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On the control of HAB species using low biosurfactant concentrations

Gustafsson, Susanne LU ; Hultberg, Malin; Figueroa, Rosa LU and Rengefors, Karin LU (2009) In Harmful Algae 8. p.857-863
Abstract
Biosurfactants have been suggested as a method to control harmful algal blooms (HABs), but warrant further and more in-depth investigation. Here we have investigated the algicidal effect of a biosurfactant produced by the bacterium Pseudomonas aeruginosa on five diverse marine and freshwater HAB species that have not been tested previously. These include Alexandrium minutum (Dinophycaee), Karenia brevis (Dinophyceae), Pseudonitzschia sp. (Bacillariophyceae), in marine ecosystems, and Gonyostomum semen (Raphidophyceae) and Microcystis aeruginosa (Cyanophyecae) in freshwater. We examined not only lethal but also sub-lethal effects of the biosurfactant. In addition, the effect of the biosurfactant on Daphnia was tested. Our conclusions were... (More)
Biosurfactants have been suggested as a method to control harmful algal blooms (HABs), but warrant further and more in-depth investigation. Here we have investigated the algicidal effect of a biosurfactant produced by the bacterium Pseudomonas aeruginosa on five diverse marine and freshwater HAB species that have not been tested previously. These include Alexandrium minutum (Dinophycaee), Karenia brevis (Dinophyceae), Pseudonitzschia sp. (Bacillariophyceae), in marine ecosystems, and Gonyostomum semen (Raphidophyceae) and Microcystis aeruginosa (Cyanophyecae) in freshwater. We examined not only lethal but also sub-lethal effects of the biosurfactant. In addition, the effect of the biosurfactant on Daphnia was tested. Our conclusions were that very low biosurfactant concentrations (5 μg mL−1) decreased both the photosynthesis efficiency and the cell viability and that higher concentrations (50 μg mL−1) had lethal effects in four of the five HAB species tested. The low concentrations employed in this study and the diversity of HAB genera tested suggest that biosurfactants may be used to either control initial algal blooms without causing negative side effect to the ecosystem, or to provoke lethal effects when necessary. (Less)
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Contribution to journal
publication status
published
subject
keywords
Alexandrium minutum, Gonyostomum semen, Harmful algal blooms, Karenia brevis, Microcystis aeruginosa, Pseudonitzschia, Rhamnolipids
in
Harmful Algae
volume
8
pages
857 - 863
publisher
Elsevier
external identifiers
  • wos:000270494600005
  • scopus:69249240234
ISSN
1878-1470
DOI
10.1016/j.hal.2009.04.002
language
English
LU publication?
yes
id
3a4a121a-d98d-487a-a36c-ce60efd1febe (old id 1445393)
date added to LUP
2009-08-10 13:51:47
date last changed
2017-11-19 03:38:49
@article{3a4a121a-d98d-487a-a36c-ce60efd1febe,
  abstract     = {Biosurfactants have been suggested as a method to control harmful algal blooms (HABs), but warrant further and more in-depth investigation. Here we have investigated the algicidal effect of a biosurfactant produced by the bacterium Pseudomonas aeruginosa on five diverse marine and freshwater HAB species that have not been tested previously. These include Alexandrium minutum (Dinophycaee), Karenia brevis (Dinophyceae), Pseudonitzschia sp. (Bacillariophyceae), in marine ecosystems, and Gonyostomum semen (Raphidophyceae) and Microcystis aeruginosa (Cyanophyecae) in freshwater. We examined not only lethal but also sub-lethal effects of the biosurfactant. In addition, the effect of the biosurfactant on Daphnia was tested. Our conclusions were that very low biosurfactant concentrations (5 μg mL−1) decreased both the photosynthesis efficiency and the cell viability and that higher concentrations (50 μg mL−1) had lethal effects in four of the five HAB species tested. The low concentrations employed in this study and the diversity of HAB genera tested suggest that biosurfactants may be used to either control initial algal blooms without causing negative side effect to the ecosystem, or to provoke lethal effects when necessary.},
  author       = {Gustafsson, Susanne and Hultberg, Malin and Figueroa, Rosa and Rengefors, Karin},
  issn         = {1878-1470},
  keyword      = {Alexandrium minutum,Gonyostomum semen,Harmful algal blooms,Karenia brevis,Microcystis aeruginosa,Pseudonitzschia,Rhamnolipids},
  language     = {eng},
  pages        = {857--863},
  publisher    = {Elsevier},
  series       = {Harmful Algae},
  title        = {On the control of HAB species using low biosurfactant concentrations},
  url          = {http://dx.doi.org/10.1016/j.hal.2009.04.002},
  volume       = {8},
  year         = {2009},
}