Getting to the core of climate change in an ecotone? - Donya Danesh

Ph.D candidate, Biology
Getting to the core of climate change in an ecotone? - Donya Danesh

Donya Danesh鈥檚 PhD work in paleolimnology on a subfield with only a few remaining experts in the world has taken her from the deepest parts of remote Northwest Ontario lakes to the shores of an old world city (Amsterdam), to visit two of those experts at the at the Institute of Biodiversity and Ecosystem Dynamics (IBED) at University of Amsterdam.

Danesh鈥檚 academic work focuses on long-term climate impacts to fresh water resources. But her world has long been organized around water 鈥 the child of two environmental engineers, she grew up interacting with water in ways that taught her that there was more to appreciate about it than the surf at the beach, collecting invertebrates from the sediments and learning how to take flow measurements.

The work she is doing now started in her undergraduate at Brock University where she wrote an honours thesis in palynology (the study of fossil pollen) with researcher Dr. Francine McCarthy, initially studying dinoflagellates, a kind of algae it turns out are rather tricky for novice eyes to identify under the microscope. Danesh鈥檚 supervisor therefore suggested she first try counting everything she could see under the microscope so her eyes could become more familiar with the different structures of organisms. But when she did, she discovered a plethora of other structures of interest 鈥 what are called non-pollen palynomorphs (NPPs). That is, microfossils other than pollen and spores from plants found within samples prepared for pollen analyses, including moss, bits of grass, charcoal, fungi, fossil algae etc.

This was one of those moments when the blue skies of primary research open up, and a scholar starts down a path they never expected. Danesh鈥檚 imagination was captivated by the potential 鈥渦tility of these not-so-well studied microfossils.鈥

In Danesh鈥檚 research NPPs are proving to be important indicators of what was going on in the lakes at the time when they fossilized. The study region of interest for Danesh is what鈥檚 called an 鈥渆cotone,鈥 a climatically sensitive transitional region between two niches 鈥 in this case, the border between Manitoba鈥檚 prairies and Ontario鈥檚 boreal forest. Danesh hopes to use the information she has gained from the terrestrial indicators (fossil pollen) coupled with the information she will gain from the exploratory research of NPPs to try to paint a more colourful picture of what changes have occurred in the past (due to climate) in this region.

There are many other well-established biological proxies that are good indicators of the impact of climate to lakes systems, but NPPs can provide a unique opportunity to tell us something more, because each year sediment is deposited to the bottom of the lake, and as a result things are fossilized. These sediment layers are like tree rings; each layer shows us 1 - 10 years of lake history. To answer the question of long-term change though, Danesh has to dig deep 鈥 her research covers the time since the last glaciation, meaning the past 10,000 years. So, in an aluminum boat with a device called a 鈥渃orer,鈥 Danesh and supervisor put some elbow grease into it, boring down 5-10 metres of lake sediment.

It鈥檚 been five years on this topic, and Danesh says with a grin she 鈥渃an鈥檛 let it go just yet.鈥 Hopefully she doesn鈥檛, because if she鈥檚 not carrying the NPP torch, so to speak, it might burn out 鈥 the remaining world experts Dr. Bas van Geel and Dr. Peter Coesel are both retired. However, there has been an increased interest in the use of NPPs in the last decade, thanks to the efforts of Dr. van Geel, and it鈥檚 this momentum Danesh is running with.

In Danesh鈥檚 first year at Queen鈥檚 she was invited to attend a 3-day workshop at the University of Amsterdam by Dr. van Geel in her previous supervisor鈥檚 stead, since she couldn鈥檛 make it. 鈥淚t was amazing to be around likeminded people,鈥 Danesh says. 鈥淣o one else works on these organisms! Everyone was so helpful, kind, and collaborative. Before I left I said to myself 鈥業鈥檓 coming back here 鈥 I don鈥檛 know when or how but it鈥檚 going to happen.鈥 I even told Dr. van Geel.鈥

This year Danesh made her dream come true. Her supervisor Dr. Cumming had said that if she could outline a plan to return to the University of Amsterdam for research, he would support it. Therefore she worked on an application to the Dean鈥檚 travel grant, but it was unsuccessful. Undeterred, Danesh wrote directly to Dr. van Geel and Dr. Coesel, who generously said that they would be more than happy to have her as a visiting scholar and offered access to all of the resources and information that she鈥檇 need. Luck also had it that Danesh鈥檚 own sister had been so infected by her enthusiasm for the University of Amsterdam that she had begun a Master鈥檚 in Communication there in the meantime, so Danesh had yet another happy host.

Over the month she is spending at the state-of-the-art Paleo Ecology Lab in Amsterdam 鈥 which will be followed by a shorter visit at Brock University鈥 one of the most important parts is just spending time with scholars who have a whole career behind them. 鈥淭his kind of intergenerational knowledge transfer is so valuable for solving problems,鈥 Danesh says, and indeed, sometimes for the very continuity of a field.

Collaboration has long been a motto for Danesh. That鈥檚 how she co-founded (and currently chairs) the now hugely successful . 鈥淕rad school can be a little bit isolating,鈥 she explains, 鈥渁nd so in 2013 I signed up to help run a local water symposium for grad students at Queen鈥檚 and RMC in hopes of making new friends and becoming a part of the community.鈥

The results shocked her. That year students from Queen鈥檚 and RMC came out in droves, with the upshot of connecting formerly unacquainted researchers not just working in the same buildings but working on solutions to parts of each other鈥檚 research questions. 鈥淚f this could happen at Queen鈥檚,鈥 Danesh and her co-organizers wondered, 鈥渋magine what could happen across Canada?鈥 It was then that they decided to create a conference, and so a one-off symposium became WatIF, which grew to national, and this year, for the first time, international proportions.

In the spirit of spreading ideas that matter, Danesh鈥檚 current dream is to give a TED talk. 鈥淩eally all I want to do is work hard and empower the people around me and live by what I say. If I can lead by example I can help people to become the best versions of themselves, to feel empowered, and inspired.鈥 The nomination isn鈥檛 a sure thing yet, but it鈥檚 safe to suggest keeping an eye out for Danesh this year on a stage near you.