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Red tides in Masan Bay, Korea in 2004-2005: I. Daily variations in the abundance of red-tide organisms and environmental factors

Cited 70 time in Web of Science Cited 74 time in Scopus
Authors

Jeong, Hae Jin; Yoo, Yeong Du; Lee, Kyung Ha; Kim, Tae Hoon; Seong, Kyeong Ah; Kang, Nam Seon; Lee, Sung Yeon; Kim, Jae Seong; Kim, Shin; Yih, Won Ho

Issue Date
2013-12
Publisher
Elsevier BV
Citation
Harmful Algae, Vol.30 No.SUPPL.1, pp.S75-S88
Abstract
To investigate red tides in Masan Bay, Korea, in which red tides have frequently occurred, we measured the abundance of red-tide organisms at a fixed station daily from June 2004 to May 2005. We daily measured physical, chemical, and biological properties. During the study period, 36 red-tide events occurred. Of these, 7 events were overwhelmingly dominated by cryptophytes, 5 by phototrophic dinoflagellates, 2 by diatoms, 2 by raphidophytes, 1 by a mixotrophic ciliate, and the rest by mixtures of several taxonomic groups. The durations of the red-tide events ranged from 1 to 40 days and total duration was 195 days. Most of the red tides occurred between June and September 2004 and between January and March 2005. The maximum abundance and biomass of total phototrophic dinoflagellates were 27,183 cells ml(-1) and 3516 ng C ml(-1), respectively, while those of total diatoms were 71,538 cells ml(-1) and 10,981 ng C ml(-1), respectively. Furthermore, the maximum abundance and biomass of total raphidophytes were 90,010 cells ml(-1) and 10,177 ng C ml(-1). The biomass of total phototrophic dinoflagellates had significant positive correlations with salinity, pH, dissolved oxygen, euglenophytes, raphidophytes, cyanobacteria, and heterotrophic bacteria, but negative correlations with temperature, nitrite plus nitrate and phosphate concentrations. In addition, the biomass of raphidophytes had a significant positive correlation with temperature, pH, and heterotrophic bacteria, but a negative correlation with salinity and the phosphate concentration. This evidence suggests that red-tide dynamics dominated by these phototrophic dinoflagellates and raphidophytes may be mainly affected by potential prey concentrations rather than inorganic nutrient concentrations. Daily sampling is necessary to explore red-tide dynamics in Masan Bay because the generation time of the causative species is 0.5-3 days. (C) 2013 Elsevier B.V. All rights reserved.
ISSN
1568-9883
URI
https://hdl.handle.net/10371/192711
DOI
https://doi.org/10.1016/j.hal.2013.10.008
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  • College of Natural Sciences
  • Department of Earth and Environmental Sciences
Research Area Aquatic Microbial Ecology, Biological Oceanography, Plankton

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