Blog Archives

Team Highlights - Sentinel North Scholarship

5/14/2018

Congratulations to Amine Chaabane, who was awarded a Sentinel North scholarship for international graduate students.

Through this program, Sentinel North seeks to attract new talent, foster the development of young international scientists able to tackle and help resolve complex northern issues, and encourage the sharing of knowledge and experience across borders.

Amine's project aims to study two populations of Arctic char (Salvelinus alpinus) from the North region of Canada and trying to observe the impact of climate change and physiological parameters differences on this microbiota.
For more information about the Sentinel North international scholarship program, click here.

0 Comments

New Publication

5/12/2018

0 Comments

Deleterious interaction between honeybees (Apis mellifera) and its microsporidian intracellular parasite Nosema ceranae was mitigated by administrating either endogenous or allochthonous gut microbiota strains.

Sarah El Khoury, Nicolas Derome, Pierre Giovenazzo, Andrée Rousseau, Alexandre Lecoeur, Pierre-Luc Mercier, Bachar Cheaib, Sidki Bouslama, Vanessa Demey and Mathieu Castex

Frontiers in Ecology and Evolution | doi: 10.3389/fevo.2018.00058
(Full-text will be available on Frontiers soon)

ABSTRACT: Honey bees (Apis mellifera) are facing multiple stressors affecting their lifespan, health and productivity. Among them, Nosema ceranae is an intracellular microsporidian parasite, which plays a major impact on honey bees colonies. However, both efficiency and innocuity of current treatment against N. ceranae are observed, thus raising the urgent need to develop alternative prophylactic and curative strategies. Endogenous microbial...

0 Comments

New Publication in Frontiers

5/9/2018

0 Comments

Source: USGS // Public Domain.

Taxon-Function Decoupling as an Adaptive Signature of Lake Microbial Metacommunities Under a Chronic Polymetallic Pollution Gradient
Bachar Cheaib, Malo Le Boulch, Pierre-Luc Mercier et Nicolas Derome
Frontiers in Microbiology // 03 May 2018

Abstract: Adaptation of microbial communities to anthropogenic stressors can lead to reductions in microbial diversity and disequilibrium of ecosystem services. Such adaptation can change the molecular signatures of communities with differences in taxonomic and functional composition. Understanding the relationship between taxonomic and functional variation remains a critical issue in microbial ecology. Here, we assessed the taxonomic and functional diversity of a lake metacommunity system along a polymetallic pollution gradient caused by 60 years of chronic exposure to acid mine drainage (AMD). Our results highlight three adaptive signatures. First, a signature of taxon—function decoupling was detected in the microbial communities of moderately and highly polluted lakes. Second, parallel shifts in taxonomic composition occurred between polluted and unpolluted lakes. Third, variation in the abundance of functional modules suggested a gradual deterioration of ecosystem services (i.e., photosynthesis) and secondary metabolism in highly polluted lakes. Overall, changes in the abundance of taxa, function, and more importantly the polymetallic resistance genes such as copA, copB, czcA, cadR, cCusA, were correlated with trace metal content (mainly Cadmium) and acidity. Our findings highlight the impact of polymetallic pollution gradient at the lowest trophic levels.

0 Comments

Team Highlights - Sentinel North Scholarship

New Publication

New Publication in Frontiers

Archives

Ⓒ 2014-2020. Website by Jeff Gauthier. All rights reserved to Derome Laboratory.