What outcome can result from increased ocean temperatures?

Increased ocean temperatures are strongly linked to the occurrence of bleaching events in coral reefs. Coral bleaching occurs when corals, under stress from elevated temperatures, expel the symbiotic algae (zooxanthellae) that provide them with essential nutrients and their vibrant colors. This loss of algae not only affects the color of the coral, turning it white, but it also compromises the coral’s health and survival since these algae play a crucial role in the coral's energy production through photosynthesis. If the stress from the high temperatures persists, it can lead to widespread coral mortality, significantly impacting reef ecosystems.

Some other options may seem plausible, such as the idea that increased temperatures could enhance growth or biodiversity; however, the primary concern and notable outcome from such stress is the alarming rise in bleaching events which jeopardize coral health and the overall ecosystem. Thus, understanding the direct impacts of rising ocean temperatures highlights the urgent need for measures aimed at regulating these temperature increases to protect coral reefs.