Coastal areas are increasingly affected by a mixtures of global and local pressures. At the global scale, global chance, including the combination of both warming and acidification is a well-known phenomenon. According to the business-as-usual scenario from IPCC, sea-water temperature will have increased by 3°C, and the pH will have decreased with 0.3 units by the end of the century. Research on the effects of such changes has revealed that both food-web interactions and nutrient cycling will be affected. While warming and pH decrease are primarily effects measured in the water column, there is growing evidence that organisms in sediments, and sedimentary processes are affected as well.