• Journal of Ecology and Environment
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• 제38권4호
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• pp.405-413
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• 2015

We classified the streamside plant community by phyto-sociological method and analyzed the relationship between environment factors and vegetation structure by using the classification and ordination method. We found that twenty one plant communities were classified according to dominant species at the natural streamside valley forest with surveying the 65 quadrats (10 m × 10 m). From the survey results, the hardwood plant communities were classified as streamside valley forest and the softwood plant communities as riparian forest according to the degree of flooding. The valley forest had a distribution of 17 plant communities which was 65% (42 quadrats) of 65 quadrats: Maackia amurensis community, Betula davurica community, Quercus variabilis community, Pinus densiflora community, Q. serrata community, Prunus sargentii community, and Meliosma oldhamii community etc. The riparian forest had a distribution of four plant communities which was 35% (23 quadrats) of 65 quadrats: Salix koreensis community, S. rorida community, S. purpurea var. japonica community, and S. glandulosa community, etc. From the two-way indicator species analysis (TWINSPAN) analysis, we found indicator species Oplismenus undulatifolius and Lindera obtusiloba for the streamside valley forest and Humulus japonicus, Phragmites japonica, and S. koreensis for the riparian forest. From the results of the canonical correspondence analysis (CCA), coordinates, altitude, and stream structure showed low correlation to the distribution of the plant community. Therefore, it seemed that valley forest and riparian forest were distinguished by the stream gradient and waterway width which determined by the stream water level.

• 농업생명과학연구
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• 제43권6호
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• pp.19-27
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• 2009

본 연구는 산불 피해지에서의 임분구조 및 입지환경인자를 분석함으로서 이에 따른 산화 피해정도를 모형화하고 산화피해지의 피해목 처리에 따른 구성종의 종다양도 및 그 식생회복 형태를 구명하고자 하였다. 입지환경인자에 의한 산화피해율간의 관계를 정준상관 분석 및 로지스틱 회귀분석한 결과, 해발고 200m, 100m, 사면경사가 30도 이상인 입지의 임분밀도가 높은 소나무단순단층림이 산화 발생 피해율이 높은 것으로 추정되었다. 산화지 피해목 처리방법에 따른 식생회복 과정을 분석한 결과 피해목 존치보다는 피해목을 제거하는 것이 식생회복에 효과적이라 사료되었다. 따라서 산불피해지에 대한 식생회복을 위한 적절한 시업적 조치는 입지, 자생 수종 등을 복합적으로 고려하여야 할 것으로 사료되었다.

• 대한원격탐사학회지
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• 제22권5호
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• pp.313-323
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• 2006

Forest Canopy Density is a dynamic process mediated by various natural and anthropogenic factors. It can be changed over time and locations in the same forest type and landscape. However, human dimensions are considered as the primary force of landscape change and subsequent forest canopy loss in tropical regions of the world. Many studies have been indicated that roads have a far greater impact on forests than simply allowing access for human use. Similarly, rivers have been used as means of transportation, hence illegal logging and felling further deplete forest canopy density. The main objective of this study was to investigate the spatio-temporal dynamic alterations of Forest Canopy Density (FCD) across with site associated factors such as biophysical, physical and human interferences in tropical region of Nepal from 1988 to 2001. Landsat TM and ETM+ of 1988 and 2001 were used to assess the spatial and temporal dynamic alterations of FCD. This analysis revealed that distance to human settlements at P=<0.01, rivers, human interferences (path and fire) and species composition had a statistically significance at P=<0.05 level. However, other factors did not show any significant relation. So, we concluded that understanding of dynamic alterations of FCD with respect to factors was quite complex phenomena. Other surrounding environment could also playa significant role. A comprehensive analysis could be required to understand such complexities. Therefore, additional factors such as climatic, biophysical, social, and institutional with respect to spatio-temporal variability should be considered for the better understanding of canopy dynamic.

• 한국환경과학회지
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• 제20권6호
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• pp.721-728
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• 2011

This study investigates the users' perception of the importance and performance of National Recreation Forest Service Programs quality, forest environmental education and cultural benefits, with the aim of improving the level of service quality within the programs. An Important-Performance Analysis (IPA) was performed to determine significant patterns. The IPA results showed that most users' perceived as important how well the service programs performed to meet their expectations. The enclosed study finds, for example, users' answered that three factors which were less important to them were entrance fee, size of program center or facilities and amount of information. These factors performed poorly, and the program of guidance indicates the need for improvement of these factors. In addition, the finding also suggests how recreational service programs in the future can complement and improve what they offer. These are as follows. The process of preparation and content of the program order need to be effectively established. The Program Director needs to maintain a friendly attitude and must have ongoing training on how to provide effective programs. For programs to be enjoyable and satisfying for users, the location of the programs should provide a comfortable environment. Also, detailed program guidance is required for users' convenience. It is expected that the results of this study will be useful when ameliorating and establishing the marketing strategy of the National Recreation Forest Service Programs.

• 한국산림과학회지
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• 제109권4호
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• pp.438-445
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• 2020

본 연구는 산림소유역에 시공되어 있는 사방댐내의 토사유출량에 영향을 미치는 산림환경 인자를 분석하고 수량 화이론(I)를 이용하여 예방적인 측면에서 사방댐 시공적지를 선정하고 예측하였다. 각 산림환경 인자의 범위를 추정한 결과, 준설경과년수(0.7495)가 가장 높게 나타나 산림소유역 토사유출량에 큰 영향을 미치는 것으로 추정되었으며, 다음으로는 경급(0.6000), 소밀도(0.5318), 유역면적(0.3416), 사면경사(0.3207), 강수량(0.3160), 고도(0.2990), 토양형(0.2192)순으로 나타났다. 각 인자의 범주별 상대점수를 74개 사방댐의 각종 인자에 반응시켜 사방댐의 시공적지를 예측할 수 있는 판정표를 개발하였고, 판정표를 이용하여 시공적지를 I급지(Very suitable site) 2.2496 이상, II급지(Suitable site) 1.1248~2.2495, III급지(Poor suitable site) 1.1247 이하로 구분하였다.

• 한국환경보건학회지
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• 제47권6호
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• pp.548-557
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• 2021

Background: Due to the emergence of new diseases such as COVID-19, an increasing number of people are struggling with stress and depression. Interest is growing in forest-based recreation for physical and mental relief. Objectives: A prediction model equation using meteorological factors and data was developed to predict the quantities of medicinal substances generated in forests (monoterpenes) in real-time. Methods: The concentration of phytoncide and meteorological factors in the forests near Chuncheon in South Korea were measured for nearly two years. Meteorological factors affecting the observation data were acquired through a multiple regression analysis. A model equation was developed by applying a linear regression equation with the main factors. Results: The linear regression analysis revealed a high explanatory power for the coefficients of determination of temperature and humidity in the coniferous forest (R²=0.7028 and R²=0.5859). With a temperature increase of 1℃, the phytoncide concentration increased by 31.7 ng/Sm³. A humidity increase of 1% led to an increase in the coniferous forest by 21.9 ng/Sm³. In the deciduous forest, the coefficients of determination of temperature and humidity had approximately 60% explanatory power (R²=0.6611 and R²=0.5893). A temperature increase of 1℃ led to an increase of approximately 9.6 ng/Sm³, and 1% humidity resulted in a change of approximately 6.9 ng/Sm³. A prediction model equation was suggested based on such meteorological factors and related equations that showed a 30% error with statistical verification. Conclusions: Follow-up research is required to reduce the prediction error. In addition, phytoncide data for each region can be acquired by applying actual regional phytoncide data and the prediction technique proposed in this study.

• Journal of Forest and Environmental Science
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• 제35권1호
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• pp.31-40
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• 2019

Daphne pseudomezereum var. koreana is an endangered deciduous shrub distributed in mountain areas that is vulnerable to climate change. The purpose of this study was to provide foundational data on the physical characteristics, soil environment, and vegetation structure of habitats of Daphne pseudomezereum var. koreana habitat in Korea in order to help with management decisions on ecosystem restoration. Rock exposure was 15 to 35%, with an average of 24%. The native habitat of D. pseudomezereum included 129 taxa consisting of 46 families and 95 genera. Two-way cluster analysis divided the habitat into three plant communities: Community I (dominaterd by Tilia amurensis and Quercus mongolica), Community II (dominaterd by Fraxinus rhynchophylla and Acer pseudosieboldianum), and Community III (dominaterd by Ulmus davidiana var. japonica). The diversity indices for Communities I, II, and III were 1.124, 1.047 and 0.932, respectively. The soils were loam or clay loam. Soil pH, organic matter content, and available phosphoric acid were 5.40, 14.38%, and 31.08 ppm, respectively. Ordination analysis resulted that most significant factors influencing D. pseudomezereum distribution were magnesium content of soil, shrub layer, and altitude.

• 한국산림과학회지
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• 제96권4호
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• pp.494-501
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• 2007

지리산국립공원 내 사유림이용에 있어서 이해당사자 간 갈등이 발생되고 있다. 따라서 본 연구의 목적은 지리산국립공원의 가치와 갈등에 대해 이해주체 간 인식차이를 규명하고 갈등해결을 위한 합의점을 도출할 수 있는 가능성을 찾는데 있다. 이를 위해, 국립공원의 가치와 갈등인자에 대해 요인분석을 실시하여 각각 4가지 요인으로 축약하였다. 그리고 이해주체 간 인식 차이는 t-검정과 Duncan다중검정으로 구분 비교하였다. 그 결과, 국립공원의 가치에 대한 인식은 마을주민과 산림청 지자체는 인식을 같이 하고 있었으나, 국립공원은 대립적으로 인식하고 있었다. 그리고 갈등에 대한 인식은 국립공원과 산림청 지자체가 인식을 함께하고 있었으나, 마을주민은 대립적으로 인식하고 있었다. 갈등해결을 위한 방향으로 협의체 구성과 이유에 있어서 이해주체 모두 인식을 함께 하였고, 산림이용을 위한 명확한 행위기준이 필요하며, 규제정책의 집행에 있어서 규제수단은 용도지구에 따라 차등적으로 적용할 필요가 있다고 사료된다.

• Journal of the Korean Wood Science and Technology
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• 제35권3호
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• pp.79-87
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• 2007

추출에 의해 얻어진 천연염료로 염색한 착색 밤나무재의 변색방지를 위하여 래커 마감도장시편는 500 lux의 실내광 및 50,000~70,000 lux의 실외광 수준의 광변색, 내산성, 내알칼리성, 내열성 영향을 시편의 색차로 측정하였다. 모든 변색실험에서 래커 마감처리 한 시편이 빛, 산, 알칼리, 온도 등에 기인한 변색방지에 효과를 나타내는 것을 알 수 있었다. 또한 염액의 pH가 알칼리로 짙어질수록 천연염색 가구재의 광변색을 경감시키는데 효과적인 것으로 나타났다.

• 생태와환경
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• 제50권4호
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• pp.374-380
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• 2017

Pine wilt disease (PWD) is one of the hazardous pine tree diseases in whole world. In Korea, PWD has been spreading since it was first observed in Busan in 1988. Dispersion of PWD is mainly mediated by its vectors such as Japanese pine sawyer. In this study, we characterized environmental condition including meteorological factors, geographical factors, and land use factors influencing on the occurrence of PWD. The occurrence data of PWD were collected at 153 sites where were the initial occurrence sites of PWD in local government regions such as city, Gun, or Gu scale. We used Akaike Information Criterion (AIC) to evaluate the relative importance of environmental variables on the discrimination of occurrence or absence of PWD. The results showed that altitude, slope, and distance to road were the most influential factors on the occurrence of PWD, followed by distance to building. Finally, our study presented that human activities highly influenced on the long term dispersal of PWD.