Increasing Microcystis cell density enhances microcystin synthesis : a mesocosm study

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2012
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Wood, Susanna A.
Cary, S. Craig
Hamilton, David P.
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Inland Waters. Taylor & Francis. 2012, 2(1), pp. 17-22. ISSN 2044-2041. eISSN 2044-205X. Available under: doi: 10.5268/IW-2.1.424
Zusammenfassung

An experimental protocol using mesocosms was established to study the effect of Microcystis sp. cell abundance on microcystin production. The mesocosms (55 L) were set up in a shallow eutrophic lake and received either no (control), low (to simulate a moderate surface accumulation), or high (to simulate a dense surface scum) concentrations of Microcystis sp. cells collected from the lake water adjacent to the mesocosms. In the low- and high-cell addition mesocosms (2 replicates of each), the initial addition of Microcystis sp. cells doubled the starting cell abundance from 500 000 to 1 000 000 cells mL−1, but there was no detectable effect on microcystin quotas. Two further cell additions were made to the high-cell addition mesocosms after 60 and 120 min, increasing densities to 2 900 000 and 7 000 000 cells mL−1, respectively. Both additions resulted in marked increases in microcystin quotas from 0.1 pg cell−1 to 0.60 and 1.38 pg cell−1, respectively, over the 240 min period. Extracellular microcystins accounted for <12% of the total microcystin load throughout the whole experiment. The results of this study indicate a relationship between Microcystis cell abundance and/or mutually correlated environmental parameters and microcystin synthesis.

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Fachgebiet (DDC)
570 Biowissenschaften, Biologie
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cell abundance, cyanobacteria, cyanotoxins
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ISO 690WOOD, Susanna A., Daniel R. DIETRICH, S. Craig CARY, David P. HAMILTON, 2012. Increasing Microcystis cell density enhances microcystin synthesis : a mesocosm study. In: Inland Waters. Taylor & Francis. 2012, 2(1), pp. 17-22. ISSN 2044-2041. eISSN 2044-205X. Available under: doi: 10.5268/IW-2.1.424
BibTex
@article{Wood2012-02-01Incre-48526,
  year={2012},
  doi={10.5268/IW-2.1.424},
  title={Increasing Microcystis cell density enhances microcystin synthesis : a mesocosm study},
  number={1},
  volume={2},
  issn={2044-2041},
  journal={Inland Waters},
  pages={17--22},
  author={Wood, Susanna A. and Dietrich, Daniel R. and Cary, S. Craig and Hamilton, David P.}
}
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