A groundbreaking discovery reveals the hidden power of viruses in our oceans. Viruses, often associated with illness, are now shown to play a vital role in ocean health.
Researchers from the University of Tennessee and the University of Maryland have uncovered a fascinating relationship between viruses and blue-green algae (cyanobacteria). Their study, published in Nature Communications, demonstrates that viral infections in these algae can significantly impact the ocean's ecosystem and oxygen levels.
But here's where it gets intriguing: the research suggests that these viral infections stimulate productivity. Viruses, it seems, can be both a force of destruction and creation.
Led by Professor Steven Wilhelm, the team conducted RNA sequencing surveys in the Bermuda Atlantic Time-series Study, an area where data has been collected for almost four decades. They found that when a specific cyanobacteria, Prochlorococcus, is infected by viruses, it releases nutrients that boost microbial growth, resulting in increased oxygen levels at considerable depths.
This discovery connects two crucial oceanographic processes: the 'viral shunt,' a concept introduced by Wilhelm and Curtis Suttle in 1999, and the microbial loop in the ocean's food web. By examining cellular and viral activity over day-night cycles, the researchers identified the far-reaching effects of viral infections on the ecosystem.
Professor Joshua S. Weitz from the University of Maryland elaborates, "Viral infection enhances the recycling of carbon and nutrients, driving productivity and offering insights into historical trends." This research challenges the conventional view of viruses, revealing their dual role in ocean life.
The study, funded by the National Science Foundation and supported by the Simons Foundation, was led by Wilhelm and Weitz, with contributions from multiple universities. The lead author, Naomi Gilbert, and other researchers from UT and collaborating institutions, played a significant role in this interdisciplinary effort.
And this is the part most people miss: viruses, despite their microscopic size, can have a massive impact on our planet's health. The Conversation will feature further insights from Wilhelm and Weitz, offering a deeper understanding of this controversial yet essential aspect of oceanography.
