High-Frequency Variability of Bacterioplankton in Response to Environmental Drivers in Red Sea Coastal Waters
AuthorsAnsari, Mohd Ikram
Calleja, Maria Li
Moran, Xose Anxelu G.
KAUST DepartmentMicrobial oceanography Research Group
Water Desalination and Reuse Research Center (WDRC)
Field & Lab Research Support
Red Sea Research Center (RSRC)
Marine Science Program
Biological and Environmental Science and Engineering (BESE) Division
Permanent link to this recordhttp://hdl.handle.net/10754/676329
MetadataShow full item record
AbstractAutotrophic and heterotrophic bacterioplankton are essential to the biogeochemistry of tropical ecosystems. However, the processes that govern their dynamics are not well known. We provide here a high-frequency assessment of bacterial community dynamics and concurrent environmental factors in Red Sea coastal waters. Weekly sampling of surface samples during a full annual cycle at an enclosed station revealed high variability in ecological conditions, which reflected in changes of major bacterioplankton communities. Temperature varied between 23 and 34°C during the sampling period. Autotrophic (Synechococcus, 1.7–16.2 × 104 cells mL−1) and heterotrophic bacteria (1.6–4.3 × 105 cells mL−1) showed two maxima in abundance in spring and summer, while minima were found in winter and autumn. Heterotrophic cells with high nucleic acid content (HNA) peaked in July, but their contribution to the total cell counts (35–60%) did not show a clear seasonal pattern. Actively respiring cells (CTC+) contributed between 4 and 51% of the total number of heterotrophic bacteria, while live cells (with intact membrane) consistently accounted for over 90%. Sequenced 16S rRNA amplicons revealed a predominance of Proteobacteria in summer and autumn (>40%) and a smaller contribution in winter (21–24%), with members of the Alphaproteobacteria class dominating throughout the year. The contribution of the Flavobacteriaceae family was highest in winter (21%), while the Rhodobacteraceae contribution was lowest (6%). Temperature, chlorophyll-a, and dissolved organic carbon concentration were the environmental variables with the greatest effects on bacterial abundance and diversity patterns
CitationAnsari, M. I., Calleja, M. LI., Silva, L., Viegas, M., Ngugi, D. K., Huete-Stauffer, T. M., & Morán, X. A. G. (2022). High-Frequency Variability of Bacterioplankton in Response to Environmental Drivers in Red Sea Coastal Waters. Frontiers in Microbiology, 13. https://doi.org/10.3389/fmicb.2022.780530
SponsorsSupported by King Abdullah University for Science and Technology (KAUST) through the baseline funding provided to XAGM
We gratefully acknowledge all the personnel involved in the weekly sampling. We thank Najwa Al-Otaibi and Eman I. Sabbagh for their assistance in sample collection.
PublisherFrontiers Media SA
JournalFrontiers in microbiology
Except where otherwise noted, this item's license is described as Archived with thanks to Frontiers in microbiology under a Creative Commons license, details at: https://creativecommons.org/licenses/by/4.0/
- Seasonal variability and vertical distribution of autotrophic and heterotrophic picoplankton in the Central Red Sea.
- Authors: Al-Otaibi N, Huete-Stauffer TM, Calleja ML, Irigoien X, Morán XAG
- Issue date: 2020
- Low Abundances but High Growth Rates of Coastal Heterotrophic Bacteria in the Red Sea.
- Authors: Silva L, Calleja ML, Huete-Stauffer TM, Ivetic S, Ansari MI, Viegas M, Morán XAG
- Issue date: 2018
- A High-Resolution Time Series Reveals Distinct Seasonal Patterns of Planktonic Fungi at a Temperate Coastal Ocean Site (Beaufort, North Carolina, USA).
- Authors: Duan Y, Xie N, Song Z, Ward CS, Yung CM, Hunt DE, Johnson ZI, Wang G
- Issue date: 2018 Nov 1
- Weekly variations of viruses and heterotrophic nanoflagellates and their potential impact on bacterioplankton in shallow waters of the central Red Sea.
- Authors: Sabbagh EI, Huete-Stauffer TM, Calleja MLL, Silva L, Viegas M, Morán XAG
- Issue date: 2020 Apr 1
- Diversity of rare and abundant bacteria in surface waters of the Southern Adriatic Sea.
- Authors: Quero GM, Luna GM
- Issue date: 2014 Oct