Biodiversity in many of these areas is defined by the meager amount of food reaching the seafloor and over the next 80 plus years, in certain parts of the world, that amount of food will be cut in half, said Dr. Andrew Thurber, an OSU marine ecologist and co-author of the study.  We will see a shift in dominance to smaller organisms.  Some species will thrive, some will migrate to other areas, and many will die.