Korean Journal of Ecology and Environment (생태와환경)

The Korean Society of Limnology (한국수생태학회)
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Habitat Use and Food Materials of the Endangered Swan Goose (Anser cygnoides) during the Wintering Season

멸종위기 개리 (Anser cygnoides)의 월동기 서식지 이용과 먹이원

  • Choi, Yu-Seong (Division of Basic Research, National Institute of Ecology) ;
  • Joo, Sungbae (Division of Basic Research, National Institute of Ecology) ;
  • Kim, Myun-Sik (Department of Biology, Kyung Hee University) ;
  • Han, Donguk (Fundamental Research Division, National Marine Biodiversity Institute of Korea) ;
  • Jeong, Gilsang (Division of Basic Research, National Institute of Ecology)
  • 최유성 (국립생태원 생태기반연구실) ;
  • 주성배 (국립생태원 생태기반연구실) ;
  • 김면식 (경희대학교 생물학과) ;
  • 한동욱 (국립해양생물자원관 해양생물기반연구본부) ;
  • 정길상 (국립생태원 생태기반연구실)
  • Received : 2017.05.08
  • Accepted : 2017.06.21
  • Published : 2017.06.30
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Abstract

We surveyed the habitat use and food materials of the endangered Swan Goose (Anser cygnoides) during the wintering period at the Seocheon tidal flat. The bird wintered about six months from October 2014 to early April 2015 at the flat. They showed a remarkable change in choosing their feeding habitat and prey. They stayed entirely at sedge grass patches on Songrim tidal flat during the early wintering period (October), while after November they gradually moved to Janggu bay and used rice paddy fields as well as sedge patches on the tidal flats as their feeding site. The dietary analysis showed the sedge grass (Bolboschoenus sp., Cyperaceae) was the main dietary source during the entire wintering period. Interestingly, the proportion of Cyperaceae on feces decreased slightly over wintering time, while the proportion of Fabaceae increased relatively since November. These results suggest that the Swan Geese switched their habitat and food sources in response to the change of food availability. The Seocheon tidal flat area is the important wintering site for Swan Geese and sedge grass patches in the area need to be managed as the main feeding area for the wintering Swan Geese.

멸종위기종 개리(Anser cygnoides)의 월동기 서식지 이용과 먹이원에 대해 연구하였다. 개리는 서천갯벌에 10월에 도래하여 약 6개월간 월동한 후, 다음해 4월초에 월동지를 떠나 번식지로 이동하였다. 서천갯벌에서 월동하는 동안 개리는 뚜렷한 지역 간 이동, 서식지 이용 패턴을 보였다. 즉 도래초기인 10월에는 주로 송림리 갯벌의 매자기류 (Bolboschoenus sp.) 군락지를 집중하여 이용하였으나, 11월부터는 장구만 지역으로 이동하여 연안 갯벌에 일부 존재하는 매자기류 군락지와 인근 농경지에서 섭식활동을 하였다. 배설물에서 추출한 유전자 분석을 통해 개리가 사초과의 매자기류 식물을 월동기간 동안 주먹이원으로 이용한다는 것을 확인하였다. 또한 분포와 섭식지 이용에 변화를 보이는 시기에 사초과 식물 외에도 콩과 식물의 검출양이 증가하였다. 이러한 결과는 개리가 월동기간 동안 섭식하는 먹이원의 이용가능성 변화에 반응하여 서식지를 이용하는 전략을 취하는 것으로 평가된다. 서천갯벌은 개리의 월동지로서 가치가 있으며, 특히 송림리와 장구만 지역에 분포하는 매자기류 군락지는 월동기간 동안 개리가 이용하는 핵심지역으로 보호되어야 한다.

Keywords

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