Toxic phytoplankton

Sušek, Marta (2009) Toxic phytoplankton. Bachelor's thesis, Faculty of Science > Department of Biology.

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Abstract

Of about 5000 known species of phytoplankton, about 75 have the ability to produce toxins in defense against predators or reducing competition with other species. Ficotoxins production is mostly pronounced in periods of bloom, when the population density is high. Number of factors, such as water temperature, ocean currents and concentrations of nutrients have an impact on phytoplankton blooms. Filter-feeding animals, like shellfish and some species of fish concentrate ficotoxins in their tissues. Consumption of contaminated shellfish or fish have a toxic effect to marine mammals, birds and humans. Human consumption of ficotoxins can cause a variety of simptoms, including death. Toxic phytoplankton species are widespread in oceans and freshwaters of subpolar, temperate and tropical latitudes. In the oceans, the most common cause of toxicity are dinoflagellates and diatoms. In freshwaters, toxins are produced mainly by cyanobacteria.

Item Type: Thesis (Bachelor's thesis)
Supervisor: Plenković-Moraj, Anđelka
Date: 2009
Number of Pages: 13
Subjects: NATURAL SCIENCES > Biology
Divisions: Faculty of Science > Department of Biology
Depositing User: Silvana Šehić
Date Deposited: 05 Dec 2014 10:32
Last Modified: 05 Dec 2014 10:32
URI: http://digre.pmf.unizg.hr/id/eprint/3463

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