My research focuses on understanding patterns and processes that characterize marine ecosystems and, in particular, changes of, and threats to, marine biodiversity, marine resources and ecosystem services. I study community and food-web dynamics linked with human activities (such as fisheries, climate change, eutrophication, and invasive species), and how these translate into changes in ecosystem structure and functioning, and services that humans obtain from the ocean. I develop and apply a variety of ecological analyses such as ecosystem modelling techniques and statistical tools, and I use historical data, fisheries statistics, experimental results and field data sets. My research aims to have an application in conservation and management of marine resources and ecosystems.