어류군집 분석을 통해 확인한 영랑호의 해양화

초록

In this study, we focused primarily on analyzing the fish community in Lake Yeongrang, a representative lagoon in Korea, aiming to investigate changes in the aquatic ecosystem of this lake by comparing the fish community surveyed before 2009 with the conditions observed after that year. For this purpose, four surveys were conducted from December 2022 to October 2023 at five different locations, collecting a total of 3,498 individuals from 26 families and 42 species. A comparison with past data revealed significant changes in the composition of primary freshwater fish, peripheral freshwater fish, and seawater fish. Regarding species, the research findings indicated notable differences compared with past data. The percentage of primary freshwater fish was 10% lower, that of peripheral freshwater fish was 20% lower, and that of seawater fish showed an increase of over 30% compared to past data. A similar pattern was observed when considering individual counts. Primary freshwater fish exhibited a decrease of 12%, peripheral freshwater fish decreased by over 5%, and seawater fish showed an increase of more than 16% compared to previous data. Therefore, the aquatic ecosystem of Lake Yeongrang appears to have undergone significant marinification, largely owing to human-induced interventions. The distinctive function of the lagoon, characterized by material cycling influenced by the breaking sandbar, has been substantially compromised. Additionally, the aquatic ecosystem of Lake Yeongrang was affected by the installation of a floating bridge. Therefore, continuous monitoring and research are required.

키워드