Multi‐faceted approaches toward unravelling complex ecological networks

The main theme of this Special Feature is the complexity‐stability relationship and diversity of interaction types. Five articles by leading authors are submitted. Studies on the relationship between complexity and stability have a long history of 40 years. Effect of multiple interaction types on structure and dynamics of an ecological network is a recent important subject to be resolved. In this preface, I briefly review the history of research on complexity‐stability relationship till the idea of diversity of interaction types appears.