한국 국제무역항에서 항만연속조사를 통한 위해종 판별을 위한 조사노력

Abstract

As concern about biological invasions via ballast water grows, our institute has taken several approaches to mitigate intentional and accidental transfer of harmful aquatic organisms and pathogens via ship ballast water. This study was designed to search foreign and harmful species and their environmental characteristics from port environment which is vulnerable to ballast water discharged from commercial ships. Communities of phyto- and zooplankton have been investigated seasonally at seaports of Incheon, Gwangyang, Pusan and Ulsan in Korea from 2007 to 2009. Seven seaports were additionally investigated seasonally in 2010. Twenty-five potentially risky phytoplankton consisted of 20 red-tide species and 5 toxic species. Distributional features of the red-tide phytoplankton were correlated positively with the physical factors such as salinity, dissolved oxygen and pH (p<0.05). However, distribution of the toxic species was affected positively by chemical factors like nitrate and chemical oxygen demand (p<0.01). From the viewpoint of risky species, multiple regression analysis indicated that temperature, salinity, dissolved oxygen and total suspended solid were better predictors of the variation in Acartia species at the seaports during the study than chlorophyll-a concentration when food was not limiting condition. Abundances of Noctiluca scintillans observed at the three surveyed ports did not significantly (p>0.01)gned to search foreign and harmful species and their environmental characteristics from port environment which is vulnerable to ballast water discharged from commercial ships. Communities of phyto- and zooplankton have been investigated seasonally at seaports of Incheon, Gwangyang, Pusan and Ulsan in Korea from 2007 to 2009. Seven seaports were additionally investigated seasonally in 2010. Twenty-five potentially risky phytoplankton consisted of 20 red-tide species and 5 toxic species. Distributional features of the red-tide phytoplankton were correlated positively with the physical factors such as salinity, dissolved oxygen and pH (p<0.05). However, distribution of the toxic species was affected positively by chemical factors like nitrate and chemical oxygen demand (p<0.01). From the viewpoint of risky species, multiple regression analysis indicated that temperature, salinity, dissolved oxygen and total suspended solid were better predictors of the variation in Acartia species at the seaports during the study than chlorophyll-a concentration when food was not limiting condition. Abundances of Noctiluca scintillans observed at the three surveyed ports did not significantly (p>0.01)