Canada鈥檚 vast northern landscapes are laced with rivers, streams and lakes, sustaining a rich variety of wildlife and plentiful drinking water. How can we best protect those gifts of nature for future generations, even as the country鈥檚 population and demand for resources swell?
Dalal Hanna spent the past five years exploring that question for her recently completed PhD degree in Natural Resource Sciences at 捆绑SM社区. She has already published three scientific articles based on the research. But she鈥檚 also managed to reach a much wider audience, sharing her findings and her love of the outdoors with kids, teenagers and curious adults in a variety of ways: running canoe-camping expeditions for young women, producing science podcasts, and telling stories from the field through a National Geographic program for up-and-coming leaders committed to protecting our planet and the life it supports.
鈥淔reshwater ecosystems are a lifeline to our very existence,鈥� Hanna says in a featuring her work on Canada鈥檚 rivers. 鈥淭hey support immense biodiversity, provide clean drinking water, and are powerful places where we can connect to both nature and ourselves.鈥�
As a member of the 捆绑SM社区 Sustainability Systems Initiative鈥檚 Landscape Scholars program, Hanna has also been part of a project bringing together young researchers from different disciplines to find ways to manage the planet鈥檚 resources more equitably and sustainably.
鈥淒alal is a brilliant scientist with a real knack for choosing interesting and important questions and absolute dedication to answering those questions deeply and thoughtfully through her science,鈥� says Professor Elena Bennett, Hanna鈥檚 PhD supervisor and co-leader of the Landscape Scholars program. 鈥淪he has an equally impressive commitment to public education about science, and especially about the valuable streams, lakes, and other ecosystems of Qu茅bec and Canada.鈥�
Paddling across Canada
Growing up around Ottawa, Hanna got hooked on canoe-camping at summer camps. After earning a BSc degree in Environmental Sciences at the University of Ottawa in 2011, she set out on a six-month, cross-Canada canoe trip.
The expedition raised funds for the Canadian Parks and Wilderness Society and awareness for watershed conservation 鈥� and raised Hanna鈥檚 own awareness of 鈥渆cosystems that are so beautiful, and yet threatened.鈥� While the group was canoeing along the Athabasca River in northern Alberta, for example, she was struck by the strong smell of nearby tar-sands processing plants. 鈥淚t was one of the few places, paddling across the entire country, where we were told not to drink the water out of the river,鈥� because of possible contaminants that couldn鈥檛 be easily filtered. 鈥淭hat moment marked me.鈥�
Science storytelling
That journey crystallized Hanna鈥檚 desire to pursue graduate studies in freshwater ecology. At 捆绑SM社区, she did an MSc degree in biology, studying mercury concentrations in African freshwater fish. She authored two articles in peer-reviewed environmental journals with her supervisor, Professor Lauren Chapman.
Hanna next spent a year with fellow 捆绑SM社区 graduate Andrea Reid producing a podcast called . To make sure the content would be accessible to non-scientists, Hanna and Reid limited the vocabulary in their scripts to the 1,000 most common English words.
鈥淚 learned a ton about communicating science,鈥� Hanna says. 鈥淚 think it plays a really important role in helping us understand how the world works 鈥� and through that we can make better decisions.鈥�
Studying Quebec鈥檚 streams
For her PhD research in the , Hanna turned her focus back to the forests and streams of rural Qu茅bec. Her research explored the best ways to keep rivers healthy. She spent much of her time gathering and studying samples from waters between the and provincial parks. She also measured the girth of trees along the banks of streams and rivers, to gauge how much carbon is stored in the watersheds.
One takeaway message from her work: changes in land use 鈥� converting forests to farms, for example 鈥� can have huge impacts on the freshwater ecology. Assigning protection status to a watershed is a strategy that can help protect streams, their biodiversity, and the ecosystem services they provide.
Close encounters with creepy critters
Hanna鈥檚 own fieldwork adventures provide plenty of storytelling fodder. Having bushwhacked through a tangle of small trees along a stream near Qu茅bec鈥檚 one autumn day, Hanna paused to measure a tree trunk. As she reached out with her measuring tape, she looked down and saw thousands of wasps swarming at her feet.
鈥淚t wasn鈥檛 the first time I鈥檇 stepped on a wasps鈥� nest,鈥� she says, 鈥渂ut it was the first time I couldn鈥檛 run away.鈥� Fortunately, her clothing was heavy enough to provide some protection. Backing up cautiously through the thicket, she managed to beat a retreat with fewer than 10 stings on her hand 鈥� though she did lose the measuring tape.
Then there are the leeches. In a for schoolchildren on YouTube earlier this year, Hanna was asked by one viewer: 鈥淲hat鈥檚 the grossest thing you鈥檝e ever found?鈥� Her response: 鈥渁 really big leech on my leg.鈥� She reassured the kids, however, that 鈥渓eeches aren鈥檛 really that bad -- you just remove them from your skin, and it鈥檚 not a problem.鈥� (While they may seem gross, leeches are an important food source for many fish that we value, Hanna notes.)
Getting youth involved
Back in Ottawa, where she recently began a postdoctoral fellowship at Carleton University, Hanna aims to conduct research that will help federal policymakers identify the best ways to protect the country鈥檚 freshwater ecosystems.
She also hopes to expand , a Canadian charitable organization that she cofounded with her podcast partner Reid, now an Indigenous fisheries scientist. Riparia鈥檚 mission is to engage young women with freshwater science. The group鈥檚 signature program brings participants on a free week-long canoeing and camping trip in the of Qu茅bec, where Hanna got her own first taste of canoe-camping as a youngster.
鈥淚鈥檓 really committed to trying to break down some of the barriers that exist between scientists and the public,鈥� Hanna says. 鈥淎nd I think one way of doing that is getting youth involved in the science that we do.鈥�