affected, demonstrating that oceans have some resilience left if we can keep to 2019 temperatures, the researchers say.
The researchers looked for effects on the number and types of fish in the year following a marine heat wave. To their surprise, they found that marine heat waves in general could not be distinguished from natural variability of ocean life. Although declines in biomass did occur after some marine heat waves, the researchers say these cases were the exception, not the rule."Marine populations vary enormously in nature as it is, and in some places, fish populations increased after a heat wave, while in others, they declined. We found no overall, consistent effects, across populations which suggests that the impacts of marine heat waves vary substantially depending on local conditions," says Dr.