황해에서 채집된 동물플랑크톤 시료에서 확인된 미세플라스틱의 공간적 분포

Abstract

We investigated abundance and composition of microplastics in archived zooplankton samples collected from the Yellow Sea, where samples were acquired at five different layers in 12 stations using a closing net (mesh size: 200 &micro m) in April and August 2013. Total microplastic abundances in the surface waters (0-10m) were most dominant (8.71~25.22 particles/m3 in April, 3.77~9.44 particles/m3 in August), while those in the lower layers (40~90m) were relatively low (0.00~9.98 particles/m3 in April, 0.00~7.34 particles/m3 in August). Types of the microplastic were fiber, sphere, hard plastic, other foamed and paint particles, of which polymer types were polypropylene, polyester, cotton, polystyrene, polyethylene, polyethylene terepthalate and alkyd. Among the polymer types, polypropylene dominated to total microplastic in the surface waters, while polyester dominated in the lower waters during the study. The fiber accounted for 59.2% (Avg. 5.1 particles/m3) in April and 72.8% (Avg. 2.5 particles/m3) in August of the total microplastics. The polymer types of fibers consisted of polypropylene, polyester and cotton, of which polypropylene was dominant type as 48.1% in April, and 52.9% in August. The ratio of microplastic-to-zooplankton, indicating encounter rate ranged generally higher in the surface waters compared to other strata during the study. These results indicated that vulnerability of plankton or planktivpril and August 2013. Total microplastic abundances in the surface waters (0-10m) were most dominant (8.71~25.22 particles/m3 in April, 3.77~9.44 particles/m3 in August), while those in the lower layers (40~90m) were relatively low (0.00~9.98 particles/m3 in April, 0.00~7.34 particles/m3 in August). Types of the microplastic were fiber, sphere, hard plastic, other foamed and paint particles, of which polymer types were polypropylene, polyester, cotton, polystyrene, polyethylene, polyethylene terepthalate and alkyd. Among the polymer types, polypropylene dominated to total microplastic in the surface waters, while polyester dominated in the lower waters during the study. The fiber accounted for 59.2% (Avg. 5.1 particles/m3) in April and 72.8% (Avg. 2.5 particles/m3) in August of the total microplastics. The polymer types of fibers consisted of polypropylene, polyester and cotton, of which polypropylene was dominant type as 48.1% in April, and 52.9% in August. The ratio of microplastic-to-zooplankton, indicating encounter rate ranged generally higher in the surface waters compared to other strata during the study. These results indicated that vulnerability of plankton or planktiv