Faculty of Science

Saint Mary’s students research Sable Island horse skulls

Sable Island is a place of mystery and history, a remote island in the North Atlantic fabled for its sand dunes and shipwrecks, and almost impossible for the average person to access. But for naturalists and biologists, there is much to learn, especially from studying the wild horses who thrive there.  

On a November evening, dozens of Haligonians gathered in the McNally Theatre Auditorium to hear the latest Sable Island research and get up close to the skulls of these unique horses collected over 30 years by Zoe Lucas, President of the Sable Island Institute.  Katharyn Chadwick and Richard Orton, doctoral students at Saint Mary’s University, collaborated on the project with the Sable Island Institute, Nova Scotia Museum of Natural History and was possible due to funding from SMU Works. The project involved 716 skulls and more than 13,000 measurements and over 6000 photographs. Members of the public were invited to ​view​ the skulls on display, ask questions​,​ and even carefully touch the specimens. ​Two​ skull​s​ stood out​, one​ for ​a​​ ​large growth protruding from the upper jaw and ​the other for an ​odd deterioration​ and pitting of the​ lower jaw.  The researchers want to know if anyone can suggest what caused th​ese​ malformation​s; suggestions include a bone abscess or tumour, and a root canal abscess​.  

More importantly, why study this group of horses and their skulls for clues about their development,​ variation in skull morphology and age?​ Richard and Katharyn explain that ​​since the horses first arrived on Sable Island there have been numerous introductions of other horse breeds, to improve breeding stock, provide additional labour and produce foals for resale back on the mainland. This has likely led to a complex mixing of the population, with genetic work revealing traces of Morgan, Clydesdale, and Thoroughbred.​ Sable Island horses have been isolated for at least 50 years and it is common that island populations exhibit unique traits.

“However, we do not always understand the biological mechanisms underpinning such unique adaptations,” says Katharyn Chadwick. “ Therefore, a deeper understanding of the ​skull ​morphology might further our understanding of the evolution of the Sable Island horses​ and highlight any unusual morphologies unique to this population​​.”

One of the main aims of the project was to catalogue this unique collection, photographing each skull, estimating age, and noting gender unusual features, post-mortem/storage damage and injuries. Finally, thousands of bagged teeth were paired with the correct skulls.​​     ​​ 

​​​From the teeth, several well-described aging metrics commonly used in equine studies were recorded for each horse. Using data collected by Zoe Lucas on known age horses, the researchers hope to confirm the suitable use of these metrics for the Sable Island horses.​​     ​​ 

“Kate and Richard’s study of the horse skulls is an important contribution to the Sable Island Institute’s long-term research program. There is still much to be learned from the collection, and now we have a detailed inventory and preliminary data that will assist in planning follow-up work,” says Zoe Lucas. “This unique and extensive reference collection will enable the Institute to study variations within the Sable population. It will also provide a basis for comparisons with other groups and breeds of horses, as well as with Sable Island horses living on the Island decades from now. This project has been a very productive and encouraging collaboration, and the Sable Island Institute looks forward to further work with Saint Mary’s University and the Nova Scotia Museum.”

Both PhD candidates have travelled from other countries to pursue their studies at the Frasier Lab at Saint Mary’s University. In addition to their research project on the Sable Island horses, they will be addressing conservation concerns of the North Atlantic Right Whale using different genetic approaches. Specifically, Katharyn Chadwick’s thesis is centered on understanding how ship strikes and non-lethal entanglements lead to ​changes in ​gene​     ​​ expression​​     ​​ via epigenetic​ modifications, while Richard Orton is assessing the impact of genetic mutation on reproductive success in North Atlantic Right Whales. 

Celebrating excellence: Saint Mary’s faculty recognized for external research funding

Researchers at Saint Mary’s University continue to be recognized for their important work in their fields, securing over $11 million dollars in external funding in the form of research contracts, Canada Research Chair positions and tri-council grants, over the last 12 months.

A celebration to honour 90 researchers from faculties of Science, Arts, and the Sobey School of Business took place in the McNally Theatre Auditorium on November 10th. A few examples of how their research contributions will impact our communities include investigating healthcare resource planning for older adults, exploring how to retain international students in Atlantic Canada, and enhancing Canadian vaccination strategies using machine learning and business analytics.

Special recognition was given to Dr. Gavin Fridell, Tier 2 Canada Research Chair (CRC) in International Development Studies (2012 to 2022) and Dr. Kevin Kelloway, Tier 1 CRC in Occupational Health Psychology (2008 to 2022) for completing their CRC terms during their academic careers at Saint Mary’s University.

Our ecosystems will benefit from Saint Mary’s researchers that are implementing small-scale fisheries guidelines, conducting salt marsh restoration and community-based watershed monitoring. Other research is determining the future impacts of freezing and storing sperm to assist the endangered Inner Bay of Fundy Salmon population.

The quality of research happening here at Saint Mary’s University is something that we should all be proud of, congratulations again to the CRCs who recently completed their terms, and all of those that have been recognized.

 

Researching microbial-terroir and its impacts on wine flavour 

A collaboration between Dr. Clarissa Sit’s chemistry lab and L’Acadie Vineyards is marrying Nova Scotia’s history of winemaking with modern chemistry. The research is exploring the effects micro-organisms have on the flavours of grapes in Nova Scotia’s vineyards. L’Acadie Vineyards owner Bruce Ewert was excited to partner with Dr. Sit to determine what unique fungi and bacteria contribute to the flavour profiles of wines produced at his award-winning, Annapolis Valley vineyard.  

Bottles of natural wine from L'Acadie Vineyard

“This project came about because of one of the students in my research lab,” says Sit. “After attending a research seminar, we started looking at the micro-organisms in the soil and on the surface of grapes in Nova Scotia vineyards.”   

Sit’s research presented an opportunity for L’Acadie Vineyards. The first certified organic vineyard in the province and the first biocyclic vegan winery in North America, the family-owned business specializes in an array of organic natural wines. 

While conventional wines are frequently treated with sulfites to kill microbes, natural wines rely on native yeast from the fermentation process to do so. Microbes in the soil are splashed onto the grapes during irrigation and rain events. 

“The mixture of micro-organisms on the surface of the grapes adds flavour to the wine,” says Sit. “That’s what we’re curious about, and vineyard owners are equally curious. We want to see if there are differences in the year-to-year vintages depending on how microbes affect their flavour profiles.”  

Three people tasting and analyzing wine

"Dr. Sit has been so supportive and encouraging. I never thought I would study wine yeasts and the complexities of natural winemaking. I love telling people I am getting a PhD in wine," says graduate student Lauren Grant, pictured above (far right).

In her research, Sit has compared soil samples from L’Acadie Vineyards with those from conventional vineyards to determine the difference between micro-organisms in the soil. These samples were brought back to the lab to isolate some of the strains for in-lab fermentation. 

“We’re adding some of those strains into sterile grape juice to see what chemical profiles they’re producing. We can analyze the strains we’ve been able to isolate to see what flavours each of the microbes are producing and create interesting new combinations.” 

While research is expected to continue for another three years, the project has the potential to grow depending on its findings, says Sit. 

“The focus will now be on the profiling and figuring out what aromatic compounds these microbes are producing and how vineyards can use them to create flavour while benefitting the environment.”

Related stories:

Helping the North Atlantic Right Whale rebound

Dr. Frasier speaking to students

At nearly 70 tonnes, the subjects of Dr. Timothy Frasier's research are massive examples of how quickly a species can progress to the brink of extinction. North Atlantic right whales are one of the most endangered large whales globally, with fewer than 400 in existence. While protection initiatives are in place, Dr. Frasier is concerned with the whale's low reproduction rate.   

Using genomic data, Dr. Frasier works to better understand what genetic factors limit the species' recovery. Early hypotheses suggest that low genetic variation and inbreeding could be possible factors. By determining the factors that limit reproductive success, conservation efforts can be more effective and efficient in saving the species from extinction.

Picture of a right whale

Photo credit: New England Aquarium IUCN/PA

"By working with colleagues and governments in Canada and the United States, we can move fairly quickly from research results to impacts on policy and procedures," says Dr. Timothy Frasier of the Faculty of Science. "Right whales are in a very precarious situation, and we need to identify how conservation actions can be changed to improve the chances for the species to recover." 

With $6 million in new funding, Dr. Frasier and his colleagues from Genome Atlantic and the New England Aquarium can continue their research into what factors limit the reproductive success of right whales. This work will help focus conservation efforts to save these beautiful mammals.

Did you know? Each year, our Faculty of Science and the Canadian Whale Institute host a 10-day Marine Mammal Summer Camp, where teens conduct hands-on marine research in the laboratory and off the coast of New Brunswick (pictured above). 

Related stories:

Saint Mary’s contribution to the James Webb Telescope

“The Sparkler” galaxy—seen here in JWST’s first deep image—was found by Saint Mary’s astronomers and colleagues and hosts some of the universe’s first stars. Credit: NASA

The James Webb Space Telescope (JWST), the most powerful space telescope ever built, has a Saint Mary’s connection. Dr. Marcin Sawicki, Canada Research Chair in Astronomy, is part of the team that developed a key part of the telescope, namely the Near Infrared Imager and Slitless Spectrograph (NIRISS), which records data at near-infrared wavelengths invisible to the human eye. 

“Stars, galaxies and objects all have an infrared pattern, similar to a barcode” says Dr. Sawicki. “With the NIRISS, we can read the object’s bar code and figure out all sorts of properties like how old it is, how far away it is and whether it’s a galaxy or other space object.” 

Dr. Sawicki and his students have unprecedented access to the Webb telescope. “Our postdocs and students will be using JWST to observe the birth of the first galaxies soon after the Big Bang.” he says. “The potential for extremely impactful science is enormous. We’re eager to use Webb for world-leading research here in Nova Scotia.”

Did you know? “The Sparkler” galaxy—seen in JWST’s first deep image—was found by Saint Mary’s astronomers and colleagues and hosts some of the universe’s first stars. 

Related stories:

50 years of research, education and outreach

A quick 22-storey elevator ride is all it takes to be transported from the heart of a bustling campus into another galaxy at the Burke-Gaffney Observatory. Currently celebrating 50 years in operation, the observatory recently welcomed a new management team in Dr. Vincent Hénault-Brunet and Tiffany Fields BSc’17 MSc’19. Operating one of two professional-grade telescopes in Atlantic Canada, this duo is steadfast in fulfilling their mission to provide astronomy and astrophysics education, research and outreach to communities locally and worldwide. 

“We are incredibly lucky to have the Burke-Gaffney Observatory here on campus,” says Fields. “It allows students to participate in science outreach and it also allows our community to experience the universe here at Saint Mary’s.”  

Fields has always felt the gravitational pull of the observatory. During her time as a student at Saint Mary’s, she worked at the observatory before becoming its technician. Similar to her own experience, she wants to give students the opportunity to learn how to use the state-of-the-art observational astronomy equipment with the hopes of preparing them for careers in astronomy and data science. Dr. Hénault-Brunet agrees.

"For generations, Nova Scotians have been enlightened by the universe after a visit to the Burke-Gaffney Observatory," he says. "We also know students come to study astronomy and astrophysics at Saint Mary's because of our observatory." 

Sitting atop the Loyola building for half a century, the Burke-Gaffney Observatory has celebrated many milestones and continues to look to the future. The observatory is the location where the first supernova was discovered and continues to sit high in the sky as a beacon of generosity and the pursuit of a better understanding of our universe. 

Did you know? The Burke-Gaffney Observatory has allowed many to explore the universe thanks to the generosity of our supporters, including Dr. Ralph Medjuck LLD’13, whose philanthropic gift in 2014 helped upgrade the telescope.

Related stories:

Researchers identify what could be clusters that contain the first and oldest stars in the universe

Webb’s First Deep Field. Thousandsof galaxies flood this near-infrared, high-resolution image of galaxy cluster SMACS 0723. Credit: NASA, ESA, CSA, STScI

Researchers at Saint Mary’s University and the University of Toronto have identified what could be clusters that contain the first and oldest stars in the universe.  

The researchers used the James Webb Space Telescope (JWST) to identify the most distant globular clusters ever discovered. These dense groups of millions of stars may be relics that contain the first and oldest stars in the universe. The early analysis of Webb’s First Deep Field image, which depicts some of the universe’s earliest galaxies, is published today in The Astrophysical Journal Letters

In the finely detailed Webb’s First Deep Field image, the researchers zeroed in on what they’ve dubbed “the Sparkler galaxy,” which is nine billion light years away. This galaxy got its name for the compact objects appearing as small yellow-red dots surrounding it, referred to by the researchers as “sparkles.” The team posited that these sparkles could either be young clusters actively forming stars—born three billion years after the Big Bang at the peak of star formation—or old globular clusters. Globular clusters are ancient collections of stars from a galaxy’s infancy and contain clues about its earliest phases of formation and growth.  

From their initial analysis of 12 of these compact objects, the researchers determined that five of them are not only globular clusters but among the oldest ones known. 

“JWST’s made-in-Canada NIRISS instrument was vital in helping us understand how the three images of the Sparkler and its globular clusters are connected,” says co-author Dr. Marcin Sawicki, Canada Research Chair in Astronomy and professor in the Astronomy and Physics Department at Saint Mary’s. “Seeing several of the Sparkler’s globular clusters imaged three times made it clear that they are orbiting around the Sparkler galaxy rather than being simply in front of it by chance.”  

Dr. Marcin Sawicki

Dr. Sawicki worked with a team of researchers from the Canadian NIRISS Unbiased Cluster Survey (CANUCS) team, including colleagues from at the University of Toronto and a group of six postdocs and students at Saint Mary’s.  

“The oldest clusters we found formed when the universe was just a few percent of its current age.  The stars they contain must be almost as old as the universe itself!” says SMU postdoctoral fellow Dr. Vicente Estrada-Carpenter who worked on the NIRISS data as part of the team.  “Our results show the amazing power of Webb when combined with that of gravitational lensing to study the distant universe in unprecedented detail” adds SMU team member Dr. Guillaume Desprez.  “We are excited about the discoveries that will come when Webb observes five more galaxy clusters as part of the CANUCS program.” 

The Milky Way galaxy has about 150 globular clusters, and how and when exactly these dense clumps of stars formed is not well understood. Astronomers know that globular clusters can be extremely old, but it is incredibly challenging to measure their ages. Using very distant globular clusters to age-date the first stars in distant galaxies has not been done before and is only possible with JWST.  

Until now, astronomers could not see the surrounding compact objects of the Sparkler galaxy with the Hubble Space Telescope (HST). This changed with JWST's increased resolution and sensitivity, unveiling the tiny dots surrounding the galaxy for the first time in Webb’s First Deep Field image. The Sparkler galaxy is special because it is magnified by a factor of 100 due to an effect called gravitational lensing — where the SMACS 0723 galaxy cluster in the foreground distorts what is behind it, much like a giant magnifying glass. Moreover, gravitational lensing produces three separate images of the Sparkler, allowing astronomers to study the galaxy in greater detail. 

JWST will observe the CANUCS fields starting in October 2022, leveraging JWST data to examine five massive clusters of galaxies, around which the researchers expect to find more such systems. Future studies will also model the galaxy cluster to understand the lensing effect and execute more robust analyses to explain the star formation histories.  

Collaborating institutions include Canada’s National Research Council, York University and institutions in the United States and Europe. The research was supported by the Canadian Space Agency and the Natural Sciences and Engineering Research Council of Canada.

Saint Mary’s research into sustainable agriculture and more efficient 3D modeling receives federal funding

The Science Building at Saint Mary’s University.

Research into sustainable agriculture and more data-efficient 3D modeling will benefit from newly announced federal funding through the Canada Foundation for Innovation’s (CFI) John R. Evans Leaders Fund (JELF).

Funding for biology researcher Dr. David Chiasson will allow him to explore sustainable agriculture practices in a project titled “Symbiotic nitrogen fixation in legume plants.”  

Dr. David Chiasson

“A central goal of sustainable agricultural practice is to provide nutritious food and plant products while minimizing the impact on the environment,” says Dr. Chiasson. “Legume plants such as beans, alfalfa, and clover are a key component of sustainable agriculture since they do not require nitrogen fertilizer for growth. This unique group of plants forms a symbiotic relationship with soil bacteria called rhizobia. Rhizobia can convert nitrogen gas from the atmosphere into nitrogen fertilizer for the plant in a process termed nitrogen fixation. This association therefore reduces the need for applied nitrogen fertilizers in agriculture.”

The production of synthetic nitrogen fertilizers consumes vast quantities of fossil fuels, and their application leads to negative environmental outcomes such as greenhouse gas emissions and contaminated water resources. Coupled with the rising price of fertilizers, farmers are increasingly turning to legumes as a sustainable means of adding nitrogen to the soil.  

“The long-term goal of this project is to increase the productivity of legume plants,” explains Dr. Chiasson. “This research will provide the knowledge base for strategies aimed to reduce the environmental impact of the agricultural sector while increasing the productivity of our crops. An improved understanding of the nitrogen-fixation symbiosis is both timely and essential as we move towards a future of more environmentally responsible farming practices in Canada.”

Dr. Jiju Poovvancheri, a researcher in the mathematics and computing science department, received funding for a project titled “Research Infrastructure for Large-scale 3D Geometry Acquisition and Modeling.”  

“The CFI fund will be used to set up the lab and purchase research equipment including an AI server, Light Detection and Ranging (LiDAR) scanner and high-performance workstations capable of acquiring and processing large-scale three-dimensional data,” says Dr. Poovvancheri.

Dr. Jiju Poovvancheri

Current practices in city modeling include acquiring raw measurements of the physical world using LiDAR sensors and turning the sensor data into three dimensional meshes. Large-scale meshes created in this manner normally contain trillions of triangles, putting a huge burden on rendering, data transfer and storage of applications. Furthermore, most of the reconstructed meshes lack geometric details and therefore do not represent a good choice for 3D navigation, and AR/VR.  

“High fidelity digital representations of cities are essential for modern-day applications such as urban planning, 3D navigation, and augmented/virtual reality (AR/VR),” explains Dr. Poovvancheri. “This project aims at bridging existing gaps in urban modeling pipeline by developing an AI (Artificial Intelligence) driven urban modeling software ecosystem consisting of algorithms, tools, and data for creating lightweight and highly detailed 3D urban models.”

The Honourable François-Philippe Champagne, Minister of Innovation, Science and Industry, announced more than $64 million to support 251 research infrastructure projects at 40 universities across Canada.

A summer of starlings: students benefit from summer research opportunity

The beautiful birdcalls of starlings are a fixture of the Saint Mary’s University campus. The more than 40 starling nest boxes across campus are part of a research project led by Dr. Colleen Barber. The boxes were erected almost two decades ago and have provided research opportunities for numerous students and field assistants. This photo gallery shows Saint Mary’s students Gabi Armstrong and Alyssa Wells checking on the starling boxes and shares some insight into their roles as student researchers.


Additional reading

Minister of Environment and Climate Change, Tim Halman, tours Belcher Street Marsh Site

Saint Mary’s University professor Dr. Danika van Proosdij and her TransCoastal Adaptations team members had the opportunity to present their work to the Honorable Tim Halman, Nova Scotia Minister of Environment and Climate Change. The presentation included an interactive tour to showcase the design, implementation and monitoring of the Belcher Street Marsh Dyke Realignment and Tidal Wetland Restoration Project.

The project includes 75 hectares of tidal wetlands along Nova Scotia’s Bay of Fundy that van Proosdij’s team is working to restore habitat and protect against flooding and coastal erosion. Using nature-based strategies and restructuring old dyke infrastructure, the team creates new tidal wetlands to absorb rising sea levels, protect nearby communities and create new ecosystems for marine life.

The newly realigned dyke at the Belcher Street Marsh protects the active agricultural land behind it. The restored tidal wetland will increase the natural absorption of wave energy during storms, thereby protecting the dyke. The expanded floodplain provides more room for floodwaters. The new marsh is now a productive natural habitat supporting species diversity. The dykes overlooking the new marsh provide a recreational opportunity for enjoying nature and connecting to the restored natural condition of the site. The site is a living laboratory and training site to develop dykeland realignment and marshland restoration skills.

Want to learn more? Join TransCoastal Adaptations for a workshop on Climate-Resilient Coastal Nature-Based Infrastructure, June 29–30.

TransCoastal Adaptations is a Centre for Nature-Based Solutions at Saint Mary’s University that engages in research and partnerships that promote and undertake projects related to climate change adaptation.

Enactus Saint Mary’s secures spot in national finals

A large group of students cheering on stage with an Enactus sign behind them,

The Saint Mary’s Enactus Team

For the ninth time in 11 years, Enactus Saint Mary’s is off to the final round of competition at the Enactus Canada National Exposition in Toronto this September. At this in-person competition, Saint Mary’s University will compete against Toronto Metropolitan University, Wilfred Laurier University, University of Ottawa and Okanagan College for the title of national champion. 

These students have already gone through two rounds of competition, and those who succeed at the national final will compete at the Enactus World Cup, representing their country. Enactus, an international non-profit social enterprise, supports different student groups and small businesses aiming to tackle social, economic and environmental problems. With more than 2,000 schools from 33 countries taking part in Enactus each year, Saint Mary’s has an incredible opportunity to represent Canada this year. 

With three months until the highly anticipated competition, Enactus Saint Mary's is looking forward to the final round ahead. 

“[We’re] thrilled to be in the top five Enactus teams in Canada,” says Susan MacInnis, a co-president of the team. “Our amazing and supportive team are more motivated than ever to work together, expand our projects, and personal and professional development.” 

Highlighting their food insecurity program, Square Roots, and their digital education program, Options Online, Enactus Saint Mary’s members are ecstatic to have a chance to win a $10,000 grand prize, along with the national champion title to further impact their community. 

Enactus Saint Mary’s are moving forward proudly, with support from various local and global partners and sponsors. One of these partners, Saint Mary’s University Entrepreneurship Centre (SMUEC), is especially supportive of Enactus Saint Mary’s. 

“I’m proud to support these amazing Saint Mary’s students and excited for them to share their innovative, problem-tackling ideas in the final round,” says SMUEC Director Michael Sanderson, one of the faculty advisors for the team. “This year Enactus Saint Mary’s has a great chance to become the national champions.” 

Reflecting on the past rounds and looking forward to the next, Co-President Maddie Bristol says, “We are putting our best foot forward on the National stage in September in Toronto. The coming months will show our commitment to positive community and environmental impact and our dedication to representing Saint Mary’s on stage.” 

Learn more about Enactus Saint Mary’s.

Studying the ‘Right’ Genes

Research project examines the genes of endangered North Atlantic right whales to understand low reproductive rates.

By Jessica Long

Three people in masks in a lab.

Dr. Tim Frasier, Carla Crossman, and Kate Chadwick

North Atlantic right whales have been listed as an endangered species in Canada and the United States since 2005. There are an estimated 350 North Atlantic right whales left in the world, and fewer than 100 of those are breeding females. In addition to having a high mortality rate from entanglement in fishing gear and vessel strikes, the low reproductive rate of right whales has perplexed scientists. The right whale’s reproductive rate is three times lower than their known potential. Additionally, a relatively high percentage of females have either never given birth or have had only one calf. The females with multiple calves reproduce on average every six to ten years, as opposed to the expected three-year cycle.

In collaboration with the New England Aquarium and Genome Atlantic, Saint Mary‘s University Biology professor Dr. Timothy Frasier, a specialist in genetic analyses and marine mammal behaviour, is studying the genetic makeup of right whales to understand what factors might be impacting their ability to breed.

“I am excited to continue and deepen our long-standing collaboration with Dr. Frasier,” says Phillip Hamilton, Senior Scientist at the New England Aquarium. “We have been working together for over two decades to better understand the genetic aspects of this beleaguered species. This new work opens the ability to answer long-standing questions and we are curious to see what we will discover.“

Frasier’s research aims to make right whale conservation more effective and efficient while influencing policy change and development to better manage right whale conservation in North America.

The Office of Innovation and Community Engagement facilitates research relationships between Saint Mary’s University and companies, government departments and community organizations.

Read about more innovative partnerships between Saint Mary’s University faculty and industry partners in their 2022 report.