Maria Dornelas is a macroecologist, who studies biodiversity change. She combines synthesis of existing data, and novel monitoring technologies to unravel patterns of biodiversity change across scales. At the smallest scale, she focuses on coral reefs, specifically on understanding how reef structures shape biodiversity patterns and promote diversity. At the largest scale, her work spans the entire planet and all kinds of realms and organisms. She uses eco-informatic tools to assemble global biodiversity data, to understand how the diversity of species and ecosystems is changing in the Anthropocene.