Mary-Cathrine Leewis
@mcleewis.bsky.social
Research Scientist @ AAC Québec 🇨🇦
microbial ecology | plant-soil-micro interactions | agroecology | permafrost | views here are my own
microbial ecology | plant-soil-micro interactions | agroecology | permafrost | views here are my own
We’re recruiting!
New two-years MSc position U Laval, co-directed by @leducq-lab.bsky.social as part of the PLQ Laboratoire Vivant. Project explores how recurrent selection of switch grass influences associated plant and soil microbiomes. More info - email with "Switchgrass MS" in the subject line
New two-years MSc position U Laval, co-directed by @leducq-lab.bsky.social as part of the PLQ Laboratoire Vivant. Project explores how recurrent selection of switch grass influences associated plant and soil microbiomes. More info - email with "Switchgrass MS" in the subject line
November 12, 2025 at 7:32 PM
We’re recruiting!
New two-years MSc position U Laval, co-directed by @leducq-lab.bsky.social as part of the PLQ Laboratoire Vivant. Project explores how recurrent selection of switch grass influences associated plant and soil microbiomes. More info - email with "Switchgrass MS" in the subject line
New two-years MSc position U Laval, co-directed by @leducq-lab.bsky.social as part of the PLQ Laboratoire Vivant. Project explores how recurrent selection of switch grass influences associated plant and soil microbiomes. More info - email with "Switchgrass MS" in the subject line
Reposted by Mary-Cathrine Leewis
📢 PLEASE RT!
❄️ M2 Masters Internship: Metagenomic analysis of microbial cold adaptation in the cryosphere
🧬 Compile & curate ice nucleation & cold-adaptation protein database
🖥️ Build HMM profiles
🦠 Analyze existing metagenomic data using HMMs
☀️ Marseille, France
Apply by 15 Oct
❄️ M2 Masters Internship: Metagenomic analysis of microbial cold adaptation in the cryosphere
🧬 Compile & curate ice nucleation & cold-adaptation protein database
🖥️ Build HMM profiles
🦠 Analyze existing metagenomic data using HMMs
☀️ Marseille, France
Apply by 15 Oct
September 15, 2025 at 11:48 AM
📢 PLEASE RT!
❄️ M2 Masters Internship: Metagenomic analysis of microbial cold adaptation in the cryosphere
🧬 Compile & curate ice nucleation & cold-adaptation protein database
🖥️ Build HMM profiles
🦠 Analyze existing metagenomic data using HMMs
☀️ Marseille, France
Apply by 15 Oct
❄️ M2 Masters Internship: Metagenomic analysis of microbial cold adaptation in the cryosphere
🧬 Compile & curate ice nucleation & cold-adaptation protein database
🖥️ Build HMM profiles
🦠 Analyze existing metagenomic data using HMMs
☀️ Marseille, France
Apply by 15 Oct
Reposted by Mary-Cathrine Leewis
Please share: @UBCScience is searching for 15 TT faculty in diverse areas of expertise science.ubc.ca/about/careers. Included are 2 positions in Quantitative and Environmental Science as part of a hiring cluster for black faculty; you will join 6 current UBC faculty science.ubc.ca/blackscholars.
October 27, 2023 at 8:00 PM
Please share: @UBCScience is searching for 15 TT faculty in diverse areas of expertise science.ubc.ca/about/careers. Included are 2 positions in Quantitative and Environmental Science as part of a hiring cluster for black faculty; you will join 6 current UBC faculty science.ubc.ca/blackscholars.
Reposted by Mary-Cathrine Leewis
New pre-print from my group - project led by PhD student Michael Hoffert. We set out on a daunting mission to generate a 'periodic table' of bacterial diversity (1/6) www.biorxiv.org/content/10.1...
A periodic table of bacteria?: Mapping bacterial diversity in trait space
Bacterial diversity can be overwhelming. There is an ever-expanding number of bacterial taxa being discovered, but many of these taxa remain uncharacterized with unknown traits and environmental prefe...
www.biorxiv.org
July 18, 2025 at 4:44 PM
New pre-print from my group - project led by PhD student Michael Hoffert. We set out on a daunting mission to generate a 'periodic table' of bacterial diversity (1/6) www.biorxiv.org/content/10.1...
Reposted by Mary-Cathrine Leewis
Please share!
Amazing opportunity at @mcgill.ca
We are looking to recruit an internationally recognized, interdisciplinary scientist with a strong track record in innovation and research to direct a new program in climate, environment, and health
mcgill.wd3.myworkdayjobs.com/en-US/McGill...
Amazing opportunity at @mcgill.ca
We are looking to recruit an internationally recognized, interdisciplinary scientist with a strong track record in innovation and research to direct a new program in climate, environment, and health
mcgill.wd3.myworkdayjobs.com/en-US/McGill...
July 17, 2025 at 10:38 AM
Please share!
Amazing opportunity at @mcgill.ca
We are looking to recruit an internationally recognized, interdisciplinary scientist with a strong track record in innovation and research to direct a new program in climate, environment, and health
mcgill.wd3.myworkdayjobs.com/en-US/McGill...
Amazing opportunity at @mcgill.ca
We are looking to recruit an internationally recognized, interdisciplinary scientist with a strong track record in innovation and research to direct a new program in climate, environment, and health
mcgill.wd3.myworkdayjobs.com/en-US/McGill...
Reposted by Mary-Cathrine Leewis
📢The Global Soil Biodiversity Conference 2026 abstract submission deadline has been EXTENDED 🐛🐜🕷️🦠🪱
Abstracts are NOW due AUGUST 15th 23:59 PDT‼️
Submit an abstract 👇
globalsoilbiodiversity2026.org/abstract/
Abstracts are NOW due AUGUST 15th 23:59 PDT‼️
Submit an abstract 👇
globalsoilbiodiversity2026.org/abstract/
Call for Abstracts - Global Soil Biodiversity Conference 2026
Abstract Submissions NOW OPEN The Program Committee is proud to announce that the submission of abstracts for the 4th Global Soil Biodiversity Conference (GSB2026) is now open! Submission deadline is…
globalsoilbiodiversity2026.org
July 15, 2025 at 7:01 AM
📢The Global Soil Biodiversity Conference 2026 abstract submission deadline has been EXTENDED 🐛🐜🕷️🦠🪱
Abstracts are NOW due AUGUST 15th 23:59 PDT‼️
Submit an abstract 👇
globalsoilbiodiversity2026.org/abstract/
Abstracts are NOW due AUGUST 15th 23:59 PDT‼️
Submit an abstract 👇
globalsoilbiodiversity2026.org/abstract/
New publication with @cynkallenbach.bsky.social and MS Student Rachael: esajournals.onlinelibrary.wiley.com/doi/10.1002/...
Floodplain land use gradients have a stronger effect on soil microbial enzyme activity than spatiotemporal variability
Climate change is leading to flood events with higher frequency and longer duration. Changes in seasonal flooding that affect water saturation of soils can impact soil microbial extracellular enzyme ...
esajournals.onlinelibrary.wiley.com
July 11, 2025 at 1:28 PM
New publication with @cynkallenbach.bsky.social and MS Student Rachael: esajournals.onlinelibrary.wiley.com/doi/10.1002/...
Reposted by Mary-Cathrine Leewis
📢The Global Soil Biodiversity Conference 2026 abstract submission deadline is coming up quickly 🐛🐜🕷️🦠🪱
Abstracts are due July 15th 23:59 PDT ‼️
Submit an abstract 👇
globalsoilbiodiversity2026.org/abstract/
@gsb2026.bsky.social
Abstracts are due July 15th 23:59 PDT ‼️
Submit an abstract 👇
globalsoilbiodiversity2026.org/abstract/
@gsb2026.bsky.social
Call for Abstracts - Global Soil Biodiversity Conference 2026
Abstract Submissions NOW OPEN The Program Committee is proud to announce that the submission of abstracts for the 4th Global Soil Biodiversity Conference (GSB2026) is now open! Submission deadline is ...
globalsoilbiodiversity2026.org
June 30, 2025 at 3:47 PM
📢The Global Soil Biodiversity Conference 2026 abstract submission deadline is coming up quickly 🐛🐜🕷️🦠🪱
Abstracts are due July 15th 23:59 PDT ‼️
Submit an abstract 👇
globalsoilbiodiversity2026.org/abstract/
@gsb2026.bsky.social
Abstracts are due July 15th 23:59 PDT ‼️
Submit an abstract 👇
globalsoilbiodiversity2026.org/abstract/
@gsb2026.bsky.social
Reposted by Mary-Cathrine Leewis
I'll never get over this poem a child wrote with one of my poetry prompts.
May 29, 2025 at 2:25 PM
I'll never get over this poem a child wrote with one of my poetry prompts.
Reposted by Mary-Cathrine Leewis
SFU invites applications from world renowned researchers for the prestigious Canada Excellence Research Chairs (CERC) 2026 Competition. Please see the ad to see if you qualify. In Vancouver, BC
www.sfu.ca/vpacademic/a...
www.sfu.ca/vpacademic/a...
Canada Excellence Research Chairs (CERC) 2026 Competition
www.sfu.ca
May 28, 2025 at 4:18 AM
SFU invites applications from world renowned researchers for the prestigious Canada Excellence Research Chairs (CERC) 2026 Competition. Please see the ad to see if you qualify. In Vancouver, BC
www.sfu.ca/vpacademic/a...
www.sfu.ca/vpacademic/a...
Reposted by Mary-Cathrine Leewis
We are looking for a Canada Excellence Research Chair (CERC) in Community Ecology, Biological Invasions, Allelopathy, and Plant-Soil Feedbacks.
Details here:
universityaffairs.ca/search-job/?...
Details here:
universityaffairs.ca/search-job/?...
Search Jobs - University Affairs
universityaffairs.ca
May 16, 2025 at 3:57 PM
We are looking for a Canada Excellence Research Chair (CERC) in Community Ecology, Biological Invasions, Allelopathy, and Plant-Soil Feedbacks.
Details here:
universityaffairs.ca/search-job/?...
Details here:
universityaffairs.ca/search-job/?...
Reposted by Mary-Cathrine Leewis
Racist and sexist roots in the cancellation of NSF grants under Trump:
Grants with female PIs canceled 2x more than men
Grants with Black PIs canceled 4x over White PIs
Grants with Hispanic PIs canceled 2x over White PIs
Grants with PIs with disabilities canceled 2x more than without
Grants with female PIs canceled 2x more than men
Grants with Black PIs canceled 4x over White PIs
Grants with Hispanic PIs canceled 2x over White PIs
Grants with PIs with disabilities canceled 2x more than without
Another scoop from Jeff Mervis (@policyhound.bsky.social): NSF's ~1400 grant terminations have disproportionately affected PIs from groups underrepresented in science: women, racial & ethnic minorities, & those with disabilities. 1/3
www.science.org/content/arti...
www.science.org/content/arti...
Trump officials take steps toward a radically different NSF
Efforts to shrink staff, budget, and focus have alarmed members of Congress
www.science.org
May 13, 2025 at 9:29 PM
Racist and sexist roots in the cancellation of NSF grants under Trump:
Grants with female PIs canceled 2x more than men
Grants with Black PIs canceled 4x over White PIs
Grants with Hispanic PIs canceled 2x over White PIs
Grants with PIs with disabilities canceled 2x more than without
Grants with female PIs canceled 2x more than men
Grants with Black PIs canceled 4x over White PIs
Grants with Hispanic PIs canceled 2x over White PIs
Grants with PIs with disabilities canceled 2x more than without
Reposted by Mary-Cathrine Leewis
The Research Council of Finland is planning a new funding call to help universities recruit international experts to Finland. The call has a preliminary total budget of 50 million€, which will be granted for recruitment supporting the research profiling of Finnish universities between 2026 and 2030.
RCF preparing call for universities to invite foreign researchers to Finland
The Research Council of Finland (RCF) is planning a new funding call to help universities recruit international experts to Finland. The call would be part of the RCF funding scheme that strengthens un...
www.aka.fi
March 27, 2025 at 1:31 PM
The Research Council of Finland is planning a new funding call to help universities recruit international experts to Finland. The call has a preliminary total budget of 50 million€, which will be granted for recruitment supporting the research profiling of Finnish universities between 2026 and 2030.
Reposted by Mary-Cathrine Leewis
Barbara Howard was a gifted athlete who became the first Black woman to represent Canada in an international competition.
She then became the first visible minority hired by the Vancouver School Board.
This is her story.
🧵1/8
She then became the first visible minority hired by the Vancouver School Board.
This is her story.
🧵1/8
May 8, 2025 at 1:12 PM
Barbara Howard was a gifted athlete who became the first Black woman to represent Canada in an international competition.
She then became the first visible minority hired by the Vancouver School Board.
This is her story.
🧵1/8
She then became the first visible minority hired by the Vancouver School Board.
This is her story.
🧵1/8
Reposted by Mary-Cathrine Leewis
Canada Excellence Research Chair opportunity to recruit top international scientists to Canada.
Come join us in Nova Scotia at Dalhousie University !
Reach out if you have questions.
www.dal.ca/research-and...
@dalhousie.bsky.social
Come join us in Nova Scotia at Dalhousie University !
Reach out if you have questions.
www.dal.ca/research-and...
@dalhousie.bsky.social
The CERC opportunity
Explore Dalhousie’s online community hub—your go-to resource for connections, opportunities, and support available at Dal. Stay informed and engaged.
www.dal.ca
May 7, 2025 at 8:02 PM
Canada Excellence Research Chair opportunity to recruit top international scientists to Canada.
Come join us in Nova Scotia at Dalhousie University !
Reach out if you have questions.
www.dal.ca/research-and...
@dalhousie.bsky.social
Come join us in Nova Scotia at Dalhousie University !
Reach out if you have questions.
www.dal.ca/research-and...
@dalhousie.bsky.social
Reposted by Mary-Cathrine Leewis
Looking for a database to functionally assign your 18S (terrestrial)data to trophic groups? Look no further! Our article is published here: doi.org/10.1111/1755... and you can find the database here as a R package: github.com/lentendu/Euk... #soils #eukaryotes #protists #fungi
EukFunc: A Holistic Eukaryotic Functional Reference for Automated Profiling of Soil Eukaryotes
The soil eukaryome constitutes a significant portion of Earth's biodiversity that drives major ecosystem functions, such as controlling carbon fluxes and plant performance. Currently, however, we mis...
doi.org
May 6, 2025 at 8:04 AM
Looking for a database to functionally assign your 18S (terrestrial)data to trophic groups? Look no further! Our article is published here: doi.org/10.1111/1755... and you can find the database here as a R package: github.com/lentendu/Euk... #soils #eukaryotes #protists #fungi
Reposted by Mary-Cathrine Leewis
I'm seeking graduate students interested in studying nectar evolutionary ecology. Masters or PhD. Sep 2025 or Jan 2026 start. Interested students encouraged to apply by May 5 to be eligible for additional scholarships. #gradschool #flower #evolution #nectar #pollination
April 17, 2025 at 10:01 AM
I'm seeking graduate students interested in studying nectar evolutionary ecology. Masters or PhD. Sep 2025 or Jan 2026 start. Interested students encouraged to apply by May 5 to be eligible for additional scholarships. #gradschool #flower #evolution #nectar #pollination
Reposted by Mary-Cathrine Leewis
How can zombie microbes interact with the Earth system? 🦠🧟🌎
Microbes, even when dormant, play a massive role in shaping Earth's ecosystems & biogeochemistry 🌎
In @natcomms.nature.com I explore dormancy in the context of Earth’s geosphere-biosphere co-evolution
🧵👇
www.nature.com/articles/s41...
Microbes, even when dormant, play a massive role in shaping Earth's ecosystems & biogeochemistry 🌎
In @natcomms.nature.com I explore dormancy in the context of Earth’s geosphere-biosphere co-evolution
🧵👇
www.nature.com/articles/s41...
Microbial dormancy as an ecological and biogeochemical regulator on Earth - Nature Communications
Dormancy enables microbes to withstand periods of environmental harshness. It occurs throughout diverse ecosystems and spans vast timescales, and could play an important role in shaping the co-ev...
www.nature.com
April 28, 2025 at 9:15 AM
How can zombie microbes interact with the Earth system? 🦠🧟🌎
Microbes, even when dormant, play a massive role in shaping Earth's ecosystems & biogeochemistry 🌎
In @natcomms.nature.com I explore dormancy in the context of Earth’s geosphere-biosphere co-evolution
🧵👇
www.nature.com/articles/s41...
Microbes, even when dormant, play a massive role in shaping Earth's ecosystems & biogeochemistry 🌎
In @natcomms.nature.com I explore dormancy in the context of Earth’s geosphere-biosphere co-evolution
🧵👇
www.nature.com/articles/s41...
Reposted by Mary-Cathrine Leewis
With all sincerity, Elections Canada is a national treasure.
- Voting typically takes less than 15 minutes
- We make it easy for citizens to vote, without cumbersome registration hurdles
- We have every reason to trust that ballots will be counted fairly, and results reported swiftly
- Voting typically takes less than 15 minutes
- We make it easy for citizens to vote, without cumbersome registration hurdles
- We have every reason to trust that ballots will be counted fairly, and results reported swiftly
April 28, 2025 at 6:03 PM
With all sincerity, Elections Canada is a national treasure.
- Voting typically takes less than 15 minutes
- We make it easy for citizens to vote, without cumbersome registration hurdles
- We have every reason to trust that ballots will be counted fairly, and results reported swiftly
- Voting typically takes less than 15 minutes
- We make it easy for citizens to vote, without cumbersome registration hurdles
- We have every reason to trust that ballots will be counted fairly, and results reported swiftly
Reposted by Mary-Cathrine Leewis
I am very happy (and anxious) to share with you our most recent work in which we evaluated four of the most popular long-read assemblers,
www.biorxiv.org/content/10.1...
and tell you just a little bit about it in the following 🧵
www.biorxiv.org/content/10.1...
and tell you just a little bit about it in the following 🧵
Assemblies of long-read metagenomes suffer from diverse errors
Genomes from metagenomes have revolutionised our understanding of microbial diversity, ecology, and evolution, propelling advances in basic science, biomedicine, and biotechnology. Assembly algorithms...
www.biorxiv.org
April 28, 2025 at 8:08 AM
I am very happy (and anxious) to share with you our most recent work in which we evaluated four of the most popular long-read assemblers,
www.biorxiv.org/content/10.1...
and tell you just a little bit about it in the following 🧵
www.biorxiv.org/content/10.1...
and tell you just a little bit about it in the following 🧵
Reposted by Mary-Cathrine Leewis
Come join us at @mcgill.ca as an assistant professor in virus-host interactions! Please share widely.
mcgill.wd3.myworkdayjobs.com/en-US/McGill...
mcgill.wd3.myworkdayjobs.com/en-US/McGill...
Assistant Professor (Research), Department of Microbiology & Immunology, (C2-240724)
Please refer to the How to Apply for a Job (for External Candidates) job aid for instructions on how to apply. If you are an active McGill employee (ie: currently in an active contract or position at ...
mcgill.wd3.myworkdayjobs.com
April 24, 2025 at 8:17 PM
Come join us at @mcgill.ca as an assistant professor in virus-host interactions! Please share widely.
mcgill.wd3.myworkdayjobs.com/en-US/McGill...
mcgill.wd3.myworkdayjobs.com/en-US/McGill...
Reposted by Mary-Cathrine Leewis
I am teaching my phd writing workshop course this quarter, question: are there any words/phrases said to you by an advisor/mentor that stuck with you, were memorable, or particularly helpful? If so please reply below!
April 23, 2025 at 7:45 PM
I am teaching my phd writing workshop course this quarter, question: are there any words/phrases said to you by an advisor/mentor that stuck with you, were memorable, or particularly helpful? If so please reply below!
Reposted by Mary-Cathrine Leewis
Attention climate scholars seeking to leave the US: Next year the University of Ottawa will be seeking int'l candidates for a Canada Excellence Research Chair in "Climate and Societal Solutions" (broadly defined) They'll seek established scholars with global reach in this area (see below)...
April 23, 2025 at 3:06 PM
Attention climate scholars seeking to leave the US: Next year the University of Ottawa will be seeking int'l candidates for a Canada Excellence Research Chair in "Climate and Societal Solutions" (broadly defined) They'll seek established scholars with global reach in this area (see below)...
Reposted by Mary-Cathrine Leewis
Thrilled to see our new paper "Climate Change, Extreme Weather Events, Food Security, and Nutrition: Evolving Relationships and Critical Challenges" in the Annual Review of Nutrition! Check it out! shorturl.at/qHxNz
April 21, 2025 at 8:54 AM
Thrilled to see our new paper "Climate Change, Extreme Weather Events, Food Security, and Nutrition: Evolving Relationships and Critical Challenges" in the Annual Review of Nutrition! Check it out! shorturl.at/qHxNz