Spatiotemporal Variation of Microbial Communities in the Ultra-Oligotrophic Eastern Mediterranean Sea

Frontiers in Microbiology

Maya Lalzar¹  Markus Haber²  Laura Gómez-Consarnau³  Dikla Aharonovich⁵  Daniel Sher⁵  Dalit Roth Rosenberg⁵  Laura Steindler⁵  Ilia Burgsdorf⁵  Kumar Saurav⁵  Michael D. Krom⁶  Yoav Lehahn⁷  Regina Lionheart⁷ 

[1] Bioinformatics Service Unit, University of Haifa, Haifa, Israel;Department of Aquatic Microbial Ecology, Institute of Hydrobiology, Biology Centre CAS, České Budějovice, Czechia;Department of Biological Oceanography, Centro de Investigación Científica y de Educación Superior de Ensenada, Ensenada, Mexico;Department of Biological Sciences, University of Southern California, Los Angeles, CA, United States;Department of Marine Biology, Leon H. Charney School of Marine Sciences, University of Haifa, Haifa, Israel;Morris Kahn Marine Research Station, Environmental Geochemistry Lab., Leon H. Charney School of Marine Sciences, University of Haifa, Haifa, Israel;The Dr. Moses Strauss Department of Marine Geosciences, Leon H. Charney School of Marine Sciences, University of Haifa, Haifa, Israel;

关键词: Mediterranean Sea;    SAR11;    transect;    seasonality;    16S rRNA;   

DOI  :  10.3389/fmicb.2022.867694

来源: DOAJ

【 摘 要 】

Marine microbial communities vary seasonally and spatially, but these two factors are rarely addressed together. In this study, the temporal and spatial patterns of the bacterial and archaeal community were studied along a coast-to-offshore transect in the Eastern Mediterranean Sea (EMS) over six cruises, in three seasons of 2 consecutive years. Amplicon sequencing of 16S rRNA genes and transcripts was performed to determine presence and activity, respectively. The ultra-oligotrophic status of the Southeastern Mediterranean Sea was reflected in the microbial community composition dominated by oligotrophic bacterial groups such as SAR11, even at the most coastal station sampled, throughout the year. Seasons significantly affected the microbial communities, explaining more than half of the observed variability. However, the same few taxa dominated the community over the 2-year sampling period, varying only in their degree of dominance. While there was no overall effect of station location on the microbial community, the most coastal site (16 km offshore) differed significantly in community structure and activity from the three further offshore stations in early winter and summer. Our data on the microbial community compositions and their seasonality support previous notions that the EMS behaves like an oceanic gyre.

【 授权许可】

Unknown