장기 환경자료를 활용한 코클로디니움 적조 메커니즘에 대한 가설 검증 연구

Abstract

Harmful Cochlodinium polykrikoides blooms have continuously occurred and caused large damage to the fishing industry since 1995 in the southern coastal waters of Korea. Earlier studies hypothesized that the environmental factors associated with outbreaks of C. polykrikoides blooms include water mass stratification, internal and external nutrients supply, solar irradiance and/or wind. These studies, however, have limitations in that analysis focused only on specific incidences so that require more rigorous verification. In the present study, a comparative analysis using meteorologic and oceanographic survey data (2000-2014) was conducted to see if the hypotheses could consistently explain bloom outbreaks at different locations. The analysis indicated that none of the proposed factors explained C. polykrikoides bloom outbreaks for the whole study period, and that critical factors differed by region and period. For example, precipitation showed a significant correlation with the outbreak duration in Yeosu for the period 1996-2003 but not for the whole period (1996-2014). Likewise, wind (direction and speed) and front formation explained incidences in only certain areas and in some years. These analyses suggest that the actual outbreak mechanisms are complicated and consist of multiple pathways that can alternate depending on the balance of many factors working in sequence rather than simultaneously.with outbreaks of C. polykrikoides blooms include water mass stratification, internal and external nutrients supply, solar irradiance and/or wind. These studies, however, have limitations in that analysis focused only on specific incidences so that require more rigorous verification. In the present study, a comparative analysis using meteorologic and oceanographic survey data (2000-2014) was conducted to see if the hypotheses could consistently explain bloom outbreaks at different locations. The analysis indicated that none of the proposed factors explained C. polykrikoides bloom outbreaks for the whole study period, and that critical factors differed by region and period. For example, precipitation showed a significant correlation with the outbreak duration in Yeosu for the period 1996-2003 but not for the whole period (1996-2014). Likewise, wind (direction and speed) and front formation explained incidences in only certain areas and in some years. These analyses suggest that the actual outbreak mechanisms are complicated and consist of multiple pathways that can alternate depending on the balance of many factors working in sequence rather than simultaneously.