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AutorMassana, Ramon
Fecha de publicaciónmar-2017
CitaciónReference Module in Life Sciences (2017)
ResumenThe existence of microbial life suspended in the marine water column has been known for a long time, but only the last few decades have brought an appreciation of the extent of their biological and ecological significance. Most knowledge of marine protists (microbial eukaryotes) has been confined to larger microscopically recognizable taxa, such as microalgae, ciliates, and larger flagellates. In contrast, picoeukaryotes remain largely undescribed because they are a heterogeneous assemblage of small inconspicuous cells (1–3 µm), just slightly larger than marine bacteria. Their small size has implications for metabolic rates and the trophic transfer through microbial food webs. Phototrophic (pigmented) picoeukaryotes account for a significant share of oceanic primary production. Heterotrophic (colorless) picoeukaryotes are the main bacterial grazers and crucial inorganic nutrient remineralizers. Recently, molecular tools have unveiled the large phylogenetic diversity of these assemblages and the existence of major previously unknown groups that appear in all marine samples investigated. Due to their small size, picoeukaryotes are desirable models for genome sequencing projects, particularly to search for the genetic bases of cell miniaturization and ecological success. In short, picoeukaryotes are abundant, ecologically important, and phylogenetically and functionally diverse members of planktonic marine ecosystems
Versión del editorhttps://dx.doi.org/10.1016/B978-0-12-809633-8.13090-0
Identificadoresdoi: 10.1016/B978-0-12-809633-8.13090-0
isbn: 978-0-12-809633-8
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