Prof. Peñuelas is one of the most influential ecologists working today, and is a highly cited scientist in ecology/environment, in plant and animal sciences, agricultural sciences, geosciences and in all science fields of the ISI essential science indicators. His fields of specialization are: global ecology, global change, climate change, pollution, atmosphere-biosphere, Biogenic Volatile Organic Compounds emissions, remote sensing, plant ecophysiology, functioning and structure of terrestrial plants and ecosystems, chemical ecology, ecometabolomics, microbial ecology, macroecology, evolutionary ecology, biogeochemistry with special focus on phosphorus, environmental sustainability, food security and global health. At CREAF, he leads the Global Ecology Unit.