한반도 아고산지대내 기후변화 취약식물종의 식물계절성 변화 연구 - 덕유산 정상 지역을 중심으로 -
Plant Phenology of Threatened species for Climate change in Sub-alpine zone of Korea- Especially on the Summit Area of Mt. Deogyusan -
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본 연구는 한반도내 아고산지대인 덕유산 정상지역 일대에 분포하는 기후변화 취약식물종인 목본식물 20종, 초본식물 18종 총 38종을 대상으로 2009년 5월부터 2010년 11월까지 식물계절 변화 모니터링을 실시하였다. 조사식물은 개엽, 개화, 낙화, 단풍, 낙엽 등 5개의 특성으로 구분하여 기후변화에 따른 아고산지대내 기후변화 취약종의 식물계절 변화를 분석하였다. 기상 자료는 2009년 11월 말부터 2010년 12월 초까지 측정되었으며 조사 결과, 기온은 향적봉-중봉 지역에서 최대가 30.4℃, 최소가 –20.3℃로 조사되었으며, 상대습도는 최고 100%, 최소 3.4%로 조사되었다. 덕유산 향적봉과 중봉지역의 개엽시기를 조사한 결과 박새, 산오풀 등을 제외한 대부분의 종들은 비슷하거나 전년도에 비해 6∼20일 정도 늦게 나타났다. 개화시기는 식물계절 변화 중 가장 큰 차이를 보였으며, 이른 봄에 개화하는 처녀치마, 산철쭉, 노랑제비꽃은 2차년도에 13일∼20일 빠른 것으로 관찰되었으며, 늦은 봄과 여름에 개화하는 백당나무, 풀솜대, 개시호 등은 2차년도에 6일∼10일 늦은 것으로 나타났다. 낙화시기와 단풍시기는 전년도에 비해 10일∼18일 늦은 것으로 나타났고, 낙엽시기는 전년도와 유사한 경향성을 보였다. 본 연구결과 기후변화의 영향이 한반도 아고산지대에 분포하는 기후변화 취약종들에게 상당히 미치고 있는 것으로 나타났다.
Abstract
We investigated the plant phenology on the threatened species for climate change in the summit area of Mt. Deogyusan which is a representative sub-alpine zone in Korea. We had performed the monitoring survey of plant phenology on 38 species including 20 trees and 18 herbs from May 2009 to November 2010. The investigated phenological charateristics were five dates for leafing, flowering, floral abscission, autumn leaf colors and leaf abscission on each plant species in sub-alpine region. The climate data were measured from November 2009 to December 2010. The range of temperature was from 30.4 to –20.3℃ at Hyangjeokbong to Jungbong region, and the relative humidity was 100% to 3.4%. The leafing dates in 2010 were similar to 2009 or were 6-20 days delayed in most of the investigated species except Veratrum oxysepalum and Sanguisorba hakusanensis which showed 8 days earlier leafing dates in 2010. The biggest difference among phenological characters was found in flowering dates. The flowering dates of early Spring blooming species such as Heloniopsis koreana, Rhododendron yedoense for. poukhanense and Viola orientalis showed 13-20 days earlier in 2010, and the several summer flowering species as Viburnum opulus var. calvescens, Smilacina japonica and Bupleurum longeradiatum showed 6-10 days delay in 2010. The dates for floral abscission and autumn leaf colors in 2010 were delayed about 10-18 days, and leaf abscission dates were similar to 2009. The effects of climate change on the phenology for the threatened species in sub-alpine zones of Korea are occuring especially on flowering, floral abscission and autumn leaf colors.
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