Korean Journal of Environment and Ecology (한국환경생태학회지)

Korean Society of Environment and Ecology (한국환경생태학회)
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Fish Community Characteristics and Inhabiting Status of Endangered Species in the Bukcheon (Stream) of Seoraksan National Park, Korea

설악산국립공원 내 북천의 어류군집 특성 및 멸종위기종의 서식양상

  • Received : 2022.03.14
  • Accepted : 2022.06.15
  • Published : 2022.08.31
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Abstract

This study investigated the characteristics of fish communities and inhabiting status of endangered species in the Bukcheon (Stream) of Seoraksan National Park, Korea from April to September 2020. A total of 4,356 fish of 7 families and 22 species were collected from 17 survey stations during the survey period. The dominant species was Zacco koreanus (relative abundance, 41.8%), and subdominant species was Rhynchocypris kumgangensis (relative abundance, 15.1%), followed by Pungtungia herzi (10.1%), Pseudopungtungia tenuicorpa (5.0%), Coreoleuciscus splendidus (4.1%), Zacco platypus (3.8%), Microphysogobio longidorsalis (3.5%), and Hemibarbus mylodon (2.2%). Among the fish species collected, 14 species (63.6%) were identified as Korean endemic species. There was one natural monument species (Hemibarbus mylodon), and four species of class II endangered wildlife that were designated by the Ministry of Environment (Acheilognathus signifer, Pseudopungtungi tenuicorpa, Gobiobotia brevibarba, and Brachymystax lenok tsinlingensis). Among the four species of class II endangered wildlife, B. lenok tsinlingensis inhabited in the upper stream, and A. signifer, P. tenuicorpa and G. brevibarba inhabited mainly in the middle-lower stream. Also, P. tenuicorpa, H. mylodon, and B. lenok tsinlingensis were inhabited in large numbers. Additionally, two cold-water fish species (R. kumgangensis and B. lenok tsinlingensis) and one landlocked species (B. lenok tsinlingensis) were collected. According to the results of cluster analysis, the dominance index decreased from upstream to downstream, but the diversity, evenness, and richness index increased; the cluster structure was divided into the uppermost, upstream, midstream, and downstream. The water quality of Bukcheon was evaluated as good overall since the river health (index of biological integrity) evaluated using fish was evaluated as very good (11 stations), good (2 stations), and normal (4 stations). However, river repair work was being carried out in some areas and some wastewater was flowing in from the midstream, therefore, supplementary measures to preserve fish habitats are required.

설악산국립공원 내 북천의 어류군집 특성 및 멸종위기종의 서식현황을 밝히기 위해 2020년 4월부터 9월까지 조사를 실시하였다. 조사기간 동안 17개 지점에서 채집된 어류는 총 7과 22종 4,356개체였다. 우점종은 참갈겨니(Zacco koreanus, 41.8%), 아우점종은 금강모치(Rhynchocypris kumgangensis, 15.1%)였으며, 그 다음으로 돌고기(Pungtungia herzi, 10.1%), 가는돌고기(Pseudopungtungia tenuicorpa, 5.0%), 쉬리(Coreoleuciscus splendidus, 4.1%), 피라미(Z. platypus, 3.8), 배가사리(Microphysogobio longidorsalis, 3.5%), 어름치(Hemibarbus mylodon, 2.2%) 등의 순으로 우세하였다. 출현종 중 한국고유종은 14종(63.6%)이 확인되어 상대비율이 높았다. 법정보호종은 천연기념물 어름치 1종과 환경부지정 멸종위기 야생생물 II급의 묵납자루(Acheilognathus signifer), 가는돌고기, 돌상어(Gobiobotia brevibarba), 열목어(Brachymystax lenok tsinlingensis) 4종이 출현하였는데, 열목어는 상류부에, 어름치와 묵납자루, 가는돌고기, 돌상어는 중·하류에 주로 서식하고 있었으며, 어름치와 가는돌고기, 열목어는 서식개체수가 많았다. 기후변화민감종(냉수성 어종)은 금강모치와 열목어 2종이 확인되었다. 군집분석 결과, 상류에서 하류로 갈수록 우점도는 낮아지나 다양도와 균등도, 풍부도는 높아지는 경향을 보였으며, 군집구조는 최상류와 상류, 중류, 하류로 구분되었다. 북천의 수질은 전체적으로 매우 좋음으로 평가되었고, 어류를 이용한 하천 건강성은 매우 좋음(11개 지점), 좋음(2개지점), 보통(4개 지점)으로 평가되어 양호하였다. 하지만 일부지역에서 하천공사가 진행되고 중류부에서 생활하수가 유입되고 있어, 이에 대한 어류 서식지 보존 대책이 요구되었다.

Keywords

Acknowledgement

이 논문은 국립공원공단 국립공원연구원 4기 국립공원 공원자원조사의 지원을 받아 수행된 연구임

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