About

Hi, I’m Ming! I am a postdoc at Sir William Dunn School of Pathology at the University of Oxford, where I study the eco-evolutionary dynamics of the biological world through simulations, statistics, and mathematical modeling. I recently completed my PhD with Stu West before joining Kevin Foster’s group in late 2023. My current work focuses on the diversity-stability relationship in multi-species communities, a crucial question for understanding how ecosystems respond to perturbations such as climate change and antibiotic treatments. I leverage microbial data from the lab to refine and advance new theoretical and predictive frameworks.

I’m also a freelance photographer with ~15 years of experience. You can explore my photographic work here!

Research

My thesis was about the evolution of phenotypic diversity, that is, why do we see variations in individuals of the same species? I looked into various mechanisms that support the selection for variation, described in the following subsections. (Stay tuned for updates on my postdoctoral projects!)

Division of labour (DoL)

One way to get variaiton within a population is through specialisation to various tasks, and make the entire group of individual become more adaptive. Stu’s research group has a series of paper on this topic, including DoL’s formal definition, what population settings favour DoL, the mechanism to divide labour in clonal population, or nonclonal population, and how does the spatial network between individuals affects DoL.

Cheat-cooperator dynamics

Another way to get individual difference within a population is through the coexistence between cheats and cooperators, where the latter produce some public goods while the former exploit them. Two of my past projects investigated this dynamics: (1) If a ‘manipulative cheat’ can co-evolve with cheating trait, then a genetic arms-race could occur. This mechanism can help explains some genetic complication found in empirical populations (paper). (2) If the population goes through periodic bottlenecks and there are some density dependence of the cheats’ growth rate on cooperators’ abundance, then the proportion of cheats could oscillate through time (paper).

Abiotic environmental fluctuations

The third way to maintain variation within a population is through the balencing selection induced by abiotic environmental fluctuations. That is, if strategies are optimal at different times, then the fitness difference between strategies are reduced and coexistence is more likely to happen. Two of my previous projects investigated the effects of fluctuations on different time scales: (1) Long-term variations favour specialists against generalists, while short-term variations promote coexistence of both (paper). (2) Long-term variations facilitate competitive exclusions between specialists, while short-term variations still promote coexistence. By mixing the two, we recovered all possible combinations of previously proposed patterns on variability and diversity (paper).