한국연안역 표층수괴내 미세플라스틱 공간적 분포특성

Abstract

We investigated the occurrence of microplastics in the surface waters along the coast of Yellow and South Sea of Korea to examine the relation between the spatial patterns and the local characteristics. The studied area included six semi-enclosed bays consisting of special management and environmentally conservative areas designated by the government. Surveys were carried out in July after rainy season in 2015 and 2016 using a Manta-trawl with 330 ㎛mesh. Microplastic particles were counted and classified into fragment (EPS, paint particles, fragment), sphere (EPS, sphere), fiber, film, and pellet in the Yellow and South Sea. And the size classes were selected as 0.33-0.5㎜, 0.5-1㎜ and 1-5㎜. The average abundances of total microplastics ranged from 1.12-1.64 particles/m3 (Southern coast) in 2015 and from 1.70-2.79 particles/m3 (Western coast) in 2016. From all study areas, microplastics with size class of 0.33-0.5 ㎜ numerically dominated compared to other size classes, except for Cheonsu bay, where microplastics dominated with size classes of 0.5-1 and 1-5㎜. Dominant types of microplastics were fibers (polyester, polypropylene and cotton) (33.3-58.7%) for all size classes in the Southern coast, while paint particles (alkyds) (16.5-49.4%) and fibers (polyester, polypropylene and cotton) (26.9-30.4%) dominated to the total microplstics in the Western coast. Exceptionally, EPS (39.1%) dominated to the total microplaclosed bays consisting of special management and environmentally conservative areas designated by the government. Surveys were carried out in July after rainy season in 2015 and 2016 using a Manta-trawl with 330 ㎛mesh. Microplastic particles were counted and classified into fragment (EPS, paint particles, fragment), sphere (EPS, sphere), fiber, film, and pellet in the Yellow and South Sea. And the size classes were selected as 0.33-0.5㎜, 0.5-1㎜ and 1-5㎜. The average abundances of total microplastics ranged from 1.12-1.64 particles/m3 (Southern coast) in 2015 and from 1.70-2.79 particles/m3 (Western coast) in 2016. From all study areas, microplastics with size class of 0.33-0.5 ㎜ numerically dominated compared to other size classes, except for Cheonsu bay, where microplastics dominated with size classes of 0.5-1 and 1-5㎜. Dominant types of microplastics were fibers (polyester, polypropylene and cotton) (33.3-58.7%) for all size classes in the Southern coast, while paint particles (alkyds) (16.5-49.4%) and fibers (polyester, polypropylene and cotton) (26.9-30.4%) dominated to the total microplstics in the Western coast. Exceptionally, EPS (39.1%) dominated to the total micropla