What is a major consequence of rising ocean temperatures?

Rising ocean temperatures lead to coral bleaching, which is a significant ecological consequence. Corals are sensitive to temperature changes, and when water temperatures increase, corals can expel the symbiotic algae (zooxanthellae) that live within their tissues. These algae are crucial for corals as they provide up to 90% of the energy corals require through photosynthesis. When the corals expel these algae due to stress from higher temperatures, it results in the loss of color and the vital nutrients they provide, leaving the corals more susceptible to disease and mortality.

Coral reefs are essential marine ecosystems, supporting a diverse range of marine life and protecting coastlines. The phenomenon of coral bleaching can lead to the degradation of these reefs, significantly impacting biodiversity, fisheries, and local economies that rely on healthy coral ecosystems. Thus, the increase in ocean temperatures and its resultant effect on coral bleaching is a pressing environmental concern under the broader impacts of climate change.