생태와환경 (Korean Journal of Ecology and Environment)

  • 제52권4호
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  • Pages.378-384
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  • 2019
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  • 2288-1115(pISSN)
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  • 2288-1123(eISSN)
한국수생태학회 (The Korean Society of Limnology)
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제주도에 서식하는 붉은귀거북(Trachemys scripta elegans) 번식에 중요한 환경적인 요소 분석

Analysis on the Important Environmental Factors for Reproduction of Trachemys scripta elegans in Jeju Island, South Korea

  • Koo, Kyo Soung (Research Center of Ecomimetics, Chonnam National University) ;
  • Sung, Ha-Cheol (Department of Biological Science, Chonnam National University)
  • 투고 : 2019.08.18
  • 심사 : 2019.11.25
  • 발행 : 2019.12.31
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초록

전 세계적으로 붉은귀거북(Trachemys scripta elegans)은 새로운 지역으로 유입되어 토착 생태계를 교란하는 대표적인 외래생물이다. 국내에는 1970년대부터 방생과 애완의 목적으로 수입되었으며, 현재 남한 전역에 걸쳐 발견되고 있다. 또한 자연적인 번식과 확산이 지속적으로 관찰되고 있는 실정이다. 본 연구에는 제주도 지역에서 발견되는 붉은귀거북을 대상으로 자연적인 번식에 영향을 미치는 환경적인 요소를 파악하고자 하였다. 먼저, 2012년부터 2017년까지 제주도 내 붉은귀거북의 분포를 조사하였다. 붉은귀거북의 번식이 확인되는 지역과 그렇지 않는 지역을 대상으로 주변의 토지 피복과 서식지 기후의 차이를 비교하였다. 연구 결과, 붉은귀거북은 선행 연구에서 기록한 15개 지역에서 증가한 38개 지점에서 발견되었다. 그 중 번식 확인된 지역은 21개, 단순히 서식만 확인된 지역은 17개 지역이었다. 붉은귀거북의 전체 그리고 성체만의 개체수는 번식지가 유의미하게 많았다(P<0.001). 붉은귀거북의 번식이 이루어지는 서식지 주변의 토지 피복의 경우, 밭의 비율이 뚜렷하게 높았지만(P<0.001), 비번식지에서는 뚜렷한 차이가 나타나지 않았다(P>0.05). 한편, 붉은귀거북의 번식지와 비번식지 간의 기후적인 차이는 뚜렷하게 나타나지 않았으며(P>0.05), 어떠한 기후 요소도 붉은귀거북의 번식과 관련되지 않았다(P>0.05). 본 연구의 결과를 통해 제주도 내에서는 붉은귀거북의 번식에는 서식지 주변의 토지 피복 즉 번식 가능한 환경의 존재가 중요하다는 것을 확인하였다. 따라서 붉은귀거북이 발견되는 서식지의 주변 환경을 우선적으로 파악하는 것은 번식과 확산을 제어를 위한 효과적인 방법이 될 것이다.

Red-eared slider, Trachemys scripta elegans, is one of the most famous species to disturb native ecosystems in the world. In South Korea, the species was imported as pet, and now it is found whole of the country. Recent, natural breeding and spreading of the turtle has been reported. In this paper, we investigated the environmental factors to affect the reproduction of T. s. elegans. We surveyed the distribution of the turtle in Jeju island, South Korea, between 2012 to 2017. We compared the land covers and climate of habitats from breeding sites and non-breeding sites. The species was found from 38 sites in Jeju island; 21 of breeding sites and 17 of non-breeding sites. The number of total and only adult turtles was significantly higher in breeding sites than non-breeding sites (P<0.05). In breeding site, the reproduction rate from the farmland was significantly higher than others(P<0.05). However, the rate of land covers was not significant in non-breeding site (P>0.05). The difference on the climate between breeding and non-breeding was not significant(P>0.05). Moreover, none of climate factors affected to reproduction of T. s. elegans(P>0.05). Our study showed that the land covers surrounding the habitats are more important than climate for reproduction of T. s. elegans in Jeju island. This result indicates investigating the habitat and surrounding is necessary for the control of reproduction and spreading of the introduced species.

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