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Title 

K:Fe ratio as an indicator of cyanobacterial bloom in a eutrophic lake

Authors 

Chi-Yong AhnDae Kyun ParkHee Sik KimA S ChungHee-Mock Oh

Publisher 

The Korean Society for Applied Microbiology

Issue Date 

2004

Citation 

Journal of Microbiology and Biotechnology, vol. 14, no. 2, pp. 290-296

Keywords 

bloomcyanobacteriadaechung reservoirindicatorK:Fe ratiobiological markercalciumchlorophyll amagnesiumphycocyanin

Abstract 

The effects of potassium, sodium, calcium, magnesium, and iron on cyanobacterial bloom potentials were investigated in Daechung Reservoir, Korea. Potassium showed the highest correlation with the cyanobacterial cell number (r=0.487, P<0.05) and phycocyanin concentration (r=0.499, P<0.05). However, it was not likely that the potassium had directly affected the bloom formation, because the variations of its concentration were not significantly large. In contrast, the Fe concentration fluctuated drastically and exhibited a negative correlation with the cyanobacterial cell number (r=0.388, P<0.1) and phycocyanin concentration (r=0.446, P<0.05). Accordingly, the K:Fe atomic ratio would appear to reflect the extent of cyanobacterial bloom more precisely than K or Fe alone. The K:Fe ratio specifically correlated with cyanobacterial percentage, the cyanobacterial cell number and phycocyanin concentration (r=0.840, P<0.001; r=0.416, P<0.05; r=0.522, P<0.01, respectively). With the K:Fe atomic ratio of over 200, the chlorophyll-a concentration, cyanobacterial cell number, and phycocyanin concentration exceeded 10 μg l-1, 20,000 cells ml-1, and 20 pM, respectively, the general criteria of eutrophic water.

ISSN 

1017-7825

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2017-04-19


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