This collection of more than 30 peer-reviewed papers focuses on the diversity and conservation of arthropods, whose species inhabit virtually every recess and plane ¿ and feature in virtually every food web ¿ on the planet. Highlighting issues ranging from large-scale disturbance to local management, from spatial heterogeneity to temporal patterns, these papers reflect exciting new research ¿ and take the reader to some of the most biodiverse corners of the planet.