Two Saint Mary’s University scientists receive $795,000 in research funding

Two researchers in the Faculty of Science at Saint Mary’s have received a total of $795,000 in funding from two government organizations.

Dr. Erin Adlakha and Dr. Erin Cameron will have their work, on hydrothermal ore mineral deposits and soil invertebrates, respectively, funded in equal parts by grants from Canadian Foundation for Innovation John R. Evans Leaders Fund and from Research Nova Scotia.

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Dr. Erin Cameron : “Global change impacts on soil invertebrates”

A researcher in the department of Environmental Science, Dr. Cameron’s work focuses on increasing understanding of the impacts of climate change and land use on below-ground ecosystems.

Dr. Erin Cameron

“Much of our understanding of these impacts in terrestrial ecosystems is based on aboveground organisms,” explained Dr. Cameron. “In contrast, although soils support high levels of biodiversity and provide key ecosystem services such as decomposition and carbon storage, we have a limited understanding of global change effects below ground.”

Her research seeks to address this gap in our knowledge by examining how climate change, land use change, and invasive species (earthworms) affect communities and ecosystem services (e.g., carbon dioxide flux) in Nova Scotia, Canada's North, and globally, using a combination of field observations, experiments, lab analyses, and modelling.

In Nova Scotia, her work will focus on examining how human disturbances may be affecting soil biodiversity and the ecosystem services provided by soil in forests, and on examining the spread and effects of non-native earthworms. This work will increase understanding of impacts of global change on soil biodiversity and ecosystem functioning and inform effective management of climate change and invasive species in Canada.

Read more about Dr. Cameron’s recent cover story in the prestigious Science Magazine, in which she studies the global diversity and biogeography of earthworms.

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Dr. Erin Adlakha: “Characterizing Alteration Footprints of Hydrothermal Ore Deposits Using Super Light Element Micro-X-Ray Fluorescence” 

A faculty member and researcher in the Department of Geology at Saint Mary’s, Dr. Adlakha’s research focuses on hydrothermal ore mineral deposits, which we mine for the metals that we use in everyday life. Part of Dr. Adlakha’s research is to understand the source of fluids and metals, and identify the chemical or physical “traps” that cause ore deposition.

Dr. Erin Adlakha

“These deposits precipitate from fluids (e.g. seawater, meteoric water, magmatic fluids) that circulate through Earth’s crust along structures — faults, fractures, mineral grain boundaries —and dissolve metals from the rocks that they pass through,” explained Dr. Adlakha. “When the fluids encounter a chemical and/or physical change, a reaction may occur that triggers the precipitation of economic minerals.”

“I am also interested in the mineralogy and chemical variation of un-economic alteration minerals that form as different fluids circulate through Earth’s crust, as they guide exploration geologists to find new deposits,” she added.

This CFI award will be used to purchase a Super Light Element Micro X-Ray Fluorescence Spectrometer to characterize the complex ore and alteration systematics of different ore systems, including polymetallic Co deposits in Nova Scotia, Canada; W skarn deposits of the Canadian Cordillera; and polymetallic deposits of the Nonacho Basin, Northwest Territories.

“The results of this research will be used to develop deposit models that describe how hydrothermal ore deposits form, and provide exploration vectors for these deposits, thus contributing to the longevity and sustainability of Canada's exploration and mining programs,” said Dr. Adlakha.

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About the Canadian Foundation for Innovation

The Canada Foundation for Innovation (CFI) was built on the ideals of thinking big and investing in areas that matter to Canadians. Since its creation in 1997, the CFI has ensured Canadian researchers have the tools — the cutting-edge labs, facilities and equipment — they need to push the frontiers of knowledge in all disciplines, and to contribute to the full spectrum of research — from discovery to technology development.

The John R. Evans Leaders Fund enables excellent researchers to undertake leading-edge research by providing them with the foundational research infrastructure required to be or become leaders in their field. In turn, this enables institutions to remain internationally competitive in areas of research and technology development, aligned with their strategic priorities. 

Research Nova Scotia

Research Nova Scotia (RNS) is a not-for-profit corporation established to enhance research capacity and align research funding with provincial priorities. RNS invests in research that builds and translates knowledge to help ensure a sustainable and prosperous future for Nova Scotia. This support for the research community in our province helps to advance strategic growth in Nova Scotia, and contributes to innovation in the healthcare system in Nova Scotia. 

SMU researcher’s groundbreaking earthworm study on recent cover of Science Magazine

Dr. Erin Cameron, a researcher in the department of Environmental Science, has published a paper in the prestigious Science Magazine on her work studying the global diversity and biogeography of earthworms.

The study had two main findings: that local species richness (the number of earthworm species at a site) was higher in temperate regions of the world compared to tropical areas, and that climate is the strongest driver of earthworm diversity. This suggests that future climate change could significantly alter earthworm communities worldwide, threatening the many functions they provide.

“Having her research recognized by such a prestigious scientific publication is a testament to Dr. Cameron’s innovative work in the field of environmental science,” said Dr. Lori Francis, acting Dean of Science at Saint Mary’s University. “The huge scope of her collaboration with such a large international group of scientists is impressive, and this work will allow further collaborations with other leaders in this field and answer important questions about effects of global climate change on earthworm communities.”

“Having her research recognized by such a prestigious scientific publication is a testament to Dr. Cameron’s innovative work in the field of environmental science.”

— Dr. Lori Francis, acting Dean of Science at Saint Mary’s University

Dr. Cameron and her German collaborator Prof. Nico Eisenhauer were the senior authors on the paper, with their postdoc Dr. Helen Phillips as the lead author. The research, based at the German Centre for Integrative Biodiversity Research (iDiv) and Leipzig University in Germany, used research compiled from 140 researchers from across the globe to create the largest earthworm dataset worldwide, encompassing 6928 sites in 57 countries.

First conceived in 2014 at a global earthworm conference after a workshop discussing questions concerning diversity patterns of earthworms, this report has been years in the making. The researchers looked at questions about what factors drive global patterns of earthworm diversity: soil properties such as pH and the organic carbon content of soil, or habitat cover, or climate: i.e. temperature and precipitation. Dr. Cameron had previously looked at earthworm distributions in the boreal forest of northern Alberta, and was intrigued by earthworms found further north than expected.

Earthworms substantially shape the way ecosystems function: their burrowing creates holes, mixes soil components and they eat organic debris. By doing so, they drive a wide range of ecosystem services, including nutrient provision, water infiltration and run-off, carbon storage, climate mitigation and seed dispersal.

“Earthworms are ecosystem engineers; they are species with a large impact on the structure of ecosystems,” said Dr. Cameron. “While the impact of earthworms on their local ecosystems is fairly well known, until now there has been no research or data on the distribution of earthworms at a global scale.”

“A surprising result of this study was that the biodiversity patterns in above-ground organisms do not match those of soil organisms, with a greater local diversity found in more temperate climates compared with tropical locations,” Dr. Cameron explained. “As typically the highest number of species in a local area is found in the tropics, this result was not expected, however we suspect that the total number of earthworms across the tropics is still higher than other regions due to dissimilarity among sites.”

“This is a seminal accomplishment in climate change research which Dr. Cameron has achieved so early in her professional career, with this being the first time Saint Mary’s research has been featured on the cover of Science Magazine,” said Dr. Adam Sarty, Saint Mary’s University’s Associate Vice-President Research.  “Her ability to lead this large international collaborative project, and provide a truly global perspective, makes us excited to see where her next projects will lead as she joins the growing team of Saint Mary’s University researchers focusing attention on the impacts of, and responses to, the effects of climate change.”

The research also found that the biggest driver of diversity in earthworm communities was climate, namely precipitation and temperature. “These organisms are an important part of our ecosystem, and below-ground biodiversity must be considered when considering the effects of climate change on our ecosystems,” said Dr. Cameron.

The study and its resulting comprehensive global map used as much data on earthworm diversity, abundance and biomass as possible. Future stages of this work will project earthworm diversity levels in the future.

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Dr. Erin Cameron is an assistant professor in the Environmental Science department at Saint Mary’s University. Her research examines effects of global change on species distributions, community composition, and ecosystem functioning. She uses a combination of field observations, experiments, citizen science, molecular approaches, data synthesis, and modelling to assess global change impacts across spatial and temporal scales. Dr. Cameron was recently awarded an NSERC Discovery Grant with a Northern Research Supplement.