author(s): Saito MA, Bertrand EM, Duffy ME, Gaylord DA, Held NA, Hervey WJ, Hettich RL, Jagtap PD, Janech MG, Kinkade DB, Leary DH, McIlvin MR, Moore E...

J Proteome Res. 2019 Apr 05;18(4):1461-1476 Authors: Saito MA, Bertrand EM, Duffy ME, Gaylord DA, Held NA, Hervey WJ, Hettich RL, Jagtap PD, Janech MG, Kinkade DB, Leary DH, McIlvin MR, Moore EK, ...

Article GUID: 30702898
Annual nitrification dynamics in a seasonally ice-covered lake.

Author(s): Massé S, Botrel M, Walsh DA, Maranger R

PLoS One. 2019;14(3):e0213748 Authors: Massé S, Botrel M, Walsh DA, Maranger R

Article GUID: 30893339
Author Correction: A compendium of geochemical information from the Saanich Inlet water column.

Author(s): Torres-Beltrán M, Hawley AK, Capelle D, Zaikova E, Walsh DA, Mueller A, Scofield M, Payne C, Pakhomova L, Kheirandish S, Finke J, Bhatia M, ...

Sci Data. 2019 01 15;6(1):1 Authors: Torres-Beltrán M, Hawley AK, Capelle D, Zaikova E, Walsh DA, Mueller A, Scofield M, Payne C, Pakhomova L, Kheirandish S, Finke J, Bhatia M, Shevchuk O, Gi...

Article GUID: 30647409
Title:Microbial life under ice: Metagenome diversity and in situ activity of Verrucomicrobia in seasonally ice-covered Lakes.
Authors:Tran P,  Ramachandran A,  Khawasik O,  Beisner BE,  Rautio M,  Huot Y,  Walsh DA
Link:https://www.ncbi.nlm.nih.gov/pubmed/29921005?dopt=Abstract
DOI:10.1111/1462-2920.14283
Category:Environ Microbiol
PMID:29921005
Dept Affiliation: BIOLOGY
1 Department of Biology, Concordia University, 7141 Sherbrooke St. West, Montreal, Quebec, H4B 1R6, Canada.
2 Groupe de Recherche Interuniversitaire en Limnologie et Environnement Aquatique (GRIL), Montréal, Québec, Canada.
3 Département des Sciences Biologiques, Université du Québec à Montréal, Montreal, Québec, Canada.
4 Département des Sciences Fondamentales, Université du Québec à Chicoutimi, Chicoutimi, Québec, Canada.
5 Département de Géomatique Appliquée, Université de Sherbrooke, Sherbrooke, Québec, Canada.

Description:

Microbial life under ice: Metagenome diversity and in situ activity of Verrucomicrobia in seasonally ice-covered Lakes.

Environ Microbiol. 2018 Jul;20(7):2568-2584

Authors: Tran P, Ramachandran A, Khawasik O, Beisner BE, Rautio M, Huot Y, Walsh DA

Abstract

Northern lakes are ice-covered for a large part of the year, yet our understanding of microbial diversity and activity during winter lags behind that of the ice-free period. In this study, we investigated under-ice diversity and metabolism of Verrucomicrobia in seasonally ice-covered lakes in temperate and boreal regions of Quebec, Canada using 16S rRNA sequencing, metagenomics and metatranscriptomics. Verrucomicrobia, particularly the V1, V3 and V4 subdivisions, were abundant during ice-covered periods. A diversity of Verrucomicrobia genomes were reconstructed from Quebec lake metagenomes. Several genomes were associated with the ice-covered period and were represented in winter metatranscriptomes, supporting the notion that Verrucomicrobia are metabolically active under ice. Verrucomicrobia transcriptome analysis revealed a range of metabolisms potentially occurring under ice, including carbohydrate degradation, glycolate utilization, scavenging of chlorophyll degradation products, and urea use. Genes for aerobic sulfur and hydrogen oxidation were expressed, suggesting chemolithotrophy may be an adaptation to conditions where labile carbon may be limited. The expression of genes for flagella biosynthesis and chemotaxis was detected, suggesting Verrucomicrobia may be actively sensing and responding to winter nutrient pulses, such as phytoplankton blooms. These results increase our understanding on the diversity and metabolic processes occurring under ice in northern lakes ecosystems.© 2018 Society for Applied Microbiology and John Wiley & Sons Ltd.

PMID: 29921005 [PubMed - in process]