What effects do some scientists believe climate change will have on the great barrier reef? a. they believe that cooling ocean temperatures could cause the reef to freeze, creating an ice shelf similar to those in antarctica. b. they believe that cooling ocean temperatures will damage the reef’s delicate ecosystem, killing most of the current plant and animal life and replacing it with new cool-weather species. c. they believe that warming ocean temperatures could lead to increased biodiversity in the reef. d. they believe that warming ocean temperatures could lead to an overgrowth of plankton and algae, putting the reef’s survival at risk.