NDLI: Factors regulating bluegreen dominance in a reservoir directly influenced by the Asian monsoon

Content Provider	Springer Nature Link
Author	An, Kwang Guk Jones, John R.
Copyright Year	2000
Abstract	Current hypotheses, based on physical and chemical theory, that account for bluegreen-blooms in lakes were evaluated in Taechung Reservoir, Korea, during May 1993–November 1994. Seasonal patterns of chlorophyll (Chl) were similar in 1993 and 1994, but the taxonomic composition and size structure of the phytoplankton communities differed between years. During August–September 1994, bluegreens comprised >80% of total cell numbers and net-Chl (fraction of Chl>35 μm) was 63% of total Chl, whereas in 1993, diatoms (Melosira) were the major taxa, and ultra-Chl (<11 μm) dominated. The major factor influencing bluegreen dominance in 1994 was a weak monsoon which was directly linked to strong water column stability (>25 kg μm−2), high water temperature (>28°C), and reduced silica input. Low N/or N:P ratios and the concentration of monovalent cations (Na+ and K+) were not determining factors in this system, but light and pH seemed to act as secondary factors. Our study suggests that the magnitude and frequency of bluegreen blooms in Asian waterbodies may be reduced during an intense monsoon, but increased during a weak monsoon.
Starting Page	37
Ending Page	48
Page Count	12
File Format	PDF
ISSN	00188158
Journal	Hydrobiologia
Volume Number	432
Issue Number	1-3
e-ISSN	15735117
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2000-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ecology Hydrobiology
Content Type	Text
Resource Type	Article
Subject	Aquatic Science

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