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Effects of Toxic Microalgae on Bacterial Community Diversity in Coastal Sediment(PDF)

Chinese Journal of Applied & Environmental Biology[ISSN:1006-687X/CN:51-1482/Q]

2020 02
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Effects of Toxic Microalgae on Bacterial Community Diversity in Coastal Sediment
LIU Renyan1 SONG Shanshan2 GONG Changbao1 LI Dongmei1 LIU Lei1 LIANG Yubo1 & SUI Shifeng1
1 National Marine Environmental Monitoring Center, Dalian 116023, China
2 College of Environmental and Chemical Engineering, Dalian Jiaotong U niversity, Dalian 116028, China
toxic microalgae Protoceratium reticulate Prorocentrum lima Alexandrium minutum microbial diversity 16S rRNA high-throughput sequencing

For assessment the effects of toxic microalgae of Harmful Algal Bloom on ecosystem, the composition and diversity of bacterial community in coastal sediments was determined by analyzing the 16S rRNA clone libraries using MiSeq high-throughput sequencing. The effects of toxic dinoflagellates on composition and microbial diversity associated Protoceratium reticulate, Prorocentrum lima, Alexandrium minutum, which were cultured in laboratory, were studied for the first time. The bacterial community diversity of Isochrysis galbana was the highest and Prorocentrum lima was the smallest calculated by the Shannon index, ACE and Chao1. The dominant phylum was Proteobacteria, Bacteroidetes, Firmicutes, Planctomycetes, Chlorofexi, Actinobcteria. The Phylum, Class, Order, Family of the bacterial community all had the lower abundance in Prorocentrum lima. The Phylum, Class, Order, Family, Genus, Species of the bacterial community all had higher relatively abundance in Isochrysis galbana and sea water. There was significant difference in the abundance and diversity of bacterial community between Prorocentrum lima and Isochrysis galbana . These results might suggest that the diversity in the bacterial communities that were sensitive to toxic microalgae and phycotoxins upon exposure, that toxic red tides may play a role in structuring bacterial communities, and that the effects of phycotoxins were selecting for or against specific species. This study may provide data for understanding and assessment the effects of toxic microalgae and phycotoxin on microbial ecosystem, and also provide theoretical and technical support to reveal the harm of HAB on marine ecosystem.




Last Update: 2019-09-04