Professor Diana Walker led seagrass research in western Australia for over 25 years (1982-2009), making significant contributions to science in seagrass restoration and their responses to light, nutrients and human activities such as dredging. Di originally hailed from Northern Ireland but graduated from the Universities of Liverpool and York and moved to the University of Western Australia in 1982, eventually becoming Associate Dean of Marine Science. Di was instrumental in some of the first seagrass and macrophyte surveys in WA including the Abrolhos, Ningaloo Reef and Shark Bay. She has co-edited books which describe marine flora and fauna of Albany, Dampier, and Rottnest Island and has published widely in the international literature on the ecology of coastal marine plant communities. As evidence of her international reputation, Di has attracted many other researchers to work on WA seagrasses, convening international workshops and leading large-scale surveys. Di is a past President of both ASPAB (1997 to 2000) and the Royal Society of WA, Chair of the Shark Bay World Heritage Area Scientific Advisory Committee, and an Inaugural Member of the WA Marine Parks and Reserves Authority.