Microphysogobio rapidus is designated as endangered species class I by Ministry of Environment, and its distribution and population have been gradually declining, and it is now limited to the Nam River and some tributary streams of the Nakdong River Watershed. For the restoration of this highly endangered species, it is important to identify the causes of the decline and establish appropriate restoration plans. However, due to lack of basic data and ecological research, most steps are stagnant. Therefore, in this study, we identified the differences in the physical, biological, and sociological habitats between current and past distributed sites through field surveys and literature reviews. As a result of the field survey, there were differences in conductivity between the current and past distributed sites, and fish communities were also showed differences. The literature data also showed that the physico-chemical values of the past distributed sites were generally unfavorable, which generated negative consequences on biological factors. In particular, the effects of urbanization were found to be a major factor affecting the habitat of M. rapidus. Habitat stabilization is crucial for the recovery of this endangered species. However, in the past distributed sites, disturbances such as stream development and weir construction have altered streams physico-chemically and result in changes of M. rapidus. Therefore, a comprehensive plan that considers both stream connectivity and water quality is needed to manage and restore the habitat of M. rapidus.

서 론
재료 및 방 법
    1. 조사지점 및 시기
    2. 조사 방법
    3. 서식지 특성 평가
    4. 자료 분석
결 과
    1. 여울마자 현장조사 결과
    2. 현재출현지점과 과거출현지점 서식지 특성 비교
고 찰
적 요

• 윤주덕(국립생태원 멸종위기종복원센터) | Ju-Duk Yoon (Research Center for Endangered Species, National Institute of Ecology, Yeongyang 36531, Republic of Korea) Corresponding author
• 김근식(국립생태원 멸종위기종복원센터) | Keun-Sik Kim (Research Center for Endangered Species, National Institute of Ecology, Yeongyang 36531, Republic of Korea)
• 박창득(국립생태원 멸종위기종복원센터) | Chang- Deuk Park (Research Center for Endangered Species, National Institute of Ecology, Yeongyang 36531, Republic of Korea)
• 강동원(국립생태원 멸종위기종복원센터) | Dong-Won Kang (Research Center for Endangered Species, National Institute of Ecology, Yeongyang 36531, Republic of Korea)
• 이흥헌(이엔이환경생태연구소) | Heung-Heon Lee (E&E Environment and Ecology Research Institute, Jeonju 55021, Republic of Korea)
• 임치홍(서울여자대학교 화학생명환경과학부) | Chi-Hong Lim (Division of Chemistry and Bio-Environmental Sciences, Seoul Women’s University, Seoul 01797, Republic of Korea)
• 김남신(국립생태원) | Nam-Shin Kim (National Institute of Ecology, Seocheon 33657, Republic of Korea)