Lavenia Ratnarajah, United States, Ingrid Obernosterer, Université Pierre et Marie Curie-Paris 6, Banyuls-sur-mer, France, Philip W. Boyd, University of Tasmania, Institute for Marine and Antarctic Studies, Antarctic Climate Ecosystems Cooperative Research Centre, Hobart, Australia, Stephane Blain, Marion Fourquez, University of Tasmania, Institute for Marine and Antarctic Studies (IMAS), Hobart, Australia and Alessandro Tagliabue, University of Liverpool, Liverpool, United Kingdom