Novel microbes and viruses with roles in biogeochemical cycling and eukaryogenesis in marine systems

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2022-02-07

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Rambo, Ian Maguire

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Abstract

The recent rapid expansion of the microbial tree of life and discovery of novel viruses via metagenomics has exposed the sheer magnitude of the uncultured majority that exists on Earth. Here, I used metagenomic sequencing to reconstruct the genomes of novel microbes and viruses from Caribbean toxic microalgae (Gambierdiscus carolinianus and G. caribaeus), deep-sea hydrothermal vent sediments from Guaymas Basin in the Gulf of California, and mangrove estuaries in South Texas. The results derived from this dissertation revealed new microbial lineages with roles in marine biogeochemical cycling, the first viruses infecting the closest known prokaryotic relatives to eukaryotes, and microbe-virus interactions that can alter carbon and sulfur cycles in estuaries

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