Rainfall, phycocyanin, and N : P ratios related to cyanobacterial blooms in a Korean large reservoir

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Title
Rainfall, phycocyanin, and N : P ratios related to cyanobacterial blooms in a Korean large reservoir
Author(s)
Chi-Yong Ahn; A S Chung; Hee Mock Oh
Bibliographic Citation
Hydrobiologia, vol. 474, no. 1, pp. 117-124
Publication Year
2002
Abstract
Nutrient concentrations and other environmental factors were measured in the Daechung Reservoir for 25 weeks from spring until autumn in 1999. The high irradiance after heavy rainfall provided optimal meteorological conditions for bloom formation during summer, therefore, rain would also appear to forecast imminent bloom. The bloom formation was largely governed by cyanobacteria, in particular, Microcystis spp. and Anabaena spp. Phycocyanin showed higher correlation with cyanobacteria (r = 0.744, P < 0.001) compared to chlorophyll-a (r = 0.599, P < 0.01). Therefore, phycocyanin was more accurate and useful than chlorophyll-a in quantitatively measuring cyanobacterial blooms. The atomic N:P ratio of the particulate form also showed a high correlation with cyanobacteria (r = 0.541, P < 0.01), increasing from 4.3 to 14.6 during bloom formation, while that of the dissolved form decreased from 25.5 to 8.7. These results indicated that the algae assimilated N significantly without comparable P uptake during the blooming season, which was in sharp contrast to the excessive storage of P during the spring.
Keyword
bloomcyanobacteriaindicatorN:P ratiophycocyaninrainfall
ISSN
0018-8158
Publisher
Springer
DOI
http://dx.doi.org/10.1023/A:1016573225220
Type
Article
Appears in Collections:
Synthetic Biology and Bioengineering Research Institute > Cell Factory Research Center > 1. Journal Articles
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