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Sci Rep. 2016 Oct 5;6:34645. doi: 10.1038/srep34645.

A comprehensive insight into functional profiles of free-living microbial community responses to a toxic Akashiwo sanguinea bloom.

Author information

1
Research Center of Bioenergy and Bioremediation, College of Resources and Environment, Southwest University, Beibei Dist., Chongqing, China.
2
State Key Laboratory for Marine Environmental Science and Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, School of Life Sciences, Xiamen University, Xiamen 361005, China.
3
College of Life Sciences, Henan Normal University, Xinxiang, China.
4
Institute for Environmental Genomics and Department of Microbiology and Plant Biology, University of Oklahoma, Norman, OK 730722, USA.
5
Earth Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
6
School of Environment, Tsinghua University, Beijing 100084, China.

Abstract

Phytoplankton blooms are a worldwide problem and can greatly affect ecological processes in aquatic systems, but its impacts on the functional potential of microbial communities are limited. In this study, a high-throughput microarray-based technology (GeoChip) was used to profile the functional potential of free-living microbes from the Xiamen Sea Area in response to a 2011 Akashiwo sanguinea bloom. The bloom altered the overall community functional structure. Genes that were significantly (p < 0.05) increased during the bloom included carbon degradation genes and genes involved in nitrogen (N) and/or phosphorus (P) limitation stress. Such significantly changed genes were well explained by chosen environmental factors (COD, nitrite-N, nitrate-N, dissolved inorganic phosphorus, chlorophyll-a and algal density). Overall results suggested that this bloom might enhance the microbial converting of nitrate to N2 and ammonia nitrogen, decrease P removal from seawater, activate the glyoxylate cycle, and reduce infection activity of bacteriophage. This study presents new information on the relationship of algae to other microbes in aquatic systems, and provides new insights into our understanding of ecological impacts of phytoplankton blooms.

PMID:
27703234
PMCID:
PMC5050414
DOI:
10.1038/srep34645
[Indexed for MEDLINE]
Free PMC Article

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