한국 서남부 농촌 경관 내 숲에 서식하는 나방 군집의 시간적 변화 양상
Trend of temporal change in moth communities in forests of the agricultural landscape of southwestern South Korea
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초록
이 연구에서는 한국 서남부 농촌 경관 내에서 농경지로 고립되어 있는 숲과 연속되어 있는 산림 속 숲에 서식하는 나방의 종 다양성 양상이 10년 동안 어떻게 변화했는가를 알아보았다. 농경지 주변 숲 경관에서 나방 다양성은 과거와 현재 종수는 다소 늘어났지만 개체수는 줄어들었고 산림 숲에서 출현한 나방은 과거에 비해 현재 종수와 개체수 모두 증가하였지만 두 지역 모두 통계적으로 유의하게 나타나지 않았다. 나방 개체수 증감에 날개편 길이를 이용한 나방 크기를 살펴본 결과 농경지 주변 숲에서는 관련이 있었지만 산림 숲 지역에서는 관련이 나타나지 않았다. 농경지 숲과 산림지 숲 간의 시간적 공간적 분석결과 서식지 유형과 시간에 따라 나방 군집에서 차이가 나타나는 것을 확인할 수 있었다. 추후 이러한 나방 군집 변화가 나방 크기 이외 다른 생태학적 요인과 영향을 받는지 그리고 장기적으로 어떻게 변화가 이루어지는지 살펴볼 필요가 있다.
Abstract
The aim of the present study was to investigate the temporal changes of moth communities in two forest types of the agroecosystem in the southwestern part of Korea, an isolated hillock forest and a continuous mountain forest. Temporal changes in the numbers of moth species and individuals at both forests showed no significant difference, although the numbers of individuals in the isolated hillock forest were decreased. The relationship between changes in moths and body size based on wingspan revealed that the larger moths decreased more in the isolated hillock forest, whereas no effect of body size on change of moths was observed in continuous mountain forest samples. Non-metric multidimensional scaling resulted in the grouping of moth communities by forest types and 10-year time intervals. In the future, long-term monitoring is needed to track the changes in moth communities in agroecosystems. Additionally, we need to investigate the effect of other ecological variables on changes in moth diversity.
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