Marion is a marine plant ecophysiologist specializing in the ecology of temperate seagrasses from the southern half of Australia. Her interests include the effects of human pressures on seagrasses (particularly eutrophication), growth and nutrient dynamics, repair of damaged seagrass systems through habitat restoration and natural recovery, clonal growth and seedling recruitment. Marion has had a long interest in linking eco-physiological traits of individual species to their tolerance of a range of environmental factors, particularly the gradient in wave energy and sedimentation on the southwestern Australian coast. Recent work has included effects of salinity and brine on seagrass physiology in relation to discharge of desalination brines into seagrass environments.