Multiple outlets report that Australia’s extensive underwater seaweed forests are being harmed by rising ocean temperatures. The Great Southern Reef, described as a system largely built by seaweed rather than coral, supports seaweed habitats across rocky reefs spanning more than 8,000 kilometers around southern Australia. The Conversation and Phys.org both frame the problem as a consequence of marine heat and ocean warming, which can reduce the health and persistence of these “underwater forests.” The Conversation adds that researchers are looking for an “insurance policy” to help protect the ecosystem as losses continue, proposing the use of seaweed biobanks. Under that approach, seaweed genetic material could be stored to support future restoration efforts or recovery, even if local populations decline under continued heat stress. While the articles emphasize that seaweed forests are disappearing as seas get hotter, they also highlight potential conservation and adaptation steps. Together, the reports connect observed warming-driven decline with an emerging strategy aimed at preserving biological resources for later replanting or breeding programs.