Luana C Vargas, Laiza C Faria, Lucas T Pereira, Camila N Signori
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引用次数: 0
Abstract
The Southern Ocean influences the planet's biogeochemical cycles. Marine microorganisms are important in this scenario, being the main biological agents in the cycling of many elements. The Archaea domain is widely distributed in the oceans, and its presence in Antarctica is acknowledged. In this context, this work aimed to analyze the diversity and distribution of archaea according to environmental parameters in the waters surrounding the north of the Antarctic Peninsula. For environmental characterization studies, surface and bottom data were used for the ten monitoring stations of expeditions that took place in the summer of 2014 and 2015. The sequencing of the 16S rRNA gene was performed on the Illumina HiSeq platform, using the SILVA v138 database. The results revealed the presence of three main water bodies: Antarctic Surface Water, Shelf Waters, and modified Circumpolar Deep Water. Deep waters had higher diversity than surface waters, and the dominant groups were Nitrososphaeria and MGII. In the study region, the main factor responsible for the differences in the ecosystems was the presence of distinct water masses and the stratification of the water column. We argue that it is essential to consider water mass dynamics to study the microbial landscape of the Southern Ocean.
期刊介绍:
The Brazilian Academy of Sciences (BAS) publishes its journal, Annals of the Brazilian Academy of Sciences (AABC, in its Brazilianportuguese acronym ), every 3 months, being the oldest journal in Brazil with conkinuous distribukion, daking back to 1929. This scienkihic journal aims to publish the advances in scienkihic research from both Brazilian and foreigner scienkists, who work in the main research centers in the whole world, always looking for excellence.
Essenkially a mulkidisciplinary journal, the AABC cover, with both reviews and original researches, the diverse areas represented in the Academy, such as Biology, Physics, Biomedical Sciences, Chemistry, Agrarian Sciences, Engineering, Mathemakics, Social, Health and Earth Sciences.