Michelle Tseng

Assistant Professor

Research Interests

Insect & plankton ecology
Community and evolutionary ecology
Community responses to warming

Relevant Degree Programs

Affiliations to Research Centres, Institutes & Clusters

Research Options

I am available and interested in collaborations (e.g. clusters, grants).
I am interested in and conduct interdisciplinary research.
I am interested in working with undergraduate students on research projects.
 
 

Research Methodology

Temperature controlled plankton and insect growth
High throughput algae imaging

Recruitment

Master's students
Doctoral students
Postdoctoral Fellows
2022
2023

Please see our lab website for details of our research interests: https://www.bugsandplankton.com/

In fall 2022, the lab will be looking to recruit 1-2 graduate students for a fall 2023 start. Preference will be given to someone interested in responses of plankton communities to warming. I am especially interesting in someone who is interested in experimental evolution of algal populations/communities and who is interested in physiological (e.g. lipid & fat content, cell metabolism) as well as in eco/evol traits. 

I will also consider students interested in working on temperature adaptation in mosquitoes, zooplankton, or phytoplankton.  Students who are interested in pollinator ecology exclusively are encouraged to seek out the many professors who specialize in this topic on campus. 

You have a strong background in population and community ecology, including life history theory. You have a deep understanding of evolution by natural selection and understand the differences between terms like adaptation, traits, selection, and evolution. Ideally you have done research as an undergraduate and your transcript is competitve for NSERC or equivalent funding. You enjoy working in a team-setting and are happy to help out others in the lab. 

I support public scholarship, e.g. through the Public Scholars Initiative, and am available to supervise students and Postdocs interested in collaborating with external partners as part of their research.
I support experiential learning experiences, such as internships and work placements, for my graduate students and Postdocs.
I am open to hosting Visiting International Research Students (non-degree, up to 12 months).
I am interested in supervising students to conduct interdisciplinary research.

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Graduate Student Supervision

Master's Student Supervision (2010 - 2021)
Nutrients in a changing world: the effects of warming and predator presence on prey quality (2021)

The field of climate change impacts on ecology primarily focuses on the measures of abundance and distribution of individuals to assess organism response, but the measure of organism quality is not often applied to assessing organism response within food webs. The abiotic factor of temperature has known effects on organism quality, but it is unclear how the biotic factor of predator presence impacts organism quality. The goal of my thesis was to investigate (a) the combined effects of warming and predator presence on prey nutrient quality, and (b) how temperature affects organism quality and the nutritional needs of consumers. To address the combined effects of warming and predator presence on one measure of prey quality - organism body size - I conducted a meta-analysis on 14 papers that tested both warming and predator presence on prey body size in aquatic systems. Across all studies, I found no net effect of warming on body size, a large increase in prey body size with predator presence, and an additive effect of the two factors combined. I then conducted a laboratory experiment using the primary producer Scenedesmus obliquus, the primary consumer Daphnia pulex, and the secondary consumer Chaoborus americanus to investigate temperature mediated changes in algal quality and consumer nutritional needs (measured using the fatty acid profile of algae that affected D. pulex population size and C. americanus growth rates). Overall, we observed changes in S. obliquus quality with temperature and mild cascading effects of these changes on D. pulex and C. americanus. Further investigation is needed into the effects of warming and predator presence on other nutrients (such as carbohydrates and proteins that may respond differently to temperature), and if the relationship between body size and quality holds true for all organisms. Overall, my thesis provides insight into how predator presence can have a stronger effect on organism body size than warming and suggests greater care must be taken when interpreting the results of studies that assess the effects of temperature on organism body size in the absence of biotic factors.

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