top of page

Our Team

The Paleoecology Lab is led by Kathryn Hargan in the Department of Biology at Memorial University of Newfoundland. 

Me in Montana D'Oro - Copy.JPG

Dr. Kathryn Hargan

Associate Professor

​

Department of Biology

Memorial University of Newfoundland

45 Arctic Ave.

St. John's, NL A1C 5S7

Office: CSF4225; Telephone: 1-709-864-4754

Email: khargan[at]mun[dot]ca

Education and experience:

2017-2019: EnviroLab Asia PDF, Claremont McKenna College, Williams Marine Environmental Change Lab 

2015-2017: W. Garfield Weston PDF, University of Ottawa, Blais Environmental Tracers and Contaminants Lab

2010-2015: PhD, Queen's University, Paleoecological Environmental Assessment and Research Laboratory

2008-2010: MSc, Trent University with Dr. Peter Dillon, Professor Emeritus 

Our research lab is diverse with students from many backgrounds. Paleolimnology professors can be found in geology, geography, environmental science, earth science, and biology departments due to the interdisciplinary nature of our research, so please do not hesitate to inquire about an opportunity with me even if your undergraduate degree or MSc is not in Biology. Students have access to state-of-the-art scientific equipment (e.g., GC-MS, ICP-MS) through the CREAIT facilities at MUN, and the opportunity to learn many established and emerging tools and proxies for inferring long-term environmental change. To answer large research questions, many of our projects are indeed collaborative across departments, institutions, and with federal and provincial governments such as Environment and Climate Change Canada and Parks Canada. Our lab is an open environment that recognizes the benefits of building trusting collaborations among students and researchers.

Katie hong Kiu lau, phd candidate

6917E2F2-0431-4B91-8476-47DCF9567CCB_1_201_a.jpeg

I’m Katie from Hong Kong, a PhD student studying seabirds using paleoecology. I completed my bachelor’s degree in Geography at the Baptist University of Hong Kong. Because of my enthusiasm for birds, I pursued a MSc degree in Ecology at the University of Aberdeen, UK. During my master’s degree, I joined the Lightning House Institution to track northern fulmars on Eynhallow, Orkney. I studied the time of arrival, geolocation and activities of fulmars during their pre-laying exodus. After I graduated from Aberdeen, I worked in a climate modelling laboratory at the University of Hong Kong as a research assistant for three years. In the lab, I worked on the development of a novel set of high-resolution global lightning data and reconstruction of past lightning as well as simulation of future lightning. During my time in HKU, I have developed my interest in programming and paleoecology. I wish to combine my experiences in seabird and climate research for my PhD. I will be reconstructing seabird abundances at their breeding colonies and investigating the influence of anthropogenic impacts and environmental changes on their long-term population trends.

 

GitHub: https://github.com/hkLAU

ResearchGate: https://www.researchgate.net/profile/Katie-Hong-Kiu-Lau

Google scholar: https://scholar.google.com/citations?hl=en&user=XH5mylEAAAAJ

juliana velandia, phd student (2025- ) 

WhatsApp Image 2026-10-08 at 4.51.14 PM.jpeg

Hola! I’m Juliana, a PhD student in the Hargan Paleoecology Lab at MUN. I completed my BSc in Geology in Colombia and my MSc in Geology in Saskatchewan. My path into paleoecology has changed quite a bit over the years. I started by studying the geochemistry of mafic rocks from monogenetic volcanoes in Colombia. Although I enjoyed working with volcanic rocks and geochemistry, I have always been fascinated by Earth’s climate and environmental history. This interest eventually led me to shift my research focus from volcanic deposits toward paleoclimate and paleoecological records. Along the way, I have had the opportunity to work with the geochemistry of lacustrine environments, subrecent freshwater ostracods, and study ostracod carapaces using trace elements and stable isotopes. During my PhD, I am investigating C accumulation rates and C stocks in peatlands on the island of Newfoundland, as well as C stocks in peatland permafrost in southern Labrador. I am excited to bring together my background in geology and geochemistry with my interest in past climates and environmental change. So far, I can definitely say that I am in the right place! I’m excited about where this research will take me and look forward to sharing some exciting results.

Anuradha joshi, phd student (2026- ) 

1000151535.jpg

My name is Anuradha Joshi, and I am a PhD student at Memorial University, where I am co-supervised by Dr. Kathryn Hargan and Dr. Jantina Toxopeus (St. Francis Xavier). I am exploring the impacts of saline stress on freshwater invertebrates using multidisciplinary methodologies from paleolimnology, experimental biology, and transcriptomics. I'm new to paleo techniques, but they continue to fascinate me.


My intense fascination with the natural world has previously led me to many interesting projects. In 2025-26, I carried out a short but deeply engaging stint as a project trainee at an eco-evo lab specialized on ants in peninsular India. My master's thesis focused on the diet and gut microbiome of wild red pandas. I’ve worked with diverse model systems, including freeze-tolerant crickets and Wolbachia-infected insects—across labs in India as well at Dr. Jantina’s lab. One of my passions is turning complex research into engaging stories through writing and visuals. The excitement to learn new tools, collaborate across disciplines, and contribute to projects in ecology, stress biology, and conservation drives me forward!

Katie cothran, MSc student (2024 - )

Cothran Lab Site.jpg

Katie is an avid runner, reader, and former science teacher. With a background in E. coli and COVID research in the midwestern United States, she is expanding her background in paleoecology and soil analysis in Newfoundland. Katie's MSc project focuses on reconstructing nesting eider populations in southern Labrador. 

​

​​

thomas drover, MSc student (2025 - )

IMG_8519 (1).jpeg

I received my BSc in Environmental Science (Biology) from Memorial University’s Grenfell Campus in Corner Brook. During my time there, I was awarded an NSERC USRA to research cleaning procedures for trace element analysis of hair. Now, I have returned to my hometown of St. John’s to study paleoecology under Dr. Kathryn Hargan. I am currently working on coastal marine sediment cores from eastern Newfoundland. Through analysing environmental sedimentary DNA, metals, and various other paleoecological proxies, I hope to learn more about how human activities—especially fisheries—have historically impacted our ocean’s environment and its inhabitants.

kathryn cole, MSc student (2025 - )

iceberg.jpg

​Being a born and raised Newfoundlander, I have always been interested in nature, whether I'm spending time in our expanse of boreal forests or driving 10 minutes to see the ocean. Naturally, this has made me curious and want to understand how the environment works and how the species that call this province home interact. To satiate this curiosity, I attended Memorial University for my undergraduate degree, receiving my BSc. (Hons) in Biology (Co-op) in 2025. During this time, I learned about the captivating ecology of both terrestrial and aquatic habitats here in Newfoundland, while also having the opportunity to work with the Department of Fisheries and Oceans Canada (DFO) for my work terms and getting to spend time in the field studying these habitats. Ultimately, I found that my heart belongs to the water, and my Honour’s project reflected this, where I researched how a coastal fish community responded to temperature changes. After this, I wanted to keep researching coastal environments, which led me to Dr. Hargan’s lab. I had completed one of her courses during my undergrad, so when I was awarded an NSERC USRA, I reached out and asked about working in her lab, and I haven’t left since! My Master’s project relates back to my personal connection to the ocean, as I will be using paleolimnology methods to study historical capelin populations. I grew up watching the capelin roll, so I am excited to be working with this cool species and helping to ensure future generations get to experience it too!

laura colbourne, MSc student (2025 - )

742510945_1007161091956150_2825125863590601186_n.jpg

I’m Laura, a MSc student studying wetlands. I’m from the west coast of Newfoundland and have always had a love for nature, spending lots of time hiking and camping while growing up. With a desire to be outside, I completed my BSc (Hons) in Environmental Science at Memorial University’s Grenfell Campus in 2024. There, I did an honours thesis studying past construction impacts on the hydrology and vegetation of a local fen, which sparked my love of wetlands. The following year, I was fortunate enough to spend the summer as a conservation intern with the Nature Conservancy of Canada and Qalipu First Nations. There, I was able to broaden my knowledge and deepen my love for the environment. I was able to spend a lot of time in the field working on various projects in Newfoundland’s beautiful natural ecosystems. In Dr. Hargan’s lab, I am excited to continue researching wetlands and have taken on two MSc projects, both focused on wetlands. One project is focused on determining if diatom cell size can be used as an indicator of water table depth in peatlands. My other project is assessing accretion rates and carbon stocks of two coastal RAMSAR sites in Nova Scotia and Newfoundland. I hope that my research will uncover important information to help conserve these crucial environments.

Past Students & Lab Members

Picture for website-Ishraq Rahman.jpg

Ishraq Rahman, PhD (2026)
Tracking circulation of avian influenza viruses among wild birds in Atlantic Canada during an ongoing panzootic

f9AlLdgKTA+hcRvifagLeQ_thumb_130c.jpg

Alexandra, Zvezdin, MSc (2023)
Ecological changes on SGang Gwaay over the last millennium: uncovering forest changes and avian activitiy with respect to human settlement and invasive species

Johanna Bosch, MSc (2023)
From seabirds to sediments: the ecological footprint of seabirds at a prominent North Atlantic breeding colony tracked using a multi-proxy paleolimnological approach

20210718_130428-01.jpeg
Molly Morrissey.jpg

Molly Morrissey, MSc (2023)
Seabirds of Newfoundland and Labrador: Using stable isotope techniques to investigate changing diet over ~120 years and their influence on terrestrial coastal ecosystems

Veronica Smith, MSc (2023)
Paleolimnoglical techniques applied to an Indigenous Beothuk archaeological site in Newfoundland, Canada

Veronica Smith.jpg
Picture1.jpg

Amber Walker, MSc (2024)
Coprophilous fungi as paleo indicators for moose presence after introduction to Newfoundland

Maliya Cassels, MSc (2025)
Population trends in an Atlantic puffin (Fratercula arctica) colony determined from a ~500-year sediment core

Maliya Profile Pic.jpg
elizabeth mack image.jpg

Elizabeth Mack, MSc (2025)
Unveiling the seabird nesting history of Green Island, Witless Bay Ecological Reserve, NL using paleolimnology

Brady Rudh, MSc (2025)

Identifying diatom indicator species across environmental gradients in Newfoundland peatlands

PXL_20221007_204336016 (1).jpg
Courtney Lab Bio Pic.jpg

Courtney White, withdrawn from MSc 

Utilizing paleolimnology to track forest dynamics and insect disturbances in Newfoundland

John-Mark Bonneau
Science Technician 2024-2025

Paloma Saez Ochoa
Science Technician 2025

Kathryn MacDonald
NSERC USRA May-Aug 2025

Corner Brook Picture PalomaS.jpg


MUCEPs: Amy Mercer (May - Dec 2026); Rylan Herritt (Jan - Apr 2025); Kathryn Cole (Sept - Dec 2024); Alyssa Forget (Jan - Apr 2024); Lauren Gover (Sept - Dec 2023); April Griffin (Jan - Apr 2023); Arielle Przybysz (Sept 2020 - Apr 2021)

Kathryn Cole
NSERC USRA May-Aug 2024

Paloma Saez Ochoa
SURA May-Aug 2023; SURA May-Aug 2024

Madeline Sceviour
Undergraduate Research Assistant 

Ben Taylor
Science Technician Sept - Nov 2021

Jahnavi Kocha (CMC'19)

Thesis title: "A spatial and temporal analysis of Uranium concentrations around the abandoned New Hope Method mine in the Mohave Desert"

Jahnavi and Kathryn also traveled together to Pitzer College's Firestone Field Station in Costa Rica to study environmental changes across a gradient of land use (banana and bamboo plantations, primary and secondary forest). 

Alison Hong (CMC'19) 
Thesis title: "Tracking the role of trophic position on copper, zinc, manganese and arsenic accumulation in Thai mangrove molluscs"
Alison's thesis is published in the journal Ecological Indicators.

Jahnavi and Kathryn at the Firestone Field Station in March 2019

image.jpg
20181207_142329.jpg

Alison at the Keck Science thesis poster day, Dec 2018

bottom of page