• The Korean Journal of Ecology
• /
• v.5 no.4
• /
• pp.187-203
• /
• 1982

The results obtained from te field investigations of Chuja Island conducted for 5 days from July 18 to 22, 1980 and from August 12 to 16, 1981 are summarized as follows: Vascular plants of this island disclosed by the present study consisted of 86 families, 210 genera, 228 species, 38 varieties and 4 래금. Nineteen species of evergreen broad-leaved trees were discovered, including Litsea japonica Juss, Camellia japonica L. and Machilus thunbergii Sieb. et Zucc. These indeciduous latifoliate trees were preserved in poor condition. Ten-twenty years old Pinus thunbergii was confirmed to be the predominant species. Seaside plants encountered were 6 species, including Vitex rotundifolia L. Fil. and Asterspathullfoius Max., but they were poorly distributed. Naturalized plants comprised a total of 12 species. This varied number of species is considered attributable to the frequent access of men owing to convenient marine traffic. the destruction of vegetation of this island may be attributed to human interference (loggin for boat construction, building and charcoal materials) ever escalated by high population density. It is worthy of noting that Bochmeria penosa Nakai et Stake which forms a large community in this island can be used as textile resources.

• Journal of Environmental Science International
• /
• v.29 no.2
• /
• pp.123-132
• /
• 2020

Seasonal changes in the CO₂ fixation rate and water-use efficiency in the leaves of six evergreen and two deciduous broad-leaved tree species on Jeju Island, Korea, were measured using a portable photosynthesis analyzer, to identify which species are most efficient in taking up CO₂ from the air. The CO₂ fixation rate was high in the deciduous species in spring and summer and decreased in fall, whereas it was high in the evergreen species in summer and fall and decreased in winter. The rate remained high in the deciduous tree Prunus yedoensis from spring to fall (> 7.1 μmol CO₂/m₂/s) and in two evergreen trees, Castanopsis cuspidata var. sieboldii and Cinnamomum camphora, in summer and fall (7.0 9.9 μmol CO₂/㎡/s). Therefore, these tree species fix atmospheric CO₂ effectively. The water-use efficiency was higher in evergreen species than in deciduous species regardless of the season. Exceptionally, it was high in the deciduous species Zelkova serrata in spring and summer (> 100 μmol CO₂/mol H₂O), suggesting that Z. serrata is a useful tree for dry conditions due to its tolerance of water stress. The regressions of the CO₂ fixation rate versus the evaporation rate and stomatal conductance were linear and non-linear, respectively. This suggests that the stomatal activity of leaves plays an important part in CO₂ fixation of plants. In conclusion, C. cuspidata var. sieboldii, C. camphora, and P. yedoensis should be planted along roads or in urban spaces for the greening of cities and mitigation of CO₂ concentrations in the air.

• Korean Journal of Environment and Ecology
• /
• v.10 no.1
• /
• pp.66-75
• /
• 1996

To propose basic information for national resource management and planting disign, plant community structure of evergreen broad-leaved forest was investigated. Fifty-two plots(each size 300m$^{2}$) were set up at Ch'omch'alsan area of Chindo, Korea. TWINSPAN and DCA methods were used for classification and ordination analysis. Fifty-two plots were divided into seven groups, which were Quercus variabilis-Carpinus tschonoskii community, Q. glauca community, Castanepsis cuspidata var. sieboldii-Q. stenophylla community, Castanopsis cuspidata var. sieboldii-Camelia japonica community, Q. acuta-Camelia japonica community, Carpinus coreaca-Q spp. community, C. coreana community. Pinus densiflora almost have been selected. Carpinus tschomoskii, Q. variabillis and Q. serrata were to be succeeded by Castanea cuspidata var. sieboldii, Q. stenophylla, Q. acuta and Neolitsea sericea in canopy layer. And Neolitsea sericea, Q. glauca and Camellia japonica was showed high importance values in fertile soil condition. Future restoration plan was necessary for a tourist resort or national forest in warm temperate region. And evergreen broad-leaved plants shall be planted in considering of environmental condition at warm temperate and industrial complex area.

• Journal of the Korean Institute of Landscape Architecture
• /
• v.15 no.2
• /
• pp.23-41
• /
• 1987

This study was conducted to investigate the planting status of the woody landscape plant species and to obtain some fundamental informations for improvement of production and sales circulation of the woody landscape plants. The details of 328 landscape projects which were carried out for 2 years from 1983 to 1984 were surveyed to investigate the utilization status of the woody landscpe plants. The results obtained are summarized as fellows ; 1) The utilization rate of the trees to the shrubs as woody landscape plants was 1 : 6 and that of the evergreens to deciduous plants was 1 : 4. The plant species which were most frequently used in landscaping were Buxus microphylla koreana, Juniperus chinensis, Zelkova serrata and Acer saccharinum, howevr, plants which were used in largest quantitites were Ligustrum obtusifolium, Forsythia koreana, Buxus microphylla koreans and Rhododendron yedoense var. poukhanense. 2) The number of plants planted among 3 shrub species(Ligustrum obtusifolium, Forsythia koreana and Buxus microphylla korana) exceeded half of the total number of shrubs planted for landscping, however, the number of plants planted among 8 tree species including Pinus koreainensis were about half of the total tree species. 3) The number of government price specified plant species was only 20%, but the utilization frequency of the price specified plants was as much as 6 times than unspecified plants and 85% of plants used in landscaping works were the price specified plants. The utilization rate of the price specified plants was significantly high in the shrubs than the trees and in the evergreen than deciduous plants. 4) The amounts in use of the price specified standardized plants were significantly more than those of unstandardized plants. When the plant heights are same, the plants having wider canopy or stem diameter were rather frequently used in the landscaping works. The ratio of the width of the canopy or stem diameter to the stem length of the plants in the Korean standard is significantly greater than that in the Japanese standard.

• Journal of Environmental Science International
• /
• v.29 no.4
• /
• pp.395-402
• /
• 2020

This study was conducted to analyze seasonal variations of de-icing salt ions harvested from soils and plants according to salt damage of Pinus densiflora f. multicaulis, a evergreen conifer, on roadsides. Pinus densiflora f. multicaulis was divided into three groups referred to SD, ND, and WD (serious salt damage (SD) = 71-100%, normal salt damage (ND) = 31-70%, and weak salt damage (WD) = 0-30%) based on the degree of visible foliage damage, and measured acidity (pH), electrical conductivity(EC), and de-icing salt ions (K⁺, Ca²⁺, Na⁺, and Mg²⁺) harvested from soils and plants. The results indicated that acidity, electrical conductivity, and de-icing salt ions of soils and plants were significantly affected by seasonal variation and salt damage. In addition, a strong positive liner relationship was observed in plants between the concentration of de-icing salts and salt damage in spring, while the relationship among seasonal variation and salt damage in soil were not significant. The results from this study has important implications for the management of conifer species in relation to salinity and roadsides maintenance.

• Journal of Environmental Science International
• /
• v.12 no.2
• /
• pp.125-132
• /
• 2003

This study was executed by China along with the Tumen river, which formed border of North Korea and China. As a result 91 family, 282 genera, 363 species, 57 variety 4 species, total 424 taxa of vascular plants were identified. The examination area was include the region that had various vegetation such as upper swampy land, seashore dune, a river, a high mountain grassy plain, deciduous tree zone, evergreen coniferous forest zone. The followings are representative plants, which found in an examination area but not in South Korea. Picea koraiensis, Larix gmelini var. principis-ruprechtii, Betula playphylla, Ulmus pumila, Populus koreana, Ledum palustre var. diversipilosum, Rhododendron parvifolium, Salix brachypoda, Phacelurus latifolius, Carex gotoi, Carex capricornis, Calla palustris, Aquilegia flabellata var. pumila, Lilium davuricum, Astragalus membranaceus, Trifolium lupinaster, Ledebourieila seselodeds, Polemonium racemosum, Scutellaria baicalensis, Linnaea borealis, Thladiantha dubia, Inula helenium, Trollius hondoensis, Hypocaeris ciliata, Aconitum kirinense, Aconitum arcuatum, Potentilla viscosa var. macrophylla. And there are 21 rare and endangered species, which Korean Forest Sevice designated, such as Aconitum koreanum, Acorus calamus var. angustatus, Polygonatum stenophyllum, Drosera rotundifolia, Iris setosa, Jeffersonia dubia, Lilium davuricum, Lilium cernum, Paeonia obovata, Penthorum chinense, Phacelurus latifolius, Rosa marretii, Sparganium stoloniferum, Thymus quinquecostatus, Trillium tschonoskii, Utricularia japonica, Tripterospermum japonicum, Vaccinium uliginosum, Vaccinium vitis-idaea, etc. Especially, plants like, Acanthopanax senticosus, Jeffersonia dubia and Lillum cernum which have high values of ornamental, and medical use are in an extinction crisis. High swampy land was formed to upper stream of Tumen river. It showed representative vegitation, like Carex sp., Scirpus radirans, Eriophorum latifolium. Wetlands plant and a dune plant were mixed in down stream area of Tumen river. On a dune, seashore plants, such as Carex kobomugi, Salsola collina, Raphanus sativus var. raphanistroides, Rosa rugosa, Scutellaria strigillosa, Linaria japonica, Phacelurus latifolius were appeared frequently.

• Journal of the Korean Institute of Landscape Architecture
• /
• v.43 no.3
• /
• pp.1-12
• /
• 2015

The purpose of this study is to offer raw data regarding landscape plantings of traditional cultural heritages by surveying and analysing the actual flora and landscape planting species distributed in Donggung Palace and Wolji Pond in Gyeongju, Korea. The results are as follows. The flora were summarized as 149 taxa including 65 families, 117 genera, 134 species, 1 subspecies, 10 varieties and 4 forms. The naturalized plants were of 18 taxa including Rumex crispus, Trifolium repens, Ailanthus altissima, Veronica persica, Senecio vulgaris, Festuca myuros and the like. Invasive species included Rumex acetosella. As a result of the analysis of chronological changes in landscape planting species, 23 taxa were planted in 1979, whereas 48 taxa were planted in 2014. Therefore, the number of these species increased by 25 taxa. The landscape planting species were of 48 taxa including 6 taxa of evergreen trees, 2 taxa of evergreen shrubs, 27 taxa of deciduous trees, 12 taxa of deciduous shrubs and 1 taxa of other. In present conditions by sections, Section A was 25 taxa, 15 taxa of Section B, 13 taxa of Section C and 29 taxa of Section D. The species planted in common were 4 taxa including Pinus densiflora, Acer palmatum, Euonymus alatus and Rhododendron yedoense for. poukhanense. The problems in the present conditions of landscape planting were volunteer species, the occurrence of scrub and vines and the spread of invasive alien plants. To restore and improve the planting landscape and facilitate tree growth, scrub, volunteer species and invasive alien plants must be removed.

• Journal of Ecology and Environment
• /
• v.42 no.2
• /
• pp.60-69
• /
• 2018

Background: This study was conducted from March 2011 to February 2013 in order to evaluate the ecosystem value by examining the organic carbon distribution and cycling in the Quercus glauca forest, evergreen oak community at Seonheul-Gotjawal, Jeju Island. Results: The amount of organic carbon distribution was $124.5ton\;C\;ha^{-1}$ in 2011 and $132.63ton\;C\;ha^{-1}$ in 2012 for aboveground biomass. And it was $31.13ton\;C\;ha^{-1}$ in 2011 and $33.16ton\;C\;ha^{-1}$ in 2012 for belowground biomass. In total, the amount of organic carbon distribution in plants was 155.63 and $165.79ton\;C\;ha^{-1}$ in 2011 and 2012, respectively. In 2011 and 2012 respectively, the amount of organic carbon distribution was 3.61 and $6.39ton\;C\;ha^{-1}$ in the forest floor and it was 78.89 and $100.71ton\;C\;ha^{-1}$ in the soil. As shown, most carbon was distributed in plants. Overall, the amount of organic carbon distribution of the Q. glauca forest was $238.13ton\;C\;ha^{-1}$ in 2011 and $272.89ton\;C\;ha^{-1}$ in 2012. In 2011, the amount of organic carbon fixed in plants through photosynthesis (NPP) was $14.22ton\;C\;ha^{-1}\;year^{-1}$ and the amount of carbon emission of soil respiration was $16.77ton\;C\;ha^{-1}\;year^{-1}$. The net ecosystem production (NEP) absorbed by the Q. glauca forest from the atmosphere was $5ton\;C\;ha^{-1}\;year^{-1}$. Conclusions: The carbon storage value based on such organic carbon distribution was estimated about $23.81mil\;won\;ha^{-1}$ in 2011 and $27.29mil\;won\;ha^{-1}$ in 2012, showing an annual increment of carbon storage value by $3.48mil\;won\;ha^{-1}$. The carbon absorption value based on such NEP was estimated about $500,000won\;ha^{-1}\;year^{-1}$.

• Journal of the Korean Institute of Landscape Architecture
• /
• v.21 no.1
• /
• pp.125-137
• /
• 1993

Ansan urban nature park is 197.8ha and located in Seodeamun-Gu of Seoul. Flora of Ansan consisted of 141 species, 76 genera, 40 families in woody plants. This study was conducted to analyze the natural environment and establish the park management plan with ecological approach. The result of this study is summarized as follows. 1. The short term plan shall be performed in six vegetation management zones; Robinia pseudoacacia community zone, Sorbus alnifolia community zone, Quercus acutissima community zone, Populus ${\times}$albagrandulosa community zone, Pinus densiflora community zone, and landscape planting zone. Pinus densiflora and landscape planting zones shall be managed artificially, the others managed with ecological approach. 2. The long term plan shall be performed in four vegetation management zones; Robinia pseudoacacia community zone, Quercus spp. community zone, Pinus densiflora community zone, and landscape planting zone. Pinus densiflora and landscape planting zones shall be managed artificially, the others managed with ecological approach. 3. Because soil of Ansan is acidified and the soil disturbed growth of plants, the improvement of soil is necessary. The fertilization shall be performed in three zones; evergreen confierous tree zone(ex. P. densiflora), Quercus spp. zone, and the other deciduous tree zone(ex. R. pseudoacacia).

• Journal of Bio-Environment Control
• /
• v.15 no.1
• /
• pp.100-106
• /
• 2006

A hypertonic solution of sorbitol was used to precondition Douglas-fir and Western hemlock plug seedlings to improve desiccation resistance. Seedlings were preconditioned by soaking their root balls in water, -0.75 or -1.50 MPa sorbitol solution for 22 hr, and then exposed to desiccation conditions for 8 days. During the desiccation period, a transpirational water loss was significantly reduced by the sorbitol preconditioning, with its effect positively depending on concentration. This preconditioning-induced reduction in water loss was mainly caused by the decline in needle stomatal conductance. Sorbitol-induced stomatal control was more closely associated with reduction in plant water potential, rather than increase in abscisic acid concentrations. After rehydration of stressed-plants, most of the preconditioned seedlings with sorbitol were survived, while only 35% of Douglas-fir and 28% of Western hemlock seedlings treated with water were alive. The post-growth was significantly greater in the preconditioned seedlings than only water-treated seedlings. These results suggested that the earlier stomatal control with sorbitol-facilitated preconditioning could play a role in improving desiccation resistance of evergreen woody plants at transplanting in the field where water supply is limited or dry conditions are prevailing.