Impact of human activities on changes of ichthyofauna in Dongjin River of Korea in the past 30 years
- 주제(키워드) artificial water diversion tunnels , Dongjin River , exotic species , fish community , Icthyofauna
- 등재 SCIE, SCOPUS, KCI등재
- 발행기관 Taylor and Francis Ltd.
- 발행년도 2017
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000145501
- 본문언어 영어
- Published As http://dx.doi.org/10.1080/19768354.2017.1330223
- 저작권 이화여자대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
Ichthyofauna and fish community were investigated at 17 representative stations of the Dongjin River drainage system from spring to fall in 2014. The survey resulted in a list of 53 species belonging to 14 families structured into 4 distinctive parts along the river: uppermost-stream, upper-stream, mid-stream, and lower-stream. Comparison of species lists with 30-year interval exhibited significant decreases in peripheral freshwater fishes, Acheilognathinae, endemic, and indigeneity species, but increases in exotic, epipelagic, and lentic species. Moreover, in the estuary of the Dongjin River drainage system, peripheral freshwater fish species were replaced by pure freshwater fish species due to the Saemangeum sea-wall project. In the upper region of the river, introduced eight alien species from Seomjin River via water diversion tunnels. In the mid-lower region, the construction of floodgates and numerous small weirs caused expansion of lentic water areas, facilitating the spread of problematic exotic species such as Micropterus salmoides, Lepomis macrochirus, and Carassius cuvieri. Also, water deterioration in this region resulted in an increase of tolerant species and a decrease of sensitive and endemic species. Our results suggest that a recovery strategy for a healthy ecosystem in the Dongjin River drainage system should reflect this compartmentalized cause and effect on the changes of icthyofauna. © 2017 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group
more