
Rising Ocean Heat Waves Threaten Arctic Marine Mammals with Higher Mortality, Lower Reproduction: Study
A new study has warned that Arctic and Subarctic marine mammals are facing rising mortality rates and declining reproductive success due to the increasing frequency and intensity of marine heat waves (MHWs). These extreme ocean temperature events, which can last for days or even years, pose a serious threat to species such as cetaceans, sea lions, seals, and walruses.
The Arctic Ocean is projected to become a future hotspot for MHWs, with sea surface temperatures surpassing historical norms for extended periods. Scientists define an MHW as a temperature anomaly that exceeds the local 90th percentile threshold for at least five consecutive days. These heat waves have already been linked to widespread disruptions in Arctic and Subarctic ecosystems.
The study, published in Frontiers in ...