Grazing of the copepod Cyclops vicinus on toxic Microcystis aeruginosa : potential for controlling cyanobacterial blooms and transfer of toxins

• Autorzy: Mohamed Z. A. , Bakr A. A. , Ghramh H. A.

Identyfikatory

DOI

10.1515/ohs-2018-0028

• Języki publikacji: EN

Abstrakty

EN

Grazing of zooplankton on phytoplankton may contribute to a reduction of harmful cyanobacteria in eutrophic waters. However, the feeding capacity and interaction between zooplankton and toxic cyanobacteria vary among grazer species. In this study, laboratory feeding experiments were designed to measure the grazing rate of the copepod Cyclops vicinus on Microcystis aeruginosa and the potential microcystin (MC) accumulation in the grazer. Copepods were fed a mixed diet of the edible green alga Ankistrodesmus falcatus and toxic M. aeruginosa for 10 days. The results showed that C. vicinus efficiently ingested toxic Microcystis cells with high grazing rates, varying during the feeding period (68.9–606.3 Microcystis cells animal^-1 d^-1) along with Microcystis cell density. Microcystis cells exhibited a remarkable induction in MC production under grazing conditions with concentrations 1.67–12.5 times higher than those in control cultures. Furthermore, C. vicinus was found to accumulate MCs in its body with concentrations increasing during the experiment (0.05–3.21 μg MC animal^-1). Further in situ studies are needed to investigate the ability of Cyclops and other copepods to assimilate and detoxify MCs at environmentally relevant concentrations before deciding on the biocontrol of Microcystis blooms by copepods.

Słowa kluczowe

EN

Cyclops; copepods; grazing; Microcystis; microcystin; accumulation

• Wydawca: Institute of Oceanography University of Gdańsk
• Czasopismo: Oceanological and Hydrobiological Studies
• Rocznik: 2018
• Tom: Vol. 47, No. 3
• Strony: 296--302
• Opis fizyczny: Bibliogr. 47 poz.

Twórcy

autor

Mohamed Z. A.

• Department of Botany & Microbiology, Faculty of Science, Sohag University, Sohag 82524, Egypt

autor

Bakr A. A.

• King Khalid University, Abha 61413, P.O. Box 9004, Saudi Arabia2

autor

Ghramh H. A.

• Department of Botany & Microbiology, Faculty of Science, Sohag University, Sohag 82524, Egypt

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).