Biology Archives - Faculty of Science /science/category/biology/ 91亚色 Science is a hub of research and teaching excellence. Fri, 14 Nov 2025 13:35:00 +0000 en-US hourly 1 https://wordpress.org/?v=6.9.4 Provincial recognition for 91亚色 U early-career researchers /science/2025/05/21/provincial-recognition-for-york-u-early-career-researchers/ Wed, 21 May 2025 12:51:22 +0000 /science/?p=38311 91亚色 professors Kohitij Kar has received Ontario鈥檚 Early Researcher Award, a competitive provincial honour that supports promising early-career faculty leading innovative research. The Early Researcher Award recognizes faculty at publicly funded Ontario institutions within their first 10 years of an academic career. It supports advancing knowledge and building strong teams of graduate and undergraduate trainees to […]

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91亚色 professors Kohitij Kar has received Ontario鈥檚 Early Researcher Award, a competitive provincial honour that supports promising early-career faculty leading innovative research.

The Early Researcher Award recognizes faculty at publicly funded Ontario institutions within their first 10 years of an academic career. It supports advancing knowledge and building strong teams of graduate and undergraduate trainees to develop future research leaders in Ontario.

Kar, a professor of biology in the Faculty of Science and Canada Research Chair in Visual Neuroscience, received the Early Researcher Award for work exploring how the brain might process sensory information differently in autistic adults, focusing on how they see and understand the world.

Kohitji Kar

Kohitij Kar By combining computer simulations with brain activity studies, the team models how changes in specific brain areas might lead to autism-like behaviours, specifically by adding controlled 鈥渘oise.鈥 The findings aim to enhance diagnosis and develop more effective support strategies, reinforcing Ontario鈥檚 investment in autism services and assisting community organizations.

鈥淭here is an urgent need to develop testable computational models of the neural basis of autism, particularly the sensory differences,鈥 says Kar. 鈥淭his award is a critical boost for our project, allowing us to expand our research and accelerate the development of tools that can better understand sensory processing differences in autism. It brings us closer to real-world impact for individuals and families affected by autism.鈥

Kar鈥檚 current project builds on his award-winning work studying visual object processing. His research appears in leading journals including Nature Neuroscience and Science. He leads a research program at 91亚色 and has earned awards such as the Future Leaders in Canadian Brain Research Award. His combined expertise in neuroscience and artificial intelligence makes him well positioned to lead this innovative effort.

The achievement reflects 91亚色鈥檚 growing leadership in interdisciplinary research with real-world impact, says Amir Asif, vice-president research and innovation.

Courtesy of YFile

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91亚色 professor pioneers podcast-based learning in biology /science/2025/03/20/york-professor-pioneers-podcast-based-learning-in-biology/ Thu, 20 Mar 2025 12:55:06 +0000 /science/?p=37717 Professor Elizabeth Clare had long eschewed textbooks for her biology students before she discovered the magic of podcasting. Now, she鈥檚 made a mark as a pioneer in the science podcast space, offering students and other learners accessible, easy-to-digest lessons in biology.  For the last two years, the associate professor in 91亚色鈥檚 Department of Biology in the […]

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Professor Elizabeth Clare had long eschewed textbooks for her biology students before she discovered the magic of podcasting. Now, she鈥檚 made a mark as a pioneer in the science podcast space, offering students and other learners accessible, easy-to-digest lessons in biology. 

For the last two years, the associate professor in 91亚色鈥檚 Department of Biology in the Faculty of Science has been busy supplementing classroom learning with her podcast, 鈥.鈥&苍产蝉辫;&苍产蝉辫;

Elizabeth Clare
Elizabeth Clare

Her 33 episodes 鈥 hosted on BuzzSprout and available free on Apple and Spotify 鈥 cover topics from her biology classes and feature interviews with an expert or former student. The podcasts have been downloaded more than 18,000 times in 71 countries, with 91亚色 students making up roughly 80 per cent of the listeners. 

Her podcasting started almost by accident, Clare says. She was teaching in England and one of her classes became fascinated by transposable elements, also known as jumping genes. It鈥檚 an obscure topic, Clare says, and not her area of specialization, but she happened to have a friend who earned his PhD studying the topic. She asked him to speak to the class over Skype.  

鈥淲e spent an hour peppering him with questions,鈥 Clare says. 鈥淭he students loved it.鈥&苍产蝉辫;&苍产蝉辫;

Next, Clare invited another friend 鈥 a scientific author 鈥 to talk to students about their work. The students then started asking for experts on various topics, and Clare began taping these talks. When she joined 91亚色 in 2021, some of her students requested podcasts; Clare found that appealing because it showed students were driving a shift in learning and deciding how they wanted to access information. 

鈥淚鈥檝e always been a bit frustrated by textbooks. I don't really like teaching from a textbook. It鈥檚 there if we need it, but students are looking for novel sources of information,鈥 she says. 鈥淚 like science the way I teach it. I like it as a story you can tell, and this just fits with the podcast format.鈥

BioAudio 鈥 a teaching podcast.

In Clare鈥檚 first-year classes, students use both a textbook and the podcast; however, in upper-year classes, she鈥檚 stopped relying on textbooks and no longer assigns traditional text readings.  

鈥淪cience, particularly at an advanced level, changes fast. Textbooks can鈥檛 always keep up when you are teaching new research stories.鈥&苍产蝉辫;&苍产蝉辫;

Teaching by podcast is a great leveller: students don鈥檛 have to buy a $200 textbook; podcasts are free; and it turns out, podcasts are helpful for students with specific learning disabilities, Clare says.  

One student told Clare, 鈥淚 simply can鈥檛 sit down and read a chapter of a text. But I can put this on a loop and ride my bike.鈥&苍产蝉辫;&苍产蝉辫;

鈥淭he funny thing is the students really love it. I thought they would find it fun. It's fun for me to make,鈥 Clare says. 鈥淏ut I didn鈥檛 think they would come to rely on it the way they do. What I had not anticipated was the number of students, in that first year where I really got going with it, who came up and said, 鈥榊ou don't understand, this is an equity issue.鈥欌 

Other student feedback has been extremely positive, Clare says, and they continue to request more content. Some have even offered to help make more episodes.  

Christian Nakla is one of those students. He鈥檚 a fourth-year biology student who was in Clare鈥檚 third-year biology class on evolution where, says Clare, he became known as the 鈥淨uestion Guy鈥 for asking so many questions. He helped create a podcast episode on reproductive barriers and isolation for Clare鈥檚 first-year biology class. The  explains how reproductive barriers prevent interbreeding between populations.  

Nakla says making the podcast was rewarding. He is particularly pleased that BioAudio is accessible for non-students and says because it simplifies complex scientific concepts the information is easy for beginners to understand.  

鈥淚 think this is a very noble effort to bring this sort of knowledge to students but also to people who are not necessarily enrolled at 91亚色 in science,鈥 he says.  

Encouraging students to be enthusiastic about science is part of what drives this effort for Clare. And it鈥檚 working.  

鈥淎pparently, last year, in my third-year class, there were groups of students getting together on Friday nights and having podcast parties.鈥&苍产蝉辫;&苍产蝉辫;

She鈥檚 witnessed first-hand how podcasting, as a resource, is growing. Recently, Clare received an email from a professor in another country who said she鈥檇 discovered BioAudio and asked to use the podcast as a teaching aid.  

鈥淥K?鈥 says Clare. 鈥淚t鈥檚 great. I鈥檇 love for others to find it valuable. When I got the idea for this, I figured there was already something available. I went looking, but there was just nothing in the podcast world on this topic. So, I had to make it myself. But if I鈥檝e now filled the gap for someone else, that鈥檚 really cool.鈥&苍产蝉辫;&苍产蝉辫; 

This week鈥檚 episode is 鈥淔ossils, Rocks and Radioactive Clocks.鈥 It explores how scientists date ancient events through a discussion with mammal paleontologist Mathew Jones and can be found  or free on other podcast platforms.鈥 

With files from Julie Carl

Courtesy of聽YFile

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Cutting-edge brain research technology drives experiential education for 91亚色 U students /science/2025/02/28/cutting-edge-brain-research-technology-drives-experiential-education-for-york-u-students/ Fri, 28 Feb 2025 18:49:00 +0000 /science/?p=37241 91亚色 Science students had a rare opportunity to work with cutting-edge brain imaging technology used in both research and clinical settings thanks to a $150,000 collaboration with NIRx Medical Technologies. The week-long learning opportunity in the fourth-year course Biophysical Techniques (BPHS 4090; Biomedical Physics Program) provided students with access to the NIRSport 2, a high-tech […]

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91亚色 Science students had a rare opportunity to work with cutting-edge brain imaging technology used in both research and clinical settings thanks to a $150,000 collaboration with NIRx Medical Technologies.

The week-long learning opportunity in the fourth-year course Biophysical Techniques (BPHS 4090; Biomedical Physics Program) provided students with access to the NIRSport 2, a high-tech portable brain imaging device that uses light to measure blood oxygenation, pooling and brain activity.

Read more in YFile.

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Lake ice becoming increasingly unsafe at start and end of winter, raising risk of drowning /science/2024/12/12/lake-ice-becoming-increasingly-unsafe-at-start-and-end-of-winter-raising-risk-of-drowning/ Thu, 12 Dec 2024 15:51:52 +0000 /science/?p=36458 Media release from December 11, 2024 91亚色 researchers say warmer temperatures will create more unsafe white ice conditions, ice that鈥檚 more like a snow cone than ice cube. Sports and recreational activities on frozen lakes across the Northern Hemisphere are a popular pastime for millions, but according to new research out of 91亚色, […]

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Media release from December 11, 2024

91亚色 researchers say warmer temperatures will create more unsafe white ice conditions, ice that鈥檚 more like a snow cone than ice cube.

Sports and recreational activities on frozen lakes across the Northern Hemisphere are a popular pastime for millions, but according to new research out of 91亚色, the safety of that ice is becoming more precarious and shorter in duration.

As winter and early spring temperatures continue to rise with a warming world the quality of lake ice is changing and that prompted the researchers to delve into available data to project how many fewer days of safe ice there could be in the future. That number could be upwards of 29 days depending on the condition of ice cover and whether the world reaches 1 C, 2 C or even 4 C of warming.

Sapna Sharma
Sapna Sharma, 91亚色 Research Chair in Global Change Biology in 91亚色鈥檚 Faculty of Science

Although their previous work looked at ice thickness and duration, important indicators of ice safety, they are quick to point out that that is only part of the equation. Equally important and potentially as dangerous is the quality of the ice, which also helps determine whether it is safe, especially early and late in the season when the ice is either forming or melting.

鈥淨uality and thickness need to be weighed together when deciding if the ice is safe to go out on. Our research found there will be fewer safe ice days and the formation of safe ice during the transition period in early winter will take longer, creating a higher risk for accidents and drownings,鈥 says Professor Sapna Sharma of 91亚色鈥檚 Faculty of Science and senior author of the paper.

Led by 91亚色 Postdoctoral Fellow Joshua Culpepper, the study tracked historical shifts in ice thickness and quality to determine how global temperature rises will affect the number of safe days on the ice.

鈥溾淲e used a lake ice model to examine changes in ice thickness of the Northern Hemisphere between 1850 and 2100,鈥 says Culpepper. 鈥淲e show that although many lakes are still forecasted to freeze, as warmer temperatures become the norm, they will be unsafe to use for a longer time especially if more white ice, than black ice forms.鈥

A block of white lake ice
A block of white lake ice. By Joshua Culpepper

The quality of ice, how strong it is and how much weight it can hold, differs depending on whether it鈥檚 predominantly white or black ice.

鈥淲hite ice conditions increase the risk of falling through the ice as white ice has a lower load bearing capacity compared to black ice at the same thickness,鈥 says Culpepper, who cautions that as the climate heats, white ice conditions are expected to increase.

Shoulder seasons is when it is most unsafe

Lake ice formation in the Northern Hemisphere could be delayed anywhere from Nov. 15 to Jan. 18, dictated by how high average temperatures climb 鈥 1 C, 2 C or 4 C 鈥 and it is during this transition that white ice is most likely to form.

鈥淲e found lake ice will likely be unsafe longer at the beginning, than the end, of the ice season. Although the lakes will be frozen, they could be unsafe to use for three to four weeks at the beginning of winter and for an extra week at the end when ice is predicted to decay rapidly,鈥 says Sharma.

鈥淭his rapid break up of safe ice conditions suggests that the end of the ice season will offer some of the most dangerous conditions, but the beginning of the season is also highly risky. The greatest number of drownings through ice occur at the beginning and end of the ice season and this risk is expected to be higher with climate change.鈥

How does white ice differ from black ice?

Even though the ice might measure the right thickness to venture out for a skate or snowmobile ride, if it is comprised mainly of white ice, it likely won鈥檛 hold. This has already resulted in dozens of drownings, say the researchers.

White ice is more likely to form when temperatures are warmer than usual or there are warm rainy days following very cold days. It is usually opaque, like snow, and filled with more air bubbles, smaller ice crystals, and holds less weight than black ice. At temperatures close to 0 C, it could be more than 50 per cent weaker. Steady cold temperatures are needed for black ice formation, which is clear and dense, has few air pockets and larger ice crystals, making it able to hold heavier loads.

Ice block of black ice
Ice block of black ice. By Joshua Culpepper

Guidelines on ice thickness for people, snowmobiles, cars and transport trucks on the ice are based on black ice. If people are measuring the ice thickness without accounting for the type of ice, that could lead to life-threatening plunges through the ice.

Lake ice is unsafe when it thins to less than 10 cm of black ice, less than 15 cm of equal parts black and white ice, or less than 20 cm of white ice. The formation of white ice is expected to increase as temperatures climb increasing the unsafe transition period.

In Canada last December, six people, including a couple of teens in Ontario, died within a week plunging through thin ice. Two more died in Ontario this February. In Finland, four people died from falling through weak ice in January and February alone, where the average is said to be 18 people annually. In Sweden, 16 people drowned from falling through the ice in 2014 and at least nine in 2021, for example.

The researchers hope to get the word out on the increasing precariousness of lake ice today and into the future, and hope people will take precautions before venturing onto the ice, even if it looks solid enough.

The paper, , was published today in the journal PLOS ONE.

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91亚色 U student鈥檚 bat research supports conservation in Belize /science/2024/10/25/york-u-students-bat-research-supports-conservation-in-belize/ Fri, 25 Oct 2024 15:13:33 +0000 /science/?p=35400 91亚色 biology PhD student Gliselle Marin is leading conservation efforts in Belize by studying the way the country鈥檚 bats contribute to biodiversity, while trying to remove the larger stigmas associated with the nocturnal animals. Marin鈥檚 commitment to bats was inked two years ago when she put aside a lifelong fear of needles and had three of […]

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91亚色 biology PhD student Gliselle Marin is leading conservation efforts in Belize by studying the way the country鈥檚 bats contribute to biodiversity, while trying to remove the larger stigmas associated with the nocturnal animals.

Marin鈥檚 commitment to bats was inked two years ago when she put aside a lifelong fear of needles and had three of the flying mammals tattooed on the nape of her neck.

Today, the international student is leveraging all that she is learning about bats to help lead local conservation efforts in Belize, the richly biodiverse country where she was born.

Gliselle Marin
Gliselle Marin

鈥淚 see a future where the people who live amongst the biodiversity here have agency over the resources around them,鈥 said Marin, whose research takes her to the forests of Belize three times a year for weeks at a time.

She has just wrapped up a five-night bat survey in the Lamanai Archaeological Reserve, which is built around the ruins of a pre-classic Mayan city. This kind of field research involves capturing bats in nets and harp traps, which can catch flying bats more easily without damaging their wings.

She is logging the species she finds and also studying their diets. By extracting DNA from their dung, she hopes to understand whether bats are diversifying what they consume because they like the variety, or because they aren鈥檛 getting the nectar, fruit or insects they need from their environment.

Through her field work in Belize, she found that a species of bat believed to limit its food intake to nectar was also eating insects. This particular bat had evolved to have an elongated nose like a hummingbird and a hairy, retractable tongue to help it take in the nectar. Yet, it was eating insects.

鈥淭hat鈥檚 what my research is based off,鈥 said Marin. 鈥淚鈥檓 looking at what different guilds of bats are supposed to be eating and investigating further to see if there are more anomalies in what they are actually eating.鈥

Gliselle Marin with bat
Gliselle Marin with one of the bats she has studied in Belize.

What her research finds could lead to improved bat conservation and efforts to conserve the country鈥檚 forests, which are under threat from agricultural expansion, as well as climate and natural disasters like hurricanes. Healthy bats mean healthy forests.

The role birds play in the ecosystem is better understood; yet, at night, when bats are active, they take over many of the same jobs, including dispersing seeds that will grow first in degraded areas and build back forests.

鈥淭he birds perform all these ecosystem roles during the daytime. And bats are kind of their counterparts at night,鈥 she said.

Marin is part of a small movement trying to educate communities, both locally and further afield, about that connection.

She works closely with her supervisor, Elizabeth Clare, an assistant professor of biology at 91亚色 who runs the Clare Lab devoted to biodiversity, and goes by @Dr_bat_girl on social media.

They both share a desire to raise awareness about the contributions of bats to the ecosystem through her work, and also to destigmatize them.

鈥淭hey go under the radar a lot because they鈥檙e still stigmatized. When you hear of bats, you think rabies or that they fly into your hair,鈥 she said.

鈥淭here鈥檚 a lot that people just don鈥檛 know. The more I learn about bats, the more I realize how amazing they are.鈥

Courtesy of YFile

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Markham Campus prioritizing experiential education with unique biotechnology programs /science/2024/10/22/markham-campus-prioritizing-experiential-education-with-unique-biotechnology-programs/ Tue, 22 Oct 2024 18:57:18 +0000 /science/?p=35333 With 91亚色鈥檚 new Markham Campus now open, the campus is prioritizing opportunities that demonstrate 91亚色鈥檚 leadership experiential education (EE), which is increasingly a focus in Canada鈥檚 halls of higher learning. It is doing so with innovative new programs, including two rooted in biotechnology. 鈥淭he vision for the Markham Campus from the onset was to […]

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With 91亚色鈥檚 new Markham Campus now open, the campus is prioritizing opportunities that demonstrate 91亚色鈥檚 leadership experiential education (EE), which is increasingly a focus in Canada鈥檚 halls of higher learning. It is doing so with innovative new programs, including two rooted in biotechnology.

Dan Palermo
Dan Palermo

鈥淭he vision for the Markham Campus from the onset was to provide our students with access to high-level experiential education opportunities,鈥 said Dan Palermo, interim deputy provost, Markham. 鈥淭his vision aligns with the broader vision of 91亚色 to expand experiential education opportunities for students across the institution.

鈥淭his is also in response to what students want as part of their academic journey, even what parents want for their children as they go to post-secondary school. And it does prepare students better for the workforce,鈥 Palermo said.

The Markham Campus offers degree programs and micro-credentials focused on EE, digital technologies and entrepreneurship. Among the courses benefiting from the campus鈥檚 focus on EE are the brand-new Communication, Social Media & Public Relations course, the Digital Technologies course and the Computer Science for Software Development course, which will all include work terms in Markham-based industries or non-profits.

The Markham Campus鈥檚 new Master of Biotechnology Management (MBM) program and Graduate Diploma in Biotechnology will also advance the University鈥檚 EE leadership, closely aligning classroom education with what the industry has said workers need.

In the case of the biotechnology programs, the course experiences were 鈥 in fact 鈥 specifically designed that way.

Jade Atalah
Jade Atallah

Jade Atallah, graduate program director of biotechnology at Markham and an assistant professor in the teaching stream in the Department of Biology; and Luz Puentes J谩come, an assistant professor in the teaching stream in the Department of Biology, developed the curricula and pedagogical approaches of the biotechnology programs after listening to the industry. 

鈥淧edagogically, we knew that experiential education must be at the centre of curricular delivery,鈥 Atallah said. 鈥淏ecause we were working with new programs, it was a relief that no retrofitting was needed. We were able to start from the ground up, where experiential education was at the centre and everything else came around it.鈥

Indeed, the graduate biotechnology programs incorporate immersive and multimodal experiential learning such as industry workshops, industry fireside chats, participation in biotechnology conferences, industry challenge questions, interdisciplinary capstone projects and industry internships.

鈥淲e bring in industry partners to act as industry mentors, and our graduate program students work in groups as consultants and try to solve a problem posed by the industry mentor,鈥 said Puentes J谩come.

鈥淚n that way, they鈥檙e working directly in an industry context. They go through the process of figuring out a solution for this program, doing some literature search and writing a white paper. Then they鈥檒l have a final presentation in which we will bring all the industry mentors together to observe the presentations and to network with our students.鈥

The programs are interdisciplinary. In the case of the MBM program, students integrate management training with the biotechnology portion of the course. 鈥淭his would prepare the students to, perhaps, run a biotech startup,鈥 Puentes J谩come said. For example, she said, 鈥渢hey might work toward creating a water bottle with biology, not fossil fuels.鈥

Marisol John is a student in the Master of Biotechnology Management program and is among those who have seen the many possibilities for a biotech career available to them through the program.

 鈥淚 have learnt so much about this industry, and I鈥檓 excited to continue this process of directly engaging with real-world industry problems,鈥 she said.

John is already envisioning ways she can apply her in-class experiences.

鈥淚 have a very deep passion for agri-bio and environmental biology,鈥 John said. 鈥淐oming from a Caribbean island, Dominica 鈥 the greenest island in the Caribbean 鈥 I think this program will afford me a diverse skill set to effect positive and sustainable change in my country.鈥

Her undergrad thesis was based on the therapeutic applications of ginger, something John hopes to expand upon. Her grandparents treated flu and upset stomachs with ginger tea, and John鈥檚 research showed it鈥檚 used for many therapeutic reasons, including pneumonia, tuberculosis and asthma. But, she said, there is limited information available on these topics.

鈥淚 am using this to drive the rest of my career,鈥 said John. 鈥淚 am learning how various biotech industries can be integrated to bridge the knowledge gap and innovatively solve problems related to crops, agricultural sustainability, food processing and diversification. The possibilities are endless.鈥

Thanks to the experiential education opportunities provided by the new Markham Campus 鈥 like those in biotechnology 鈥 the possibilities will be endless for other students, too.

With files from Julie Carl

Courtesy of YFile

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Lake ice quality degrading as planet warms /science/2024/09/19/lake-ice-quality-degrading-as-planet-warms/ Thu, 19 Sep 2024 17:39:15 +0000 /science/?p=34945 Media release from September 19, 2024 Several studies have looked at lake ice quantity and its duration, but there is little research on the quality of the ice which directly corresponds to how safe it is to venture out on. Ice may look safe for a game of pick-up hockey on the lake, but as […]

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Media release from September 19, 2024

Several studies have looked at lake ice quantity and its duration, but there is little research on the quality of the ice which directly corresponds to how safe it is to venture out on.

Ice may look safe for a game of pick-up hockey on the lake, but as a new study out of 91亚色 found, looks can be deceiving. Warming winters are not only affecting ice thickness and timing 鈥 when a lake freezes and thaws 鈥 but also quality, making it potentially unstable and unsafe.

When lakes and rivers freeze, there are two predominant layers of ice, what鈥檚 called white ice and black ice. White ice is generally opaque, like snow, and filled with more air bubbles and smaller ice crystals, diminishing its strength and stability, while black ice is clear and dense with few air pockets and larger ice crystals making it a lot stronger.

鈥淚ce quality is important because of its direct implications for load bearing capacity for human safety and also how much light will transmit under ice for life under frozen lakes,鈥 says 91亚色 Professor Sapna Sharma.

Researchers measure ice thickness in lake ice. Photo by is Aman Basu, a PhD student in Sapna Sharma鈥檚 lab

The problem, says lead author and 91亚色 Postdoctoral Fellow Joshua Culpepper, is that the unpredictable and warmer winter weather is creating thinner layers of black ice and sometimes a corresponding thicker layer of white ice, the unstable kind. The two combined can make for treacherous conditions for skaters, hockey players, snowmobilers, ice anglers and ice truckers.

鈥淲e know that in general, lake ice is forming later in the season and breaking up earlier, which implies an overall shorter duration of ice cover, but our study looked at what the ice is doing. How is it changing? You might get periods of time when people are on the ice and they think it鈥檚 safe, but it really isn鈥檛. It鈥檚 not sufficiently thick enough given the changes in the quality,鈥 says Culpepper.

10 cm no longer the golden rule

Thickness alone is no longer a good predictor of safe ice. If there is too much white ice and not enough black ice, the ice it may not be strong enough to hold a person鈥檚 weight. It鈥檚 what the researchers are calling a dangerous combination.

鈥淔or a human to go out on the ice to skate or play, that requires about 10 centimeters or four inches of black ice鈥ut what we鈥檙e seeing and what we鈥檙e predicting is that climate change is contributing to more white ice conditions,鈥 says Sharma, who recommends people measure the ice and if there is only a thin layer of black ice to double the usual recommended thickness to at least 20 cm.

鈥淏lack ice is clear and there鈥檚 no slush. You shouldn鈥檛 be walking over slush,鈥 says Sharma, she adds that it鈥檚 always best to go with someone or a group.

On thin ice

The lack of consideration for quality ice is already leading to a loss of life. In Canada last December, six people, including a couple of teens in Ontario, died within a week plunging through thin ice. Two more died in Ontario this February. In Finland, four people died from falling through weak ice in January and February alone, where the average is said to be 18 people annually. In Sweden, 16 people drowned from falling through the ice in 2014 and at least nine in 2021, for example.

The findings from a 2020 study led by Sharma found widespread drowning across the Northern Hemisphere, but surprisingly, northern Canada, the territories, had the highest drownings per capita even though it was the coldest.

鈥淭hat is because of the dramatic changes in the Arctic which is warming four times faster than the rest of the globe so it鈥檚 not just southern regions that are experiencing these changes in ice conditions, but also far north. What you would consider to be like extremely cold icy areas,鈥 says Sharma.

91亚色 Postdoctoral Fellow Joshua Culpepper measures a chunk of ice on Lake Simcoe. Photo by former 91亚色 Postdoc Kirill Shchapov of Sapna Sharma鈥檚 lab

鈥淔or a transport truck, they require 100 cm or about 42 inches of black ice. So those benchmarks on transportation are no longer viable because there is more white ice, which is approximately less than half the strength of black ice. What we鈥檙e predicting is a 95 to a 99 per cent loss in winter ice road transportation infrastructure without meaningful adaptations for ice safety.鈥

That could mean remote communities are at risk of not being cut off and unable to access food, supplies, medicine and the like, during the winter.

Unseasonable winter weather

For this study, Culpepper and some of his co-authors had to stop taking ice measurements in mid-February on Lake Simcoe and early March on Paint Lake in the Muskoka region because the ice cover was dangerously thin.

Changes in precipitation from unseasonably warm weather is creating a lot of the unsafe ice conditions and unpredictability. Warmer temperatures, rain and even snow can alter the strength and thickness of lake ice.

Sharma and Culpepper recommend checking the weather reports for the last month.

鈥淟ake ice has a memory,鈥 says Sharma. 鈥淎ll of the weather fluctuations are stored in the ice. If the temperature was over 0 C for a period of time, if there was rain or if there were extremely sunny conditions, all of that can affect the safety of the ice for human use. When there are freeze thaw events or temperatures are above 0 C, the ice becomes weaker, and it becomes structurally less stable.鈥

Underneath the ice

An example of clear black ice. By Postdoctoral Fellow Joshua Culpepper

The diminishing quality of ice is also affecting life below, the amount of nutrients available for fish and other aquatic life, such as invertebrates, as well as phytoplankton which needs light for photosynthesis, but with more white ice, it鈥檚 blocking some of that light and compromising the health of the ecosystem.

But as Culpepper says, their study is one of only a few that looks at the quality of lake ice and yet that ice is changing dramatically. 鈥淭he thing that stuck out to me first is the surprising lack of data that we have on ice quality broadly,鈥 he says. 鈥淲e were diving into what data was available, but trying to find exactly what we could work with in terms of data that鈥檚 available in the Northern Hemisphere was pretty challenging.鈥

What鈥檚 needed, he says, is regular measurements of ice quality, including black and white ice thickness, throughout the Northern Hemisphere.

The paper, , was published today in the journal Nature Reviews Earth and Environment.

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Researchers receive new CFI funding for cutting-edge projects /science/2024/09/16/researchers-receive-new-cfi-funding-for-cutting-edge-projects/ Mon, 16 Sep 2024 17:42:16 +0000 /science/?p=34885 Congratulations to Faculty of Science researchers Bill Kim and Logan Donaldson for receiving new infrastructure funding from the Canada Foundation for Innovation (CFI) John R. Evans Leaders Fund (JELF), which supports institutions in attracting top talent and acquiring the state-of-the-art tools and equipment necessary to enable their innovative work. Chemistry Professor Kim received $100,000 for […]

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Congratulations to Faculty of Science researchers Bill Kim and Logan Donaldson for receiving new infrastructure funding from the Canada Foundation for Innovation (CFI) John R. Evans Leaders Fund (JELF), which supports institutions in attracting top talent and acquiring the state-of-the-art tools and equipment necessary to enable their innovative work.

Bill Kim

Chemistry Professor Kim received $100,000 for the project 鈥淢ethods to Create Mutations in Cells to Understand and Treat Disease.鈥 Kim鈥檚 project will involve the creation of new technologies and special tools for protein engineering and genome editing, enabling him and his lab to alter the genetic code of cells. This type of innovation will advance Kim鈥檚 study of the genetic differences of various diseases, including cancer, diabetes and heart disease, in the hope it can also be used to help find better treatments. In addition, the researchers believe this new technology holds the potential to grow more climate-resilient plants and could be adopted by Canadian pharmaceutical companies and agriculture businesses for future applications.

Logan Donaldson

Biology Professor Logan Donaldson received $155,000 for the project 鈥淎n Advanced Platform for Biomolecular NMR Spectroscopy.鈥 The funding will support an upgrade of the electronics to the high-field 700 MHz nuclear magnetic resonance spectrometer in the Life Sciences Building. The Avance-Neo platform upgrade will provide a new opportunity for Donaldson and 12 other researchers affiliated with the 91亚色 U YSciCore facility to obtain the most sensitive and detailed information of biomolecules linked to neurodegenerative disease, biosensor design, antibiotic resistance and vaccine development. The funding also provides support for an intensive computing platform that will enable AI design of new biomolecules with therapeutic and diagnostic potentials.

Courtesy of YFile.

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From 91亚色 to Yale: Faculty of Science professor named Fulbright winner /science/2024/09/11/from-york-to-yale-faculty-of-science-professor-named-fulbright-winner/ Wed, 11 Sep 2024 19:30:27 +0000 /science/?p=34781 Courtesy of News@91亚色 A long-time 91亚色 professor will join the Ivy League this fall, having been awarded a prestigious visiting professorship at Yale University. Dawn Bazely, a University Professor in the Department of Biology, Faculty of Science, has been named this year鈥檚 recipient of the 2024-25 Fulbright Canada Distinguished Visiting Professorship, the foundation鈥檚 top […]

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Courtesy of News@91亚色

A long-time 91亚色 professor will join the Ivy League this fall, having been awarded a prestigious visiting professorship at Yale University.

, a University Professor in the Department of Biology, Faculty of Science, has been named this year鈥檚 recipient of the 2024-25 Fulbright Canada Distinguished Visiting Professorship, the foundation鈥檚 top Research Chair.

Bazely has taught at 91亚色 for more than 30 years and met the news of the win with shock and disbelief.

Dawn Bazely

鈥淚 initially thought it was fake or their email account was hacked,鈥 says the trained ecologist. 鈥淏ut once it was verified, I chalked it up to a career built on 99 per cent grind and persistence, and a decades-long personal policy of never resting on my laurels. I feel that this is evidence that I still have something to bring to the academic table.鈥

At Yale, Bazely will teach a course as wide-ranging as her expertise, called Canada鈥檚 Approach to Selected Global Wicked Problems. The course will cover world issues, including climate change, settler-colonialism, and public health 鈥 as seen through a Canadian lens.

The largely anticipated American group of students will also learn about Canadian politics, the country鈥檚 relationship to the United Nations and its contributions to several intergovernmental panels, like the Intergovernmental Panel on Biodiversity and Ecosystem Services (IPBES), along with current topics particularly relevant north of the border, including the Truth and Reconciliation Commission鈥檚 Calls to Action and the Canadian mining sector.

For Bazely, the opportunity to conduct research and teach at Yale is a platform to amplify as many voices and perspectives as possible.

鈥淚 will be bringing in guest presenters, including far more brilliant people than me from 91亚色 and elsewhere, to the course each week, to share their views of the Canadian zeitgeist and how science and society are connected,鈥 she says. 鈥淚 want to grow the students鈥 global awareness, expose them to new ideas and have the course be as expansive and as eye-opening of an experience as possible. Not to mention, the most important part: I want the course to be fun.鈥

Bazely鈥檚 upcoming stint at Yale also won鈥檛 be the first time she鈥檚 taught at an Ivy League institution. In 2011, she was a Charles Bullard Fellow in Forest Research at Harvard University.

These awards add to a long list of accolades that Bazely鈥檚 received over the years, becoming one of 91亚色鈥檚 most decorated academics. She received the Sandford Fleming Medal in Excellence in Science Communication from the Royal Canadian Institute for Science in 2022, as well as the Minister of Colleges and Universities Award of Excellence for Future-proofing Ontario鈥檚 students.


91亚色 students should hold their heads up high about their education and training. They can hold their own and compete with the best of the best students from schools around the world.


Bazely first came to 91亚色 in 1990 after earning her doctorate from Oxford University. As a first-generation university student herself, she was drawn to 91亚色 because of its diverse student body, which includes many generational pioneers.

鈥91亚色 students should hold their heads up high about their education and training,鈥 she says. 鈥淭hey can hold their own and compete with the best of the best students from schools around the world.鈥

As a 91亚色 Fulbright scholar, Bazely will follow in the footsteps of 91亚色 faculty member Kent McNeil, an emeritus distinguished research professor at Osgoode Hall Law School, who won the award in 2020, and 91亚色 PhD alumnus Andrew Knight, a professor of international relations at the University of Alberta, who won in 2021.

The Fulbright Canada Distinguished Visiting Professorship is from September to April and is valued at $50,000 USD. For more about Fulbright Canada, visit .

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91亚色 professor hosts recipient of prestigious Marie-Curie Postdoctoral Global Fellowship /science/2024/08/19/york-professor-hosts-recipient-of-prestigious-marie-curie-postdoctoral-global-fellowship-2/ Mon, 19 Aug 2024 15:58:20 +0000 /science/?p=34506 91亚色 Biology Professor Kohitij Kar, in the Faculty of Science, will host the recipient of a prestigious Marie Sk艂odowska-Curie Actions (MSCA) Postdoctoral Global Fellowship in his lab for two years starting this November to advance cutting-edge work in artificial intelligence and visual tracking. The recipient, Matteo Dunnhofer from the University of Udine in Italy, […]

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91亚色 Biology Professor Kohitij Kar, in the Faculty of Science, will host the recipient of a prestigious (MSCA) Postdoctoral Global Fellowship in his lab for two years starting this November to advance cutting-edge work in artificial intelligence and visual tracking.

The recipient, from the University of Udine in Italy, received a fellowship valued at C$340,000 from MSCA, which empowers researchers wishing to carry out their work abroad.

Dunnhofer is an award-winning researcher at the Machine Learning & Perception Lab in the Department of Mathematics, Computer Science, & Physics of the University of Udine.

His fellowship project, titled 鈥淭owards primate-like artificial neural networks for visual object tracking,鈥 will focus on studying algorithms at the intersection of artificial intelligence and neuroscience in the field of visual object tracking. Visual object tracking is the use of algorithms in continuously recognizing objects, such as people and vehicles, and has applications in fields like autonomous driving, robotics and medicine.

Kohitij Kar
Kohitij Kar

The project will draw on Kar鈥檚 expertise as a Canada Research Chair in Visual Neuroscience and his experience leading the Visual Intelligence & Technological Advances Laboratory, which is a core part of the Vision: Science to Technology Application Program, the Centre for Integrative & Applied Neuroscience, and the Centre for Vision Research at 91亚色. His research lies at the intersection of neurophysiological investigations of visual intelligence in non-human primates and artificial intelligence systems. He is using his findings to develop artificial intelligence systems that mimic the primate brain in hopes of developing treatment strategies for neurological disorders.

As typically encouraged by the Marie Curie fellowships, Dunnhofer will augment his expertise in computer vision with Kar鈥檚 lab鈥檚 expertise in studying computations within biological vision systems like non-human primates.

For more information about the fellowship program, visit the .

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