John is a marine scientist with a PhD from Otago University and presently is a project leader and Marine Group Manager at NIWA, Christchurch. He has worked across disciplines: plankton ecology, fisheries science, and biological, chemical and physical oceanography. His current research includes process studies on continental shelves,coasts and estuaries, including recent studies of climatic effects on productivity and nutrient cycling in Hauraki Gulf and Nelson Bays regions of New Zealand, and effects of anthropogenic nutrient loading on coastal embayments and smaller estuaries. The time-series aspects of this work are underpinned by biophysical moorings in continental shelf and coastal waters. John has considerable experience in commercial consultancies for coastal environmental impacts assessement, including aquaculture and eutrophication issues.