caa a22 4500 465811043 CHVBK 20180323112116.0 cr unu---uuuuu 170327e19900601xx s 000 0 eng 10.1007/BF02123434 doi (NATIONALLICENCE)springer-10.1007/BF02123434 Nakamura Yasuo Laboratory of Marine Environment, the National Institute for Environmental Studies, Onogawa, Tsukuba, 305, Ibaraki, Japan aut Chemical environment for red tides due to Chattonella antiqua [Elektronische Daten] Part 3. Roles of iron and copper [Yasuo Nakamura] In order to assess the roles of Fe and Cu in outbreaks ofChattonella antiqua red tide, concentrations of these metals in the surface seawater were monitored around the Ie-shima Islands in the Seto Inland Sea during the summers of 1986-1988. Bioassay of the surface seawater with respect to Fe and Cu was also conducted using a cultured strain ofC. antiqua. Concentrations of Fe and Cu in the filtered seawater (FeF and CuF) were in the range of 3.9-10.0 and 9.3-11.2 nM, respectively. The bioassay with respect to Fe revealed that Fe at the surface layer was usually insufficient to support the maximum growth rate ofC. antiqua, except whenC. antiqua was dominant in the field. However, correlations between FeF and the growth rate of the control cultures (Fe, EDTA=not enriched; N, P, B12=enriched at optimum levels) were not apparent, probably because FeF did not reflect the concentration of available Fe. The bioassay with respect to Cu was coupled with the CuF values obtained. The results indicated that Cu at the surface layer was detoxified by complexation with natural organic ligand(s), and that pCu (=minus log of cupric ion activity) was 11.5-11.7, optimum for the growth ofC. antiqua, throughout the survey period. It is suggested that Fe, but not Cu, is a potentially important factor in regulating the natural populations ofC. antiqua in the Seto Inland Sea. the Oceanographical Society of Japan, 1989 Journal of the Oceanographical Society of Japan Kluwer Academic Publishers 46/3(1990-06-01), 84-95 0029-8131 46:3<84 1990 46 10872 https://doi.org/10.1007/BF02123434 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02123434 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Nakamura Yasuo Laboratory of Marine Environment, the National Institute for Environmental Studies, Onogawa, Tsukuba, 305, Ibaraki, Japan aut NATIONALLICENCE 773 0- Journal of the Oceanographical Society of Japan Kluwer Academic Publishers 46/3(1990-06-01), 84-95 0029-8131 46:3<84 1990 46 10872 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer