• Korean Journal of Plant Resources
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• v.31 no.4
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• pp.384-395
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• 2018

This study was carried out to investigate the environment factors including community structure and soil characteristics in the wild habitats of Cephalotaxus koreana, and offers the basic information for habitats conservation and restoration. Most of the wild habitats were located at altitudes between 148~835 m with inclinations ranged as $12{\sim}32^{\circ}$. The average soil pH was 4.7~5.9, soil organic matter was 5.72~15.99%, cation exchange capacity was $14.1{\sim}19.9cmolc/kg^{-1}$ and exchangeable $K^+$, $Ca^{2+}$, $Mg^{2+}$ was 0.25~0.48 cmolc/kg, 0.79~6.68 cmolc/kg, 0.31~1.73 cmolc/kg, respectively. The dominant species of tree layer were found to be dominated by Quercus dentata in Jekbo-san (C1), Acer pictum in Bogae-san (C2), Acer pseudosieboldianum in Geumwon-san (C3), Q. serrata in Jiri-san (C4), Zelkova serrata in Baegun-san (C5), and Q. acutissima in Duryun-san (C6). The Species diversity (H') was 0.854~1.234, evenness (J') was 0.654~0.993, and dominance (D) was found to be 0.067~0.346. Correlation coefficients analysis based on environmental factors, community structure and value of species diversity shows that growth of Cephalotaxus koreana is correlated with species diversity and evenness. This result show that Cephalotaxus koreana habitats located in mature stands.

• Korean Journal of Plant Resources
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• v.34 no.4
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• pp.297-310
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• 2021

Lonicera harae is a species of shrub in the Caprifoliaceae family, mostly distributed in East asia. So far, the related research on the genus of Lonicera is insufficient compared to the Lonicera japonica belonging to the same genus, which requires attention to domestic native plants. Therefore, this study aims to provide baseline data for cultivation and utilization through the growth environment and vegetation structure of the natural habitat. Lonicera harae, which plant found throughout the Korean Peninsula. The natural habitats of Lonicera harae is the forest, valley and lowland areas of the southern region. study examined 24 quadrats in 11 regions, including Gwangju, Wanju and Namhae. As a result, environmental condition of Lonicera harae was 8 to 483 m above sea level, normally distributed over 173 m, Slope was 5 to 25 degree with 8.5 degree on average. The list of plants were classified as a total of 229 taxa comprising 80 families, 166 genus, 198 species, 3 subspecies, 24 varieties, 4 forma. As a result of the clustering analysis, the three clusters were divided into three groups; Robinia pseudoacacia, Zelkova serrata, Larix kaempferi. Species diversity was 1.399 and Dominance and Evenness were found to be 0.978 and 0.022 respectively.

• Journal of Life Science
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• v.17 no.3 s.83
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• pp.312-317
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• 2007

This study was conducted to research the morphological characteristics and analyze the genetic diversity by using RAPD in Calanthe species native to Korea. Nine samples were selected by flower color and 19 morphological characteristics. In the length and width of leaf, dorsal sepal, the lateral sepal, the petal, the central lip, and the lateral lip, C. discolor was the shortest and narrowest, respectively, but C. sieboldii was the longest and the widest, respectively. The flower stalk length was the shortest in C. discolor, and the longest in C. sieboldii. Three variants were the intermediate between C. discolor and C. sieboldii in the above morphological characteristics, but spur length was the longest in C. discolor, the shortest in C. sieboldii, and intermediate in the variants. The ovary length in C. discolor was shortest and C. sieboldii and variants were similar with each other. The flower color of C. discolor were brownish red, the value of CIE Lab was between 40 and 50. The flower color of C. sieboldii was yellowish, the value of CIE Lab was between 110 and 130. And variants had various colors between 50 to 70 in the value of CIE Lab. By analyzing multiple band patterns of PCR products, 154 bands were selected as polymorphic RAPD markers. The analysis of genetic similarity of Calanther species using RAPD showed that C. discolor and C. sieboldii are more distant from each other than variants, and these results demonstrated that genetic position of variants located between C. discolor and C. sieboldii.

• Korean Journal of Environment and Ecology
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• v.28 no.6
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• pp.751-761
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• 2014

This study was carried out to analyze the vegetation properties, soil characteristics and ordination of Rhododendron brachycarpum population in South Korea. Rhododendron brachycarpum were mainly distributed along the Ulleungdo and Baekdudaegan of the Korean penninsula and it's population was located at an elevation of 872m to 1466m. The Rhododendron brachycarpum population was classified into Taxus cuspidata var. latifolia dominant population, Magnolia sieboldii dominant population, Thuja koraiensis dominant population and Rhododendron brachycarpum typical population. The composition of soil properties in the same areas are as follows: organic matter, total nitrogen, available phosphorous, exchangeable $K^+$, exchangeable $Ca^{2+}$, exchangeable $Mg^{2+}$ contained, and soil pH. The capacities of these chemical properties of the soil ranged from 10.45~15.28%, 0.37~0.61%, $0.21{\sim}0.35cmol^+/kg$, $0.39{\sim}2.54cmol^+/kg$, $0.17{\sim}0.50cmol^+/kg$, $18.28{\sim}22.81cmol^+/kg$ and 4.66~5.23 respectively. The results of the correlation between communities and soil conditions of vegetation of Rhododendron brachycarpum by DCCA ordination method are as follows: Taxus cuspidata var. latifolia dominant population was found in the very steep sloped area that has low percentage of total organic matter and nitrogen than other populations. Magnolia sieboldii dominant population and Thuja koraiensis dominant population was found in the steep sloped area that has high percentage of total organic matter and nitrogen than other populations. Thuja koraiensis dominant population was found in the gentle sloped area that has high percentage of altitudinal and rock exposure. Current status of Rhododendron brachycarpum is very vulnerable with a collection of herbs constantly threatening the species' survival. Thus, concrete conservation plans to protect natural habitats should be set up as soon as possible.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2021.04a
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• pp.19-19
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• 2021

경남 양산의 천성산에서만 생육하는 산림청·국립수목원 지정 희귀식물(Critically Endangered, CR) 주걱댕강나무 개체군을 대상으로 20개소의 방형구(10×10m, 100m²) 내 개체의 특성(개체수, 개화, 결실 등), 종자의 활력검정, 차광처리에 따른 생육 특성 및 우리나라 전역의 생육가능성에 대해 알아보았다. 20개소의 대상지에서 확인한 개체수는 총 3,270개체이며, 평균 개체밀도는 1.635/m²이다. 평균 수고는 1.1m 정도이며, 평균개화율은 27.37%이고 개화는 1.0~1.8m(평균수고 1.39m) 수고에서 집중되었다. 한편, 결실률은 평균 1.67%로 매우 낮았다. 종자의 크기는 평균 너비 0.27mm, 높이 0.18mm 정도로 너무 작아 X-ray 촬영을 통한 충실검정은 확인할 수 없었다. 종자를 1% Agar배지에 종자를 치상한 후 온도조건(15, 20, 25℃)에 따른 실험 및 온도(15, 20, 25℃)와 GA3 농도(100, 250, 500PPM)처리 실험 모두 발아율은 0%였다. 결실률이 매우 낮고, 종자 발아율 또한 낮으며 지하경을 뻗는 특성으로 보아 종자는 휴면종자이며 영양생장을 취하는 것으로 판단된다. 차광처리에 따른 생육 특성 실험 결과, 신초는 평균 30.6mm 성장, 엽록소 평균 함량 25.30, 잎의 수 평균 8.32개, 잎 길이 평균 35.93mm, 잎 폭 평균 20.37mm정도 성장하여 엽면적은 평균 761.10mm로 나타났다. 생육은 조도계를 활용한 실 차광률로 볼 때, 67.8% > 82.8% > 88.2% > 43.2% > 91.9%의 순서로 나타났다. 주걱댕강나무 자생지 내 수관열림도가 21.86%로 이를 차광률로 환산할 경우 70%내외의 차광률에서 생육이 효율적인 것을 확인하였다. 기후대별로 5개소에 이식한 주걱댕강나무는 이듬해까지 모두 생육이 원활하였다. A. spathulata를 Diabelia ionostachya종들과 가까운 유연관계를 가진다는 연구에서 D. ionostachya 샘플은 위도상 강원도 고성군에 속하고 있어 우리나라 대부분 지역에서 식재가 가능할 것으로 판단된다.

• Korean Journal of Environmental Biology
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• v.25 no.4
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• pp.363-369
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• 2007

To understand property of distribution restricted at northern slope of Corylopsis coreana, we investigated process of sedentary formation from seed germination to seedling and its micrometeorological factors in Cheongsogol, Suncheon in Korea. The germination tests were carried out in-situ and manipulated condition, respectively. Air and soil temperatures, relative humidity, soil water contents and PPFD were measured in southern and northern slopes for four seasons. The seeds did not shown difference in germination to azimuth slope. However, seedling in the northern slope should have taken advantage on the sedentary stage of seedlings because there was low temperature and high humidity during the spring. At the southern slope, the seedlings seemed to have a disadvantage on high temperature and low humidity in spring season. Accordingly, the formation of Corylopsis coreana population is influenced by microclimatic factors, especially in low temperature and high humidity at the sedentary stage of the germinated seedlings.

• Korean Journal of Plant Resources
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• v.34 no.5
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• pp.451-461
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• 2021

In Jeju Island, there are two different types of Opuntia cactus in cladodae, fruit, flower, flowering period and spine. There is no comparative study of these two taxa yet, so it is often seen as the same species. The purpose of this study was to investigate the phylogenetic relationship between the Taxa of the Opuntia monacantha Haw. and Opuntia stricta Haw. in Jeju Island. The results indicate that the two taxa were completely different from each other on the analysis of nrITS, matK and atpB-rbcL gene as well as the morphological comparison. Also, O. monacantha among the two taxa is included in the Elatae series, so South America is the origin, and O. stricta is included in the Scheerianae series, which confirms that North America is the origin. The name of the O. monacantha in Jeju Island was named 'Jeju-Baick-nyun-cho' considering geographical location conditions and symbolic characteristics.

• Korean Journal of Environment and Ecology
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• v.22 no.6
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• pp.609-615
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• 2008

The study was conducted to analyze vegetation and soil characteristic of Corylopsis coreana population in Baekunsan of Gyeonggi-Do, Jirisan, Baekunsan, Jogaesan of Jeollanam-do, and Geumsan of Gyeongsangnamdo. Field research was from September 2005 to September 2006. According to classification with phytosociological method, the Corylopsis coreana population was classified into Tilia amurensis dominant population, Lindera erythrocarpa dominant population, and Pinus densiflora dominant population. According to CCA ordination, the Tilia amurensis dominant population were located in area of high elevation, and high concentration in total nitrogen, available phosphorous, and cation exchangeable capacity(CEC). The Pinus densiflora dominant population were located in area of low elevation, and low concentration in total nitrogen, available phosphorous, and cation exchangeable capacity. The Lindera erythrocarpa dominant population were located in area of high elevation, and medium concentration in total nitrogen, available phosphorous, and cation exchangeable capacity.

• Journal of Korean Society of Forest Science
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• v.97 no.3
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• pp.296-304
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• 2008

This study was carried out to analyze vegetation and soil characteristic, and ordination of Stewartia koreana community. The Stewartia koreana community was classified into Acer mono subcommunity, Pinus densiflora subcommunity, Sapium japonicum subcommunity, and Stewartia koreana typical subcommunity. In the study sites, soil organic matter, nitrogen, available phosphorous, exchangeable K, exchangeable Ca, exchangeable Mg concentration, cation exchange capacity, and soil pH were ranged from 14.31~34.27%, 0.33~0.77%, 7.83~22.88(mg/kg), 0.23~1.07(me/100 g), 0.29~2.93(me/100 g), 0.33~1.49(me/100 g), 10.47~22.48(me/100 g), and 4.65~4.96, respectively. The area of the Acer mono subcommunity, found in highlands, showed that contained the highest organic substances, nitrogen, available phosphorous, and cation exchangeable capacity concentration among the communities. The low elevation regions where the Pinus densiflor subcommunity is formed, showed the lowest concentrations of exchangeable Ca, and Mg.

• Journal of the Korean Institute of Landscape Architecture
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• v.29 no.3
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• pp.46-54
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• 2001

도시녹지 면적 확대의 해결책으로 부각되고 있는 옥상정원은 조성이 용이해야 하며, 옥상정원 조성에 있어 가장 문제시되는 하중 또한 고려되어야 한다. 이러한 문제들로 인해 최근 경량 인공토양의 이용 필요성이 부각되고 있으나, 자연토양에 비해 고가(高價)라는 이유로 자연토양이 주로 이용되거나, 인공토양이 이용되더라도 대부분 무기질계 단종(斷種) 인공토양만으로 시공되고 있어 식물 생육측면에서 단점 보완이 요구되고 있다. 따라서, 본 연구는 옥상정원 조성에 이용 가능한 유·무기질계 인공토양들을 혼합 조성하여 그 물리·화학적 특성을 살펴보고, 각각의 혼합 인공토양 및 토심에 따른 식물생육을 조사해 봄으로써 이용 가능성을 살펴보았다. 12종류의 혼합 경량 인공토양 및 5종류의 토심(5, 10, 20, 30cm)으로 조성된 인공지방산에 2000년 6월 7일 비비추(Hosta longipes)를 정식하였으며, 정식 112일 후에 최종 생육조사를 실시하였다. 혼합 경량 인공 토양 및 토심에 따른 토양의 물리 화학성은 인공토양 분석법을 기초로 조사 분석하였다. 그 결과, 1) 질석;피트모스(1:1, v/v), 펄라이트:질석:피트모스(1:1:2, v/v/v), 펄라이트;피트모스;입상암면(1:1:1, v/v/v) 혼합 경량 인공토양에서 비비추의 생육이 가장 좋았으며, 물리·화학성도 다른 토양에 비해 양호하였고, 하중도 적게 측정되었다. 2) 토심에 따른 비비추의 생육에서는 토심 10∼20cm에서 유의적인 차이를 보이지 않아, 토심 10cm에서도 자생 초화류의 생육이 가능할 것으로 판단되었다. 3)또한 인공토양의 물리·화학적 특성과 식물 생육(생체중)과의 상관관계를 조사한 결과 전기전도도(EC), Na함량 및 토양표면 온도가 식물 생육에 있어 다른 요인들에 비해 더 큰 영향을 끼침을 살펴볼 수 있었다. 위의 결과들을 살펴볼 때 혼합 경량 인공토양은 토심을 낮추어 하중을 감소시킬 수 있을 뿐 아니라 식물 생육측면에서도 긍정적인 효과를 나타내 기존 건물의 옥상정원에서도 이용이 가능할 것으로 보인다. 그러나 본 실험에서는 더 나아가 저장기적인 혼합 인공토양의 물리·화학성 변화 및 식물생육을 살펴보는 연구 또한 이루어져야 할 것으로 생각된다.