José R. Portillo

This paper shows that coupling species' demography and interactions changes the structural stability of ecological communities in non-linear ways.

This paper introduces cooperation into structural stability theory to show that cooperation promotes biodiversity through coexistence, intertwined biodiversity, and multistability.

The paper develops a framework to analyze cycles in ecological networks by decomposing interaction matrices and applies it to plant communities, finding few cycles due to self-limiting effects and competitive asymmetries.