Abstract
Abstract This study aimed to understand relationship between potential risky species and environmental factors at ports in Korea. During the study periods, 25 potential risky species (red tide and toxic species) representing 20 red-tide species, 5 toxic species were observed in the all ports. Skeletonema costatum (red-tide species) was predominated in all study area. This species showed positive correlation with pH, while negative correlation with dissolved oxygen ( p <0.05) at Busan port. Also, this species showed positive correlation with total suspended solids and pH ( p <0.05) at Ulsan port. However, Sk. costatum showed positive correlation with nitrate at Incheon port ( p <0.01). Pseudo-nitzschia spp. producing amnesic shellfish poison (domoic acid) showed positive correlation withnitrate and silicate in all study areas ( p <0.05). Alexandrium spp. (paralytic shellfish poison) and Dinophysis acuminata (diarrhetic shellfish poison) were affected by chemical oxygen demand (
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