My research focuses on pivotal attributes of marine ecosystems, notably food-webs and their structure, predator-prey effects including trophic cascades and human impacts on these such as through fishery exploitation. I have made major contributions to (i) analysing the trophic ecology of fish and fisheries beginning with work in the mid-1980s on Coral Sea and later on Mediterranean reefs (ii) exploring ecological effects of marine protected areas starting with projects in the Caribbean in the early 1990s (iii) measuring fishing pressure and climate change effects on coral reef community structure particularly since work in the Pacific and Indian Oceans from the mid-1990s and (iv) the macroecology of the NE of England, dating from our projects in Northumberland and N Yorkshire since the late 2000s.