• 한국산림과학회지
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• 제104권4호
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• pp.668-676
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• 2015

이 논문은 자연산 임산물에 대한 소비자 인식을 조사하여 수요측면에서 산림복합경영 활성화 방안을 제시하는 데 목적이 있다. 이를 위해 도시 가구 640명을 대상으로 인터넷 설문조사를 실시하였다. 소비자들이 산지재배 임산물을 구입하는 이유는 영양 효능과 안전성 때문이며, 같은 임산물이라도 밭 재배보다 품질이 우수하다고 응답하였다. 산지재배 임산물이 친환경 밭 재배 작물보다 선호되기는 하지만 자연산 인정 여부에는 차이를 보이지 않았다. 소비자들이 임산물 속성 가운데 중요시하는 요소는 품질과 효능으로 나타나 이를 강조하는 마케팅이 요구된다. 소득이 증가하면 신선도와 가격보다 자연산 여부를 중요하게 여기는 것으로 나타났으며 채취체험이 자연산 임산물 구매에 긍정적 영향을 주는 것으로 나타났다. 이러한 결과들은 산림복합경영의 활성화를 위해 자연산 인증을 통해 소비자 신뢰를 획득하고 체험 관광과 연계하는 6차산업화 추진이 필요하다는 것을 시사한다.

• 한국산림과학회지
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• 제108권4호
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• pp.592-599
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• 2019

본 연구는 수간재적과 상관관계가 높은 흉고직경과 수고를 독립변수로 하여 우리나라 일본잎갈나무의 수간재적 추정식을 개발하고자 하였다. 전국의 분포하고 있는 일본잎갈나무를 총 2,840본의 표준목을 벌채하여 수간고별 직경과 수간석해 자료를 수집하여 생장특성을 조사하였다. 6개의 수간재적모델의 적합도 검정을 위하여 적합도지수, 편차, 평균절대편차, 변이계수를 이용하여 모델의 적합성을 판단하였다. 최종 선정된 모델은 흉고직경만을 이용한 Model 1(V=a+bDBH²), 흉고직경과 수고를 이용한 Model 4(V=a+bDBH²H)가 최적의 모델로 선정되었다. 비선형회귀분석을 통한 모델의 절편과 기울기계수인 a, b는 0.05수준에서 통계적으로 유의한 값을 보였다. 적합도지수는 94%~99%로 나타났고, 편차는 두 모델이 0에 근접하였으며, 평균절대편차는 0.01~0.05, 변이계수는 5.97~14.43으로 높은 적합도를 보였다. 본 연구에서 제시된 수간재적모델을 이용하여 현장에서 흉고직경 또는 흉고직경과 수고를 측정한 후 바로 재적을 추정할 수 있으며, 산림경영에 필요한 기초 정보를 제공해 줄 것이다.

• 대한원격탐사학회지
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• 제38권1호
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• pp.57-72
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• 2022

In this paper, we aimed to examine the flowering dates of cherry blossom and the peak dates of maple leaves in South Korea, by the combination of temperature observation data from ASOS (Automated Surface Observing System) and NDVI (Normalized Difference Vegetation Index) from MODIS (Moderate Resolution Imaging Spectroradiometer). The more recent years, the faster the flowering dates and the slower the peak dates. This is because of the impacts of climate change with the increase of air temperature in South Korea. By reflecting the climate change, our statistical models could reasonably predict the plant phenology with the CC (Correlation Coefficient) of 0.870 and the MAE (Mean Absolute Error) of 3.3 days for the flowering dates of cherry blossom, and the CC of 0.805 and the MAE of 3.8 for the peak dates of maple leaves. We could suppose a linear relationship between the plant phenology DOY (day of year) and the environmental factors like temperature and NDVI, which should be inspected in more detail. We found that the flowering date of cherry blossom was closely related to the monthly mean temperature of February and March, and the peak date of maple leaves was much associated with the accumulated temperature. Amore sophisticated future work will be required to examine the plant phenology using higher-resolution satellite images and additional meteorological variables like the diurnal temperature range sensitive to plant phenology. Using meteorological grid can help produce the spatially continuous raster maps for plant phenology.

• The Plant Pathology Journal
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• 제29권3호
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• pp.344-349
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• 2013

Intraspecific variation in morphometry of pine wood nematodes Bursaphelenchus xylophilus and B. mucronatus in relation to geographical locations in South Korea was investigated using morphometric characters (body length, a, b and c ratio, stylet length, and spicule length for a male nematode and V (%) value for a female nematode). B. xylophilus was isolated from Pinus thunbergii in Jinju (1998), Ulsan (2000), Yangsan (2000), Mokpo (2001) and Jeju (2004), and from P. densiflora in Gumi (2001). B. mucronatus was isolated from P. thunbergii in Jinju (1991) and from P. densiflora in Milyang (2001). The body length of male and female B. xylophilus had the highest coefficient of variability and showed significant differences among geographical locations. The V (%) value for female B. xylophilus showed the lowest coefficient of variability, changing little with geographical area and host plant. All morphometric characters in B. mucronatus except for stylet length and female body length showed no significant differences between locations or hosts, suggesting they may not be affected by geographical area or host plant.

• Journal of Forest and Environmental Science
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• 제39권1호
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• pp.40-48
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• 2023

Street trees have been incorporated into urban forests to regulate the microclimate and provide shade as well as provide aesthetic and environmental functions and to evaluate their physiological characteristics. Zelkova serrata is a major tree species that has been planted on various South Korean streets. We determined the physiological characteristics of Z. serrata in street trees of Goyang and Paju in Gyeonggi Province. According to survey sites, net CO₂ assimilation rates was 13.9-16.4 µmol CO₂ m^-2s^-1, chlorophyll fluorescence (Fv/Fm) was 0.80-0.82, and proline contents was showed 3.4-3.7 mg g^-1 FW. The studied trees were assumed to be physiologically stressed, but it was found that Z. serrata was planted as street trees were not significantly stressed when compared to chlorophyll fluorescence responses and proline contents. In the future, the continuous monitoring system is needed to evaluate the physiological characteristics of urban trees.

• Animal Systematics, Evolution and Diversity
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• 제31권2호
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• pp.118-121
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• 2015

The water deer, Hydropotes inermis (Cervidae), is native to China and Korea and has two subspecies of the Chinese water deer (Hydropotes inermis inermis) and Korean water deer (Hydropotes inermis argyropus). To date, only the Korean water deer has been reported in South Korea. In this study, however, an intraspecific phylogeny and haplotype analysis based on mitochondrial cytochrome oxidase I indicated that both Korean and Chinese water deer are found in South Korea. The populations of the two Korean genetic lineages did not show distinct geographic distributions. Further morphological studies on the Korean water deer will be required to confirm its taxonomic status.

• Journal of Forest and Environmental Science
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• 제33권4호
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• pp.315-321
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• 2017

This study was carried out to estimate the parameters of stem taper functions, to figure out the best taper model by species, and to compare with previous studies by species, targeting on the stemmed tree samples collected from the Korean red pine (Pinus densiflora), Korean white pine (Pinus koraiensis), and Japanese larch (Larix kaempferi ) stands in Gangwon and North Gyeongsang provinces of South Korea. The seven widely used models were applied in this study, and Muhairwe 1999 model for Korean red pine and Korean white pine and Kozak 2002 model for Japanese larch were evaluated as the best model for each species according to the fit statistics and the predicted stem form comparison. In addition, the predicted diameter was suitably fitted when comparing the previous studies, and the values were more appropriate following stem taper according to neiloid, paraboloid, and cone parts by species. Consequently, the estimation of this study was considered to represent the stem taper well. When comparing stem taper of three species, the diameter was largest in Korean white pine. Overall, the taper models of this study are judged to be useful for estimating stem form and volume computation of Korean red pine, Korean white pine, and Japanese larch.

• Journal of Ecology and Environment
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• 제44권4호
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• pp.241-255
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• 2020

Background: The stem exclusion stage is a stage of forest development that is important for understanding the subsequent understory reinitiation stage and maturation stage during which horizontal heterogeneity is formed. Over the past 11 years (2009-2019), we observed a deciduous broad-leaved forest in the Albongbunji Basin in Ulleungdo, South Korea in its stem exclusion stage, where Fagus engleriana (Engler's beech) is the dominant species, thereby analyzing the changes in the structure (density and size distributions), function (biomass and species richness), and demographics. Results: The mean stem density data presented a bell-shaped curve with initially increasing, peaking, and subsequently decreasing trends in stem density over time, and the mean biomass data showed a sigmoidal pattern indicating that the rate of biomass accumulation slowed over time. Changes in the density and biomass of Fagus engleriana showed a similar trend to the changes in density and biomass at the community level, which is indicative of the strong influence of this species on the changing patterns of forest structure and function. Around 2015, a shift between recruitment and mortality rates was observed. Deterministic processes were the predominant cause of tree mortality in our study; however, soil deposition that began in 2017 in some of the quadrats resulted in an increase in the contribution of stochastic processes (15% in 2019) to tree mortality. The development of horizontal heterogeneity was observed in forest gaps. Conclusions: Our observations showed a dramatic shift between the recruitment and mortality rates in the stem exclusion stage, and that disturbance increases the uncertainty in forest development increases. The minor changes in species composition are likely linked to regional species pool and the limited role of the life-history strategy of species such as shade tolerance and habitat affinity. Our midterm records of ecological succession exhibited detailed demographic dynamics and contributed to the improvement of an ecological perspective in the stem exclusion stage.

• Journal of Ecology and Environment
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• 제41권5호
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• pp.132-141
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• 2017

The importance of forests continues to increase throughout the world, and one of the reasons is that a forest is a major place to emit terpenes, which have been reported to be beneficial to human health. In South Korea, forests occupy about 64% of the total land area and consist mainly of pine and oak trees. Since only a limited number of forests have been analyzed to date, a comprehensive understanding of terpenes emitted from regional forests remains in its infancy in Korea. Here, to gain insights into terpenes from regional forests located in South Korea, we review the characteristics of Korean forests and recent studies on major terpenes emitted from regional forests as well as from native trees dominant in South Korea. We also discuss meteorological factors that affect the terpene emissions in Korean forests. In conclusion, 18 types of terpenes were detected in Korean forests and their compositions in different forests are largely dependent on the dominant plant species in the forest. Moreover, terpene emissions in Korean forests are affected by various environmental factors, including temperature, amount and duration of daylight, season, and age of trees. To improve the understanding of the characteristics of terpene distribution, more studies are required on the terpene production of Korean forests in various regions.

• 한국산림과학회지
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• 제105권3호
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• pp.309-314
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• 2016

변화하는 자연환경에서 식물이 생존하기 위해서는 적절한 유전다양성을 유지할 뿐 아니라 지역적응성을 갖추어야 세대를 성공적으로 이어나갈 수 있다. 만약 유전다양성이 급격히 감소하게 된다면 집단이 쇠퇴하고 소멸 위험성이 커지게 된다. 본 연구는 주변 집단으로 부터 화분이나 종자의 유입이 어려운 소규모 사시나무 집단의 유전구조를 구명하였다. 월악산 미륵리의 사시나무림은 전체 분포면적 $14,000m^2$에 성목은 350개체로 추정되며, 임분내에 설정한 $70m{\times}70m$ 조사구에 출현하는 123개체 중 61개체를 대상으로 AFLP 마커를 이용하여 유전변이를 분석하였다. 조사구내 사시나무의 수령은 평균 16년 최고 32년생이었으며, 개체의 공간적 분포는 약한 밀집 형태를 이루고 있었다. AFLP primer 6조합에서 196개 증폭산물을 확인하였으며, 이 중 151개는 다형성을 보였다. primer 조합당 평균 유전자좌수는 32.7(표준편차=7.2), 이형접합도 기대치($H_e$)는 0.154, Shannon의 다양성 지수(S.I.)는 0.254로 나타나서, 월악산 사시나무는 우리나라 사시나무 집단 평균에 비하여 매우 낮은 유전다양성을 갖고 있는 것으로 나타났다. 공간적 유전구조는 24 m 이내에서 분포하는 개체들 간에 유전적 유사성이 나타났으며, 소규모 면적과 고립된 분포지 특성으로 인하여 비교적 작은 유전군락이 형성된 것으로 생각된다.