The rapid response report entitled In Dead Water has for the first time mapped the multiple and combined impacts of pollution; alien infestations; over-exploitation and climate change on the seas and oceans. The worst concentration of cumulative impacts of climate change with existing pressures of over-harvest, bottom trawling, invasive species , coastal development and pollution appear to be concentrated in 10-15 per cent of the oceans concurrent with today’s most important fishing grounds says the report.