Artículos de revistas
Bacterial community structure in a sympagic habitat expanding with global warming: brackish ice brine at 85–90 °N
Fecha
2019Registro en:
ISME Journal, Volumen 13, Issue 2, 2019, Pages 316-333
17517370
17517362
10.1038/s41396-018-0268-9
Autor
Fernández-Gómez, Beatriz
Díez, Beatriz
Polz, Martin F.
Arroyo, José Ignacio
Alfaro, Fernando D.
Marchandon, Germán
Sanhueza, Cynthia
Farías, Laura
Trefault, Nicole
Marquet, Pablo A.
Molina-Montenegro, Marco A.
Sylvander, Peter
Snoeijs-Leijonmalm, Pauline
Institución
Resumen
© 2018, International Society for Microbial Ecology.Larger volumes of sea ice have been thawing in the Central Arctic Ocean (CAO) during the last decades than during the past 800,000 years. Brackish brine (fed by meltwater inside the ice) is an expanding sympagic habitat in summer all over the CAO. We report for the first time the structure of bacterial communities in this brine. They are composed of psychrophilic extremophiles, many of them related to phylotypes known from Arctic and Antarctic regions. Community structure displayed strong habitat segregation between brackish ice brine (IB; salinity 2.4–9.6) and immediate sub-ice seawater (SW; salinity 33.3–34.9), expressed at all taxonomic levels (class to genus), by dominant phylotypes as well as by the rare biosphere, and with specialists dominating IB and generalists SW. The dominant phylotypes in IB were related to Candidatus Aquiluna and Flavobacterium, those in SW to Balneatrix and ZD0405, and those shared between the habitats t