Microbial ecological associations in the surface sediments of Bohai strait
Microbial communities play key roles in the marine ecosystem. Despite a few studies on marine microbial communities in deep straits, ecological associations among microbial communities in the sediments of shallow straits have not been fully investigated. The Bohai Strait in northern China (average depth less than 20 m) separates the Bohai Sea from the Yellow Sea and has organic-rich sediments. In this study, in the summer of 2014, six stations across the strait were selected to explore the taxonomic composition of microbial communities and their ecological associations. The four most abundant classes were Gammaproteobacteria, Deltaproteobacteria, Bacilli and Flavobacteriia. Temperature, total carbon, depth, nitrate, fishery breeding and cold water masses influenced the microbial communities, as suggested by representational difference and composition analyses. Network analysis of microbial associations revealed that key families included Flavobacteriaceae, Pirellulaceae and Piscirickettsiaceae. Our findings suggest that the families with high phylogenetic diversity are key populations in the microbial association network that ensure the stability of microbial ecosystems. Our study contributes to a better understanding of microbial ecology in complex hydrological environments.
Keywordssurface sediment network analysis Bohai Strait evolution of microbial associations
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The manuscript was kindly revised by Dr. Shiliang Anthony Liu from Louisiana State University.
- Bowman J P. 2006. The marine clade of the family flavobacteriaceae: the genera aequorivita, arenibacter, cellulophaga, croceibacter, formosa, gelidibacter, gillisia, maribacter, mesonia, muricauda, polaribacter, psychroflexus, psychroserpens, robiginitalea, salegentibacter, tenacibaculum, ulvibacter, vitellibacter and zobellia. In: Dworkin M, Falkow S, Rosenberg E, Schleifer K H, Stackebrandt E eds. The Prokaryotes: Volume 7: Proteobacteria: Delta, Epsilon Subclass. Springer, New York. p.677–694.Google Scholar
- Caporaso J G, Kuczynski J, Stombaugh J, Bittinger K, Bushman F D, Costello E K, Fierer N, Peña A G, Goodrich J K, Gordon J I, Huttley G A, Kelley S T, Knights D, Koenig J E, Ley R E, Lozupone C A, McDonald D, Muegge B D, Pirrung M, Reeder J, Sevinsky J R, Turnbaugh P J, Walters W A, Widmann J, Yatsunenko T, Zaneveld J, Knights R, Koenig J E, Ley R E, Lozupone C A, McDonald D, Muegge B D, Pirrung M, Reeder J, Sevinsky J R, Turnbaugh P J, Walters W A, Widmann J, Yatsunenko T, Zaneveld J, Knight R. 2010. QIIME allows analysis of high-throughput community sequencing data. Nat. Methods, 7(5): 335–336.CrossRefGoogle Scholar
- Elsabé M J, Brüchert V, Fuchs B M. 2012. Vertical shifts in the microbial community structure of organic-rich Namibian shelf sediments. African Journal of Microbiology Research, 6(17): 3887–3897.Google Scholar
- Langille M G I, Zaneveld J, Caporaso J G, McDonald D, Knights D, Reyes J A, Clemente J C, Burkepile D E, Vega Thurber R L, Knight R, Beiko R G, Huttenhower C. 2013. Predictive functional profiling of microbial communities using 16S rRNA marker gene sequences. Nat. Biotech., 31(9): 814–821.CrossRefGoogle Scholar
- Lupatini M, Suleiman A K A, Jacques R J S, Antoniolli Z I, de Siqueira Ferreira A, Kuramae E E, Roesch L F W. 2014. Network topology reveals high connectance levels and few key microbial genera within soils. Front. Env ron. Sci., 2: 10.Google Scholar
- Marshall S H, Gómez F A, Klose K E. 2014. The Genus Piscirickettsia. In: Rosenberg E, DeLong E F, Lory S, Stackebrandt E, Thompson F eds. The Prokaryotes: Gammaproteobacteria. Springer, Berlin Heidelberg. p.565–573.Google Scholar
- Mu F H, Somerfield P J, Warwick R M, Zhang Z N. 2002. Large-scale spatial patterns in the community structure of benthic harpacticoid copepods in the Bohai Sea, China. The Raffles Bulletin of Zoology, 50(1): 17–26.Google Scholar
- Wu H B, Guo Y T, Wang G H, Dai S K, Li X. 2011. Composition of bacterial communities in deep-sea sediments from the South China Sea, the Andaman Sea and the Indian Ocean. African Journal of Microbiology Research, 5(29): 5273–5283.Google Scholar