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Effects of basic oxygen furnace slag and inorganic nutrients on the germination of resting cysts of two toxic dinoflagellates.
J Environ Biol ; 2004 Apr; 25(2): 147-50
Article in English | IMSEAR | ID: sea-113152
ABSTRACT
Effects of basic oxygen furnace (BOF) slag, inorganic nutrients and H2S on the germination of resting cysts of two toxic dinoflagellates Alexandrium catenella/tamarense and Gymnodinium catenatum were studied in batch cultures. The germination rate of the test species has increased by 23-25%, when the concentration of NO3--N or H2S in culture medium has increased to 2.0 ppm. At the treatment of enriched NH4+-N and PO43--p, the germination of resting cyst was increased. Nevertheless, the increased range in germination rates was less than those of NO3--N and H2S. When BOF slag in culture medium increased to 50 mg/ml (or 500 g/m2), the cyst germination rate fell to less than 5%. At higher level of concentrations germination was completely inhibited. Adding BOF slag to the culture medium reduced the concentration of inorganic salts and H2S in seawater and sediments, resulting in the inhibition of cyst germination. These findings demonstrate the potential use of BOF slag on the sediments seed bank of red tide organism because it has an ability to inhibit resting cysts germination.
Subject(s)
Full text: Available Index: IMSEAR (South-East Asia) Main subject: Oxygen / Water Pollutants / Dinoflagellida / Population Dynamics / Germination / Oocysts / Eutrophication / Industrial Waste / Animals Language: English Journal: J Environ Biol Year: 2004 Type: Article

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Full text: Available Index: IMSEAR (South-East Asia) Main subject: Oxygen / Water Pollutants / Dinoflagellida / Population Dynamics / Germination / Oocysts / Eutrophication / Industrial Waste / Animals Language: English Journal: J Environ Biol Year: 2004 Type: Article