The main part of my research activities is focused on biodiversity, its measurement, patterns and drivers, such as top predators and different types of human impact and climate change. The research done involves the use of large-scale and/or long-term datasets already collected in scientific surveys or environmental monitoring surveys. I have studied marine biodiversity patterns in different parts of the world in shallow waters, on the continental shelf and in the deep sea using data on benthos and fish communities. The work implies a large number of collaborations with scientists from Europe, New Zealand, Canada, Russia and China. With regard to the measurement of biodiversity, I have focused on beta diversity, patterns of rare and common species and, in general, on the use of multivariate analyses.