Inverted Trophic Pyramids & Top-Heavy Communities: new research

New research I worked on with UC Santa Barbara’s Douglas McCauley and several colleagues is published in Ecology Letters and is now available online. On the prevalence and dynamics of inverted trophic pyramids and otherwise top-heavy communities McCauley, D.J., G. Gellner, N.D. Martinez, R.J. Williams, S.A. Sandin, F. Micheli, P.J. Mumby, and K.S. McCann Abstract Classically, biomass partitioning…

A Stochastic Theory of Species Interactions

My research with Kevin McCann (U of Guelph) and Alan Hastings (UC Davis) on a stochastic theory of species interactions has been published in Theoretical Ecology and is available online. The Duality of Stability: Towards a Stochastic Theory of Species Interactions G. Gellner, K.S. McCann, A. Hastings Abstract Understanding the dynamics of ecological systems using stability…

Consistent Interaction Role in Food Webs

Very excited that my research has been published in Nature Communications: 7, 11180 (12 April 2016) Consistent role of weak and strong interactions in high- and low-diversity trophic food webs Gellner, G. and KS McCann Abstract The growing realization of a looming biodiversity crisis has inspired considerable progress in the quest to link biodiversity, structure…

Food Webs & Fisheries

Exciting news: our paper “Food webs and the sustainability of indiscriminate fisheries” in the Canadian Journal of Fisheries and Aquatic Sciences is published and available online.

Grasslands Diversity Loss

A project I worked on with Andrew MacDougall, based at the University of Guelph, was the cover article published in Nature: 494, 86-89 (February 2013). Diversity loss with persistent human disturbance increases vulnerability to ecosystem collapse A.S. MacDougall, K.S. McCann, G. Gellner, R. Turkington Abstract Long-term and persistent human disturbances have simultaneously altered the stability and diversity…

Reconciling the Omnivory-Stability Debate

Excited that my research has been published in The American Naturalist. (vol.179, no.1), January 2012. Reconciling the Omnivory-Stability Debate Gabriel Gellner and Kevin McCann Abstract Despite attempts at reconciliation, the role of omnivory in food web stability remains unclear. Here we develop a novel community matrix approach that is analogous to the bifurcation method of modular food web…

Food Chains and Food Web Modules

We have written a brief and accessible introduction to Food Chains and Food Web Modules, which discusses typical ways in which ecologists simplify and deconstruct food webs. We briefly review modular theory, focusing on two ubiquitous modules – the food chain and the diamond module – before discussing how results from modular theory contribute to…

Elephant’s guide to sex

BBC Two and Discovery Channel have featured our research in an episode of their award-winning science documentary television series Horizon.

Stability of Diverse Food Webs

“Structural asymmetry and the stability of diverse food webs” – a Nature paper I co-authored with Neil Rooney, Kevin McCann and John C. Moore in 2006 has over 400 citations.