유해 남조류의 세계적 발생현황 및 녹조제어를 위한 질소와 인-제한 전략
Global Occurrence of Harmful Cyanobacterial Blooms and N, P-limitation Strategy for Bloom Control
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초록
Increased harmful algal blooms by cyanobacteria are threatening public health andlimiting human activities related with freshwater ecosystems. Phosphorus (P) has long beensuggested as a critical nutrient for cyanobacterial bloom through field research in Canada duringthe 1970s, proposing a P-based freshwater management guideline. However, recently, nitrogen(N) has also been highlighted as an impacting nutrient on cyanobacterial harmful algal blooms(CyanoHABs). Due to the intensive and frequent observation of Microcystis, this kind of paradigmshift from P limitation to season-dependent N or P limitation has an important implication for adual nutrient management strategy in eutrophic freshwaters. Through recent internationalresearches, general strategies to control CyanoHABs in lakes and reservoirs are as follows: a dualnutrient (N & P) reduction, wastewater collection and treatment, pre-treatment of influent waterin buffer zones, dredging of sediment, reduction of residence time, algal collection, and precipitationand flocculation of cyanobacteria. In addition, sustainable and integrative freshwater algaemanagement should be carried out, based on the ecological aspect, because cyanobacteria are notthe target organism to be eradicated, but an essential microbial member in the freshwaterecosystem.
Abstract
Increased harmful algal blooms by cyanobacteria are threatening public health andlimiting human activities related with freshwater ecosystems. Phosphorus (P) has long beensuggested as a critical nutrient for cyanobacterial bloom through field research in Canada duringthe 1970s, proposing a P-based freshwater management guideline. However, recently, nitrogen(N) has also been highlighted as an impacting nutrient on cyanobacterial harmful algal blooms(CyanoHABs). Due to the intensive and frequent observation of Microcystis, this kind of paradigmshift from P limitation to season-dependent N or P limitation has an important implication for adual nutrient management strategy in eutrophic freshwaters. Through recent internationalresearches, general strategies to control CyanoHABs in lakes and reservoirs are as follows: a dualnutrient (N & P) reduction, wastewater collection and treatment, pre-treatment of influent waterin buffer zones, dredging of sediment, reduction of residence time, algal collection, and precipitationand flocculation of cyanobacteria. In addition, sustainable and integrative freshwater algaemanagement should be carried out, based on the ecological aspect, because cyanobacteria are notthe target organism to be eradicated, but an essential microbial member in the freshwaterecosystem.
참고문헌 (23)
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