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Climate change could lead to the dominance of Earth’s oldest, smallest organisms – a troubling development

“Unseen Threat: How Climate Change Could Shift the Balance of Life in the Oceans”

New research has shed light on the crucial role that microscopic organisms, known as prokaryotes, play in the world’s oceans. These tiny creatures make up a significant 30% of life in the oceans and are essential for maintaining the delicate balance of marine ecosystems. However, a recent study conducted by a team of researchers has revealed that this balance is at risk due to climate change.

Prokaryotes, which include bacteria and archaea, are incredibly resilient to the effects of climate change. As a result, they could potentially dominate marine environments in the future. This shift in dominance could have far-reaching consequences, including a reduction in the availability of fish that humans rely on for food and a decrease in the ocean’s capacity to absorb carbon emissions.

These findings are based on computer models that integrated data from numerous scientific surveys conducted across the world’s oceans. The research indicates that for every degree of ocean warming, the biomass of prokaryotes is projected to decline by about 1.5%. This decline is significantly lower than the 3-5% decrease predicted for larger plankton, fish, and mammals, suggesting that prokaryotes are likely to be climate change winners relative to other marine life forms.

Furthermore, the study predicts that with each degree of warming, prokaryotes in the top 200 meters of the oceans could produce an additional 800 million tonnes of carbon per year. This substantial increase in carbon output could hinder the oceans’ ability to absorb human emissions, making it more challenging to achieve global net-zero emissions.

The implications of these findings are significant. Declines in fish populations due to the restructuring of marine food webs by prokaryotes could have a detrimental impact on global food supply, as the oceans are a crucial source of protein for billions of people worldwide.

Moving forward, it is essential for scientists to continue studying prokaryotes and their response to climate change. The research highlights the need to better understand how these microscopic organisms may adapt and evolve in the face of changing environmental conditions. By improving our knowledge of prokaryotes, we can better prepare for the potential consequences of climate change on marine ecosystems.

This study underscores the importance of protecting the delicate balance of marine life and the urgent need to address climate change to safeguard the health of our oceans and the planet as a whole.

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