Vibriophage vB_VpaM_PG19 was distant from other isolated microviruses in the phylogenetic tree and network analysis and represents a novel microviral genus, named
Vimicrovirus
. Our report describes the genomic and phylogenetic features of vB_VpaM_PG19 and provides a potential antimicrobial candidate for pathogenic
V. parahaemolyticus
.
Oceanospirillum
phage vB_OsaM_PD0307 is the first myovirus found to infect
Oceanospirillaceae
, and it represents a novel abundant viral genus in polar regions. This study provides insights into the genomic, phylogenetic, and ecological characteristics of the new viral genus, namely
Oceanospimyovirus
.
To the best of our knowledge, this study is the first to investigate the responses of viruses to the world’s largest macroalgal green tide. It revealed the spatiotemporal dynamics of the unique viral assemblages and auxiliary metabolic genes (AMGs) following the variation and degradation of
Ulva prolifera
. These findings demonstrate a tight coupling between viral assemblages, and prokaryotic and eukaryotic abundances were influenced by the green tide.
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