Microbial and chemical dynamics of a toxic dinoflagellate bloom

PeerJ

article

Nastassia V. Patin¹  Emily Brown¹  Gabriella Chebli³  Claire Garfield⁴  Julia Kubanek¹  Frank J. Stewart¹ 

[1] School of Biological Sciences, Georgia Institute of Technology;Center for Microbial Dynamics and Infection, Georgia Institute of Technology;Department of Chemistry, Agnes Scott College;School of Arts and Sciences, State University of New York at Stony Brook;School of Chemistry and Biochemistry, Georgia Institute of Technology;Department of Microbiology and Immunology, Montana State University

关键词: Harmful algal bloom;    Marine microbiome;    Metabolomics;    Microbe-phytoplankton associations;   

DOI  :  10.7717/peerj.9493

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

Harmful Algal Blooms (HABs) exert considerable ecological and economic damage and are becoming increasingly frequent worldwide. However, the biological factors underlying HABs remain uncertain. Relationships between algae and bacteria may contribute to bloom formation, strength, and duration. We investigated the microbial communities and metabolomes associated with a HAB of the toxic dinoflagellate Karenia brevis off the west coast of Florida in June 2018. Microbial communities and intracellular metabolite pools differed based on both bacterial lifestyle and bloom level, suggesting a complex role for blooms in reshaping microbial processes. Network analysis identified K. brevis as an ecological hub in the planktonic ecosystem, with significant connections to diverse microbial taxa. These included four flavobacteria and one sequence variant unidentified past the domain level, suggesting uncharacterized diversity in phytoplankton-associated microbial communities. Additionally, intracellular metabolomic analyses associated high K. brevis levels with higher levels of aromatic compounds and lipids. These findings reveal water column microbial and chemical characteristics with potentially important implications for understanding HAB onset and duration.

【 授权许可】

CC BY