quantified the role of neutral processes by simulating division, mutation, and death of some 100,000 individual marine bacteria cells with full genomes in a global surface ocean circulation model. Over the past several decades, ecologists have come to understand that both natural selection and neutral evolution-that variation within and between species is caused by genetic drift and random mutations-play a role in the biogeographic patterns of ocean microbes. Hellweger, Population Dynamics of Escherichia coli in Surface Water, JAWRA Journal of the American Water Resources Association, 10.1111/j., 47, 3, (611-619), (2011). "Certain species of microbes may not thrive under new temperatures in certain provinces." Vanni Bucci, Marin Vuli, Xiaodan Ruan, Ferdi L. "You may not see microbes adapt to climate change as rapidly if ocean microbes were completely mixed and they were everywhere," Hellweger posited. What's more, the findings shed light on how ocean microbes may respond to global climate change. "Because provinces are not well-mixed, the differences can continue to grow." The findings, Hellweger says, shed light on how ocean microbes may respond to global climate change. "Microbes differ between provinces because of neutral evolution and dispersal limitation," said Hellweger, whose ongoing research on this topic is supported by grants from the National Science Foundation and the National Oceanic and Atmospheric Administration. Please send your written application with the reference number and the usual documents (in particular letter of motivation, CV/Resume, course work transcripts (BS, MS, PhD), 2 sample publications (eg articles, thesis). Ferdi Hellweger, Northeastern University (IMAGE) Caption. On the contrary, the researchers found that microbes evolve faster than the ocean circulation can disperse them, leading to substantial-and dynamic- biogeographic patterns in their surface ocean population. Their results flew in the face of the long held notion that microbes are infinitely mobile-that the same cells could be found anywhere in the world's oceans, unhindered by geographic boundaries. By Brooks Hays Boston's Charles River recently suffered a significant outbreak of cyanobacteria. The paper-titled "Biogeographic patterns in ocean microbes emerge in a neutral agent-based model"-was co-authored by Ferdi Hellweger, a microbial ecology expert and an associate professor of civil and environmental engineering his doctoral student Neil Fredrick, PhD'15 and oceanographer Erik van Sebille of Australia's University of New South Wales. 'These blooms are threatening our vision of a swimmable Charles,' said researcher Ferdi Hellweger. Their findings were published Thursday in the journal Science. Models predict planned phosphorus load reduction will make Lake Erie more toxic (in review). Two Northeastern University researchers and their international colleagues have created an advanced model aimed at exploring the role of neutral evolution in the biogeographic distribution of ocean microbes. Image: The findings, Hellweger says, shed light on how ocean microbes may respond to global climate change.
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