Catriona L. Hurd is an Associate Professor in the Institute for Marine and Antarctic Studies, University of Tasmania, Australia. She is known for her work on water motion, photosynthetic and nutrient physiology along environmental gradients in the intertidal and subtidal and, most recently, on ocean acidification. Paul J. Harrison is Professor Emeritus in the Department of Earth and Ocean Sciences at the University of British Columbia, Vancouver, Canada. He is an expert in nutrient ecophysiology of seaweeds and phytoplankton, with over 40 years of research experience. Kai Bischof is Head of the Department of Marine Botany at the University of Bremen, Germany. His research covers all aspects of seaweed ecophysiology, with a focus on the field of light acclimation and oxidative stress management. Christopher S. Lobban is Professor of Biology in the Division of Natural Sciences at the University of Guam, Mangilao, USA. He has over 40 years of experience working with marine algae, including 25 years on coral reefs in Guam. He is currently investigating biodiversity of coral reef diatoms.