Key Factors Controlling Primary Production and Cyanobacterial Harmful Algal Blooms (cHABs) in a Continuous Weir System in the Nakdong River, Korea
- Title
- Key Factors Controlling Primary Production and Cyanobacterial Harmful Algal Blooms (cHABs) in a Continuous Weir System in the Nakdong River, Korea
- Author
- 신경훈
- Keywords
- WATER-LEVEL FLUCTUATIONS; MARINE-PHYTOPLANKTON; FUNCTIONAL-GROUPS; PIGMENT ANALYSIS; DYNAMICS; HPLC; TEMPERATURE; EUTROPHICATION; MICROCYSTINS; COMMUNITIES
- Issue Date
- 2020-06
- Publisher
- MDPI
- Citation
- SUSTAINABILITY, v. 12, no. 15, Article no. 6224, 21pp
- Abstract
- To identify key factors that control primary production (P.P.) and trigger cyanobacterial harmful algal blooms (cHABs), we investigated spatio-temporal variations in P.P. in a continuous weir system in the Nakdong River once or twice a month from April to October 2018. P.P. was measured through an in-situ incubation experiment using a(13)C tracer. Relative proportion of pigment-based phytoplankton composition was calculated by the CHEMTAX program based on pigment analysis using a high-performance liquid chromatography (HPLC). P.P. was higher in spring (1130 +/- 1140 mg C m(-2)d(-1)) and summer (1060 +/- 814 mg C m(-2)d(-1)) than autumn (180 +/- 220 mg C m(-2)d(-1)), and tended to increase downstream. P.P. was negatively related to PO43-(r = -0.41,p˂ 0.01) due to utilization by phytoplankton during the spring and summer when it was high. The relative proportion of pigment-based cyanobacteria (mainlyMicrocystissp.) was positively correlated with water temperature (r = 0.79,p˂ 0.01) and hydraulic retention time (HRT, r = 0.67,p˂ 0.01), suggesting that these two factors should affect cHABs in summer. Therefore, to control HRT could be one of the solutions for reducing cHABs in a continuous weir system.
- URI
- https://www.proquest.com/docview/2431160915?accountid=11283https://www.mdpi.com/2071-1050/12/15/6224https://repository.hanyang.ac.kr/handle/20.500.11754/163353
- ISSN
- 2071-1050
- DOI
- 10.3390/su12156224
- Appears in Collections:
- COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY[E](과학기술융합대학) > MARINE SCIENCE AND CONVERGENCE ENGINEERING(해양융합공학과) > Articles
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