We kicked off the new year in the lab by welcoming Jaivime Evaristo as a new PhD student. Jaivime is joining us from the University of Pennsylvania, where he gained an MS in Applied Geosciences. His Masters thesis was funded by the Luquillo Critical Zone Observatory Program of the NSF and used stable isotopes of water, carbon and nitrogen to test the ecohydrological separation (‘two water worlds’) hypothesis in the humid, tropical environment of northeastern Puerto Rico. Jaivime’s PhD research will build on this as he seeks to characterise the environmental conditions where ecohydrologial separation exists, and also to understand the fundamental physical processes that drive these observations. Welcome, Jaivime!