New research highlights a significant shift in marine ecosystems due to climate change. Prokaryotes, the oldest and smallest microorganisms on Earth, are expected to become more dominant as ocean temperatures rise. These microorganisms, which include bacteria and archaea, play a crucial role in marine nutrient cycles and food chains. However, their increased presence could disrupt these balances, leading to a decrease in larger marine organisms like fish. This shift could also result in higher carbon emissions from the oceans, complicating global carbon reduction efforts. The decline in fish stocks poses a serious threat to global food security, given that the oceans are a primary protein source for billions of people. Understanding these changes is vital for developing strategies to manage marine resources and mitigate climate change effects.
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