

FOLLOWUS
1.College of Life Sciences, Qufu Normal University, Qufu, 273165, China
2.Key Laboratory of Marine Biological Resources and Ecology, Liaoning Ocean and Fisheries Science Research Institute, Dalian, 116023, China
Peike GAO, gpkyll-001@163.com
Renjun WANG, wangrenjun2002@126.com
Published:2022-03
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Li SUN, Peike GAO, Yu LI, et al. Microbial community coexisting with harmful alga
Li SUN, Peike GAO, Yu LI, et al. Microbial community coexisting with harmful alga
Algicidal bacteria have been frequently isolated from algal blooming areas. However
knowledge regarding the microbial communities coexisting with microalgae and their potential application in preventing harmful algal blooms (HABs) is limited. In this study
we investigated the composition of the microbial community coexisting with harmful alga
Karenia mikimotoi
and its responses to algal control via nutrient stimulation or by adding algicidal strain in microcosms. The microorganisms inhabiting the
K. mikimotoi
culture consisted of 24 identified phyla
including dominant Proteobacteria (relative abundance 76.24%±7.28%) and Bacteroidetes (22.67%±8.32%). Rhodobacteraceae
Phaeodactylibacter
and
Maritimibacter
predominated during the algal cultivation. Both the added nutrient and fermentation broth of algicidal strain
Pseudoalteromonas
QF1 caused a massive death of
K. mikimotoi
and substantial changes in the coexisting microbial community
in which Rhodobacteraceae and
Phaeodactylibacter
significantly decreased
while
Halomonas
and
Alteromonas
increased. Core operational taxonomic units (OTUs) analysis indicated that 13 OTUs belonging to Rhodobacteraceae
Maritimibacter
Marivita
Nisaea
Phaeodactylibacter
Citreicella
Halomonas
Alteromonas
Marinobacter
Muricauda
and
Pseudoalteromonas
dominated the changes of the microbial communities observed in the
K. mikimotoi
culture with or without treatments. Collectively
this study indicated that microbial community inhabiting
K. mikimotoi
culture includes potential algicidal bacteria
and improves our knowledge about microbial community succession during biocontrol of
K. mikimotoi
via nutrient stimulation or by adding isolated algicidal strains.
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