Benjamin Gilbert (PI)

Specific research projects can be seen in my publications, and some of my ongoing research projects are listed here

Graduate Students and Postdocs
Eric Harvey website
NSERC Postdoctoral Fellow
Trophic network structure, resilience and importance for mitigating disturbance
Trophic interactions can mediate the effects of global change on population and ecosystem dynamics either locally via bottom-up or top-down mechanisms or regionally via spatial cascade processes. In that context, the interaction between local and regional processes is paramount to predicting the impacts of anthropogenic disturbances on biodiversity and ecosystems. My research incorporates elements from food web and meta-ecosystem theory to study i) the way in which disturbances propagate in food webs ii) how these structural changes in the food web translate into functional change; and iii) finally, how do these functional changes can spatially cascade to affect regional-scale dynamics in terms of diversity and ecosystem functioning as well as the delivery of ecosystem services for human societies. I address those questions using a diversity of approaches including field and microcosm experiments.
Tess Grainger website[at]
PhD Candidate
Local and regional impacts of temperature on a plant-insect metacommunity
image012-e1449464417752I am interested in how the impacts of climate change on local processes (e.g., competition) and regional processes (e.g., dispersal) affect metacommunity dynamics. I am using the community of insects that specialize on common Milkweed (Asclepias syriaca) to explore these questions. For these insects, milkweed patches are the sole source of food and are connected by dispersing individuals. I am experimentally manipulating temperature to determine how it alters competitive and trophic interactions within patches and dispersal rates among patches. As metacommunity theory predicts that dispersal rate can strongly influence coexistence outcomes of species living in patchy environments, I’m interested to see whether climate-induced changes in dispersal exacerbate or dampen local-scale impacts of environmental change.
Denon Start website
PhD Candidate
Ecological and evolutionary influences on diversity in spatially isolated communities
denon-river-cropped-e1449465669844I study the ecological and evolutionary causes and consequences of trophic interactions, and how these processes are altered by spatial factors. I am currently combining field and microcosm experiments, observational studies, and theory to ask: (1) What characteristics of a community confer high or low levels of ecological drift (e.g., size, isolation, trophic level)? (2) How does predator loss in isolated habitats alter interactions between herbivores and plants? (3) Do consumer losses in isolated habitats create variation in consumer-resource coevolution? During my PhD I plan to address these and other questions loosely related by the themes of community assembly, species interactions, and coevolution.
Katie Brown
MSc Student
Decoupling the effects of population size and fragment size on pollination
katie-photo-framedI am broadly interested in how trophic dynamics affect species co-existence, and how these ecological processes are influenced by spatial factors. I am currently studying how pollinator foraging dynamics can influence the persistence of locally rare plant species in an experimental metacommunity. Through this work, I hope to understand: (1) the independent and joint impacts of community context and population size on plant reproductive success via pollinator visitation, and (2) whether pollinator mediated interactions are mainly facilitative or competitive for rare plant species and thus promote or reduce the probability of persistence. Through my MSc, I plan to address these and other questions related to the ecology and evolution of trophic interactions, species co-existence and community assembly.
Leila Forsyth
PhD Student
The influence of fragment size on functional trait diversity through space and time
leila-framed Anthropogenic changes, such climate change, affect species interactions with each other and their environment, but the long term effects of these changes are still unknown. I am interested in the effects of a changing environment on species interactions and coexistence. For my Master’s, I am looking at the effects of fragmentation on an experimental plant metacommunity, using functional traits to measure community-wide changes that may occur due to fragment size. My goal is to test whether the loss and gain of functional diversity in smaller fragments is due to random chance alone by comparing fragment data to the expected random shift in traits that should occur through species-area relationships and species-time relationships.
Emma Walker website
MSc Student
The relative importance of habitat destruction and degradation on extinction trajectories in metapopulations
EmmaI am a biologist with a passion for mathematical puzzles, from which an interest in dynamic systems and theoretical ecology has stemmed. A puzzle I am currently working on for my MSc is how large-scale changes (e.g. climate change or invasive species) versus localised events (e.g. habitat destruction or point source pollution) affect the dynamics of metapopulations and whether they will persist in the long-term, or be set on a trajectory towards extinction. Specifically, I am interested in the switching points in the relative impacts of these two processes given differences in the spatial structure of habitat patches and species’ life-history traits.
Graduate and Postdoc Alumni
Rachel Germain website
The ecology and evolution of coexistence mechanisms in Mediterranean annual plant communities
Rachel-field-work-e1449356571674I study the ecological causes and consequences of the evolution of coexistence mechanisms, and how these may be moderated by local conditions on shorter timescales. By combining mathematical theory with field and greenhouse experiments in annual plant communities, my work addresses three questions: (1) how do species differences, environmental variability, and biogeographic history combine to regulate phylogeny-coexistence patterns in nature, (2) how do lagged responses to the environment and competition, through parental effects, alter species dynamics, and (3) what role does the interaction between spatiotemporal variability in the environment and dispersal play in shaping patterns of diversity?
Natalie Jones (PhD 2016)
website email
Understanding how life-history traits and environmental gradients structure diversity
image005For my doctoral dissertation, I am testing 1) factors that limit species distributions across latitudinal gradients and how these factors may be influenced by global climate change, and 2) how temporal ‘insurance’ or ‘resurrection’ dynamics may mitigate these changes. I am using a mixture of sampling and experimental approaches to address these questions, with all work based on aquatic zooplankton communities that I sampled along a latitudinal transect from southern British Columbia to the Yukon Territory.
Kelly Carscadden (MSc 2015)
google scholar email
Niche breadth differences in Mimulus
image011It is commonly observed that geographic range sizes and niche breadths of even closely related species can differ dramatically. The mechanism underlying a species’ niche breadth carries implications for future adaptive potential. Under the umbrella of the niche breadth hypothesis, I’m investigating a number of questions using monkeyflowers: 1) How are phenotypic plasticity and local adaptation contributing to niche breadth; 2) In a species with wide niche breadth, is this breadth found within or between populations; and 3) Is the degree of environmental heterogeneity encountered across a species’ range reflected in its functional traits
Emily Drystek (MSc 2014)
current position email
The effect of local adaptation on colonization dynamics in an alvar metacommunity
image009Alvars are distinct habitat patches, formed with a thin layer of soil on a limestone or dolostone base. Alvar communities harbor a variety of rare species. For an alvar metapopulation to persist, localized extinction needs to be supplemented with colonization by seeds from other patches. As anthropogenic changes (road building, farming and grazing) increasingly isolate alvar patches, these seeds may need to arrive from more distant alvars. My research tests whether adaptation to local conditions decreases the likelihood that a species will recolonize following a local extinction.
Felipe Nuvoloni (Visiting PhD) research website email
Species turnover through time: non-equilibrium dynamics across metacommunities
s200_felipe.micali_nuvoloniMy research focuses on the ecology, distribution and systematics of mites that occur on rubber trees. During my research exchange at the University of Toronto, I am developing methods to characterize and understand non-equilibrium dynamics in mite metacommunities from several provinces in Brasil.
Current Undergraduate Students
Isabela BorgesKSR undergraduate research award, 4th year project
Lydia WongNSERC undergraduate research award (USRA), 3rd year project
Suhas Srinivasan 4th year project co-supervised by Prof. Nicole Mideo
Zachary Moore 4th year project
Laura Curran2nd year research project
William Wang2nd year research project
Anthony Rajkumar2nd year research project
Duncan Martin2nd year research project
Former Undergraduate Students
Anne CampbellGreenhouse Research Manager
Claire ManglicmotGreenhouse Research Project
Dylan LongertResearch Opportunities Program, 3rd year project
Matthew CoffeyResearch Opportunities Program, 3rd year project
Lucy Genua Centre for Global Change Science (CGCS) Undergraduate Award, 4th year independent research project
Alex Fang
2nd year research project
Munzir Rahman 2nd year research project
Leane Kim 2nd year research project
Joane Plahouras 2nd year research project
Veronica ChongNSERC USRA email
Jui (Rachel) ChangResearch Opportunity Program, 3rd year project
Madeleine DigregorioResearch Opportunity Program, 3rd year project email
James Boyko4th year independent research project current position email
Ilana Travshunsky Research Opportunity Program, 3rd year project email
Enxhi KondiResearch Opportunity Program, 3rd year project
Deirdre Loughnan CGCS Undergraduate award and 4th year independent research project email current position
Christopher Blackford4th year independent project email current position
Jillian Moran4th year independent project
Juliette Martineau2nd year research project
Adam Rego2nd year research project
Stephanie Bland 3rd year independent research project email current position
Teresa TuftsResearch Opportunity Program, 3rd year project
Jessica FinnieResearch Opportunity Program, 3rd year project
Alexandra MushkaCGCS undergraduate award, 2nd year study
Alanna Leale 2nd year research project current position
Alexandra Barrany2nd year research project
Suchinta Arif 4th year independent research project current position
Matt Cumming4th year independent research project email current position
Michael Desilets2nd year research project
Tonny Banh 2nd year research project email