한국 표층해역에서 미세플라스틱이 동물플랑크톤과 동물플랑크톤식자에 미치는 잠재적 영향

Abstract

The potential impact of microplastic to zooplanktivores was assessed by measuring a ratio of neustonic microplastics to zooplankton by abundance in the southern sea of Korea. Neustonic microplastics and zooplankton (0.33&#8211 2 mm) were collected using a 330-㎛ mesh Manta trawl in Geoje eastern Bay and Jinhae Bay before and after the rainy season in 2012 and 2013. And physical effect of microplastic to zooplankton was investigated in terms of probability in entanglement of zooplankton with microfiber in archived samples collected from the Yellow Sea and the Jinhae bay in 2013 and demonstrated in laboratory. The relatively high ratio indicates that zooplanktivores could be more likely to feed on microplastics than natural preys before the rainy season in 2012 and 2013. The abundances of entangled zooplankton were regionally different in coincident with the occupation percentage of microfibers and the encounter rate between microfibers and zooplankton. Laboratory experiments demonstrated that entanglement of zooplankton in fibers can happen and increased with time under the exposure condition one hundred fold higher than the environmental maximum level. These results suggested that the ratio, encounter rate between microplastic and zooplankton can indicate risk in misconception of zooplanktivores between natural preys and microplastics and in entanglement of zooplankton in fibers in the surface waters, leading to dillected using a 330-㎛ mesh Manta trawl in Geoje eastern Bay and Jinhae Bay before and after the rainy season in 2012 and 2013. And physical effect of microplastic to zooplankton was investigated in terms of probability in entanglement of zooplankton with microfiber in archived samples collected from the Yellow Sea and the Jinhae bay in 2013 and demonstrated in laboratory. The relatively high ratio indicates that zooplanktivores could be more likely to feed on microplastics than natural preys before the rainy season in 2012 and 2013. The abundances of entangled zooplankton were regionally different in coincident with the occupation percentage of microfibers and the encounter rate between microfibers and zooplankton. Laboratory experiments demonstrated that entanglement of zooplankton in fibers can happen and increased with time under the exposure condition one hundred fold higher than the environmental maximum level. These results suggested that the ratio, encounter rate between microplastic and zooplankton can indicate risk in misconception of zooplanktivores between natural preys and microplastics and in entanglement of zooplankton in fibers in the surface waters, leading to di