계방산의 고도와 사면방위별 하층식생구조 및 지표종 분석 = Understory Vegetation Structure by Altitude and Azimuth Slope and Indicator Species Analysis in Mt. Gyebang

국문 초록 (Abstract)

본 연구는 유전자원보호구역 및 국립공원으로 지정된 계방산의 하층식생구조와 고도 및 사면별 지표종을 구명하기 위해 실시하였다. 조사지 출현식물은 80과 203속 303종 38변종 5품종 4아종 총 350분류군으로 확인되었다. 중요치 분석결과, 관목층에서는 미역줄나무(9.143%), 당단풍나무(7.594%), 노린재나무(6.347%) 등이 우점 하였고, 초본층에서는 조릿대(8.653%), 오리방풀(2.936%), 대사초(2.897%) 등이 우점 하는 것으로 나타났다. NMS 분석결과, 주요종의 분포범위는 고도별 영향이 있는 것으로 밝혀졌다(관목층: R2>0.3, 초본층: R2>0.6). Plexus diagram 분석결과, 당단풍나무는 함박꽃나무, 청시닥나무, 참회나무 등과 연관성이 있으며, 초본층의 벌깨덩굴은 투구꽃, 박새, 귀룽나무등과 연관성이 있는 것으로 분석되었다. 고도에 따른 유의성 있는 지표종은 60종, 사면방위별 유의성 있는 지표종은 30종이 분석되었다. MRPP-test 결과, 고도에 따른 집단 간 종조성은 이질적이며, 사면방위에 따른 종조성은 NE와 SW 간에 이질성이 큰 것으로 분석되었다.

다국어 초록 (Multilingual Abstract)

This study was conducted to investigate composition of understory vegetation and indicator species by altitude and slope azimuth in Mt. Gyebang designated as Protected Area for Forest Genetic Resource Conservation and National Park. Tracheophytes were 350 taxa; 80 families, 203 genera, 303 species, 38 varieties, 5 forma and 4 sub-species in research area. The species of greatest importance value were Tripterygium regelii (9.143%), Acer pseudosieboldianum (7.594%), Symplocos chinensis for. pilosa (6.347%) in the shrub layer and were Sasa borealis (8.653%), Isodon excisus (2.936%) and Carex siderosticta (2.897%). In the herb layer as a result of NMS analysis, the distribution range of the major species were found to be affected by the altitude (shrub layer: R2> 0.3, herb layer: R2> 0.6). The result of plexus diagram analysis showed that Acer pseudosieboldianum was associated with Magnolia sieboldii, Acer barbinerve, Euonymus oxyphyllus etc. in the shrub layer; Meehania urticifolia was associated with Aconitum jaluense, Veratrum oxysepalum, Prunus padus etc. in the herb layer. The significant indicator species were analyzed for 60 species by the altitude and investigated for 30 species in accordance with the slope azimuth. As a consequence of MRPP, interspecies composition along the altitude group was heterogeneous and the species composition according to the azimuth slope was extremely different between the NE and SW.

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