• Journal of the Korean Society of Environmental Restoration Technology
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• v.16 no.1
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• pp.159-170
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• 2013

The effect of climate change on urban woody plants remains difficult to predict in urban areas. Depending on its tolerances, a plant species may stay and survive or stay with slowly declining remnant populations under a changing climate. To predict those vulnerabilities on urban woody plants, this study suggests a basic bioclimatic envelop model of heat requirements, cold tolerance, chilling requirements and moisture requirements that are well documented as the 'climatic niche'. Each component of the 'climatic niche' is measured by the warmth index, the absolute minimum temperature, the number of chilling weeks and the water balance. Regarding the utility of the developed model, the selected urban plant's present probabilities are suggested in the future climate of Seoul. Both Korea and Japan's thermal thresholds are considered for a plant's optimal climatic niche. By considering the thermal thresholds of these two regions for the same species, the different responses observed will reflect the plant's 'hardening' process in a rising climate. The model illustrated that the subpolar plants Taxus cuspidata and Ulmus davidiana var. japonica are predicted to have low suitability in Seoul. The temperate plants Zelkova serrata and Pinus densiflora, which have a broad climatic niche, exhibited the highest present probability in the future. The subtropical plants Camellia japonica and Castanopsis cuspidata var. sieboldii may exhibit a modest growth pattern in the late 21C's future climatic period when an appropriate frost management scheme is offered. The model can be used to hypothesize how urban ecosystems could change over time. Moreover, the developed model can be used to establish selection guidelines for urban plants with high levels of climatic adaptability.

• Journal of Environmental Science International
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• v.23 no.1
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• pp.39-46
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• 2014

This study surveyed Abies koreana to identify the correlation between its vegetation structure according to its slope direction and seedling establishment in a bid to build basic research data on the changes and conservation of the A. koreana in Hallasan Mountain. The findings of its vegetation structure revealed that in both areas, Importance value was given to the A. koreana for its tree layer, the Taxus cuspidata for its shrub layer, and the Sasa quelpaertensis for its herb layer. However, in the Youngsil area with the tree layer, high importance was given to deciduous broad-leaved trees such as Prunus maximowiczii, Quercus mongolica, and the young species of the A. koreana in the shrub layer that can maintain the A. koreana forest's greater importance in the Jindallebat than in the Youngsil. Thus, the A. koreana forest in the Jindallebat is believed to lastlonger. The findings of correlation between the quantity of seedlings and their location by area revealed that in each tiny quadrat, the A. koreana seedling averaged 5.3 in the Youngsil and 2.9 in the Jindallebat. Both areas were all found to have a positive correlation in terms of rock exposure ratio and dead tree ratio as well as a negative correlation with regard to the cover degree of S. quelpaertensis, the canopy gap, the total vegetation, and the herb layer. It was found that the cover degree of the herb layer in the Youngsil and the S. quelpaertensis in the Jindallebat had the largest impact on the A. koreana seedlings.

• The Korean Journal of Quaternary Research
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• v.15 no.1
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• pp.53-61
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• 2001

To examine the effects of El Nino-Southern Oscillation (ENSO) on the tree growths of central Korea, tree rings of Korean pine(Pinus koraiensis) , Japanese red pine (Pinus densiflora) and yew (Taxus cuspidata) were analyzed. Korean pine and red pine samples were collected from 4 and 7sites in Sorak Mountain ranges, respectively ; yew from one site in Sobaek Mountain. Correlations between ring-width and monthly temperature data showed generally positive relationships for the Korean pine and yew chronologies, but negative ones for the red pine chronologies. In the analysis of correlation between ring-width and monthly S0 index data, only one Korean pine chronology at the lower Hangaerung valley site, and one red pine chronology at Baekdamjang shelter site showed significant relationships ; negative with April SOI for the former and positive with previous August-September SOI for the latter. The other chronologies at higher elevation sites did not indicate any significant correlations with SOI.

• Korean Journal of Environment and Ecology
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• v.21 no.2
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• pp.113-119
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• 2007

To investigate the vegetation structure at Orimok of Hallasan national park, 28 plots$(2,000m^2)$ were surveyed by random sampling method. Carpinus tschonoskii was a major woody species in the studied area in Orimok, and Quercus gorsseserrata, Quercus serrata, and Quercus mongolica were partly occupied. High negative correlations were shown between C. tschonoskii and Ilex macropoda, Lindera erythrocarpa, Quercus mongolica Comus walteri and Symplocos coreana, and relatively high positive correlations were proved to exist between Acer pictum var. mono and Carpinus cordata, Quercus gorsseserrata Ilex macropoda and Lindera erythrocaypa, Q. mongolica Abies nephrolepis and Prunus sargentii, Kalopanax septemlobus Taxus cuspidata and Symplocos coreana. Species diversity(H') was 0.771, and it was relatively low numerical value compared to that of other national parks.

• Korean Journal of Environment and Ecology
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• v.21 no.2
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• pp.161-167
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• 2007

To investigate the structure and the conservation strategy of Korean native species, the Abies koreana forest at sub-alpine zone centering on the Witsaeorum(1,714m) shelter in Hallasan National Park was selected for a survey subject with 20 plots $(10{\times}10m)$ set up with random sampling method. Mean importance percent(MIP) of Abies koreana showed the highest numerical value-57.7%, and that of faxus cuspidata was the next value-16.2%. High positive correlations were shown between Taxus cuspidata and Prunus maximowiczii, Euonymus alatus; Betula ermani and Berberis amurensis var. quelpaertensis, Prunus sargentii; Prunus maximowiczii and Euonymus alatus; Berberis amurensis var. quelpaertensis and Prunus sargentii. Vigor of Abies koreana was so low that as much as 6.44% of total number of Abies Koreana investigated were dead. DBH of dead individuals ranged mainly from 5cm to 15cm.

• Korean Journal of Plant Resources
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• v.33 no.2
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• pp.93-105
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• 2020

The study was investigated in vegetation and environmental factors of Thuja koraiensis habitats where provided for ecological evidence data for conservation and management. Study plots were located at altitudes of 1,000~1,588 m with inclinations of 10~30°. A total of 150 taxa was identified 22 quadrates in 6 study sites. The highest basal area was analyzed in Mt. Gariwangsan 49.98 ㎡/㏊ with the lowest Mt. Hwaaksan 3.46 ㎡/㏊. Thuja koraiensis forest was classified into two communities; Abeis nephrolepis-Taxus cuspidata community, Betula ermanii-Thuja koraiensis community. As a result of Multi-Response Permutation Procedures test, there was significant difference among the communities.

• Korean Journal of Environment and Ecology
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• v.6 no.1
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• pp.44-54
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• 1992

A survey of subalpine zone (altitude is 1, 440-1, 700m) in Mt. Halla, was conducted using 37 sampling plots of l00$m^2$ size. The classification by TWINSPAN and RA. DCA ordination were applied to the study area in order to classify them based on woody plants and environmental variables. And to investigate vegetation deterioration by livestock's and user's impact on subalpine zone, seventeen plots were set up. By TWINSPAN techniques, the plant community were divided into five groups by the altitude. The dividing groups are Abies koreana-Taxus cuspidata community, Rhododendron yedoense var. poukhanense-Rh. mucronulatum var. ciliatum-Sasa quelpaertensis community, Ilex crenata- Elaeagnus umbellata-S. quelpaertensis community, Rh. yedoense var. poukhallense-Juniperus chinensis var. sargentii-Rh. mucronulatum var. ciliatum community and Empetrum nigrum var. japonicum-J. chinensis var. sargentii community. The species divirsity of plant community were decreased severely by livestock's and user's impact.

• Journal of Ecology and Environment
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• v.43 no.4
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• pp.390-399
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• 2019

Background: The Northern Hemisphere forest ecosystem is a major sink for atmospheric carbon dioxide, and the subalpine zone stores large amounts of carbon; however, their magnitude and distribution of stored carbon are still unclear. Results: To clarify the carbon distribution and carbon budget in the subalpine zone at volcanic Jeju Island, Korea, we report the C stock and changes therein owing to vegetation form, litter production, forest floor, and soil, and soil respiration between 2014 and 2016, for three subalpine forest ecosystems, namely, Abies koreana forest, Taxus cuspidata forest, and Juniperus chinensis var. sargentii forest. Organic carbon distribution of vegetation and NPP were bigger in the A. koreana forest than in the other two forests. However, the amount of soil organic carbon distribution was the highest in the J. chinensis var. sargentii forest. Compared to the amount of organic carbon distribution (AOCD) of aboveground vegetation (57.15 t C ha^-1) on the subalpine-alpine forest in India, AOCD of vegetation in the subalpine forest in Mt. Halla was below 50%, but AOCD of soil in Mt. Halla was higher. We also compared our results of organic carbon budget in subalpine forest at volcanic island with data synthesized from subalpine forests in various countries. Conclusions: The subalpine forest is a carbon reservoir that stores a large amount of organic carbon in the forest soils and is expected to provide a high level of ecosystem services.

• KSBB Journal
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• v.9 no.3
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• pp.299-305
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• 1994

Taxol contents in various parts of 15 years old yew tree were determined. The descending order of taxol content per unit mass was stem bark, root bark, needle and seed. In the seed, that order was seed coat, embryo and endosperm. The total amount of taxol extractable from a 15 years old yew tree was 1.68 gram. This amount was distributed in needle, stem bark, root bark and seeds as 48.0, 23.8, 27.9 and 0.4%, respectively. Altitudinal variation of taxol content was also observed. More taxol was observed in yew trees grown at high altitude over 1000m above sea level. Calli and suspension cultures were induced from various yew trees. The presence of taxo] in cultured cells was established bv HPLC. The taxol content in cultured cells were different according to the source of explants. These results may be useful for the goal of large scale taxol production by cultured yew tree cells.

• Korean Journal of Environment and Ecology
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• v.23 no.3
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• pp.272-279
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• 2009

The purpose of this study is to examine noise attenuation according to hedge species and thickness of their leaves. The order of their decrease effects was as follows from the highest to the lowest: Osmanthus asiaticus, Camellia japonica, Pyacantha angustifolia, Photinia glabra, Pittosporum tobira, Nandina domestica, Euonymus japonica, Chaenomeles lagenaria, Aucuba japonica for. Variegatar. The result of the experiment for noise atteunation has shown that woody plant with thicker leaves were better than those with thinner leaves. Multiple Regression Analysis showed Y = 7.653 + 26.530 X ($R^2$= 0.385). The order for the subjects according to their effects on noise attenuation is as follows from the highest to the lowest: Camellia japonica, Nandina domestica, Pittosporum tobira, Taxus cuspidata, Chaenomeles lagenaria. The noise attenuation level of Camellia japonica was the highest (14.70[dB]), while that of Chaenomeles lagenaria was the lowest (6.80[dB]), and its difference between them was 7.9[dB].