Marc Johnson (he/him)
@evoecolab.bsky.social
Professor of Biology. Ecology, evolution, genetics, in natural and urban habitats. VP of Canadian Society of Ecology and Evolution. Passionate about connecting kids with nature, advocating for grad students, postdocs, science funding. Proud Canadian!
When your lab dresses up for Halloween as the many versions of their supervisor. It was like looking in a mirror- very spooky! 👻🎃
October 31, 2025 at 5:54 PM
When your lab dresses up for Halloween as the many versions of their supervisor. It was like looking in a mirror- very spooky! 👻🎃
Congrats to our awesome summer undergrads for completing their projects, & to Apekshya, Mariana & Johanna for winning best presentation & poster awards at the undergrad summer research day. You've all learned a lot & we are proud of what you've accomplished @utmbiology.bsky.social @utm.utoronto.ca
August 26, 2025 at 1:18 PM
Congrats to our awesome summer undergrads for completing their projects, & to Apekshya, Mariana & Johanna for winning best presentation & poster awards at the undergrad summer research day. You've all learned a lot & we are proud of what you've accomplished @utmbiology.bsky.social @utm.utoronto.ca
This big chinese mantis (Tenodera sinensis) came to visit our quad on campus today, perhaps in search of a mate. It didn't find a mate but it did find me, and some curious undergrads who exclaimed "WOW, I didn't know we had those in Canada". In fact, they arrived in North America 120 years ago!
August 25, 2025 at 10:54 PM
This big chinese mantis (Tenodera sinensis) came to visit our quad on campus today, perhaps in search of a mate. It didn't find a mate but it did find me, and some curious undergrads who exclaimed "WOW, I didn't know we had those in Canada". In fact, they arrived in North America 120 years ago!
"Urbanization" leads to frequent genome-wide signatures of selection specific to both urban & rural habitats. Read the latest paper from our group led by @jssantangelo.bsky.social & Rob Ness: academic.oup.com/evolut/advan... #urbanecology #urbanevolution 🌎 @utmbiology.bsky.social
August 22, 2025 at 10:49 PM
"Urbanization" leads to frequent genome-wide signatures of selection specific to both urban & rural habitats. Read the latest paper from our group led by @jssantangelo.bsky.social & Rob Ness: academic.oup.com/evolut/advan... #urbanecology #urbanevolution 🌎 @utmbiology.bsky.social
Just me and my Cecropia friend, the largest moth in North America!
July 31, 2025 at 9:23 PM
Just me and my Cecropia friend, the largest moth in North America!
Saved this little guy from being runover by cars at @uoftmississauga.bsky.social and it repaid my kindness by peeing all over my pants-swear it wasn’t me. Ungrateful reptile 🤣
June 20, 2025 at 8:13 PM
Saved this little guy from being runover by cars at @uoftmississauga.bsky.social and it repaid my kindness by peeing all over my pants-swear it wasn’t me. Ungrateful reptile 🤣
I'm grateful and honoured to receive the Credit Valley Conservation Environmental Awareness Award for our community engagement that connects kids with nature through the Riverwood Junior Naturalist programme and Biology In Your Backyard youtube series. Thanks CVC for the great work you do too!
June 20, 2025 at 12:05 PM
I'm grateful and honoured to receive the Credit Valley Conservation Environmental Awareness Award for our community engagement that connects kids with nature through the Riverwood Junior Naturalist programme and Biology In Your Backyard youtube series. Thanks CVC for the great work you do too!
Posted by NSERC president Dr. Alejandro Adem today about grad/pdf scholarships & award harmonization. Further details here: tinyurl.com/mrzjmxzb #phdsky #phdchat
March 13, 2025 at 2:49 AM
Posted by NSERC president Dr. Alejandro Adem today about grad/pdf scholarships & award harmonization. Further details here: tinyurl.com/mrzjmxzb #phdsky #phdchat
Exciting new paper by Jens Ulrich & Risa Sargent: "Urban landscapes with more natural greenspace support higher pollinator diversity." esajournals.onlinelibrary.wiley.com/doi/full/10....
February 25, 2025 at 8:59 PM
Exciting new paper by Jens Ulrich & Risa Sargent: "Urban landscapes with more natural greenspace support higher pollinator diversity." esajournals.onlinelibrary.wiley.com/doi/full/10....
However, there is a stunning decrease in effective population size in recent time across all 3 spp. While this decline starts shortly after deglaciation, the most precipitous decline occurs at the onset of European settlement, extensive deforestation and then widespread intensive urbanization. 3/3
February 15, 2025 at 6:36 PM
However, there is a stunning decrease in effective population size in recent time across all 3 spp. While this decline starts shortly after deglaciation, the most precipitous decline occurs at the onset of European settlement, extensive deforestation and then widespread intensive urbanization. 3/3
This was a large multiyear study, examining population and landscape genetic variation in 3 specialist insects of milkweed across 6 cities. Surprisingly, even though urbanization decreased abundance of some insects, there was no clear effect of urbanization on gene flow or drift 2/3
February 15, 2025 at 6:36 PM
This was a large multiyear study, examining population and landscape genetic variation in 3 specialist insects of milkweed across 6 cities. Surprisingly, even though urbanization decreased abundance of some insects, there was no clear effect of urbanization on gene flow or drift 2/3
Sometimes faculty have to go to extreme measures in @utmbiology.bsky.social to get home after giving a lecture #snowmageddon
February 12, 2025 at 10:59 PM
Sometimes faculty have to go to extreme measures in @utmbiology.bsky.social to get home after giving a lecture #snowmageddon
February 12, 2025 at 2:51 AM
A perfect day to ski on the Credit River
February 6, 2025 at 3:11 PM
A perfect day to ski on the Credit River
#buycanadian: Trump’s tariffs are unnecessary, designed to hurt 🇨🇦 and 🇺🇸, violate existing trade agreements, and disrespect the strongest international friendship. Canadians, here is a list of USA products to avoid at the grocery store & Canadian alternatives. 🙏 to whoever made this
February 2, 2025 at 1:39 PM
#buycanadian: Trump’s tariffs are unnecessary, designed to hurt 🇨🇦 and 🇺🇸, violate existing trade agreements, and disrespect the strongest international friendship. Canadians, here is a list of USA products to avoid at the grocery store & Canadian alternatives. 🙏 to whoever made this
Important new paper just out on the origins & #evolbiol of the London Underground Mosquito Culex p. molestus by @yukihaba.bsky.social @lindymcbr.bsky.social. Spoiler alert: Molestus originated 1000s of years ago in the Middle East www.biorxiv.org/content/bior... #evolviol #urbanevolution
January 31, 2025 at 1:25 PM
Important new paper just out on the origins & #evolbiol of the London Underground Mosquito Culex p. molestus by @yukihaba.bsky.social @lindymcbr.bsky.social. Spoiler alert: Molestus originated 1000s of years ago in the Middle East www.biorxiv.org/content/bior... #evolviol #urbanevolution
In the EvoEco Lab we work hard, but we also play hard #tobaggan #goodtimes
January 25, 2025 at 1:53 AM
In the EvoEco Lab we work hard, but we also play hard #tobaggan #goodtimes
New Paper: I am excited to share this cute paper with my wife @johnsonfamadv. This is the result of a walk along the beach on a warm spring day that led to the discovery of a new butterfly for Canada-Dorantes longtail. Sometimes love & science go together www.cambridge.org/core/journal....
January 24, 2025 at 1:30 PM
New Paper: I am excited to share this cute paper with my wife @johnsonfamadv. This is the result of a walk along the beach on a warm spring day that led to the discovery of a new butterfly for Canada-Dorantes longtail. Sometimes love & science go together www.cambridge.org/core/journal....
Our new EvoEco Lab tshirts are in and they look fabulous. HT to @ellmartin.bsky.social who came up with the design & @hayden-fargo.bsky.social who printed them. Rocking #biology #ecology & #evolbiol
January 21, 2025 at 11:16 PM
Our new EvoEco Lab tshirts are in and they look fabulous. HT to @ellmartin.bsky.social who came up with the design & @hayden-fargo.bsky.social who printed them. Rocking #biology #ecology & #evolbiol
January 21, 2025 at 2:09 AM