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Träfflista för sökning "WFRF:(Weissbach Astrid) srt2:(2012)"

Search: WFRF:(Weissbach Astrid) > (2012)

  • Result 1-2 of 2
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1.
  • Weissbach, Astrid, et al. (author)
  • Effect of different salinities on growth and intra- and extracellular toxicity of four strains of the haptophyte Prymnesium parvum
  • 2012
  • In: Aquatic Microbial Ecology. - : Inter-Research Science Center. - 0948-3055 .- 1616-1564. ; 67:2, s. 139-149
  • Journal article (peer-reviewed)abstract
    • The present study investigates the effect of brackish (7 PSU) and marine (26 PSU) salinity on physiological parameters and intra- and extracellular toxicity in 4 strains of Prymnesium parvum Carter. The different P. parvum strains were grown in batch cultures in 2 trials under different experimental conditions to test the development of intra- and extracellular toxicity during growth. The response of P. parvum toxicity to salinity was validated using 2 protocols. Intra-specific variations in growth rate, maximal cell density (yield) and cell morphology were controlled by salinity. Extracellular toxicity was higher at 7 PSU in all strains, but no correlation was found between intra- and extracellular toxicity. The variation of extracellular toxicity in response to salinity was much greater than that of intracellular toxicity, which indicates that P. parvum may be producing a variety of substances contributing to its various types of 'toxicity'.
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2.
  • Weissbach, Astrid, et al. (author)
  • Impact of Alexandrium tamarense allelochemicals on DOM dynamics in an estuarine microbial community
  • 2012
  • In: Harmful Algae. - : Elsevier BV. - 1568-9883 .- 1878-1470. ; 13, s. 58-64
  • Journal article (peer-reviewed)abstract
    • Plankton and dissolved organic carbon (DOC) dynamics in fractionated estuarine microbial communities (<150 μm, <60 μm and <20 μm), incubated with allelopathic (lytic) or non allelopathic (non-lytic) Alexandrium tamarense filtrates were investigated over a period of 48 h. Additionally, the amount of dissolved organic matter (DOM) available for bacterial growth in the treatments was measured via bacterial seawater culture experiments immediately and 6 h after addition of A. tamarense filtrates. The lack of effect on DOC concentrations and plankton community composition in lytic treatments indicated that allelochemicals did not inhibit the growth of the microbial community. Nevertheless, bacterial seawater culture experiments provided evidence that lytic filtrate addition provoked the release of bioavailable DOM from the microbial community. Since DOM was only released from the largest seawater fraction, microorganisms >60 μm were probably most sensitive towards allelochemicals.
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  • Result 1-2 of 2
Type of publication
journal article (2)
Type of content
peer-reviewed (2)
Author/Editor
Legrand, Catherine (2)
Weissbach, Astrid (2)
Bechemin, Christian (1)
Genauzeau, Sylvie (1)
Rudström, Maria (1)
University
Umeå University (2)
Linnaeus University (2)
Language
English (2)
Research subject (UKÄ/SCB)
Natural sciences (2)
Year
2012 (2)Undo refine

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