Prochlorococcus on Verge of Collapse: Warming Oceans Threaten Ocean's Most Abundant Microbe

Breaking News: Ocean's Most Abundant Microbe Near Collapse A decade of research has revealed that Prochlorococcus, the ocean's most abundant microbe, is on the brink of collapse due to warming seas. These tiny cyanobacteria, responsible for 5% of Earth's photosynthesis and a significant portion of the marine food web, are struggling to survive as temperatures rise. Critical Findings A University of Washington study released September 9, 2025, warns that Prochlorococcus populations could decline by up to 50% in tropical waters. The research vessel Thomas G. Thompson collected data from surface waters, where over 75% of the ocean teems with these microbes. Timeline and Details Researchers have been studying Prochlorococcus for a decade, discovering that they thrive within a narrow temperature range (18-25°C). Warming oceans are expected to push them beyond this optimal range, threatening their survival. The study's findings were published in a research paper by the University of Washington. Immediate Impact and Response The collapse of Prochlorococcus populations would have far-reaching consequences for marine ecosystems. "This is a wake-up call for us," said Dr. Kathy Newer, lead researcher on the project. "We need to understand how these microbes respond to climate change and take action to protect them." Background Context Prochlorococcus are single-celled cyanobacteria that play a crucial role in the ocean's food web. They supply nutrients for animals from tiny zooplankton to massive whales. What Happens Next The research team will continue to study Prochlorococcus and their response to climate change. The findings of this study highlight the urgent need for conservation efforts to protect these vital microbes. As Dr. Newer emphasized, "We must act now to safeguard the ocean's delicate balance." *This story is developing. Information compiled from Sciencedaily reporting.*