Trans-Biome Invasions of Femtoplankton
V. S. MUHANOV1, O. A. RYLKOVA1, E. G. SAKHON1, T. V. BUTINA2, O. I. BELYKH2
1A. O. Kovalevsky Institute of Marine Biological Research, RAS, 299011, Sevastopol, Nakhimova ave., 2
2Limnological Institute, SB RAS, 664033, Irkutsk, Ulan-Batorskaya str., 3
Keywords: фемтопланктон, виропланктон, ультрамикробактерии, фильтрующиеся бактерии, SAR11, LD12, филогенетическое разнообразие, биом, соленость, осморегуляция, femtoplankton, virioplankton, ultramicrobacteria, filterable bacteria, phylogenetic diversity, biome, salinity, osmoregulation
Abstract
To shed light on the problem of trans-biome invasions by microbes, the results of ecological and phylogenetic studies of femtoplankton, the smallest size fraction of plankton formed by viruses and ultramicrobacteria (UMB), were overviewed. Phylogenetic lineages of viruses and UMB were shown to be associated with particular biomes, thus, indicating infrequent trans-biome transitions in the microbial world. Consideration of an alternative hypothesis of widespread cross-colonizations is believed to require a deeper analysis of the factors that form the barrier between biomes and are responsible for the adaptation of microorganisms to different environments.
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