The dimensional-age structure of a laboratory population of Scenedesmus quadricauda (Turp.) Breb. in the presence of imazalyl sulfate

Prokhotskaya, Valeria Yu.; Veselova, T. V.; Veselovsky, Vladimir A.; Dmitrieva, A. G.; Artyukhova, V. I.

doi:10.1615/interjalgae.v5.i1.90

Cited by 2 publications

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“…This effect was probably induced by the high TA concentrations applied in single additions to the algae as compared to the continuous supply of allelochemicals in low concentrations in the lake and aquaria experiments. A potential explanation is increased cell divisions of premature cells resulting in small cells, an effect that has been observed for the green alga Scenedesmus quadricauda after application of lethal toxicant concentrations (Prokhotskaya et al. 2003).…”

Section: Water Quality Parameters At the End Of The Experiments In Lmentioning

confidence: 99%

COMPARISON OF METHODS TO DETECT ALLELOPATHIC EFFECTS OF SUBMERGED MACROPHYTES ON GREEN ALGAE¹

Hilt¹,

Beutler²,

Bauer³

2011

Journal of Phycology

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Detecting allelopathic inhibition of phytoplankton by submerged macrophytes in an ecologically meaningful way is not easy. Multiple-approach investigations from a laboratory scale to the ecosystem level have been recommended to overcome the shortcomings of individual methods. Whether results of different methods are qualitatively or quantitatively comparable has not yet been tested. Here, we compare the sensitivity of the green algae Desmodesmus subspicatus (Chodat) E. Hegewald et Ant. Schmidt and Stigeoclonium helveticum Vischer to the allelopathic effect of the submerged macrophyte Myriophyllum verticillatum L. The following three approaches were used: (i) coincubation of algae in dialysis membrane tubes in a lake inside and outside a M. verticillatum stand, (ii) coincubation of algae in dialysis membrane tubes in aquaria with and without M. verticillatum, and (iii) single additions of tannic acid (TA), an allelopathically active polyphenol present in this macrophyte, to the algae cultures. For each method, fluorescence-based (chl a, PSII activity) and particle-based (cell count, biovolume) parameters were compared after 48 h of incubation. Results revealed quantitative and qualitative differences between methods. Algae incubated in dialysis membrane tubes in aquaria showed a strong decrease in all parameters under the influence of macrophytes. In situ measurements were influenced by adverse growth conditions for the test algae and only detected significant reductions for biovolume. Single additions of TA induced a strong reduction of fluorescence-based parameters similar to aquarium results, but an increase in the cell count. Even the qualitative transfer of laboratory results to field conditions thus requires caution and a proper selection of parameters.

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Section: Water Quality Parameters At the End Of The Experiments In Lmentioning

confidence: 99%

COMPARISON OF METHODS TO DETECT ALLELOPATHIC EFFECTS OF SUBMERGED MACROPHYTES ON GREEN ALGAE¹

Hilt¹,

Beutler²,

Bauer³

2011

Journal of Phycology

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The Structure of Algal Population in the Presence of Toxicants

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Prokhotskaya

Dmitrieva

2011

Unifying Themes in Complex Systems

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The dimensional-age structure of a laboratory population of Scenedesmus quadricauda (Turp.) Breb. in the presence of imazalyl sulfate

Cited by 2 publications

References 0 publications

COMPARISON OF METHODS TO DETECT ALLELOPATHIC EFFECTS OF SUBMERGED MACROPHYTES ON GREEN ALGAE¹

COMPARISON OF METHODS TO DETECT ALLELOPATHIC EFFECTS OF SUBMERGED MACROPHYTES ON GREEN ALGAE¹

The Structure of Algal Population in the Presence of Toxicants

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The dimensional-age structure of a laboratory population of Scenedesmus quadricauda (Turp.) Breb. in the presence of imazalyl sulfate

Cited by 2 publications

References 0 publications

COMPARISON OF METHODS TO DETECT ALLELOPATHIC EFFECTS OF SUBMERGED MACROPHYTES ON GREEN ALGAE1

COMPARISON OF METHODS TO DETECT ALLELOPATHIC EFFECTS OF SUBMERGED MACROPHYTES ON GREEN ALGAE1

The Structure of Algal Population in the Presence of Toxicants

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Product

Resources

About

COMPARISON OF METHODS TO DETECT ALLELOPATHIC EFFECTS OF SUBMERGED MACROPHYTES ON GREEN ALGAE¹

COMPARISON OF METHODS TO DETECT ALLELOPATHIC EFFECTS OF SUBMERGED MACROPHYTES ON GREEN ALGAE¹