GSTDTAP  > 资源环境科学
DOI10.1073/pnas.2020955118
Niche adaptation promoted the evolutionary diversification of tiny ocean predators
Francisco Latorre; Ina M. Deutschmann; Aurélie Labarre; Aleix Obiol; Anders K. Krabberød; Eric Pelletier; Michael E. Sieracki; Corinne Cruaud; Olivier Jaillon; Ramon Massana; Ramiro Logares
2021-06-22
发表期刊Proceedings of the National Academy of Sciences
出版年2021
英文摘要

Unicellular eukaryotic predators play a crucial role in the functioning of the ocean ecosystem by recycling nutrients and energy that are channeled to upper trophic levels. Traditionally, these evolutionarily diverse organisms have been combined into a single functional group (heterotrophic flagellates), overlooking their organismal differences. Here, we investigated four evolutionarily related species belonging to one cosmopolitan group of uncultured marine picoeukaryotic predators: marine stramenopiles (MAST)-4 (species A, B, C, and E). Co-occurrence and distribution analyses in the global surface ocean indicated contrasting patterns in MAST-4A and C, suggesting adaptation to different temperatures. We then investigated whether these spatial distribution patterns were mirrored by MAST-4 genomic content using single-cell genomics. Analyses of 69 single cells recovered 66 to 83% of the MAST-4A/B/C/E genomes, which displayed substantial interspecies divergence. MAST-4 genomes were similar in terms of broad gene functional categories, but they differed in enzymes of ecological relevance, such as glycoside hydrolases (GHs), which are part of the food degradation machinery in MAST-4. Interestingly, MAST-4 species featuring a similar GH composition (A and C) coexcluded each other in the surface global ocean, while species with a different set of GHs (B and C) appeared to be able to coexist, suggesting further niche diversification associated with prey digestion. We propose that differential niche adaptation to temperature and prey type has promoted adaptive evolutionary diversification in MAST-4. We show that minute ocean predators from the same phylogenetic group may have different biogeography and genomic content, which needs to be accounted for to better comprehend marine food webs.

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条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/333999
专题资源环境科学
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Francisco Latorre,Ina M. Deutschmann,Aurélie Labarre,et al. Niche adaptation promoted the evolutionary diversification of tiny ocean predators[J]. Proceedings of the National Academy of Sciences,2021.
APA Francisco Latorre.,Ina M. Deutschmann.,Aurélie Labarre.,Aleix Obiol.,Anders K. Krabberød.,...&Ramiro Logares.(2021).Niche adaptation promoted the evolutionary diversification of tiny ocean predators.Proceedings of the National Academy of Sciences.
MLA Francisco Latorre,et al."Niche adaptation promoted the evolutionary diversification of tiny ocean predators".Proceedings of the National Academy of Sciences (2021).
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