Work in the global biodiversity change and conservation theme uses large datasets to answer applied questions at large - often global - scales. Currently, we have three main projects within this theme: (i) trying to understand, and predict, the impacts of invasive species on ecological communities, (ii) using tools from mathematics to transform our ability to monitor the health of communities, and (iii) using large datasets of population trends to understand the patterns and processes of global biodiversity change. We are also involved in side projects to assess how well evidence of the effectiveness of conservation interventions is conserved across space, and to explore how planetary boundaries interact to affect sustainable food production. Other past side projects in this theme include trying to understand the impacts of protected areas on species populations worldwide; assessing the global impacts of land-use change on biodiversity; exploring the evidence for worldwide insect declines; and assessing the costs and benefits of high-yield farming.