되솔새(Phylloscopus tenellipes)와 사할린되솔새(Phylloscopus borealoides)의 분류학적 위치에 관한 연구

국문 초록 (Abstract)

되솔새와 사할린되솔새는 번식기 지저귐에서 차이가 뚜렷하지만 형태적으로 구별이 거의 불가능한 솔새과 조류이다. 본 연구는 한국에서 번식하거나 봄․가을에 이동하는 되솔새와 사할린되솔새 2종을 대상으로 형태적 특징과 계통분류학적 위치를 분석하였다. 되솔새(Phylloscopus tenellipes)는 지리산, 설악산, 소백산을 비롯한 고지대 산림에서 흔하게 번식하는 여름철새로 확인되었으며, 사할린되솔새(P. borealoides)는 봄․가을에 비교적 흔하게 통과하는 나그네새로 확인되었다. 솔새과 내에서 두 종 사이의 유전적 거리는 ND2에서 4.12%, COX1에서 4.25%로 측정되었다. 두 종의 계통분석 결과 ND2 유전자의 경우 대략 203만년, COX1 유전자의 경우 244만년 전에 분기된 것으로 추정되었다. 이러한 DNA 정보를 기준으로 두 종의 형태 분류 시 되솔새와 사할린되솔새는 외형적 색깔로 구별이 불가능하였지만 익식의 차이에 근거하여 81.8-96.2% 수준으로 종 구별이 가능하였다. 본 연구 결과 되솔새와 사할린되솔새의 종 동정 시 형태분류와 분자유전학적인 계통분류를 상호보완적으로 활용하여야 종 구별의 정확도를 높일 수 있는 것으로 파악되었다.

다국어 초록 (Multilingual Abstract)

Two sibling species of leaf warblers, namely Pale-legged Leaf Warbler (Phylloscopus tenellipes) and Sakhalin Leaf Warbler (P. borealoides), exhibit near-identical morphology; however, their songs are markedly different during the breeding season. The present study explored the possibility of identifying these two species of leaf warblers based on morphological characteristics and DNA barcoding. The Pale-legged Leaf Warbler was identified to be a summer visitor that commonly breeds in the highland forests of Jiri, Seora, and Sobaek mountains, while the Sakhalin Leaf Warbler was identified to be a relatively common spring and autumn passage migrant. The estimated interspecific genetic distance among Phylloscopus species was 4.12% based on ND2 and 4.25% based on COX1. The two sibling species of leaf warblers diverged approximately 2.03 (ND2) to 2.44 (COX1) million years ago. Although the plumage color patterns, bare-part colors, and biometrics of Pale-legged and Sakhalin leaf warblers identified as such based on DNA barcodes were near-identical, the species could be distinguished based on the wing formula (81.8–96.2%). Integrated morphological and genetic analyses may provide more accurate information on the classification of these two morphologically indistinguishable Phylloscopus species.

목차 (Table of Contents)

• 요약
• Abstract
• 서론
• 재료 및 방법
• 결과
• 고찰
• References

참고문헌 (Reference)

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