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Increasing Microcystis cell density enhances microcystin synthesis : a mesocosm study

Increasing Microcystis cell density enhances microcystin synthesis : a mesocosm study

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WOOD, 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. 2(1), pp. 17-22. ISSN 2044-2041. eISSN 2044-205X. Available under: doi: 10.5268/IW-2.1.424

@article{Wood2012-02-01Incre-48526, title={Increasing Microcystis cell density enhances microcystin synthesis : a mesocosm study}, year={2012}, doi={10.5268/IW-2.1.424}, 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.} }

eng Dietrich, Daniel R. Wood, Susanna A. 2020-02-05T12:45:54Z Cary, S. Craig terms-of-use Hamilton, David P. Cary, S. Craig Wood, Susanna A. Increasing Microcystis cell density enhances microcystin synthesis : a mesocosm study Dietrich, Daniel R. 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<sup>−1</sup>, 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<sup>−1</sup>, respectively. Both additions resulted in marked increases in microcystin quotas from 0.1 pg cell<sup>−1</sup> to 0.60 and 1.38 pg cell<sup>−1</sup>, 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. Hamilton, David P. 2012-02-01 2020-02-05T12:45:54Z

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